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Chapter 24

Reading Spectrum and Scales

(Revision 2.10, Apr 2020)

The information in this chapter is provided to assist you in reading the graphical displays of the
various types of data that can be acquired using the Gen II Analyzers.

24.1.

– Reading the X and Y Plotted Vibration Spectrum

A graphic spectrum display allows the user to investigate all aspects of a rotating component
related to vibration. In the figure above, the primary indicators are the plotted peaks that
represent component vibrations.

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Summary of Contents for Cobra II

Page 1: ...II Analyzers ACES Systems TEC Aviation Division Document Number 4041 OM 01 Revision 6 00 April 2020 Part Number 10 300 4041 10737 Lexington Drive Knoxville TN 37932 3294 USA Telephone 865 671 2003 Fax 865 675 1241 Web www AcesSystems com ...

Page 2: ...ation purposes TEC makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose TEC shall not be liable for errors omissions or inconsistencies which may be contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Informa...

Page 3: ... Case 2 9 2 4 4 USB Memory Device 2 9 2 5 Optional Equipment 2 10 2 5 1 USB Keyboard 2 10 3 Using the Gen II Analyzer Rev 2 10 Apr 2020 3 1 Entering Data 3 1 3 1 1 Using the Keys 3 1 3 1 2 Filling in Fields 3 2 3 1 3 Loading a Setup 3 2 3 2 Main Menu 3 7 3 3 Status Pane 3 8 3 4 Common Job Functions 3 9 3 4 1 Start Job 3 9 3 4 2 Resume Job 3 9 3 4 3 Manage Jobs 3 10 3 4 4 Manage Setups 3 18 3 5 Dat...

Page 4: ... 7 21 7 2 3 Connect Sensors 7 22 7 2 4 Select Aircraft Condition 7 24 7 2 5 Data Acquisition 7 25 7 2 6 Review Prior Runs Data 7 26 7 2 7 Solution Screens 7 27 7 3 Main Rotor Manage Data Functions 7 31 7 3 1 Main Rotor Review Job 7 31 7 3 2 View Main Rotor Track and Balance 7 32 7 3 3 View Main Rotor Chart 7 33 7 3 4 View Main Rotor Chart ICFs 7 34 7 4 Resume Job 7 35 7 5 Manage Jobs 7 35 7 6 Mana...

Page 5: ...tup 9 3 9 1 2 Sensor Information Screen 9 7 9 1 3 Transient Balance Speeds Screen 9 8 9 1 4 Define Class Wts Screen 9 10 9 1 5 Balance Plane Information Screen 9 13 9 1 6 Label Detail Wt Holes Screen 9 17 9 1 7 Define Transient Balance ICFs Screen 9 18 9 2 Start Job 9 19 9 2 1 Job Identification Screen 9 19 9 2 2 Engine Information Screen 9 20 9 2 3 Label Detail Wt Holes Screen 9 21 9 2 4 Transien...

Page 6: ...I only Rev 2 20 Apr 2020 12 1 Honeywell Performance 12 1 12 1 1 Necessary Equipment 12 1 12 1 2 Analyzer Operation 12 5 12 1 3 Information Screens 12 14 12 2 Manage Jobs 12 17 12 2 1 Review 12 18 12 2 2 Create Report 12 19 12 2 3 Delete 12 19 12 2 4 Delete All 12 19 12 2 5 Export Job 12 19 12 2 6 Export Logger 12 19 12 3 Overspeed Test EEC N2 DEEC 12 19 12 4 Over Temp Test EEC N2 DEEC 12 19 12 5 E...

Page 7: ...14 23 14 2 Resume Job 14 24 14 3 Manage Jobs 14 25 14 4 Manage Setups 14 25 15 Overall Vibration Survey Rev 4 10 Apr 2020 15 1 Start Job 15 1 15 1 1 Overall Vibration Setup 15 3 15 1 2 Job Identification 15 8 15 1 3 Engine Information 15 9 15 1 4 Equipment Setup 15 10 15 1 5 Microphone Calibration Viper II Only 15 11 15 1 6 Start Engine 15 13 15 1 7 Select Condition 15 13 15 1 8 Collecting Data 15...

Page 8: ...ation 22 11 22 3 3 Analyzer Owner Information 22 12 22 3 4 Battery Information 22 14 22 4 Analyzer Legal Information 22 15 22 4 1 Analyzer Terms and Conditions 22 15 22 4 2 Open Source Components 22 17 22 5 Analyzer License Information 22 17 22 5 1 Add Analyzer License 22 18 22 6 Database Management 22 19 22 6 1 Import Setups From USB Drive 22 20 22 6 2 Restore Jobs from USB Drive 22 21 22 6 3 Cop...

Page 9: ...ailable Function Keys 24 7 24 3 6 Status Messages 24 8 24 3 7 RPM Warnings 24 8 24 3 8 Multiple Vibration Channels 24 8 24 3 9 Reviewing Polar Charts During and After a Job 24 9 24 3 10 Available Function Keys 24 10 24 3 11 Multiple Vibration Channels 24 11 24 3 12 Multiple Conditions 24 11 25 Gen II Specifications Rev 4 10 Jan 2020 Rev History 3 23 2015 Renumbered Table of Contents and added chap...

Page 10: ...elp you overcome common application difficulties whenever possible For technical support please feel free to contact the home office or complete the online form found at https www acessystems com contact us contact support If it becomes necessary for your equipment to be returned to us for any reason a Returned Materials Authorization RMA number will be required The RMA can be issued over the phon...

Page 11: ... the TEC factory in any way which may have impaired its safety operation or efficiency or to any product that has been subjected to accidental damage NOTE Annual calibration by TEC or a TEC authorized service facility is required in order to comply with the terms of the 5 year warranty See Calibration and Certification in this section for details Warranty does not cover any cost incurred by Purcha...

Page 12: ...ed as calibrated by a sticker stating the date of calibration and next due date of calibration A certificate of calibration will be provided to you to verify compliance to inspectors A permanent record of your calibration is maintained by TEC To obtain a copy of your calibration certificate or for information about calibration services please complete the form found at https www acessystems com co...

Page 13: ...rison Analyzer Versions Analyzer Functions Cobra II Viper II Propeller Balance Main Rotor Track Balance Tail Rotor Balance Transient Balance Fan Turbine Balance Fan Blade Mapper Honeywell Performance when used with 1752B JEDA Direct Connect Transient Vibration Survey Vibration Spectrum Survey Overall Vibration Survey Monitor Spectrum Monitor Magnitude and Clock Monitor Magnitude and Phase Monitor ...

Page 14: ...s manual for details on creating reports The analyzer also has a USB port to allow you to transfer the vibration survey spectra and balance reports directly to a USB flash drive for storage review or printing Overall the analyzer is designed as lightweight portable units with accuracy and ease of use as primary design goals The subsequent chapters of this manual explain the functions and features ...

Page 15: ... functions to rapidly configure the analyzer based on the information contained in the Setup The term Job as used in this manual means the stored Setup information plus the collected balance vibration track and or spectral data and recorded corrective action taken if applicable to correct an undesirable condition In other words it is a record of the analyzer configuration acquired data computed da...

Page 16: ...m Tracker as used in this manual refers to the ACES Systems Model 550 TraXTM The term Forward Looking Aft abbreviated as FLA with regard to the perspective used to orient equipment during the setup or during the solution processes is also intended to mean Facing the propeller Looking At it when working on a pusher type propeller installation Revision History 2 15 2016 2 00 Major rewrite generalizi...

Page 17: ...il 2020 This chapter gives you a brief tour of the analyzer It describes the various keys and their functions the input and output ports and the standard accessories supplied with the analyzer Optional accessories are discussed later in the chapter ...

Page 18: ... will remain constant There is an additional Power off Timeout feature available that will power the analyzer off completely after a period of inactivity This feature is also described in Chapter 22 The Home key is used as a means to quickly return to the Main Menu the first menu that appears when the analyzer is powered on without the necessity of multiple steps The key may be used to escape scre...

Page 19: ...lay between Day and Night mode Day mode is enabled by default and makes the screen easier to see in daylight conditions Night mode is designed to increase the contrast between the background and text or graphics to make reading the display easier during dark conditions The OK key is pressed to accept data or a menu selection and set that selection into motion The key is used in survey and balance ...

Page 20: ...rapidly and then stop for two seconds The letter N should appear on the screen The BACKSPACE key is used to clear input in the current field When only the cursor is displayed this key will delete only the single character to the left of the cursor When an entire field is highlighted pressing this key can delete the entire contents of the field The four arrow keys UP DOWN LEFT and RIGHT are used to...

Page 21: ...r TFT display is how the analyzer communicates with the user The screen displays messages menus selection lists graphic illustrations and survey plots The display has an LED backlight with adjustable brightness and 800x480 resolution 2 3 Input and Output Ports 2 3 1 Top Panel The Viper II has nine input output ports on the top panel of the analyzer as shown in the figure below four CHANNEL vibrati...

Page 22: ... as the input for a single plane balance job The six pin connector enables the analyzer to provide sensor power as required to the sensor being used 2 3 1 2 TACH Ports The TACH inputs are three pin female receptacle connectors Both Gen II analyzers will accept either a raw tachometer speed reference signal or a Transistor Transistor Logic TTL level speed signal Power 12V is provided on one pin of ...

Page 23: ...tional input output ports are provided on the left panel of the analyzer They are the 18 28V DC IN and STRB JEDA ACCY Viper II or STRB ACCY Cobra II not pictured ports STRB JEDA ACCY 18 28V DC IN 2 3 2 1 STRB JEDA ACCY Port Viper II or STRB ACCY Port Cobra II not pictured This port is used for connection of a current and future accessories designed to work with the Gen II analyzers Both Gen II ana...

Page 24: ...s These ports can accept standard USB peripherals such as USB Memory Devices and Wired USB Keyboards It is designed to work with accessories with a direct wired connection between the analyzer and the device These ports are provided with a rubber plug to keep debris from entering the port 2 4 Additional Standard Equipment When you purchase a Gen II Analyzer several accessories come with the analyz...

Page 25: ...case with a mild soap solution and coat with an ARMOR ALL type protectant to preserve appearance ARMOR ALL is a registered trademark of the Clorox Company The case is designed to be airtight with the installation of an automatic purge valve The automatic operation of this valve will allow the pressure to equalize and ease the task of opening the case following rapid pressure changes 2 4 4 USB Memo...

Page 26: ...f this application many accessories are available that are too numerous to list concisely in this manual 2 5 1 USB Keyboard A USB Keyboard can be used to speed entry of data into the analyzer To use simply insert the USB connector into one of the two USB ports on the front panel The keyboard can be connected and disconnected as needed without powering down the analyzer Even with the USB keyboard c...

Page 27: ...ow keys to place the cursor in the desired field Press the key one time and the first character of the key should appear in the active field To generate the second character on a multi character key press the key twice rapidly and the second character should appear on the screen Repeat this process for each letter on the key with the number of times you press the key equivalent to the character s ...

Page 28: ... described in the previous section If you wish to change text already in place in these fields place the cursor in the field you wish to change then press the BACKSPACE key once for each character in the field you wish to remove and replace Use the and keys to move from field to field 3 1 3 Loading a Setup A Setup is a group of instructions defined by the user downloaded from the ACES web site or ...

Page 29: ...lick on the Technical Library link as shown below In the Technical Library page you may use the Filter Results drop down lists Simply click on the Bold Type headers and click in the checkbox es to narrow your search down until you see what you need in the results widow to the right To remove search criteria look at the top of the results grid and click the X for each item you no longer want ...

Page 30: ...pop up menu you can select the Save button and the E Setup will be saved in your Downloads folder by default Alternatively you can click the down arrow on the right side of the Save button and select Save As This will display the Save As pop up window allowing you to navigate to the location of the USB flash drive and save the E Setup in the aces_setups folder ...

Page 31: ...alyzer and insert it into a USB port on the computer When the device opens select the aces_export folder from the memory stick and open it Copy the necessary setup and paste a copy into the aces_setups folder Eject and remove the USB flash drive from the computer 3 1 3 3 Import Setups from USB drive Carry the USB flash drive to the Gen II Analyzer and plug into an open USB port on the front of the...

Page 32: ...r Management menu select Database Management Select Import Setups from USB Drive and press OK If an existing setup with the same name as the setup you are importing exists you will be asked if it is ok to overwrite this file Once complete you will be presented an Import Results screen as shown below ...

Page 33: ...d when the analyzer is turned on See the following figure From this menu you may access all functions of the analyzer by using the available menu choices Chapters 4 through 22 of this manual describes each Main Menu item selection the function of each item and the general steps necessary to perform each function The right hand portion of the screen contains a list of all of the jobs or tasks that ...

Page 34: ...ft hand portion of the display is separated from the majority of the display with a line The screen to the left of this line is reserved to display various status messages describing different states of the analyzer These status messages include the date and time the battery status including the presence of the battery charger and the presence of any reports stored in the analyzer s memory The amo...

Page 35: ... within a Main Menu Job function displays the Incomplete Jobs list Only jobs that are left unfinished will appear in the list and will be preceded by an I inside a box Using the key highlight the job you wish to complete from the list of incomplete jobs and press OK You will be taken to the last logical in process step completed in the job process NOTE If you did not enter information in the optio...

Page 36: ...hapter 3 Revision 2 10 April 20 3 4 3 Manage Jobs Selecting Manage Jobs from within a Main Menu Job function presents several sub menu choices as shown below These choices allow you to manage previously completed job data you have stored in the analyzer ...

Page 37: ...on screen viewing Incomplete jobs will be preceded by an I inside a square When viewing is complete press the F0 Back Up key to exit the screen The analyzer will then return you to the Manage Jobs menu screen to select another function 3 4 3 2 Create Report Selecting the Create Report option presents a list of stored jobs on the Create Job Report banner screen From this list you may create a repor...

Page 38: ...g the report the page number and status bar will update After the report is created the screen will change to indicate that the process is complete Also the left hand side of the screen Pending Reports value will increase with the addition of the new report which is now ready to transfer Press F5 Continue to complete the process and return to the Create Job Report to create your next report Contin...

Page 39: ...pending reports which will be transferred to the USB memory device then stored in the aces_reports folder of the USB memory device Whenever reports are pending the F1 Xfer Rpt button is visible as shown below Press the F1 Xfer Rpt key to transfer all pending reports to the USB device The analyzer will display the Transfer Reports screen and indicate the progress of the current transfer ...

Page 40: ...u move the USB memory device to a computer you can open or print the reports on the computer without the need for any additional software provided the computer has a PDF reader installed The reports will be located in the folder named aces_reports 3 4 3 3 Delete You can delete individual jobs or all of the jobs stored in the analyzer For example if you want to delete a Main Rotor balance job selec...

Page 41: ...st be presented with a list of available jobs After selecting the job you want to delete or when selecting to Delete All jobs you will be asked to confirm your selection Press either F1 Yes to continue with the deletion or F5 No if you determine you want to abort the process Once deleted they will NOT be able to be retrieved ...

Page 42: ...ecting the Export option presents a list of stored jobs on the Export Job to USB banner screen From the list you may choose a job to be exported directly to a USB flash drive The exported job file is saved in a tgz format and is currently used to aid ACES Product Support when assisting customers The selected job will be exported to the USB flash drive in the aces_export folder with the status bar ...

Page 43: ...ing the Gen II Analyzer Chapter 3 Revision 2 10 April 20 When the export is complete the screen will display the Operation Complete message Press the F5 Continue key to return to the Export Job to USB menu to export another job ...

Page 44: ... stored in the analyzer 3 4 4 1 Edit Selecting the Edit function displays the Setup List screen Select the setup you wish to edit and press OK The Edit Setup screen will be displayed giving you three options for editing a setup Select one of the following options and press OK Make a new setup based on this one This option allows you create a copy of the selected setup This is useful when the requi...

Page 45: ...e job function Setup screen Edit the setup as necessary and press OK to store and exit the edited setup screen Refer to the applicable paragraph in Chapters 4 through 15 for detailed instructions on how to complete edit the fields in the associated screen 3 4 4 2 New Selecting New will allow you to build a new setup After selecting New the screen will display the fields necessary for building the ...

Page 46: ...e report creation is complete the message Report created will appear In addition the Pending Reports value will increase by one indicating there is another report ready for transfer to the USB flash drive Press F5 Continue to return to the setup list You will be returned to the Create Setup Report list to create another report Refer to paragraph 3 4 3 2 1 for transfer instructions ...

Page 47: ...al setup for deletion After making your selection you will be asked to verify your intent to delete the selected setup by pressing the F1 key for Yes or the F5 key for No NOTE We highly recommend you create a report according to the instructions found in paragraph 3 4 4 3 above for reference or permanent record prior to deleting a setup Once deleted the setups cannot be retrieved from the analyzer...

Page 48: ...exported directly to a USB flash drive The exported setup file is saved in a tgz format and can be uploaded into another analyzer or used to aid ACES Product Support when assisting customers When the export is complete the screen will display the Operation Complete message Press the F5 Continue key to return to the Export Setup to USB menu to export another setup Files will be stored in the aces_e...

Page 49: ... it is strongly recommended that you format them with a FAT32 file system as described in Chapter 22 Analyzer Management The files located on your USB flash drive will vary but can include those folders shown below A brief description or the type of information stored in each folder is listed below 3 5 1 aces_db This location contains exported database information It is created when the analyzer c...

Page 50: ...ocation contains jobs that you want to import into the analyzer s memory You will manually copy files into this location for later import Files can be obtained from another analyzer or a previous export of the same analyzer 3 5 4 aces_reports This folder will contain all of the reports generated then exported by the analyzer These can be either Jobs Setups Calibration Setup Summaries or Job Summar...

Page 51: ...ion matches the analyzer and serial number into which the USB flash drive is plugged the menu items described in the license file will become active and visible on the analyzer s Main Menu To purchase additional options please contact ACES Systems as described in the Preface of this manual Revision History 11 9 2015 1 01 Added transfer reports to USB device to Section 3 4 3 2 to remove need to jum...

Page 52: ...own below Each of the listings on this banner screen menu is an option within the function Descriptions of each of these options follow along with the information required to complete the menu screens within the options and the steps necessary to perform the propeller balance function Viper II Cobra II Because most propeller balancing applications use common accessories ACES Systems has assembled ...

Page 53: ... operation 991D 1 Accelerometer Although the Gen II analyzers will support a full range of vibration sensors the 991D 1 accelerometer see the illustration below was selected as the standard for use with the propeller balance kit due to its rugged construction accuracy cost and range of operation A single sensor is supplied with the propeller balancing kit Additional sensors may be purchased separa...

Page 54: ... Phototach an ACES Systems LASETACH or an interface for optional speed sensors such as a magnetic pickup or pulse generator The cable is a three wire shielded cable insulated in a bright yellow petroleum resistant jacket Attached to one end of the cable is a female three pin bulkhead type socket connector On the opposite end of the cable is a male three pin quarter turn locking MS connector The co...

Page 55: ... to the vibration sensor or reflective tape both methods are described in more detail below Using the Propeller Protractor For correct use of the protractor when measuring relative to the vibration sensor do the following WARNING Always ensure mag switches are off prior to any movement of the propeller Rotate the propeller until the reflective tape is directly in front of the Phototach With the pr...

Page 56: ...l opposed engine Attach the adapter nut end to the exposed case bolt threads then slide the right angle mount over the stud end and secure with the supplied nut Two sets of the adapters are required for dual engine balancing Tackle Box A multi compartment high impact plastic tackle box is included with the propeller balancing kit The box has ample storage space for vibration sensors vibration sens...

Page 57: ...d performance under varied operating conditions Using a lower quality tape will cause inaccurate tachometer readings or unreliable phase information The tape is manufactured by the 3M Company and is the only tape we recommend for use with the system Contact ACES Systems for replacement tape See Chapter 23 Equipment and Accessory Setup and Troubleshooting for additional information for high RPM ACE...

Page 58: ...rting a new job with no setups previously defined in the analyzer s memory 2 starting a new job with previously defined setups available in the analyzer s memory or 3 resuming an incomplete job being held in the analyzer s memory If you are starting a new job with no setups previously defined in the analyzer s memory the screen will automatically display the Prop Balance Setup banner screen shown ...

Page 59: ...The actual setup names will be those which you have entered into your analyzer If you are resuming an incomplete job being held in the analyzer s memory the opportunity to do so is presented immediately following the Start Job selection The screen displays the message as shown below If you press the F1 Yes key the analyzer will return you to the last logical in progress step of the job If you pres...

Page 60: ...g data 4 1 1 1 Propeller Balance Setup Screen To complete the Prop Balance Setup banner screen as shown below do the following 4 1 1 1 1 In the Name field enter a name for this setup using the keypad Refer to Chapter 3 Using the Gen II Analyzer if you are unfamiliar with using the keypad The name you choose will aid you in differentiating this setup from other stored setups should you choose to re...

Page 61: ...ined locations or holes where trim balance weights can be added If you select Yes a page for defining the angle of each hole will be provided The No answer indicates that no predetermined locations are available and that you will be drilling holes for the permanent mounting of the final trim balance weights 4 1 1 1 8 When 2 Engs are selected in step 4 1 1 1 3 AND Yes is selected in step 4 1 1 1 7 ...

Page 62: ...r as viewed standing Forward of the propeller Looking Aft FLA toward the tail of the airplane 4 1 1 1 14 Using the key move to the Tach Type field Using the key select the type of tachometer you are using Tach Type selections for this field include Optical Includes the Phototach and LASETACH This selection will provide power to the Tach device Mag P U A magnetic pickup This selection does not prov...

Page 63: ... D according to which of the analyzer s input channels you intend to use The default for single sensor input is Channel A Use the key to make the selection If you are conducting a two sensor balance choose A B or C D 4 1 1 1 21 Move to the next field Sens Chan for Eng 2 using the key Select sensor channel A B C D A B or C D according to which of the analyzer s input channels you intend to use The ...

Page 64: ... all fields set at 0 and press the F0 Back Up key This sets the ICF at the default for the known conditions The ICF default value is added automatically when the Setup is created The user may press this key at any time to reset the ICF to default When satisfied with the displayed ICF press OK to return to the Prop Balance Setup banner screen 4 1 1 2 2 Making any changes on this screen will toggle ...

Page 65: ...ve the F3 key Pressing the F3 key will display additional function key options giving you the option to press F1 Avg Def to set the averaged ICF to the default ICF pressing F2 Def by HP to return the ICF to its default value which is defined by the horsepower rating entered in paragraph 4 1 1 1 2 above Pressing the F3 View Avg key will return the screen to display the Updated ICF ...

Page 66: ...his setup in paragraph 4 1 1 1 199 above 4 1 1 3 1 This is an information only screen for use in verifying the parameters of the vibration sensor you have chosen You may not edit or otherwise enter information on this screen If this sensor does not possess the specifications you require for this setup you may enter a new sensor in the Sensor Setup screen or choose another sensor from the existing ...

Page 67: ...following 4 1 1 4 2 Use the key to move to the No of Holes field Enter the number of holes that correspond to the total number of trim weight mounting locations The valid range of values for this field is 1 to 36 4 1 1 4 3 Move to the Space field using the key and then use the key to select Even or Uneven from the available selections Even indicates that all trim weight mounting locations are even...

Page 68: ...f hole number 1 as viewed from the front of the engine looking aft To determine this angle do the following With mag switches OFF rotate the propeller so the tachometer triggering device magnetic interrupter reflective tape etc is at top dead center With the propeller in this position use the 12 00 position as the 0 or 360 degrees index point and measure opposite the direction of rotation to the a...

Page 69: ... of each hole number and record that angle adjacent to the hole number See the example Prop Hole Layout Setup screen shown at the beginning of the section For example if the number 1 hole is near the 6 00 position the angle may be measured as 174 degrees On the screen use the keypad to enter the angle of hole number 1 as 174 per the example Then using the key to move to the adjacent field No input...

Page 70: ... Depending on whether or not you made use of predetermined hole locations you may have also defined values for a number of trim weight mounting holes If these steps have been completed then the Job Identification banner screen will be displayed Job information is optional but will appear on the job report if entered and will assist you in identifying this job when stored in memory Complete the inf...

Page 71: ...formation screen will be displayed Information on this screen is optional but will appear on the job report if entered The function keys across the bottom of the screen will appear after an entry in a previous job has been made in the corresponding field Pressing the function key below the name will take you to a listing of previous entries in that field This list can be used as a shortcut when si...

Page 72: ...e target blade will produce the best results Connect the tachometer cable to the Phototach connector Route the cable away from hot areas and electrical equipment back to the cockpit and attach to the tach channel specified in the setup you are using Secure the cable along its route with duct tape or tie wraps Near the bottom of the analyzer screen ensure that the message Tach Power is On is displa...

Page 73: ...otach illuminate and extinguish as the tape crosses the beam This indicates the position of the tape is correct Remove the tape backing and attach the reflective tape to the propeller at that location Be sure to smooth out any wrinkles or bubbles in the tape Ensure the edges are smoothed and firmly attached Recheck the previous step to ensure proper placement Connect the vibration sensor cable to ...

Page 74: ...banner screen shown above with the statement to Perform a FOD check and start engine s per flight manual Start the engines and establish normal operating conditions When normal operating conditions are established press OK to continue 4 1 6 Acquiring Data The Set Engine Speed banner screen is displayed At the top left of the screen the run number and engine number if balancing two engines is displ...

Page 75: ...d the values outlined in Chapter 24 paragraph 24 2 5 RPM Warnings Once you have reached your target RPM press OK to continue The screen changes to display the Run x banner screen See the figure below The converging vibration indicator shows the average amplitude See Chapter 24 Reading Spectrum and Scales for information on how to read the data contained on this screen The current and average frequ...

Page 76: ...ar when a minimum number of consistent samples have been collected and it is ok to stop data acquisition If you are conducting a two 2 engine balance this process will be repeated for the second engine 4 1 7 Review Job When you are finished acquiring data the Review Job banner screen shown below is displayed next The amplitude and phase Mag DEG are displayed for each engine and each sensor input c...

Page 77: ...F3 Retake All key if balancing two engines This option returns you to the Set Engine Speed banner screen see paragraph 4 1 6 above The data can be viewed in a polar chart format by pressing the F4 Polar key Pressing the F4 Review key will return you to the Review Job screen An information screen will appear prompting you to Shut down the engine s per manual instructions Press the F5 Continue key t...

Page 78: ...in on for the data collection phase of the job on the first run This option will only be available if Holes field was selected to Yes If the previous trim balance weights were left on press the F1 Yes key This will produce the List Run 1 Existing Weights screen as shown below Enter the total amount of weight in grams that is installed at each hole location in the Grams column Using the key enter i...

Page 79: ...Balance Solution banner screen will be displayed as described in paragraph 4 1 8 1 below If the Holes field was set to Yes the Prop Suggested Installed Weights banner screen will be displayed as described in paragraph 4 1 8 3 below 4 1 8 1 Prop Suggested Installed Weights banner screen The screen is identified at the top left as being Run 1 Eng 1 Vibration amplitude and phase angle are displayed f...

Page 80: ... installed weight be totally replaced In some cases this may mean removing and reapplying weight at the same or near the same location Failure to remove previously installed weight prior to applying the new solution weight will result in failure of the propeller balance function The next line of text states Enter Actual Weight Installed In the weight and angle fields directly below this line enter...

Page 81: ...ne on each side of the 270 degree location and enter them in the two fields Use the key to move between the fields Press OK to continue The screen displays the Record Split Weights banner screen like the one shown below The New Solution is given for the two new angles you specified as available for weight application Match the new weight solution as near as possible to the recommended solution and...

Page 82: ...ted and Installed In the example screen shown above the Suggested solution is 20 4 180 which means the analyzer suggests 20 4 grams g of weight at 180 degrees from the index point see Page 4 4 on how to use the Propeller Protractor to locate the phase angle Below this solution are the calculated weight placements for each identified hole location These fields cannot be edited The Installed solutio...

Page 83: ...vious run must be removed The remove weight message will be repeated for every run and solution Each new solution dictates that the previously applied solution installed weight be totally replaced In some cases this may mean removing and reapplying weight at the same or near the same location Failure to remove previously installed weight prior to applying the new solution weight will result in fai...

Page 84: ...ow you to complete 6 runs in attempts to balance If the balance job is not completed by the sixth run you should suspect possible problems with your technique or mechanical faults with the engine and or propeller assembly Mechanical faults may also be indicated by drastic changes in suggested weight or angle from one solution to the next 4 1 9 Vibration Summary The Vibration Summary screen will ap...

Page 85: ...r when balancing without predetermined hole locations as explained in Paragraph 4 5 below The selection field below the Current Vibration line allows you to use the or keys to select a next action for each engine individually The possible selections are Do Verify Run which will validate the final added solution Cont Balance which allows you to attempt to improve the Current Vibration level even if...

Page 86: ...sume Job The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 4 3 Manage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 87: ...ause of this they are contained in Chapter 3 Using the Gen II Analyzer 4 5 Weight Calculator CAUTION If test weights were used on the spinner they must be removed before installing any permanent weights The test weights will be replaced by the weight suggested in the analyzer to compensate for the change in arm of the permanent installation location ...

Page 88: ...lt of pressing the Wt Calc key on the Vibration Summary screen In the Solution Angle line enter the angle of the installed test weight Use the same method that you used for placing the test weight This field will be automatically filled in if the weight calculator was activated as a result of pressing the Wt Calc key on the Vibration Summary screen This value will take into account the effective a...

Page 89: ...tion solution in this case 80 Grams 189 degrees is displayed at the top of the screen The next line states Enter New Location Use the keypad to complete the next two fields Angle 1 and Angle 2 Locate the two available weight installation locations one on each side of the 189 degree location and enter them in the two fields Use the key to move between the fields Press OK to continue The Permanent W...

Page 90: ...iew Main Polar view explanation in Chapter 24 Lucas 2 17 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 10 24 18 2 1 Major Rewrite for the addition of Dual Prop Balancing in SP5 Justice 4 1 2020 2 2 Rewrite for UI changes for SP7 Added Screen Shots and Verbiage refl...

Page 91: ...Chapter 5 RESERVED Revision 1 00 Dec 2014 ...

Page 92: ...Chapter 6 RESERVED Revision 1 00 Dec 2014 ...

Page 93: ...st by looking at each of the chart forms found in the main rotor section then by using these forms to create an actual setup 7 1 Main Rotor Setup This section covers the complete setup process in the Gen II Analyzer for the main rotor balance functions The following paragraphs illustrate each of the screens necessary to define and store an enhanced main rotor setup 7 1 1 Main Rotor Setup Screen ...

Page 94: ... analyzer The value selected for this field determines which analyzer channel will be used to measure and display the vertical vibration 7 1 1 3 Use the key to move to the Lateral Chan field Use the key to toggle between the selections in this field either A B C D A B or None as allowed by the selections in the analyzer The value selected for this field determines which analyzer channel will be us...

Page 95: ...will allow data collection at less than the RPM chosen in the setup Example This feature would be set to NO when an aircraft requires data collection at both 70 NR and 102 NR 7 1 1 12 Press the key and move to the Trk Units Use the key to select the desired unit of measure to be used by the analyzer when presenting tracking data Selectable options are either inches or millimeters For more informat...

Page 96: ...l device specific instructions can be found in the Model 550 TraXTM Operational Supplement ACES P N 75 900 4043 7 1 2 1 In the Rotor Diameter block use the keypad to enter a number between 1 00 and 999 00 to include a decimal point 7 1 2 2 Press the key to proceed to the unit label field This is the unit of measure used to identify the diameter described in the above block The available choices ar...

Page 97: ...mber between 30 and 90 degrees 7 1 2 7 Tracking Planes information is only visible if four or more even number blades are selected in the Main Rotor Setup page This field is used to designate the number of planes in which the main rotor blades fly If all blades fly in the same plane select 1 If there are two distinct planes for the blade path select 2 Use the key to enter the Tracking Planes confi...

Page 98: ...er is entered in an ID field the setup will require an electronic chart be defined and will result in corrections being given for that measurement vs condition o If the same ID number is given to more than one condition for the same measurement type the data for each of the conditions will be averaged together and a solution presented for the average o Different adjustment types for example PCL an...

Page 99: ...nalyzer to present solutions Track splits must be 0 25 inches 6 35mm or greater for the analyzer to present a solution 7 1 3 1 Conditions Setup Screen Example 2 In the example main rotor condition setup screen above only one vertical chart ID one lateral chart ID and one tracking adjustment ID have been entered Based on the ID numbers entered all of the vertical measurements for Hover FLT 80 and F...

Page 100: ...sed on this average The recorded track split for FLT 80 and FLT 120 will also be averaged with a second solution based on this average This is an example of a setup for use on an aircraft that requires pitch change link adjustment for ground and hover visual track then trim tab adjustment based on visual track in forward flight When you have completed the conditions setup screen press OK to accept...

Page 101: ...each of the movement types Weight Weight adjustments should always be entered as the addition of weight Sweep Select FWD or AFT for the direction of blade movement if adjusting lateral balance using sweep in accordance with a polar chart If the aircraft does not utilize blade sweep for lateral balance this field is not applicable Blade Select UP or DOWN for the direction of blade movement if adjus...

Page 102: ...22 3 2 Analyzer Version Information When completed press OK 7 1 5 Chart Definition The final step in the setup process is to define the electronic chart forms as described in paragraph 7 7 below Analyzer Chart Forms Vertical chart s will be defined first followed by the lateral chart s then any track adjustment influences required When all charts have been completed press OK to save the setup and ...

Page 103: ...Gen II User Manual 7 11 Main Rotor Track Balance Chapter 7 Revision 3 00 Apr 2020 Rotor diameter 37 0 Feet Lead lag units are read in inches Rotor speed 385 RPM ...

Page 104: ...channel B The type of vibration sensor chosen for this setup is the 991D 1 The type of tachometer source for this setup is the Mag P U The tachometer channel for this setup is channel 1 Number of weight positions available 4 Target Blank sweep Target Blank weight The main rotor is a two bladed system Tracking will be displayed relative to blade number 1 Rotor speed is 385 RPM RPM Check function se...

Page 105: ...ibration will be measured and recorded for this setup Press OK to proceed to the next screen 7 1 6 2 Tracking Setup Screen Enter 37 00 in the first block using the keypad Select ft for units of rotor diameter Select in for the display units of lead lag data Enter 0 Degrees for the Blade 1 Offset Enter 121 00 for the Inches to Mast CL Enter 45 Degrees for the Tracker Inclination Enter Green Blue fo...

Page 106: ... and FLT120 One lateral chart has been identified for the lateral measurement in Hover only The vibration Target for Vertical measurements has been set at 0 20 IPS for Ground and Hover and set at 0 10 IPS for 80 120 KTS The Vibration Target for Lateral measurements has been set at 0 35 IPS for Ground 0 15 IPS for Hover and 0 10 for FLT 80 120KTS The Track split target is set at 0 40 inch for Groun...

Page 107: ...de FWD moving a blade UP using either pitch change links or tabs The solution logic has been set to MAX and will present the solution related to the highest vibration readings attained for the vertical and lateral sensors Press OK to continue 7 1 6 5 Vertical Hover Chart Definition The Vert HOVER chart setup screen appears first Use the vertical vibration chart in paragraph 7 1 6 to complete the s...

Page 108: ... left as None Max ICF Update is 50 Rotation is 45 degrees The type of adjustment applied in accordance with this chart is pitch change link in flats therefore FLT has been entered The influence co efficient for the pitch change links is 5 0 flats per 1 0 IPS vibration The Bld Pos names entered from the chart are TARGET and BLANK The MoveLine for moving the TARGET blade up is 12 45 The MoveLine for...

Page 109: ...le The chart type is Regular This chart uses no sweep adjustments and is therefore left as No No Adjustment Blade Pos is left as None Max ICF Update is 50 Rotation is 45 degrees The type of adjustment applied in accordance with this chart is trim tab in degrees therefore DEG has been entered The influence co efficient for trim tab adjustment is 10 0 degrees per 1 0 IPS vibration The Bld Pos names ...

Page 110: ...ze a sweep adjustment for balancing it is not the only type of adjustment used and therefore requires this entry to be left set as No No Adjustment Blade Pos is left as None Max ICF Update is 50 Rotation is 45 degrees The first Bld Pos name entered is TARGET utilizing an adjustment unit of GMS weight The influence co efficient for this point is 200 00 grams adjustment per 1 0 IPS vibration The Mov...

Page 111: ...ts adjustment per 1 0 IPS vibration The Move line for this position is 5 30 When completed press OK to save and exit this setup 7 2 Main Rotor Balance Process The following paragraphs present the main rotor track and balance process and its associated screens and are intended to familiarize the user with the data acquisition and correction capabilities of the Gen II Analyzer Prior to starting a ne...

Page 112: ...fining a setup If you have previously saved setups stored in the analyzer s memory a screen displaying the list of setups will be displayed You can then select a setup from this list to use for the job Proceed to paragraph 7 2 2 Setup List If another job was already in progress but not completed the Incomplete Job banner screen will be displayed and the analyzer will present a message prompting yo...

Page 113: ... OK If the setup you need is not present press the F1 New key to proceed to the Main Rotor Setup screen to define a new setup Use the F2 key to view detailed information about the setup Job Identification The Job Identification banner screen appears next allowing entry of the customer name aircraft registration and total time This information is optional but it is suggested that at least a custome...

Page 114: ...t use the vibration sensor installation locations as specified by the applicable polar charts The orientation of the sensor is key to the accuracy of the chart if the sensor is installed in a direction other than that specified the phase clock angles will be incorrect and solutions will not be accurate If you are using a magnetic pickup for the speed sensor install and set the gap as directed in t...

Page 115: ... the vibration results from the first applied correction While still in the Connect Sensors banner screen a message is presented near the bottom that reads Tach Power is On The Block directly below this statement and corresponding to the F1 key is labeled Tach Pwr Pressing the F1 Tach Pwr key will power off the Tach Turning the tachometer power on is not required to start the balance job this step...

Page 116: ... the current run and direct you to shut down the aircraft 0 If during the current run the F2 Adjust key becomes visible the analyzer has collected enough information to present a solution The solution presented will depend on the conditions measured and the charts defined in the setup For example in our sample setup paragraph 7 1 6 3 we defined only two charts for use with the aircraft in a hover ...

Page 117: ...s high When the amplitude reaches a lower level Approx 0 05 IPS the error value may remain high This is a normal response and is not cause for alarm Press the F1 Reset key to restart the measurement and averaging process for vibration and track at any time This may be performed as a means of validating the quality of a measurement If after the Reset key is pressed the average measurement does not ...

Page 118: ...rrent run Always observe the run number and condition name at top of the screen to identify the data you are viewing This screen also offers a chance to retake the measurements Press the F1 Retake All to retake the measurements Vibration data and Track data Press the F2 Retake Vib to restart the measurements for Vibration only Press the F3 Retake Trk to restart the measurements for Track only When...

Page 119: ...next solution will be the best course of action The analyzer will present all of the solutions that are possible from the data gathered for the current run This means that it is possible for the analyzer to give two adjustments that would adversely affect the other The user will ultimately be responsible for determining which adjustments to make and which to discard For instance the analyzer can r...

Page 120: ...be applied is LFL or Lateral Flats of a damper sweep The line at the bottom of the screen serves as a reminder that a positive suggested solution equals adding weight Sweep Aft Blade pitch link up and Tab up For this measurement the analyzer s recommended adjustment is to adjust the Yellow blade by 0 06 flats and the Green blade 4 88 flats If you are able to make this adjustment exactly as entered...

Page 121: ... close the job and not allow resuming at a later time If you wish to stop the job temporarily press the Main Menu key or simply turn the analyzer off When you have finished entering the adjustments performed press OK to proceed to the Run 2 Select Condition Screen 7 2 7 2 Example Solution Screen 2 The second solution the analyzer gave for our sample job is for the Vertical 80 KTS 130KTS pitch link...

Page 122: ...responsibility to adjust the amount either up or down to achieve a quantifiable adjustment Remember that the analyzer will update the influence co efficient between every run based on the vibration results from the previous adjustment Once the adjustment has been made press OK proceed to the Run 2 Select Condition Screen Repeat the data acquisition and solution application process to verify the ad...

Page 123: ... efficient for the job The following paragraphs will describe these new screens and how to navigate through them to review this information 7 3 1 Main Rotor Review Job Upon selecting to review a job the Review Job screen will appear as shown above The run number and condition name are displayed at the top of the screen along with the vibration and track measurements acquired for the current run an...

Page 124: ...ditional navigation instructions for the Polar Chart view 7 3 2 View Main Rotor Track and Balance The View Main Rotor Track and Balance screen appears as shown above This screen presents both the suggested and installed adjustments for the run number and chart name displayed Press either the or keys to view different chart types for the same run Press the or key to change the current run Press the...

Page 125: ...tment ratio of each blade position Pressing the or keys will toggle between multiple chart types if more than one is defined for the setup Press the F1 key to ViewMeas and return to paragraph 7 3 1 Press the F2 key to ViewAdj and return to paragraph 7 3 2 Press the F5 key to view the ICF changes recorded during the job as shown in paragraph 7 3 4 When completed reviewing press OK to return to the ...

Page 126: ...Chart ICFs screen shows how the influence coefficient magnitude and rotation was changed as a result of the correction made on each run Because the analyzer continues to learn between runs it is very important to ensure accurate data entry for the actual correction made during each run Press OK to return to the Review Job screen ...

Page 127: ...4 Resume Job The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 7 5 Manage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 128: ...oggle between Regular and Irregular in the Chart Type field then pressing the key to move to the next field The remaining fields in the screen will automatically change if necessary The tracking influence setup screen is separate from the chart forms and allows entry of the amount of adjustment required to move the blade a specified distance The paragraphs below describe these forms in detail 7 7 ...

Page 129: ...weight positions have the same ICF and type of adjustment and all move lines are equally spaced around the chart Using this chart follow the example below to properly define a Regular main rotor chart setup in the analyzer Name The name of the chart will be automatically inserted from the Main Rotor Condition Setup screen and is not editable Chart Type Using the or key select the chart type For th...

Page 130: ...r to be placed in the setup Adj Unit Using the keypad enter a three letter designator for the type of adjustment utilized by the chart In this case PLT has been entered to represent plates The designator used in this screen will also be used when the analyzer recommends a solution Adj IPS Using the keypad enter the influence from the chart This is the amount of adjustment required to reduce a one ...

Page 131: ...n rotor balance chart shown to the right presents two different types of adjustments the addition of weight to target or blank and sweeping either the target or blank blade aft The ICF is different for each set of adjustments 220 grams of weight per 1 0 IPS and 2 points of aft sweep per 1 0 IPS The move lines for these adjustments are equally spaced however because the ICF and adjustment types are...

Page 132: ... uses 45 degrees With 45 degrees selected any move line that falls more than 45 degrees outside of the expected vector for a given adjustment and the analyzer will not update the ICF Using the keypad enter the desired parameter to be placed in the setup BLD Pos UNIT ADJ IPS and MoveLn Starting with any of the correction points on the chart enter up to six characters for the blade position name in ...

Page 133: ... used to move a blade 1 0 unit of measure at the condition listed Conditions The condition name will be automatically entered and is not editable Adjustment Name Using the keypad enter a three character identifier for the adjustment type Example PCL Pitch Change Link SWP Sweep WGT Weight and TAB Tab Unit Using the keypad enter a three character identifier for the unit of adjustment type Example FL...

Page 134: ...o a particular blade during a track and balance job An optimized solution is provided by the analyzer that requires no adjustments to the designated No Adjustment Blade Press OK to save the setup Revision History 3 10 2015 1 01 Updated broken reference links and added revision history table Moved Analyzer Chart Forms section from 7 1 to 7 7 Berlin 11 9 2015 1 02 Added text about the Polar Chart vi...

Page 135: ...each of the chart forms found in the tail rotor section then by using these forms to create an actual setup 8 1 Tail Rotor Setup The following paragraphs illustrate each of the screens necessary to define and store a tail rotor setup 8 1 1 Tail Rotor Setup Screen Use the following screen capture and polar chart to follow the steps below to complete the tail rotor setup screen for Example 1 as show...

Page 136: ... using the key Press the key to move to the Tach Position field Using the key select the tachometer position in hours for the majority of aircraft enter 12 o clock regardless of the actual clock position of the PhotoTach once installed For further guidance contact Aces Support at support acesystems com Press to move to the Balancing RPM field Using the keypad enter the tail rotor RPM balance speed...

Page 137: ...ay be used for balancing the tail rotor you may enter it in this block This is the total amount of balance weight allowable not the limit of each balance position If the Installed Weights for a single run is more than the maximum allowed the user will encounter a warning screen to notify him that the maximum weight limit is being exceeded Press the key to proceed to the Vib Target IPS field Enter ...

Page 138: ...tion as 5 0 grams adjustment per 1 0 IPS vibration and the move line of 10 00 using the keypad Press the key and enter the third weight position name of BLANK Using the key to change fields enter the influence co efficient for this location as 0 60 grams adjustment per 1 0 IPS vibration and the move line of 11 45 using the keypad Press the key and enter the fourth weight position name of B Using t...

Page 139: ...utlined in paragraph 8 1 1 to complete the Tail Rotor Setup screen as shown in the screenshot above When finished with the main setup screen press OK 8 2 2 Tail Rotor Condition Setup Screen The name for the first condition will be labeled 1 Use the keypad to change to the desired condition name Press the key and assign the chart ID ...

Page 140: ...ng names and chart IDs until all conditions are defined Press the key and if there is more than one chart ID specified the Soln toggle field will appear The three choices are All Max and LSQ Least Mean Square o If All is selected the analyzer will present a solution for each of the charts o If Max is selected the analyzer will present a single solution for the condition that recorded the highest v...

Page 141: ...C A B Target The Tail Rotor Chart Setup screen for the first condition 80 appears next Using the tail rotor polar chart above fill in the appropriate information as follows The name for the chart 80 has already been inserted from the Tail Rotor Condition Setup screen Press the key and select the chart type by pressing the key The type of chart for this example is Regular Press the key and enter th...

Page 142: ...TARGET blade as 12 00 Press the key and enter the second weight position name of A Press the key and enter the Add move line for weight placement on the A blade as 3 00 Press the key and enter the next blade name as B Press the key and enter the last blade name as C Press OK to continue to the next chart 8 2 4 Second Condition Tail Rotor Chart Setup Screen The Tail Rotor Chart Setup screen for the...

Page 143: ...e key and enter the number of weight positions using the keypad This example uses 4 weight positions Press the key to enter the grams per IPS influence for the tail rotor This example uses 100 00 grams Press the key and enter the first weight position name as TARGET Press the key and enter the Add move line for weight placement on the TARGET blade as 3 00 Press the key and enter the second weight ...

Page 144: ...the user with the data acquisition and correction capabilities of the Gen II analyzers Prior to starting a new tail rotor balance job you must first select the Tail Rotor Balance option from the main menu by using the key and press OK 8 3 1 Starting a New Job Selecting Start Job from the Tail Rotor Balance banner screen allows you to begin a tail rotor balance job When you select this option one o...

Page 145: ... analyzer will present a message prompting you to verify that you wish to finish the incomplete job or begin a new job The screen will display the message The last job performed is incomplete Do you want to RESUME work on it If you wish to return to the unfinished job press the F1 Yes key and you will be returned to the point where the in progress job was stopped and allowed to complete it If you ...

Page 146: ...information is optional but it is suggested that at least a customer name be entered as it will aid in identifying the job for future use If the analyzer has been used previously a list of customer names and or A C Reg numbers will have been stored and are accessed by pressing the F1 Cust or F2 A C Reg keys respectively A name can then be selected from this list for use with this job When finished...

Page 147: ...to the accuracy of the chart If the sensor is installed in a direction other than that specified the phase clock angle will be incorrect and any solution will not be accurate Tach Power need not be ON before leaving this screen The option simply exists for installing and checking alignment of the reflective tape and PhotoTach When completed press OK 8 3 5 Start Aircraft The Start Aircraft screen a...

Page 148: ...quire data This screen will only appear in Multiple Condition balance runs In a single condition run the next screen to appear is the Data Acquisition screen proceed to paragraph 8 3 7 Use the key to highlight the proper condition and press OK to begin gathering data for that condition 8 3 7 Data Acquisition The data acquisition screen will appear next displaying the current and averaged rotor spe...

Page 149: ...s long as the error continues to decrease This will insure you have the most accurate data possible Use the OK key to exit this screen and store the reading The text below the Current heading indicates the RPM IPS and Clock Angle from the latest collect vibration sample These values will change as the individual readings are collected The RPM will be the currently recorded speed value For Run 1 th...

Page 150: ...a has been collected at all of the conditions the condition boxes will have X s showing that data has been collected After data has been collected press the F1 End Run key to review the prior measurements 8 3 8 Review Prior Run s Data The Review Prior Run s Data screen appears This will allow you to review the data just acquired as well as all prior run data if any has been taken If you wish to re...

Page 151: ...inished reviewing press OK to continue to the solution process 8 3 9 Shut Down Engines A screen directing you to shut down the engine s will appear next You can use the F0 Back Up key to return to the prior screen Shut down and press F5 Continue to proceed 8 3 10 Tail Rotor Maximum Weight Warning The next screen will present a reminder about the maximum weight allowed on the tail rotor as defined ...

Page 152: ...It is extremely important that these changes are entered as they will be used to update the influence co efficient for the next run Use the keypad to enter changes If weight is removed from a location use the negative symbol when entering the adjustment performed Pressing the F0 Back Up key will return you to the prior screen This will allow you to retake the vibration reading Pressing the F1 Sugg...

Page 153: ...he tail rotor or the suggested weights are smaller than the minimum hole weight For instance in the example below the attaching nut and bolt weigh 3 9 grams This is larger than either of the suggested weights In this case press the F3 Re Solve key and follow the instructions below Using the keypad record the actual weight s installed between runs and their location If you choose to remove weight f...

Page 154: ...weigh 3 9 grams To re solve the solution simply compensating for the minimum hole weight press OK to display the new solution If there are existing weights on the tail rotor continue below to obtain the solution optimized for both the weight removal and the minimum hole weight requirements The example below shows the procedure for removing any weights already installed on the tail rotor After ente...

Page 155: ...low Run 1 Suggestion will be the minimum weight required in the minimum number of holes allowing for the attaching hardware These weights may not be in adjacent holes This is necessary to provide the weight influence at the optimum location on the tail rotor Every attempt should be made to match the suggested weight value If it is not possible to match the suggestion exactly match the weight as cl...

Page 156: ...ed with the Balance Status screen shown below Press F1 Quit Job to mark the job as complete without the option for resuming the job at a later time Pressing F1 will return you to the Main Menu Choosing F5 Continue will allow you to continue the job in order to attempt to reduce the vibration further below the Limit Target entered in the setup 8 4 Tail Rotor Manage Data Functions The tail rotor Rev...

Page 157: ...ggested as well as the installed corrections to the rotor To view a different run number press the or keys To view the chart information for the job press the F1 Chart key and refer to paragraph 8 4 2 Pressing the F3 key Polar will present a Polar Chart view of the data collected 8 4 2 View Tail Rotor Chart The View T R Chart screen consists of multiple parts the first shows the chart name chart t...

Page 158: ...m Any additional charts will have similar screens to view Pressing F5 Continue will progress through all available screens for all conditions When returned to the View T R Balance screen paragraph 8 4 1 press OK to return to the Manage Data screen 8 5 Resume Job The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 159: ...nage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 8 7 Manage Setups The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 160: ...ons spaced equally around the chart all adjustments are of the same type and all adjustments carry the same ICF The next paragraph details the process for defining a tail rotor Regular chart setup Regular Tail Rotor Chart Setup The tail rotor balance chart shown to the right depicts six adjustment points Each adjustment point has been circled to ease identification and differentiate them from the ...

Page 161: ...f the chart uses an adjustment type such as the number of washers per IPS simply enter this number and overlook the label of grams WtPos Add The lower portion of the screen provides fields for entry of the WtPos names and Add move line clock angles Since this is a Regular chart setup you will only have to enter the move lines for the first two weight positions The analyzer will determine the rest ...

Page 162: ...Target and Blank have an ICF of 10 grams per 1 0 IPS where A and B have an ICF of 33 grams per 1 0 IPS The clock angle move lines are not equally spaced around the chart therefore it must use the Irregular chart form in the analyzer Using this chart follow the examples below to properly define an Irregular tail rotor chart setup in the analyzer Name The name of the chart will be automatically inse...

Page 163: ...ss the key to move to the Add field Enter the clock angle move line for this point For the TARGET weight position the move line is 6 00 Perform this for each adjustment point shown on the chart to complete the setup Note Weight position names must be entered sequentially in either clockwise or counterclockwise order It does not matter what direction is chosen Revision History 3 12 2015 1 01 Moved ...

Page 164: ...ion Descriptions of each of these options follow along with the information required to complete the menu screens within the options and the steps necessary to perform the balance function 9 1 Create Setup Selecting Start Job from the Transient Balance banner screen allows you to begin a new transient balance job When you select this option one of three screens will appear depending on whether you...

Page 165: ...to resume it Pressing the F1 Yes key will return you to the last logical in progress step of the job Pressing the F5 No key will proceed as described in the two examples below depending on your circumstances Select Setup List If you are starting a new job with previously defined setups available in the analyzer s memory the screen will automatically display the Select Setup List banner screen simi...

Page 166: ...the Transient Balance Setup banner screen shown below See paragraph 9 1 1 below for step by step instructions on completing the Transient Balance Setup 9 1 1 Transient Balance Setup 9 1 1 1 The Transient Balance Setup banner screen allows you to define and store a Transient Balance Setup using both fill in and selection fields The fill in fields have squared off ends These fields are filled in usi...

Page 167: ...me you choose will aid you in differentiating this setup from other stored setups should you choose to use or review it at a later time The name should be one of your choosing which will be easily recognized and associated with this setup such as Citation 10 Lear 45 or CF34 3A 9 1 1 4 Using the key move down to the Eng Rotation field Use the to select the direction of engine rotation The choices i...

Page 168: ...r rather than a specific class weight by name 9 1 1 9 If you selected Class or Both in the Balance Wt Type field the Num Class Wt Sets field will be available Using the key move to the Num Class Wt Sets field Use the key to select the total number of class weight sets available for use on this engine If you choose a number here be prepared to define each class weight on a following screen 9 1 1 10...

Page 169: ...t vibration measurements 9 1 1 14 Move to the Min Baln RPM minimum balancing speed field by using the key Enter the minimum speed in RPM that may be used for this balance setup The value entered here must be equal to or greater than 20 of the value entered in the Actual RPM 100 field Para 9 1 1 15 below If the entered value is less than 20 and you press OK an error message will appear providing th...

Page 170: ...e Phototach and Lasetach The available selections are Optical Mag P U Mod Tth and Adj Tth If AdjTth is selected the additional Delta field will appear after Tach Pos FLA See paragraph 9 1 2 5 below for more on this setting Press the key to move to the next field 9 1 2 4 Use the to select Tach Pos FLA Tachometer position from Forward Looking Aft This is the clock position where the tachometer trigg...

Page 171: ...ext field 9 1 2 9 Use the key to select the Sensor Type you will use for this balance If the sensor you intend to use is not among those listed see Chapter 22 Analyzer Management to learn more about adding sensors Use the key to move to the next field 9 1 2 10 Use the key to select the Ch Channel A B C or D where you will connect the sensor input from the vibration sensor in this same row Use the ...

Page 172: ...o choose between Accel Decel or Both 9 1 3 3 If Both is selected in the Acquire on field the Order field will be displayed Use the key to move to this field This field allows you to choose the order in which data will be collected Use the key to choose between A D acceleration followed by deceleration or D A deceleration followed by acceleration 9 1 3 4 Press the key to move the cursor to the Acc ...

Page 173: ...e a known speed range where vibration data should not be considered for calculating a balance solution Selecting Yes will remove the Bins and Target fields for the affected speed band 9 1 3 8 Press the key to move the cursor to the Bins field This field is used to subdivide the affected speed band into smaller segments for which data will be collected Use the keypad to enter a value between 100 an...

Page 174: ...the first and second weight You will have the option to accept the recommended setting or to ignore it 9 1 4 3 Use the key to move to the Num Wts number of weights field Use the numeric keypad to enter a number corresponding to the total number of different weights in this class weight set You should also define a NULL or NO WEIGHT name which will populate the solution fields where no actual weigh...

Page 175: ... adjacent Name field The unit of measure is that which you defined in paragraph 9 1 1 11 above Typically the first entry in this table will be a NULL or NO WT weight A Null weight is one that may be used to occupy a position when an actual balance weight is not required It may also have a weight value of 0 Normally if this weight is required to occupy each location not containing a trim balance we...

Page 176: ...defined only one balance plane you will only complete one Balance Plane Information screen 9 1 5 2 Use the key to move to the Posn Type field This field will define the terminology used to refer to the weight locations throughout the balance job The choices in this field are Position Hole or Blade After you exit this field the remaining references will change to the selected term Consequently the ...

Page 177: ...tail weights For example with this field set to Yes if there are 15 Usable holes and four are already filled with detail weights the analyzer will only place trim balance weights in 11 With this field set to No the analyzer will be able to place trim weight in all 15 usable holes This field is only available if the Label Detail Wts field in 9 1 1 10 above is set to Job or Setup 9 1 5 6 Use the key...

Page 178: ...forward out of the intake 9 1 5 12 Use the key to move to the MaxWt Position maximum weight per position field Enter a numeric value to define the maximum total number of grams or ounces as defined in paragraph 9 1 1 11 above allowed for installation at any one individual position Typically this value will be equal to the largest weight value in any defined class weight set in this setup A warning...

Page 179: ...and its triggering device magnetic interrupter reflective tape etc With the fan in this position use the 12 00 position as the 0 or 360 degrees index point and measure opposite the direction of rotation to the angle of position number 1 For example if the 1 hole is at the 3 00 position simply as viewed on the face of a clock from the perspective selected in paragraphs 9 1 1 4 and 9 1 1 5 above and...

Page 180: ...position the angle may be measured as 15 degrees On the screen use the keypad to enter the angle of position 1 as 15 Then using the key to move to the adjacent field No input the number 1 Next measure to position 2 If position 2 is measured as 25 degrees enter that value and 2 in the adjacent field Continue this process until all angles for all positions are defined The measurement must always be ...

Page 181: ...e influence coefficient 9 1 7 3 The All Sensors Use the Same ICF field is only available if multiple sensors were selected in paragraph 9 1 1 12 above Use the to toggle the YES NO answer field to indicate if all sensors should use the same influence coefficient 9 1 7 4 The Acc and Dec Use the Same ICF field is only available if Both was selected in the Acquire on field in paragraph 9 1 3 2 above U...

Page 182: ...b 9 1 7 9 The Deg field identifies the phase correction in degrees If no known ICFs are available leave this field at the default value of 0 This field will be updated upon executing the Quit Job selection at the end of a successful balance job 9 1 7 10 If the YES NO toggle fields in paragraphs 9 1 7 2 or 9 1 7 3 are set to No you will repeat these steps for the next screens When all fields are co...

Page 183: ...h field as necessary using the analyzer keypad If Engine Serial Numbers have previously been entered in this analyzer you may optionally press the F3 Eng S N key and select a serial number from the stored list of serial numbers If Engine Types have previously been entered in this analyzer you may optionally press the F4 Eng Type key and select a type from the stored list of types When all fields a...

Page 184: ... the optical tach Before starting the engine make sure all previously installed trim balance weights have been removed On some engines there may be detail or factory installed weights which must not be removed Optionally the existing trim balance weights can remain installed prior to Run 1 However the location and type of the balance weight s will need to be annotated in the analyzer as described ...

Page 185: ...ake any minor adjustments as necessary and then press OK to continue Use the F3 Pol key to reverse the polarity of the Tach Signal If the Current RPM is erratic at a stable engine speed press this key in an attempt to stabilize the reading This option may be necessary when either of the Tooth settings Mod Tth or Adj Tth are selected on some engines 9 2 5 2 The analyzer will display the data acquis...

Page 186: ... If a speed exclusion zone was configured in paragraph 9 1 3 7 the message Entering Speed Exclusion Zone SEZ will be displayed as well as a yellow box across the ribbon gauge with the letters SEZ see the image below on the right Once your acceleration or deceleration is complete press OK to stop the acquisition and proceed CAUTION DO NOT STOP OR DWELL while passing through a Speed Exclusion Zone S...

Page 187: ...o retake only the Acceleration data F2 RetakeDec Allows the user to retake only the Deceleration data F3 RetakeAll Allows the user to retake all data F4 Plot Displays a vibration plot as shown in paragraph 9 2 5 5 below F5 Next Sens Displays run data for the next sensor 9 2 5 5 Pressing F4 Plot in the screen shown in paragraph 9 2 5 4 above displays the Review Prior Run s Data Plot screen shown be...

Page 188: ...multiple sensors and multiple speed bands in both an Acceleration and Deceleration run The function keys available are F0 Backup Returns to the Review Prior Run s Data screen shown in 9 2 5 4 F1 RetakeAcc Allows the user to retake only the Acceleration data F2 RetakeDec Allows the user to retake only the Deceleration data F3 RetakeAll Allows the user to retake all data F4 Plot Spec Displays an ove...

Page 189: ...This may require the removal of that weight for verification Select F5 No if the weights were already removed or there were no existing weights installed 9 2 5 8 List Run 1 Existing Weights From this screen use the keys to move from field to field When the correct field is highlighted use the keys to change the value in that field Entries in this field will either be the Hole Position Blade number...

Page 190: ... the existing weight and location information entered in the previous screen 9 2 5 10 If this is the first suggested weight screen the weights will be test weights unless an established influence was entered in the setup Notice at the top of the screen that the message Remove Old Wts Inst New Wts is shown All previously installed weights must be removed EACH TIME a new solution is installed This m...

Page 191: ...column with a heading of Suggest is the Class Weight suggested for that Position The right column with a heading of Install is the entry for the actual Class Weight installed in a particular Position To change the Class Weight installed for each Position use the and keys to move from field to field When the correct field is highlighted use the and keys to change the value in that field In this cas...

Page 192: ...u to identify missing weights from the class weight set currently being used Use the or keys to move from weight to weight When you reach a weight that is not available use the and keys to place an X in the field replacing the class weight number Class weights marked with an X will be excluded from the calculated solution Using the solution example shown above the SN weight has been identified as ...

Page 193: ...te this job without the option to resume at a later time The Quit Job selection will update the influence coefficient in the setup for use in follow on Jobs F6 Graph Displays a graph of the balance plane as viewed from the perspective chosen in paragraph 9 1 5 11 above The graph will display position location s identified in the solution The line represents the effective angle of the calculated so...

Page 194: ...e setup 9 2 6 2 When the vibration levels have been reduced to a level equal to or lower than the target value set in paragraph 9 1 3 9 above the Balance Status screen will be displayed It informs you that the target value has been met and gives you the option to press F1 Quit Job or F5 Continue to continue the balance process Pressing F1 will complete the job and store any pertinent information b...

Page 195: ... job was satisfactory with few runs it may be acceptable to update the ICF Using the screenshot below as an example if the job went well and you chose to quit the job before reaching the target value it may be acceptable to update the ICF Otherwise it is recommended to discard the ICF as it may negatively affect the next balance job 9 3 Resume Job The features in this section are common among all ...

Page 196: ...age Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 9 5 Manage Setups The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 197: ...is chapter was updated with corrections to minor typographical errors East 4 27 2016 2 01 Corrected instances where fan was globally replaced with Transient but they didn t apply Lucas 3 6 2019 2 02 Added pertinent information pertaining to software changes incorporating speed filters and weight placement options relative to GE Honda request Other minor editing for clarity Justice 4 1 2020 2 10 Ma...

Page 198: ...ions of each of these options follow along with the information required to complete the menu screens within the options and the steps necessary to perform the balance function 10 1 Start Job Selecting Start Job from the Fan Turbine Balance Jobs banner screen allows you to begin a new fan trim balance job When you select this option one of three screens will appear depending on whether you are 1 S...

Page 199: ...ortunity to resume it Pressing the F1 Yes key will return you to the last logical in progress step of the job Pressing the F5 No key will proceed as described in the two examples below depending on your circumstances Select Setup List If you are starting a new job with previously defined setups available in the analyzer s memory the screen will automatically display the Select Setup List banner sc...

Page 200: ...he Fan Turbine Balance Setup banner screen allows you to define and store a Fan Turbine Balance Setup in both fill in and selection fields The fill in fields have squared off ends These fields are filled in using inputs from the analyzer keypad The selection fields have pointed ends These fields have two or more preset values that are selected by using the and keys Navigate between the fields on t...

Page 201: ...terclockwise 10 1 1 3 Using the key move to the Viewed From field This field is used to define the Engine Rotation perspective The two available perspectives are FLA Forward Looking Aft and ALF Aft Looking Forward The FLA perspective is determined by standing in front of the engine and noting the direction the fan rotates as viewed looking into the intake The ALF perspective is determined by notin...

Page 202: ...ing screen 10 1 1 8 Use the key to move to the Label Detail Wts field Detail weights are those weights that are installed at the factory and cannot be removed If these weights occupy positions normally used for trim balancing you may label those occupied positions so that the balance solution will be calculated disregarding those locations In addition if the engine has holes that are typically unu...

Page 203: ...u may encounter a phenomenon known as runout Runout occurs as a result of the physical properties of some shafts The Slow Roll RPM is used to identify what the actual signal is and then these measured values are subtracted from all subsequent vibration measurements 10 1 1 13 Move to the Min Baln RPM minimum balancing speed field by using the key Enter the minimum speed in RPM that may be used for ...

Page 204: ...the first sensor in the first column and the speed settings for the second sensor in the second column 10 1 2 3 Press the key to move the cursor to the Balance Relative to Defined Peak Speed field The field will be highlighted and defaulted to the No answer as illustrated in the first screen below With the No answer displayed the entered speeds are not relative to the highest peak vibration In thi...

Page 205: ...Use the key to make your selection 10 1 2 5 When all fields are completed and set per your requirements press OK to continue 10 1 3 Define Class Weights Screen 10 1 3 1 The Define Class Wts banner screen if class weight is selected in paragraph 10 1 1 6 will be displayed To define a class weight set do the following 10 1 3 2 In the Set ID field use the keypad to enter a name or part number for the...

Page 206: ...match the suggested solution 10 1 3 6 Use the key to move to the Add Remove field The only selection in this field is Remove then Add You cannot edit this selection at this time 10 1 3 7 Use the key to move to the Name field Use the keypad to enter a name or part number to identify each weight in the class weight set 10 1 3 8 Use the key to move to the Wt weight field This field defines the exact ...

Page 207: ...h additional class weight set If you have specified only one class weight set for this setup press OK and go to paragraph 10 1 4 10 1 4 Balance Plane Information Setup Screen To complete the Balance Plane Information setup screen s as shown below do the following 10 1 4 1 The Plane ID field displays the identifying number for the balance plane information You will complete one of these information...

Page 208: ... to move to the Detail Reduce Usable This field will let you define whether the detail weight holes reduce the number of holes usable for trim balance In some cases the Num Usable holes paragraph 10 1 4 4 above may be reduced by the presence of detail weights In this case enter Yes and the analyzer will reduce the number of available trim balance holes by the number of holes occupied by detail wei...

Page 209: ...ckwise or CCW for counterclockwise The direction is based on the order of ascending value or increasing numbers 10 1 4 11 Pressing the key will move the cursor to the from field to the right of the Position Num Dir field Use the key to select the perspective used to view the direction of the position numbering The two available perspectives are FLA Forward Looking Aft and ALF Aft Looking Forward T...

Page 210: ...r to use as a trial weight in the first balance run This trial weight will only be used if an Influence Coefficient ICF is not stored in the setup 10 1 4 16 If you selected Even position spacing in paragraph 10 1 4 9 above use the key to move to the Angle of 1 Posn field Use the keypad to enter the angular location of the first weight position as viewed from the perspective selected in paragraph 1...

Page 211: ...pter reflective tape etc With the fan in this position use the 12 00 position as the 0 or 360 degrees index point and measure opposite the direction of rotation to the angle of each position number and record that angle adjacent to the position number For example if the 1 position is near the 6 00 position the angle may be measured as 174 degrees On the screen use the keypad to enter the angle of ...

Page 212: ...n Use the key to move from hole number to hole number When the cursor highlights a hole number that is currently occupied by a detail weight use the key to toggle between the hole number and an X The X symbolizes that a Detail Weight is located in this hole and it is not available for trim balancing 10 1 6 Sensor Information Screen 10 1 6 1 In the Eng ID engine identification use the numeric keypa...

Page 213: ...rs from 1 to 12 If you are unsure of the location of the tach trigger event use the key to select UNK Press the key to move to the next field 10 1 6 5 Use the keypad to enter a value in the Delta field This value will be the amount that the shifted tooth detection is shifted Valid entries are from 1 0 through 16 in signal shift 10 1 6 6 Use the key to select the Tach Filter Type The options are fo...

Page 214: ... of the sensor on the engine as viewed from forward of the engine looking into the intake Use the key to move to the next field 10 1 6 13 Use the keypad to enter a value in the Targ field The value will define the point where the analyzer provides a suggestion to terminate the balance job When all fields are complete press OK to continue 10 1 7 Define Fan Turbine Balance ICFs Screen NOTE If an Inf...

Page 215: ...5 Use the key to move to the next field Enter an established or calculated influence for this setup from the keypad In the Balance weight units Vib units field enter the units of weight grams or ounces as designated in the setup required to reduce one engineering unit of vibration to the lowest possible level In the Deg field enter the phase correction in degrees If these values are unknown 0 zero...

Page 216: ...cessary using the analyzer keypad If Serial Numbers or Engine Types have previously been entered in this analyzer you may optionally press the F3 Eng S N or F4 Eng Typ key and select a serial number or engine type from the stored list When all fields are complete per your requirements press OK to accept and continue 10 1 9 2 If you selected to label detail weights in the Job in paragraph 10 1 1 8 ...

Page 217: ...ere may be detail or factory installed weights which must not be removed Check the applicable Maintenance Manual prior to removing weights if you are not familiar with this engine and the balancing procedures When all installations and connections are made and tachometer checks completed as necessary press OK to accept settings and continue NOTE The option to turn tach power on or off using the F1...

Page 218: ...erratic at a stable engine speed press this key in an attempt to stabilize the reading This option may be necessary when either of the Tooth settings Mod Tth or Adj Tth are selected on some engines 10 1 11 2 The analyzer will display the Set Engine Speed screen Use the on screen indications of engine RPM and Percent to set the current RPM to match the desired RPM When the desired RPM is reached pr...

Page 219: ...is message is displayed when enough data has been collected to continue However the data collected at this point may not be the best to provide an optimum solution It is recommended to wait for the Complete Press OK message before proceeding Complete Press OK This message will appear when the optimum number of consistent samples has been collected Allow the unit to collect data as long as the erro...

Page 220: ...h for the Error indication to be stable as an indication of acceptable data rather than waiting for it to decrease further 10 1 12 Review Prior Run s Data 10 1 12 1 The Review Prior Run s Data screen shown below will be displayed showing the RPM Vib amplitude and Deg phase angle collected on all runs up to this point Pressing the or keys will allow you to navigate through the readings from all run...

Page 221: ...e key to acknowledge the message and shut down the engine s 10 1 14 Fan Turb Suggested Installed Wts 10 1 14 1 After displaying a brief Optimizing Solution status indicator the Fan Turbine Suggested Installed Wts screen will be displayed If this is the first suggested weight screen the weights will be test weights unless an established influence was entered in the setup Notice at the top of the sc...

Page 222: ...s only been placed in location number 1 The other 10 weight locations have not been used yet and are marked with the symbol The center column with a heading of Suggest is the Class Weight suggested for that Position The right column with a heading of Install is the entry for the actual Class Weight installed in a particular Position To change the Class Weight installed for each Position use the an...

Page 223: ...you to identify missing weights from the class weight set currently being used Use the or keys to move from weight to weight When you reach a weight that is not available use the and keys to place an X in the field replacing the class weight number Class weights marked with an X will be excluded from the calculated solution Using the solution example shown above the 416 weight has been identified ...

Page 224: ...allows you to select an optional balance plane and or weight set F5 Quit Job Allows you to terminate this job without the option to resume at a later time F6 Graph Displays a graph of the balance plane as viewed from the perspective chosen in paragraph 10 1 4 11 above The graph will display position location s identified in the solution 1 in the example above The line represents the effective angl...

Page 225: ...arget amplitude entered in the setup 10 1 15 2 When the vibration levels have been reduced to a level equal to or lower than the target value set in paragraph 10 1 6 13 above the Balance Status screen will be displayed It informs you that the target value has been met and gives you the option to press F1 Quit Job or F5 Continue to continue the balance process Pressing F1 will complete the job and ...

Page 226: ...ee the message below telling you why the ICF could not be updated 10 2 Resume Job The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 10 3 Manage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 227: ...Added text describing what a means for a weight location in paragraph 10 1 14 1 Lucas 1 14 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter only applies to the Viper II and the generalization has minimal impact This chapter was updated with corrections to minor typographical errors East 04 01 2020 2 10 Major rewrite to update all SP7 UI changes A...

Page 228: ...gram will shuffle the entire set and display a new placement location for each blade in the set to attain the best possible balance through weight distribution This negates the necessity for changing matched pairs of blades when one of the blades is not damaged and still serviceable The program is not limited by the number of new blades that can be combined with the remaining serviceable blades in...

Page 229: ...If a setup has previously been entered for the engine model you are currently working you may select it from the Select Setup List as illustrated in the screen sample below and proceed to paragraph 11 1 3 If your engine model is not listed press the F1 New key and proceed to paragraph 11 1 2 2 11 1 2 2 In the Fan Blade Mapper Setup screen shown below use the key to move from field to field and com...

Page 230: ...ich will allow up to 99 blades in a set This numbering style is how you will identify each blade in the set for weight and later for location placement 11 1 2 6 In the Units of Measure field use the keypad to enter the units of measure you wish to use for the blades such as Inch Grams 11 1 2 7 In the Max Total Error field use the analyzer keypad to enter the maximum total error for the distributio...

Page 231: ... a maximum allowable weight difference between two opposing blades The analyzer will map the blades in the best configuration available but will not place blades opposite each other whose weight exceeds this value 11 1 2 10 When all fields are complete press OK to accept your settings and continue 11 1 3 Job Identification 11 1 3 1 The Job Identification screen shown below will be displayed Use th...

Page 232: ...ice that there are three columns one for the Position Posn of the Blade one for the Blade identifier A Z or B1 B99 and one for the Weight There are a number of rows equal to the total number of blades in the set as identified earlier in paragraph 11 1 2 4 above The Position column will be displayed to act as a reference for the order of blade numbering and location The Weight column will display a...

Page 233: ...n column If you selected Yes in paragraph 11 1 2 8 above the fourth column will be displayed listing the Blade Serial number At the bottom of the screen you will see the Total Error for the new placement If you notice that any of the weights shown is not correct or if you wish to replace one of the blades with a new blade and its new weight press the F1 Edit Wt key The screen will revert to that s...

Page 234: ...ot acceptable perform a Transient Balance in accordance with Chapter 9 or a Fan Turbine Balance in accordance with Chapter 10 11 2 Resume Job The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 11 3 Manage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the...

Page 235: ...ter reference link in footer and added Revision History table Berlin 11 25 2015 1 02 Updated to reflect Define Max Weight Difference Between Opposing Blades feature East 1 14 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter only applies to the Viper II and the generalization has minimal impact East 4 30 2020 3 00 Major rewrite updating screenshot...

Page 236: ...function is available as part of the Viper II Main Menu and is used with or without the model 1752B JEDA dependent on the engine computer model If you are not sure what performance equipment and accessories you currently have or need contact ACES Systems at 865 671 2003 or via email at Support acessystems com To conduct a performance run using the Viper II and Honeywell Performance refer to Sectio...

Page 237: ...288 10 320 0275 10 320 0422 CABLE EMS DIRECT CONNECT N1 DEEC Generic JEDA N1 DEEC Comm F0 S Y S T E MS VIPER II Analyzer Boot Version App Versi on 0 _ A A A A A A 1 B 2 Au x C o m m 3 C 4 D STR B JED A ASSY F2 F1 F5 F4 F3 F6 ABC 1 DEF 2 GH I 3 J KL 4 M NO 5 PQ R 6 STU 7 VWX 8 YZ 9 OK 10 100 0214 AMB Temp P robe 10 320 0347 AMB Temp Cable 10 320 0267 SN 88 and higher only SN 87 and lower only Viper...

Page 238: ... 35 3 0 Pressure Hoses Optional 3 0 Press Transducer Optional 2 35 Press Transducer 2 35 Press Cable 3 0 Press Cable AMB Press Cable AMB Temp Cable AMB Temp Probe For N2 DEEC and 8002 60 62 N1 DEEC equipped engines DEEC HARNESS DEEC HARNESS EEC HARNESS Sta 2 35 Temp Cable Sta 3 0 Temp Cable JEDA to 8002 60 62 ONLY N1 DEEC Comm N1 DEEC N1 DEEC EEC N2 DEEC To Engine To Engine To Engine Generic JEDA ...

Page 239: ...N1 DEEC Comm cable is a generic design that connects directly to the J2 connection of the N1 computer and either to the JEDA or to the EMS Direct Connect cable Engine airframe specific cables are necessary for access to the computer where other means of communicating with the computer are not available There are specific designs for the airframes listed in the figures above When collecting data fr...

Page 240: ...e are also optional but recommended for data quality NOTE To reduce the occurrence of communication errors it is recommended to connect all necessary cables and sensors BEFORE powering on the equipment Once the cables are connected power on the JEDA You will hear a series of clicks followed by a short pause and then a single click Finally power on the Viper II analyzer 12 1 2 Analyzer Operation 12...

Page 241: ...tions the information screen shown below will be displayed to indicate what connections were detected Note that if you are using N1 DEEC Direct Connect no JEDA related connections will be detected or displayed In addition to the connections indicated if using N1 DEEC Direct Connect the AMB Temp Cable P N 10 320 0347 will display a solid BLUE light to indicate the temp probe is receiving power a fl...

Page 242: ...played If conducting the run on EEC N2 DEEC or 60 62 N1 DEEC computers use the key to scroll through the list of available engine models The list is restricted to those engine models that may be installed on the aircraft model selected in the Aircraft Selection screen above Double check the engine model as an error in this selection can make significant differences in the reduced data If the engin...

Page 243: ...elect screen will be displayed If conducting the run on EEC N2 DEEC or 60 62 N1 DEEC computers use the key to scroll through the list of available Nozzles that may be installed on the engine model and aircraft selected in paragraphs 12 1 2 6 and 12 1 2 7 above Press OK to accept your selection and continue 12 1 2 9 The Performance Calibration Setup screen shown below will be displayed Complete thi...

Page 244: ... or degrees F Press the key to move to the next field N1 Delta RPM Use the analyzer keypad to enter the N1 Delta RPM This is the allowable N1 speed drift from a stable speed before the data logger or Viper II will detect and store an invalid sample The default is 100 If wind conditions dictate this value may be set as high as 300 RPM however data quality may be questionable if taken in such extrem...

Page 245: ...orrect entry then press OK to accept your selections and entries and continue 12 1 2 10 If the engine you are running is EEC or N2 DEEC equipped the information message below will be displayed Press F1 Yes to conduct the bleed valve check or F5 No to continue without conducting the check NOTE If the engine is N1 DEEC equipped this message will not be seen as the Bleed Valve Check is not an option ...

Page 246: ...r to return the N1 DEEC computer to the default mode you must cycle the N1 DEEC power switch any time power to the analyzer is lost during a calibration run Press the F5 key to acknowledge and continue 12 1 2 13 The information screen below will be displayed The OAT outside air temperature and both the current N1 and N2 speeds will be displayed on the screen Use this temperature to calculate N1 fo...

Page 247: ...yzer will afford you the opportunely to continue the run without returning to the beginning of the run Press F5 to acknowledge and continue 12 1 2 15 The STABILIZATION screen shown below will be displayed This screen will be displayed while the engine is in the stabilization mode and will automatically advance to the acquisition mode when the engine is thermodynamically stable The length of time t...

Page 248: ...f the P Set indication The normal time required for acquiring each point is one minute If data quality dictates the scan period may be extended until the required number of acceptable data samples is acquired 12 1 2 17 When acceptable data is acquired the screen will automatically display the review screen shown below As indicated at the bottom of the screen use the and keys to select data points ...

Page 249: ...ue The screen will then return to the acquisition screen shown above in paragraph 12 1 2 15 with the P Set indicating the next sequential point number The process then repeats for each of the five points until all data is collected 12 1 3 Information Screens 12 1 3 1 During data collection you may encounter one or more of the screens shown below Each screen is displayed if certain events occur The...

Page 250: ...and are terminating the job This screen directs actions that are required in order to return normal control to the N1 DEEC computer As in the example below the PLA must be reduced to a point equal to or less than an N2 indication of 96 1 When the required speed is attained press OK to continue the process 12 1 3 3 The screen below will be displayed as a last action to be completed for returning co...

Page 251: ...An information screen similar to the one shown below will be displayed each time the Viper II Analyzer is adjusting power for the next point You should not attempt to press any keys during this process You should also not move the PLA or activate or deactivate any aircraft systems that would change the power setting of the engine This screen is active only when conducting calibration runs on N1 DE...

Page 252: ... screen below you must then define the parameters of the additional points and manually make power adjustments for the additional points even when the engine computer is an N1 DEEC 12 1 3 7 The information screen below will follow the screen above in paragraph 12 1 1 1 if you answer Yes in that screen In this case move the PLA to the desired power point and press the F5 key to continue collecting ...

Page 253: ...low These choices allow you to manage previously completed job data you have stored in the analyzer 12 2 1 Review Selecting the Review option presents a list of stored jobs on the Job List banner screen You can select one job for on screen viewing When viewing is complete press the F0 Back Up key or OK key to exit the screen The analyzer will then return you to the Manage Jobs menu screen to selec...

Page 254: ...or permanent record prior to deleting Once deleted the jobs cannot be retrieved from the analyzer 12 2 5 Export Job The Export Job option presents a list of stored jobs on the Export Job to USB banner screen From the list you may choose a job to be exported directly to a USB memory device The exported job file is in a tgz format and is currently used to aid ACES Product Support when assisting cust...

Page 255: ...rmance screen menu will retun the screen shown below In that screen you will see the word Connections near the top of the screen Listed below Connections is a list defined by the name in the left column and the results associated with that definition to its immediate right For example in the screen below the OAT Connected indicates that an Outside Air Temp cable and RTD sensor are connected to the...

Page 256: ... to abort the test default or ignore the PLA movement All settings are toggled by using the RIGHT ARROW or LEFT ARROW keys Press F1 to save the changes or F5 to reset the setting to default values 12 8 Monitor JEDA Parameters The Monitor JEDA Parameters option allows the display of data parameters measured by the JEDA This option is generally used as a troubleshooting tool when the scan data is qu...

Page 257: ...r mode The data is collected by polling each parameter from the N1 DEEC It may take several seconds to scan through all of the available N1 DEEC parameters 12 10 Monitor N1 DEEC Fast Scan The Monitor N1 DEEC Fast Scan option displays a limited set of data from a N1 DEEC Each data point is averaged Pressing F3 will reset the averages This option is generally used as a troubleshooting tool when the ...

Page 258: ...2 11 Monitor Aux OAT The Monitor Aux OAT option allows the display of data measured from the OAT sensor attached to the Aux Com port on the Viper II analyzer While in Monitor mode the OAT data and measuring software version will be updated approximately once 1 times per second ...

Page 259: ...iper II and the generalization has minimal impact A note was added prior to para 12 1 2 with the sequence for connecting the cables and powering on the equipment This chapter was also updated with corrections to minor typographical errors East 2 27 2017 2 01 Added Lear 40 and Lear 70 to engines using the 10 320 0273 cable Lucas 10 18 2018 2 10 Added EMS Equipment Setup drawing to reflect EMS Direc...

Page 260: ...enu is an option within the Transient Vibration Survey function Descriptions of each of these options follow along with the information required to complete the menu screens within the options and the steps necessary to perform the transient vibration survey function The Transient Vibration Survey option allows the user to rapidly complete and store a transient vibration survey using the Setup fea...

Page 261: ...from scratch or whether an incomplete job still exists in the analyzer s memory Incomplete Job If another job was in progress but was not completed the Incomplete Job banner screen will be displayed to inform you of this The displayed message will give you the details of the last incomplete job and provide the opportunity to resume it Pressing the F1 Yes key will return you to the last logical in ...

Page 262: ...he actual setup names will be those which you have entered into your analyzer Transient Survey Setup Screen If you are starting a new job with no setups previously defined in the analyzer s memory the screen will automatically display the Transient Survey Setup banner screen shown below 13 1 1 Transient Survey Setup The Transient Survey Setup banner screen allows you to define and store a transien...

Page 263: ... time The name should be one of your choosing which will be easily recognized and associated with this setup such as Citation 10 Lear 45 or CF34 3A 13 1 1 1 2 Using the key move to the frequency unit field which is defaulted to RPM The two selections are RPM and Hz Determine if the display frequency units are to be in revolutions per minute RPM or cycles per second Hz then use the key to toggle be...

Page 264: ...l if you are trying to separate one single peak into two very close peaks The value displayed will be the frequency interval between each pair of lines on the final spectral display 13 1 1 1 7 Use the key to move to the Display field Use the key to select the Display type Your selection in this field will determine how the initial data is displayed on the analyzer screen during acquisition A selec...

Page 265: ... provide additional selection fields in the Mod Max and Sensor columns 13 1 1 1 11 Use the key to move to the Mod field The Mod field determines the modifier that will be applied to the engineering units of the spectra Consult your equipment maintenance manual for specific requirements of a vibration survey or for analysis guidelines Use the key to select the modifier such as Peak Peak to Peak Pk ...

Page 266: ...select the sensor you will use for this channel If the sensor you are using is not in the selection list you must enter the sensor setup See Chapter 22 for entering a sensor setup Any selection other than None will automatically display the appropriate field in the Desc column 13 1 1 1 17 Move to the Desc description column in the Channel A row by using the key The field defaults to its associated...

Page 267: ... Manual 13 8 Transient Vibration Survey Chapter 13 Revision 4 10 Apr 20 13 1 1 3 Conditions The Conds conditions key which corresponds to the F1 key will display the Conditions screen as shown in the example below ...

Page 268: ...emory management tool It also allows the analyzer a specific time block to collect data at the specified condition Following data acquisition for the specified amount of time data collection will terminate allowing you to proceed to the next condition A setting of 0 will allow the analyzer to acquire data until terminated by the user pressing OK 13 1 1 3 4 When all conditions are completed per you...

Page 269: ...s in this field The description should be one that all users of this setup are familiar with and easily understand 13 1 1 4 3 The 100 Spd column is used to enter the rpm at 100 of component speed Use the keypad to enter the value in the 100 Spd field The example above shows 4800 and 10000 for N1 and N2 respectively This will cause the analyzer to also display the component speed in percent during ...

Page 270: ...column using the keypad 13 1 1 4 7 The Plot Div determines the intervals or divisions of speed indication on the plots across the full speed range For instance if you intend to view the plot in a range of 1000 to 2000 RPM and wish it to be in divisions of 500 RPM enter 2 in this column using the keypad That is the upper range 2000 minus the lower range 1000 divided by increments of 500 RPM 2 divis...

Page 271: ...bandwidth 13 1 1 5 3 Use the keypad to enter the lowest frequency of interest F lower If Speed is set to a xCS1 through xCS4 selection this value is multiplied by that component speed and defines the lowest frequency variance where you will monitor the component speed If Speed is set to RPM or Hz this value will define the lowest frequency in a fixed range 13 1 1 5 4 Use the keypad to enter the hi...

Page 272: ... only channel selected to collect broadband measurements The name BBnd A will already be assigned and not selectable The Max value is a toggle field Use the key to select a maximum value above the value you expect to see The final Units column will be pre configured based on the sensor selected in paragraph 13 1 1 1 16 above The Broadband units will always be measured in the same units as the sens...

Page 273: ... fields default to No on initial opening of the screen If you wish to plot a transient survey toggle the answer field to Yes under the column of choice In the example above the OVERALL vs Time and Broadband versus Time plots have been chosen A No answer in any of the speed fields will indicate that you do not wish to plot that parameter against that speed The time plots will be printed regardless ...

Page 274: ...t of the Transient Survey Setup screen after selection F5 Limits from the main Transient Survey Setup screen Press the F1 key if you wish to define Parameter Limits for the transient survey plots Use the key to move from field to field and enter a limit value using the analyzer keypad When all desired limits are defined press OK to accept your settings and return to the Transient Survey Setup scre...

Page 275: ...n after selection of F5 Limits from the main Transient Survey Setup screen Press the F2 key if you wish to define Spectra Limits for the transient survey plots To define spectra limits do the following 13 1 1 10 1 Choose the spectrum for which you wish to define limits L Chan A L Chan B L Chan C or L Chan D from the corresponding function key at the bottom of the screen The letters A B C and D are...

Page 276: ...ive to a specific RPM range or xHz used to enter a limit relative to a specific Hz range 13 1 1 10 6 Move to the Limit column and enter the amplitude limit for the bandwidth specified in F low and F high of the same row This limit will be displayed as a horizontal line relative to the engineering units specified on the Transient Survey Setup screen in the Vibration field When all desired limits ar...

Page 277: ... but we highly recommend you fill in as much information as possible for ease of use in trending recall and storage Navigate move between the fields using the and keys All fields are entered from the keypad with the exception of the Pos Position field which is a selection field The position indicates the position on the airplane of the engine propeller or subcomponent Using the key select position...

Page 278: ...enter of the screen the information message Tach power is on will be displayed This indicates that power to the optical tachometer is currently available to check alignment with the reflective target If you do not wish to do the alignment at this point press the F1 Tach Pwr key to remove power to the optical tachometer When all installations and connections are made and tachometer checks completed...

Page 279: ...ate screen will be displayed as shown in the example below You MUST calibrate the microphone before every use Differences in temperature and pressure will affect the microphone readings if it is not properly calibrated Follow the steps below to properly calibrate the microphone 13 1 5 1 Select channel to calibrate 13 1 5 1 1 Highlight the channel to be calibrated and press OK The analyzer will dis...

Page 280: ...r Turn the calibrator on and press OK on the analyzer 13 1 5 2 2 After calibration the analyzer will display the Acoustic Sensor Calibration screen 13 1 5 3 Acoustic Sensor Calibration 13 1 5 3 1 The Acoustic Sensor Calibration screen provides details of the calibration You will have the option to change the calibration by pressing the F1 Change key and repeating the steps in paragraph 13 1 5 2 1 ...

Page 281: ...ngine Start the engine or component you are checking e g generator gearbox etc When the component reaches normal operating conditions e g speed temp etc press the OK key to begin acquiring data NOTE The F4 menu item Calib and the message Press F4 to change the microphone Calibration will only appear if a microphone has been selected as a sensor in the setup 13 1 7 Select Condition If multiple cond...

Page 282: ... the analyzer will begin data acquisition as soon as the screen is displayed and the F5 menu will display Event For a description of the fields and function keys see paragraphs 13 1 8 1 and 13 1 8 2 below You will also see three function boxes at the bottom of the screen see following figure corresponding to the position of the F1 F4 and F5 keys directly below them The boxes read Maximum Spectra a...

Page 283: ...ach channel configured 13 1 8 1 5 MxChan x Displays the maximum values reached for each channel configured If the w Record option was selected in paragraph 13 1 1 1 7 these values will read 0 00 until the F5 Record key is pressed 13 1 8 1 6 Units Displays the unit of measure selected in paragraph 13 1 1 1 10 for each sensor channel configured 13 1 8 1 7 Speed Displays the speed in percent for each...

Page 284: ...elated with the survey 13 1 9 Collecting Data with Spectra or Spectra w Record If the display type was selected as Spectra or Spectra w Record in paragraph 13 1 1 1 7 above the spectrum s are displayed If multiple sensors were configured the display will be divided in half for two sensors top and bottom or into quadrants for three or four sensors as shown below The Record menu option above the F5 ...

Page 285: ...Displayed at the lower left corner of the spectrum and represents the minimum frequency of the X scale as entered in paragraph 13 1 1 1 3 13 1 9 1 5 Frequency unit Centered at the bottom of the spectrum and is the frequency unit selected in paragraph 13 1 1 1 2 13 1 9 1 6 Maximum frequency Displayed at the lower right corner of the spectrum and represents the maximum frequency as entered in paragr...

Page 286: ...ong the X horizontal axis of the spectra by pressing the or keys Hold down the key for large and rapid incremental changes The value of the X axis frequency and Y axis amplitude will be displayed for the current position of the cursor Incremental values are determined by the number of lines of resolution specified in the setup screen Pressing the F2 Harmonic key will produce multiple harmonic curs...

Page 287: ...eys will return to Options Overall and Event respectively If no cursor is displayed when pressing this key only the box nomenclature will change Pressing the F2 X scale or F3 Y scale keys will change the F1 F2 F3 and F5 boxes to read Expand Default Shrink and Cancel respectively as shown in the following figure Pressing the F1 Expand key will expand the X or Y scale of the spectra in effect enlarg...

Page 288: ...ayed and the X Y and Ovr Overall values will be shown in the upper right corner of the screen The three boxes above the F1 F4 and F5 keys will return to Options Overall and Event Record respectively If you wish to Shrink the X scale even further retrace the steps from that point as described in the text Pressing the F4 View key will display another sub menu The Function keys will be identified by ...

Page 289: ...splayed If multiple conditions were configured in paragraph 13 1 1 3 the Select Aircraft Condition banner screen is again displayed as shown in the following figure Notice that the condition for which you just collected and stored data now has an X immediately to the left of the defined condition This alerts the user that data has been collected and stored for this condition This does not preclude...

Page 290: ... F1 Pause Job key This will cause the following screen to be displayed If you are finished collecting data shut down the engine s per the manual instructions and use the F5 Continue key to mark the job complete and store it to memory From the Select Condition screen to quit the job and return to the Transient Vibration Surveys banner screen press F5 for Quit Job 13 2 Resume Job The features in thi...

Page 291: ... Because of this they are contained in Chapter 3 Using the Gen II Analyzer 13 4 Exporting Time Trace Information For Transient Vibration Surveys export the PWC Time Trace information of the job s as necessary by selecting Transient Vibration Survey from the Main Menu and pressing OK Select Manage Jobs and press OK Select Export PWC Time Trace and press OK ...

Page 292: ...alue when capturing multiple jobs on the same engine To set the starting run number for the second run add the number of conditions to the second job For example if the number of conditions is 4 then when exporting the second job set the starting run number to 5 Enter information into Run Description field regarding the survey or engine condition and any additional PWC Export Details as necessary ...

Page 293: ...y to tailor the report to display only what is relevant The feature is only for transient vibration surveys To generate a custom report select Manage Jobs under the Transient Vibration Survey Jobs Select Create Report to generate a report for customizing Select the desired Job Report to be created In the Print Transient Job menu select Print Custom Report to begin tailoring the report ...

Page 294: ... key to include all elements of collected data in the report To clear all elements of the report press F4 Clear When the desired information has been selected press OK When complete press F5 Continue To transfer the custom report to the USB Drive return to the Main Menu screen and select Analyzer Management From the Analyzer Management menu select Transfer Reports The report will then be transferr...

Page 295: ...vision history table Added Broadband feature instructions Berlin Lucas 1 18 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter only applies to the Viper II and the generalization has minimal impact This chapter was updated with corrections to minor typographical errors East 8 11 2017 4 00 Added Time Trace Exporting Time Trace Reports and Custom Rep...

Page 296: ...ons and the steps necessary to perform the vibration spectrum surveys function Viper II Cobra II The Vibration Spectrum Survey option allows the user to rapidly complete and store vibration surveys using the Vibration Spectrum Setup feature described in paragraph 14 1 1 below With the setup feature you may complete surveys on several different components without manually entering the setup data be...

Page 297: ...opportunity to resume it Pressing the F1 Yes key will return you to the last logical in progress step of the job Pressing the F5 No key will proceed as described in the two examples below depending on your circumstances Select Setup List If you are starting a new job with previously defined setups available in the analyzer s memory the screen will automatically display the Select Setup List banner...

Page 298: ...lows you to define and store a vibration spectrum survey setup As shown in the figures below some fields in this screen have default values that appear automatically You can use this information if appropriate or input your specific setup information using the keypad Refer to Chapter 3 Using the Gen II Analyzer if you are unfamiliar with using the keypad The analyzer will display the Vibration Spe...

Page 299: ... key to move to the minimum frequency field immediately to the right of the frequency unit field Use the analyzer keypad to enter the minimum frequency of interest for this survey relative to the frequency units selected in paragraph 14 1 1 1 2 above If you desire a high pass frequency such as 40 Hz the minimum frequency field should reflect this as the minimum frequency of interest 14 1 1 1 4 Use...

Page 300: ...acquired The displayed amplitude will not decrease thus the term peak hold A peak hold survey will continue to collect data until you stop acquisition by pressing the OK key Expon will show the changes in amplitude as they occur allowing you to view the data in real time The analyzer collects data until you stop the data collection by pressing the OK key Consult your aircraft s equipment maintenan...

Page 301: ... the equipment application set this field as low as possible while still allowing sufficient space to display the maximum limitations as stated above 14 1 1 1 12 Repeat paragraphs 14 1 1 1 9 through 14 1 1 1 11 above for each of the remaining channels per your requirements 14 1 1 1 13 Use the key to move to the Sensor field for the Channel A row Use the key to select the sensor you will use for th...

Page 302: ...s press OK to accept and return to the Spectra Setup screen 14 1 1 3 Speeds Viper II only Press the F2 Speeds key from the Vibration Spectrum Setup screen shown above in paragraph 14 1 1 The Speeds option allows you to measure several types of speed inputs for synchronizing with the vibration input or to provide an entry field for reference where no actual speed input is available This allows you ...

Page 303: ...f component speed Use the keypad to enter the value in the 100 Spd field The example above shows 4800 and 10000 for N1 and N2 respectively This will allow the analyzer to also display the component speed in percent during data acquisition Therefore when used on an engine spool N1 or N2 for example the analyzer s indication will match the cockpit indicator 14 1 1 3 4 The FACTOR column can be used t...

Page 304: ...quencies above that value 14 1 1 3 7 Repeat paragraphs 14 1 1 3 1 through 14 1 1 3 46 for each of the channels required When all fields are completed per your requirements press the OK key to return to the Vibration Spectrum Setup screen 14 1 1 4 Limits Press the F3 Limits key from the Vibration Spectrum Setup screen shown above in paragraph 14 1 1 The Limits option allows you to enter the limits ...

Page 305: ...in a fixed range The Viper II provides the additional selections of xCS1 through xCS4 If Unit is set to one of these this value is multiplied by that component speed configured in paragraph 14 1 1 3 above and defines the highest frequency variance where you will monitor the component speed 14 1 1 4 6 Move to the next column Unit and use the and keys to select the frequency unit This selection will...

Page 306: ...14 1 2 Job Identification The next screen displayed is the Job Identification banner screen shown in the following illustration All information on this screen is optional however we highly recommend you fill in as much information as possible to ease the task of storage and retrieval of surveys from the analyzer s memory If you have Customer names or A C Registrations stored you may press the F1 C...

Page 307: ...al but we highly recommend you fill in as much information as possible for ease of use in trending recall and storage Navigate move between the fields using the and keys All fields are entered from the keypad with the exception of the Pos Position field which is a selection field The position indicates the position on the airplane of the engine propeller or subcomponent Using the key select positi...

Page 308: ... s Speeds screen in paragraph 14 1 1 3 above was configured for use of an optical tachometer the information message Tach power is On will be displayed near the center of the screen This indicates that power to the optical tachometer is currently powered on to check alignment with the reflective target When all installations and connections are made and tachometer checks completed as necessary pre...

Page 309: ... a microphone the Select channel to calibrate screen will be displayed as shown in the example below You MUST calibrate the microphone before every use Differences in temperature and pressure will affect the microphone readings if it is not properly calibrated Follow the steps below to properly calibrate the microphone 14 1 5 1 Select channel to calibrate 14 1 5 1 1 Highlight the channel to be cal...

Page 310: ...ation the analyzer will display the Acoustic Sensor Calibration screen 14 1 5 3 Acoustic Sensor Calibration 14 1 5 3 1 The Acoustic Sensor Calibration screen provides details of the calibration You will have the option to change the calibration by pressing the F1 Change key and repeating the steps in paragraph 14 1 5 2 1 Otherwise press OK to complete the calibration process and return to the Sele...

Page 311: ... are checking generator gearbox etc When the component reaches normal operating conditions speed temp etc press the OK key to begin acquiring data NOTE The F4 menu item Calib and the message Press F4 to change the microphone Calibration will only appear in a Viper II and if a microphone has been selected as a sensor in the setup This function is not available in the Cobra II 14 1 7 Select Conditio...

Page 312: ...t Preparing to acquire data message the spectra will be displayed If multiple sensors were configured the display will be divided as shown below in half for two sensors top and bottom in both the Cobra II and Viper II or into quadrants for three or four sensors in the Viper II The analyzer will begin data acquisition as soon as the screen is displayed For a description of the fields and function k...

Page 313: ...1 1 3 14 1 8 1 5 Frequency unit Centered at the bottom of the spectrum and is the frequency unit selected in paragraph 14 1 1 1 2 14 1 8 1 6 Maximum frequency Displayed at the lower right corner of the spectrum and represents the maximum frequency as entered in paragraph 14 1 1 1 4 14 1 8 1 7 Full scale range Displayed on top left corner of the spectrum and represents the maximum range of the Y sc...

Page 314: ...y the number of lines of resolution specified in the setup screen Pressing the F2 Harmonic key will produce multiple harmonic cursors yellow boxes in screenshot below according to the specified frequency range When this key is pressed cursors will appear to the right of the fundamental frequency identified by the leftmost cursor For example if the fundamental frequency is 300 Hz cursors will be pl...

Page 315: ... further retrace the steps from that point as described in the text Pressing the F2 Default key will return the X or Y scale to the values specified in the setup This is a quick and easy way to return all expanded and shrunken scales to that default value without the necessity of numerous keystrokes If the X and Y scales are already at the setup values when the F2 Default key is pressed the four f...

Page 316: ...wing the user to resume data collection Pressing Resume will resume data collection 14 1 8 2 3 Pressing F4 Overall will cause the screen to change from the spectra plot to the overall display as described in paragraph 14 1 8 3 and 14 1 8 4 below You can change back to the spectra plot by pressing F4 Spectra 14 1 8 2 4 Pressing F5 Restart will restart data acquisition Once pressed all data collecte...

Page 317: ...F2 will display the readings of all channels when Channel B reached its maximum value as shown below The default selection is channel A and the heading over the third column is reads MxChanA This will change to display the selected channel 14 1 8 4 2 Pressing the F2 Pause key will pause data acquisition Once pressed the sample count will stop and the menu will change to Resume allowing the user to...

Page 318: ...ns have been collected the Shut Down Engines screen shown on page 24 will be displayed If additional conditions require data collection the Select Condition banner screen is again displayed as shown in the following figure Notice that the condition for which you just collected and stored data now has an X immediately to the left of the defined condition This alerts the user that data has been coll...

Page 319: ...e Job If you would like to exit the job without the ability to resume it later you can press the F5 Quit Job key Either of these actions will cause the Shut Down Engines screen to be displayed as seen below If you are finished collecting data shut down the engine s per the manual instructions and use the F5 Continue key to mark the job complete and store it to memory 14 2 Resume Job The features i...

Page 320: ...3 Manage Jobs The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 14 4 Manage Setups The features in this section are common among all jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer ...

Page 321: ...h the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 8 15 2017 4 00 Updated with new behavior where the Select Condition screen is always presented even if there is just one condition Wilson 4 30 2020 4 10 Updated screenshots to reflect SP7 UI changes Added information about Tach Filter field Shively ...

Page 322: ...steps necessary to perform the overall vibration surveys function Viper II Cobra II The Overall Vibration Survey option allows the user to rapidly complete and store overall vibration surveys using the Overall Vibration Setup feature described in paragraph 15 1 1 below With the setup feature you may complete surveys on several different components without manually entering the setup data between s...

Page 323: ...pportunity to resume it Pressing the F1 Yes key will return you to the last logical in progress step of the job Pressing the F5 No key will proceed as described in the two examples below depending on your circumstances Select Setup List If you are starting a new job with previously defined setups available in the analyzer s memory the screen will automatically display the Select Setup List banner ...

Page 324: ...u to define and store an overall vibration survey job As shown in the figure below some fields in this screen have default values that appear automatically You can use this information if appropriate or input your own specific setup information using the keypad Refer to Chapter 3 Using the Gen II Analyzer if you are unfamiliar with using the keypad The analyzer will display the Overall Vibration S...

Page 325: ...minimum frequency field immediately to the right of the frequency units field Use the analyzer keypad to enter the minimum frequency of interest for this survey relative to the frequency units selected in paragraph 15 1 1 1 2 above If you desire a high pass frequency such as 40 Hz the minimum frequency field should reflect this as the minimum frequency of interest 15 1 1 1 4 Use the key to move to...

Page 326: ...age Consult the appropriate equipment maintenance manual for specific requirements of an overall vibration survey or for analysis guidelines 15 1 1 1 7 Use the key to move to the MaxValue field Toggle between the selections by using key The full scale indicates the maximum amplitude relative to the engineering units selected in paragraph 15 1 1 1 5 you reasonably expect to acquire or the maximum a...

Page 327: ...toggle between selections Make field entries in the fields using the keypad 15 1 1 2 2 In the Condition column use the analyzer keypad to enter a descriptive name for up to 15 conditions You may define up to 15 individual points at which you collect and optionally store data When defined these conditions are stored with the setup and are accessed when the setup is selected and set into motion 15 1...

Page 328: ...used Pulse is used when there is a pulse input such as a Phototach Lasetach or magnetic pickup This pulse input may be but is not necessarily a once per rev pulse The preference is actually a multi pulse per revolution input The D or S in the selection depicts either single ended S or differential D as required 15 1 1 3 2 The DESC column is the descriptive name for the tachometer input such as N1 ...

Page 329: ... divided into the known engine speed at that point For this purpose it is recommended to use the analyzer s Monitor Overall function see Chapter 19 as it is quick and easy to configure 15 1 1 3 5 Use the key to select the Tach Filter Type The options are for a Single pole filter a Double pole filter or None 15 1 1 3 6 Use the keypad to enter the Tach Filter Frequency Enter a numeric value equal to...

Page 330: ... but we highly recommend you fill in as much information as possible for ease of use in trending recall and storage Navigate move between the fields using the and keys All fields are entered from the keypad with the exception of the Pos Position field which is a selection field The position indicates the position on the airplane of the engine propeller or subcomponent Using the key select position...

Page 331: ...nfigured for use of an optical tachometer the information message Tach power is On will be displayed near the center of the screen This indicates that power to the optical tachometer is currently available to check alignment with the reflective target Press the F1 Tach Pwr key to turn off power to the optical tachometer when it not being used When all installations and connections are made and tac...

Page 332: ...microphone the Select channel to calibrate screen will be displayed as shown in the example below You MUST calibrate the microphone before every use Differences in temperature and pressure will affect the microphone readings if it is not properly calibrated Follow the steps below to properly calibrate the microphone 15 1 5 1 Select channel to calibrate 15 1 5 1 1 Highlight the channel to be calibr...

Page 333: ...ibels dB and the Reference Frequency in Hertz Hz as found on the calibrator Plug the microphone into the correct size adapter in the top of the calibrator Turn the calibrator on and press OK on the analyzer 15 1 5 2 2 After calibration the analyzer will display the Acoustic Sensor Calibration screen 15 1 5 3 Acoustic Sensor Calibration ...

Page 334: ...Press F5 Start Engine to continue If calibration has not been completed a warning message will appear giving you the option to calibrate the microphone or continue with the job 15 1 6 Start Engine Start the engine or component you are checking generator gearbox etc When the component reaches normal operating conditions speed temp etc press the OK key to begin acquiring data NOTE The F4 menu item C...

Page 335: ... 4 sensors with tach in Viper II only 1 2 sensors in Viper II and Cobra II 15 1 8 1 Fields displayed when viewing Overall 15 1 8 1 1 Samples Number of data samples collected by the analyzer An increasing numeric value will be displayed as soon as the screen is displayed 15 1 8 1 2 Channel Displays the descriptions entered in paragraph 15 1 1 1 59 for each vibration sensor and paragraph 15 1 1 3 fo...

Page 336: ... channels when Channel B reached its maximum value as shown below The default selection is channel A and the heading over the third column is reads MxChanA This will change to display the selected channel as shown in the screenshot below 15 1 8 2 2 Pressing the F2 Pause key will pause data acquisition Once pressed the sample count will stop and the menu will change to Resume allowing the user to r...

Page 337: ...channel entered in paragraph 15 1 1 1 9 15 1 8 3 3 Ovr Displays the overall reading for the affected channel 15 1 8 3 4 Minimum frequency Displayed at the lower left corner of the spectrum and represents the minimum frequency of the X scale as entered in paragraph 15 1 1 1 3 15 1 8 3 5 Frequency unit Centered at the bottom of the spectrum and is the frequency unit selected in paragraph 15 1 1 1 2 ...

Page 338: ...ssing the or keys Hold down the key for large and rapid incremental changes The value of the X axis frequency and Y axis amplitude will be displayed for the current position of the cursor Incremental values are determined by the number of lines of resolution specified in the setup screen Pressing the F2 Harmonic key will produce multiple harmonic cursors yellow boxes in screenshot below according ...

Page 339: ...e Pressing the F1 Expand key will expand the X or Y scale of the spectra in effect enlarging the viewing area You might think of this function as a Zoom Out feature The center of the Expanded view will be the position of the cursor prior to pressing the F1 key If the view is already at the maximum range of the specified scale range no scaling change will occur However the cursor will be displayed ...

Page 340: ... F4 View key will display another sub menu The Function keys will be identified by the descriptions assigned in paragraph 15 1 1 1 9 above with the F5 key being labeled All Pressing the F key below the name of the channel will enlarge the display of that plot to the full size of the screen The other plots will continue to gather data they will just be hidden from view Pressing F1 Options F3 View a...

Page 341: ...l conditions require data collection the Select Condition banner screen is again displayed as shown in the following figure Notice that the condition for which you just collected and stored data now has an X immediately to the left of the defined condition This alerts the user that data has been collected and stored for this condition This does not preclude you from selecting and acquiring new dat...

Page 342: ...ss F1 Pause Job If you would like to exit the job without the ability to resume it later you can press the F5 Quit Job key Either of these actions will cause the following screen to be displayed If you are finished collecting data shut down the engine s per the manual instructions and use the F5 Continue key to mark the job complete and store it to memory 15 2 Resume Job The features in this secti...

Page 343: ...ll jobs Because of this they are contained in Chapter 3 Using the Gen II Analyzer 15 4 Exporting Time Trace Reports For Vibration Surveys export the PWC Time Trace information of the job s as necessary by selecting Overall Vibration Survey from the Main Menu and pressing OK Select Manage Jobs and press OK Select Export PWC Time Trace and press OK ...

Page 344: ... when capturing multiple jobs on the same engine To set the starting run number for the second run add the number of conditions to the second job For example if the number of conditions is 4 then when exporting the second job set the starting run number to 5 Enter information into Recording Description field regarding the survey or engine condition and any additional PWC Export Details as necessar...

Page 345: ...01 Repaired broken reference links and added revision history table Berlin 1 20 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 8 11 2017 Time Trace Setup and Export Procedures incorporated Boyer 4 30 2020 4 10 Updated screenshots to capture SP7 UI changes Corrected ...

Page 346: ...onitor Spectrum The Monitor Spectrum function allows the user to rapidly set up the analyzer to acquire vibration data for troubleshooting verification of repair comparison of similar components or snap shot recording of pre or post maintenance conditions As with all monitor functions of the analyzer there are no provisions for storing reviewing or adding the monitored data to a report 16 1 1 Spec...

Page 347: ...f you want multiples of the fundamental frequency included in the frequency range determine to what extent that need is 1X 2X 3X and so on then extend the frequency range to include it For example 300Hz is the frequency of interest the fundamental frequency If you want 3X harmonics included in the frequency range you must multiply the fundamental frequency 300 Hz X the harmonic range 3X and arrive...

Page 348: ...K Consult the appropriate equipment maintenance manual for specific requirements of a vibration survey or for analysis guidelines 16 1 1 8 Use the key to move to the Blocks in Avg field Enter the number of data blocks you wish to be used in the calculations This is the total number of samples taken and then averaged before being plotted on the screen The default is four The valid range is 0 to 999...

Page 349: ...a minimum If you do not expect amplitudes in excess of what would normally be experienced for the equipment application set this field as low as possible while still allowing sufficient space to display the maximum limitations as stated above 16 1 1 12 Repeat paragraphs 16 1 1 9 through 16 1 1 11 for all channels you intend to use for this job 16 1 1 13 Use the key to move to the Sensor column for...

Page 350: ...keypad 16 1 1 19 The 100 Spd column is used to enter the rpm at 100 of component speed Use the keypad to enter the value in the 100 Spd field The example above shows 4800 and 10000 for N1 and N2 respectively This will cause the analyzer to also display the component speed in percent during data acquisition Therefore when used on an engine spool N1 or N2 for example the analyzer s indication will m...

Page 351: ...in the upper left above the Y scale This will display the modifier for the affected channel entered in paragraph 16 1 1 10 above 16 1 3 1 2 Channel description Desc Centered at the top of the spectrum and is the description for the affected channel entered in paragraph 16 1 1 14 above 16 1 3 1 3 Ovr Displays the overall reading for the affected channel 16 1 3 1 4 Minimum frequency Displayed at the...

Page 352: ...id incremental changes The value of the X axis frequency and Y axis amplitude will be displayed for the current position of the cursor Incremental values are determined by the number of lines of resolution specified in the setup screen Pressing the F2 Harmonic key will produce multiple harmonic cursors yellow boxes in screenshot below according to the specified frequency range When this key is pre...

Page 353: ...keys will change the F1 F2 F3 and F5 boxes to read Expand Default Shrink and Cancel respectively as shown in the following figure Pressing the F1 Expand key will expand the X or Y scale of the spectra in effect enlarging the viewing area You might think of this function as a Zoom Out feature The center of the Expanded view will be the position of the cursor prior to pressing the F1 key If the view...

Page 354: ...described in the text 16 1 3 2 2 Pressing the F4 View key will display another sub menu The F1 F2 F3 F4 keys will be identified by the descriptions assigned in paragraph 16 1 1 14 The F5 key will be labeled All Pressing the F key below the name of the channel will enlarge the display of that plot to the full size of the screen The other plots will continue to gather data they will just be hidden f...

Page 355: ...on key menu options to the channel select sub menu This allows the user to view all values in relation to the maximum values for the selected channel For example pressing F2 will display the readings of all channels when Channel B reached its maximum value as shown below The default selection is Channel A and the heading over the third column is reads MxChanA This will change to display the select...

Page 356: ...00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 4 1 2020 2 1 Update for UI changes in Software Pack 7 Addition of Tach Filter Info screenshots and minor typographical errors Shively ...

Page 357: ...ides for rapid acquisition of a clock angle and amplitude reading without defining and saving a setup This function allows for no storage of readings for future review It is not recommended that you use this function for the acquisition of measurements from tail rotors or other items that have a balance chart that utilizes a strobe light for phase clock angles Measurements acquired with this funct...

Page 358: ...selections in this field The available selections are IPS Inches Per Second mm sec millimeters per second cm sec centimeters per second mils 1 1000th of an inch microns 1 1000000th of a meter m s s meters per second squared and cm s s centimeters per second squared Use the key to move to the Modifier field Mod is short for unit Modifiers relevant to the vibration engineering units specified above ...

Page 359: ...5000 This scale refers to the number of engineering units of vibration amplitude specified in the previous field The full scale indicates the maximum vibration amplitude you expect to acquire or the maximum amplitude of interest Choose the amplitude that will adequately display the full amplitude of any specified limits as a minimum If you do not expect amplitudes in excess of what would normally ...

Page 360: ...ence links in footer and added Revision History table Berlin 1 21 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 4 1 2020 2 01 Update of screenshots for SP7 UI Added information about Tach Filter fields Shively ...

Page 361: ... necessary to perform the function 18 1 Monitor Magnitude and Phase The Monitor Magnitude and Phase function provides for rapid acquisition of a phase angle and amplitude reading without defining and saving a setup This function allows for no storage of readings for future review To use the Monitor Magnitude and Phase function do the following From the Main Menu banner screen select Monitor Magnit...

Page 362: ... selections are IPS Inches Per Second mm sec millimeters per second cm sec centimeters per second mils 1 1000th of an inch microns 1 1000000th of a meter m s s meters per second squared cm s s centimeters per second squared Use the key to move to the Modifier field Use the or keys to toggle through the available selections in the field which are Peak Pk Pk Peak to Peak Avg Average and RMS Root Mea...

Page 363: ...mum amplitude of interest Choose the amplitude that will adequately display the full amplitude of any specified limits as a minimum If you do not expect amplitudes in excess of what would normally be experienced for the equipment application set this field as low as possible while still allowing sufficient space to display the maximum limitations as stated above CAUTION Sensors connected to Channe...

Page 364: ...or the overall vibration condition of a system or component in a digital numeric display and can be toggled to produce a spectral view This function also provides the means to monitor under one set of criteria then quickly change those criteria and return to the monitor mode As with all monitor functions of the analyzer there are no provisions for storing reviewing or adding the monitored data to ...

Page 365: ...00 Hz in the center of the range The minimum might then be 250 Hz and the maximum 350 Hz for instance You might also consider other factors such as Harmonics If you want multiples of the fundamental frequency included in the frequency range determine to what extent that need is 1X 2X 3X and so on then extend the frequency range to include it For example 300Hz is the frequency of interest the funda...

Page 366: ...ber of engineering units of vibration amplitude specified in the Units field The full scale indicates the maximum vibration amplitude you expect to acquire or the maximum amplitude of interest Choose the amplitude that will adequately display the full amplitude of any specified limits as a minimum If you do not expect amplitudes in excess of what would normally be experienced for the equipment app...

Page 367: ... a Phototach Lasetach or magnetic pickup may be used with the Viper II Analyzer This pulse input may be but is not necessarily a once per rev pulse The preference is actually a multi pulse per revolution input The D or S in the selection depicts either single ended S which supplies power to the output for use with a Phototach or Lasetach or differential D which does not supply power at the tach de...

Page 368: ...n set the FACTOR to 1 and read the value for the applicable tach channel at a known stable engine speed The indicated tach pulse frequency can then be divided into the known engine speed at that point 19 1 2 6 Use the key to select the Tach Filter Type The options are for a Single pole filter a Double pole filter or None 19 1 2 7 Use the keypad to enter the Tach Filter Frequency Enter a numeric va...

Page 369: ...graphs 19 1 1 11 for each vibration sensor and 19 1 2 3 for each Viper II tach channel 19 1 3 1 3 Current Displays the current values for each channel configured 19 1 3 1 4 MxChan x Displays the maximum values recorded for the indicated channel 19 1 3 1 5 Units Displays the unit of measure selected in paragraph 19 1 1 6 above for each sensor channel configured 19 1 3 1 6 Speed Viper II only Displa...

Page 370: ...t resetting any values 19 1 3 2 3 F4 Spectra When pressed the display will change to show the spectra plot as shown in paragraph 19 1 4 below 19 1 3 2 4 F5 Restart will reset all of the recorded values to zero and begin the sample count again 19 1 4 Collecting Data with Spectra After pressing the F4 Spectra the spectra is displayed If multiple sensors were configured the display will be divided in...

Page 371: ...ed at the lower left corner of the spectrum and represents the minimum frequency of the X scale as entered in paragraph 19 1 1 4 19 1 4 1 5 Frequency unit Centered at the bottom of the spectrum and is the frequency unit selected in paragraph 19 1 1 3 above 19 1 4 1 6 Maximum frequency Displayed at the lower right corner of the spectrum and represents the maximum frequency as entered in paragraph 1...

Page 372: ...the X horizontal axis of the spectra by pressing the or keys Hold down the key for large and rapid incremental changes The value of the X axis frequency and Y axis amplitude will be displayed for the current position of the cursor Incremental values are determined by the number of lines of resolution specified in the setup screen Pressing the F2 Harmonic key will produce multiple harmonic cursors ...

Page 373: ...ill return to Options Resume Overall and Restart respectively If no cursor is displayed when pressing this key only the box nomenclature will change Pressing the F2 X scale or F3 Y scale keys will change the F1 F2 F3 and F5 boxes to read Expand Default Shrink and Cancel respectively as shown in the following figure Pressing the F1 Expand key will expand the X or Y scale of the spectra in effect en...

Page 374: ...ccur However the cursor will be displayed and the X Y and Ovr Overall values will be shown in the upper right corner of the screen The F1 F2 F4 and F5 boxes will return to Options Resume Overall and Restart respectively If you wish to Shrink the X scale even further retrace the steps from that point as described in the text Pressing the F4 View key will display another sub menu The F1 F2 F3 F4 key...

Page 375: ...e links in the footer and added revision table Berlin 1 22 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 4 30 2020 2 10 Updated Screenshots to reflect SP7 UI changes Added verbiage for Tach Filter Shively ...

Page 376: ...hod of checking blade track independent of the Main Rotor Track and Balance menu item Data from this function is not stored in the analyzer The Check Track function can be performed using either an industry standard strobe for visual blade tracking or the ACES Systems Model 550 TraXTM Before using the Check Track function on the analyzer you must first install physical equipment such as cables and...

Page 377: ...do the following NOTE The Track Device selection will determine the fields necessary for that device Not all fields are required for every device and therefore some fields may be omitted from the display Select Check Track from the Main Menu banner screen The Check Blade Track banner screen appears as shown in the figure below Use the key to select rotor configuration Use the key to toggle between...

Page 378: ...the measurement units you would like to use for the Main Rotor Diameter ONLY Track elevation lead lag units and adjustment units are all set in separate locations Refer to the Model 550 TraXTM operational supplement P N 75 900 4043 for additional details as necessary Use the key to move down to the Lead Lag Units field Use the key to select the measurement units you would like to use for the Lead ...

Page 379: ...iguration above the TraXTM will automatically begin taking data As long as the Tach and Ready lights continue to flash the unit is actively collecting data When the Tach and Ready lights extinguish the Check Track Results screen will appear as shown in the sample above The Check Track Results screen presents the blade tip path information in both a graphical and a numeric format The final percenta...

Page 380: ... blade with the active blade presented in color with a broken border see blade B1 above Inactive blades will be grey and have a solid border The and keys will change the elevation of the active blade icon Each press will move the blade icon 0 1 inches or 2 mm depending on the Track Units selected above It is not possible to enter Lead Lag values through this interface When finished press the F0 Ba...

Page 381: ...sed from the analyzer s Main Menu banner screen This function allows you to power optical tachometers to align reflective tape or simply check their function Viper II Cobra II 21 1 Test Tach Power Selecting the Test Tach Power menu item will bring up the Tach Power interface ...

Page 382: ...ll change the bottom line of the screen to display Tach Power TACH X where X indicates the selected channel thereby providing power to the selected channel The block just above the selected channel will also change appearance The button will become dark with light lettering indicating the channel to which the tach should be connected The tach will receive power and any output should be visible at ...

Page 383: ...ous Items 13 3 Revision History 1 22 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 4 1 2020 2 01 Updated screenshots for SP7 UI changes Shively ...

Page 384: ...tems three of which are used for identification of the analyzer The other items are user accessible and editable items All are described in the following sections NOTE Some options appearing in the following screenshots will not be available on all units as they are for development testing purposes only Viper II Cobra II ...

Page 385: ...ion list during a balance analysis procedure saving time during the procedure by eliminating the need to re input sensor data The Manage Sensors option also allows you to add edit and delete sensors from the analyzer s memory When the Edit function is selected the screen changes to the Select banner screen On this screen you may choose to Edit the information for any of the listed sensors that are...

Page 386: ...med list you do not need to proceed further If your sensor name does not appear then you must select F1 New or F4 Copy to add a new sensor name and specifications To preprogram a sensor in the analyzer s memory you will need the following sensor specifications which should be available from the data sheet supplied with your sensor The sensor s model or name that will be familiar to you and other u...

Page 387: ... will be listed on the specification sheet under something referring to Bias Voltage or similar If you do not know the IEP requirements of the sensor call ACES Systems and ask for Product Support The input type of your sensor Available selections are single ended and differential The correct selection here will reduce the noise and increase the accuracy of the sensor s measurement To add a sensor ...

Page 388: ...und on the Sensor s Specification Sheet from the manufacturer Valid entries are from 0 001 to 3000 0 mV The Reverse Polarity is a toggle selection field The two selections are Yes and No This is a special function that will only apply to a very few sensors available The selection should be toggled to No for the majority of cases The ACES 991V sensor uses the reverse polarity and is set to Yes If y...

Page 389: ...te instructions for creating reports can be found in Chapter 3 Using the Gen II Analyzer 22 1 3 Delete Sensor Select Delete from the Manage Sensors banner screen menu Next select a sensor to delete from the list that appears Only unlocked sensors will appear in this list The analyzer will display a message that asks Are you sure Press F1 to confirm Yes press F5 for No and to return to the Manage S...

Page 390: ... Use the to move to the Date Format field You may specify the date format you wish to use by using the key to toggle the selection to the format you wish to use Available formats are MM DD YYYY DD MM YYYY and YYYY MM DD where YYYY Year MM Month and DD Day Use the key to move to the Month field and enter the month Valid range is 01 through 12 Use the key to move to the Day field and enter the say V...

Page 391: ... to the location you wish to use Using the to move to the Sub Region field You may specify the sub region you wish to use by using the key to toggle the selection to the location you wish to use When you have made your entries press the F5 Save key to store these settings in the analyzer 22 2 2 Set Language Set language provides the ability to change the language text displayed in the analyzer and...

Page 392: ...lable language options Once the choice is highlighted press the OK key to save and continue in that new language 22 2 3 Set Power Off Timeout The Power off timeout will turn the analyzer off after the period of inactivity specified below is reached This will help conserve battery power To set the Power Off Timeout do the following ...

Page 393: ...th minutes line to appear Select a number of minutes between 5 and 60 This is the length of time of no activity after which the analyzer will automatically shut off Press OK to exit this screen and return to the Analyzer Settings menu 22 2 4 Set Screen Saver Timeout The Screen Saver Timeout will reduce the brightness on the display after the period of inactivity specified below is reached As soon ...

Page 394: ...ield with Yes selected will cause the Timeout length minutes line to appear Select a number of minutes between 1 and 60 this is the length of time of no activity after which the analyzer will reduce the brightness of the display to save power Press OK to exit this screen and return to the Analyzer Settings menu 22 3 Analyzer Information The Analyzer Information selection contains the specific info...

Page 395: ... paragraph 22 3 2 below Current information can be found at www AcesSystems com Press OK to exit the screen and return to the Analyzer Information menu 22 3 2 Analyzer Version Information The Analyzer Version Information screen displays all of the available software and hardware version information ACES Systems product support may ask for this information in helping to determine any issues that ma...

Page 396: ...n Use the keypad or the optional USB keyboard to enter information into these fields Entries here will appear on all reports created by the analyzer This screen will also show the Serial Number of the analyzer the Application Software version and date and time the calibration date and calibration due date Press the F5 Save key after all owner information has been entered into the appropriate field...

Page 397: ...Report screen pictured below When complete you will return to the Analyzer Owner Information screen The report will be added to the Pending Reports stored in the analyzer for transfer to the USB memory device 22 3 4 Battery Information The Battery Information function allows the user to check the overall condition of the battery to include charge status in percent voltage current temperature healt...

Page 398: ...lth condition of the battery There are five possible conditions Excellent Good Fair Poor and Very Poor Charge Cycles Number of charging cycles the battery has undergone over the life of the battery Current Charge mAh Current milliamp hour charge level of the battery Charge Capacity mAh Current available milliamp hour charge capacity of the battery Design Capacity mAh Original milliamp hour charge ...

Page 399: ...ons These are the terms and conditions you agree to for using the analyzer Highlight the menu item and press OK to display the agreement You may view the entire document on the analyzer by using the F5 Next key or you can save the document to a USB memory device by pressing the F2 Save key The document will be saved in the aces_legal folder on the USB memory device ...

Page 400: ...II Analyzers You may view the entire document on the analyzer by using the F5 Next key or you can save the document to a USB memory device by pressing the F2 Save key The document will be saved in the aces_legal folder on the USB memory device 22 5 Analyzer License Information The Main Menu items are purchased from ACES Systems and activated in the analyzer by entering specific license codes To ad...

Page 401: ...Drive menu item to add additional licenses to the analzyer You can either manually enter the license number into the License Key field shown below and press OK or Press the F1 Load Lic Load License key to load a license code from a USB memory device from the file named LicenseKeys txt Press the F5 Save key to save the entry in the License Key field ...

Page 402: ... active on the analyzer If you wish to add features to the analyzer please contact ACES Systems Global Solutions Specialists 22 6 Database Management The Database Management function allows you to manage data stored inside the analyzer s memory See the paragraphs below for help in making efficient use of the data stored inside the analyzer ...

Page 403: ...ollow the steps below Select Import Setups from USB Drive and press OK If you haven t already inserted a USB memory device into the analyzer the analyzer will prompt you to insert one The USB memory device must contain setups in the folder named aces_setups Then follow the onscreen instructions to add the setups to the analyzer The analyzer will automatically store them under the correct job menu ...

Page 404: ...e lost or deleted jobs from a previous database backup This will be useful in the event you want to review a job that has been erased from the analyzer and wish to view it or generate a report Select Restore jobs from USB Drive and press OK If you haven t already inserted a USB memory device into the analyzer the analyzer will prompt you to insert one The USB memory device must contain a database ...

Page 405: ...ge 22 6 3 Copy Database to USB Drive Copy Database to USB Drive allows you to create a complete copy of all jobs setups and sensors stored in the analyzer Product Support may ask you to perform this task if you are having trouble with a particular job or type of job The data can be analyzed to see if there is a configuration error or even a software bug causing problems Select Copy Database to USB...

Page 406: ... If there is a USB memory device in the analyzer the process will begin automatically If there is no USB memory device insert a USB memory device and follow the onscreen instructions to start the process When the copy is complete the analyzer will display the message shown below ...

Page 407: ...ion 22 6 4 Erase All Jobs A quick easy way to perform housekeeping and clean out memory in the analyzer is to Erase All Jobs from the analyzer This function will delete all of the jobs stored in the analyzer however the setups will remain intact for future use This is a handy way of recovering storage area after all of the necessary reports and backups have been completed without having to enter e...

Page 408: ...ot previously exported any information you want to save the data will be lost Press F1 Yes to erase the data or F5 No to return to the previous screen 22 6 5 Database Information In some cases you may want to know how much memory is used or remaining Product support may also ask you for information about your database This can all be found in the Database Information section of the analyzer ...

Page 409: ...d the necessary information press the F5 Continue key to return to the Database Management menu 22 6 6 Create Setup Report It is possible to generate a report which lists all of the setups stored in the analyzer their lineage in the case of setups copied from a master and their attributes This is accomplished by selecting the Create Setup Report menu item and pressing OK ...

Page 410: ...r 2020 After you start the process the analyzer will display a status message similar to the one below while it generates the report When the report is finished the analyzer will display the message below Press the F5 Continue key to return to the Database Management screen ...

Page 411: ...memory device from any menu which contains the F1 Xfer Rpt key See Chapter 3 Using the Gen II Analyzer or use the Transfer Reports menu item on the Analyzer Management menu described in paragraph 22 8 below A partial sample report is displayed below This report will be stored on the USB memory device in a folder called aces_reports in a PDF format It can be printed or opened directly from the USB ...

Page 412: ...n create a report that lists all job types stored in the analyzer by selecting the Create All Job Report menu item You may want to save a listing of all jobs and their status or Product Support may ask you to create the report for troubleshooting Select it and press OK to begin the process of generating the report ...

Page 413: ...r 2020 After you start the process the analyzer will display a status message similar to the one below while it generates the report When the report is finished the analyzer will display the message below Press the F5 Continue key to return to the Database Management screen ...

Page 414: ...memory device from any menu which contains the F1 Xfer Rpt key See Chapter 3 Using the Gen II Analyzer or use the Transfer Reports menu item on the Analyzer Management menu described in paragraph 22 8 below A partial sample report is displayed below This report will be stored on the USB memory device in a folder called aces_reports in a PDF format It can be printed or opened directly from the USB ...

Page 415: ...from the analyzer This device is formatted with a FAT32 file system to insure proper operation with the analyzer s file system If you need to use additional USB devices with the analyzer or need to reformat the original device it is strongly recommended that you format them with a FAT32 file system as described below Insert the USB Device into an open USB port on the face of the analyzer ...

Page 416: ...his process After you start the process the analyzer will display a status message Formatting USB with a status bar Once completed the USB memory device will have the aces_setups and aces_import folders created for easier use 22 7 Copy User Manual to USB A copy of this User s Manual is stored in the analyzer It is as current as the version of software installed in the analyzer You can download and...

Page 417: ...ice by using this menu item Simply insert a USB memory device into an open USB Port on the face of the analyzer and press OK to begin the process The Status Pane will show any pending reports which will be transferred to the USB memory device then stored in the aces_reports folder of the USB memory device From there after you move the USB memory device over to a computer you can open or print the ...

Page 418: ... the footer and added revision history table Berlin 1 20 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated with screenshots and corrections to minor typographical errors East 4 30 2020 2 10 Updated Screenshots to reflect SP7 UI changes Minor grammatical corrections Added information Shively ...

Page 419: ...imits and possible damage that may be incurred CAUTION The charger is built for indoor use only Do not expose the charger to the elements CAUTION Power requirements must be determined on an individual basis Operating the analyzer with the battery charger connected can affect the accuracy of the acquired readings The analyzer was not intended to be operated during the charging process 23 1 1 Batter...

Page 420: ...ut of direct sunlight Adjust the screen brightness to a lower level The analyzer is continually monitoring and displaying the battery capacity If the level is low the battery charge indicator turns red to indicate the battery should be charged before starting another run When starting or resuming a job when the battery is 10 or below the analyzer will issue a warning about low capacity If the leve...

Page 421: ...ged pins may cause problems with normal operation Check all connectors for evidence of damage Route cables away from all hot areas and electrical equipment If the cable is used while it is lying on the ground you may experience radio interference Secure the cable to the aircraft fuselage off the ground with duct tape to correct this interference Duct tape or wire ties are excellent for securing th...

Page 422: ... be increased to insure a good trigger If the indicated speed in the analyzer function becomes erratic or unstable at higher speeds increase the length or width as the case may be of tape so that the tape remains in the beam for a longer period of time during each rotation See paragraph 23 6 1 below for more details 23 5 Propeller Protractor The protractor is made of hard plastic If folded or crim...

Page 423: ...om the RPM column since this is the first speed greater than your intended balance speed of 2300 From this number follow the row across to 26 5 which is the first number higher than your intended tape location of 25 inches From 26 5 follow the column straight up to the top 2 inches This is the width of tape required for accurate readings at the intended distance and RPM level If your reflective ta...

Page 424: ...your sensor with the analyzer when returning it in for calibration The sensor will also be checked as part of the calibration procedure 23 8 Overload of Input Channels The analyzer features an OVERLOAD indicator to show when any of the signals received by the analyzer exceed the maximum input levels for that channel On occasion you may see the indicator come on momentarily This is normal for the s...

Page 425: ...speed source such as a mag pickup or coil etc Single ended input configuration should typically be used for most vibration sensor inputs Single ended is required to provide a good ground reference return for the analog signal Some sensors are differential but external ACES charge amplifiers convert the sensor output differential charge to single ended ground referenced voltage 23 10 TraX The TraX ...

Page 426: ...plays of the various types of data that can be acquired using the Gen II Analyzers 24 1 Reading the X and Y Plotted Vibration Spectrum A graphic spectrum display allows the user to investigate all aspects of a rotating component related to vibration In the figure above the primary indicators are the plotted peaks that represent component vibrations ...

Page 427: ...ration above appears in several analyzer functions such as Propeller Balance Rotor Track and Balance Fan Trim Balance and IPS and Clock functions The scale is graduated along the right vertical side of the indicator from 0 at the bottom to the upper end of the scale which is determined by the FSR Full Scale Reading setting The vertical indicator bar which begins at the bottom and continues upward ...

Page 428: ...e quality of the collected data to this point When amplitudes are high this error will average down to or near 0 00 very quickly As the amplitude is decreased due to the balancing process the value will be slower to average down toward 0 00 This is not a fault or defect in the analyzer but only an indication of the averaged data quality relative to the current vibration being produced by the compo...

Page 429: ...lity of the measurement may be reduced Complete Press OK highlighted green This message will appear when a minimum number of consistent samples have been collected Allow the unit to collect data as long as the error continues to decrease This will insure you have the most accurate data possible Use the OK key to exit this screen and store the reading 24 2 5 RPM Warnings For Run 1 the RPM heading i...

Page 430: ... The Polar chart is a circular graph on which data points are displayed using the angle and the distance from the center point The X axis is located on the boundaries of the circle and represents the phase or clock angle of the vibration The Y axis connects the center of the circle with the X axis and represents the vibration magnitude 24 3 1 Phase Angle Polar Chart The phase angle Polar Chart as ...

Page 431: ...0 20 increments 24 3 2 Clock Angle Polar Chart The clock angle Polar Chart as shown in the illustration below appears in most rotary wing based analyzer functions such as Main Rotor Track Balance Tail Rotor Balance and Monitor Magnitude and Clock The X axis of the clock angle chart is a full 360 degrees and divided into 30 degree increments represented by whole clock hours The Y axis range is from...

Page 432: ...e values under the Average heading The circle will respond in real time as these values update A blue circle will be displayed when the Vib magnitude is below 1 00 When the Vib magnitude exceeds 1 00 the circle will become red and plot on the polar chart s outer most ring at the averaged Phase angle Blue circle Vib Magnitude below 1 00 Red circle Vib Magnitude above 1 00 24 3 4 Numerical Values Th...

Page 433: ...escribed in paragraph 24 2 3 above 24 3 6 Status Messages The top line of this screen can display four different status messages These messages are described in paragraph 24 2 4 above 24 3 7 RPM Warnings The RPM warning messages are described in paragraph 24 2 5 above 24 3 8 Multiple Vibration Channels If multiple vibration channels are configured the F4 Prev and F5 Next function keys will become ...

Page 434: ...tion of the Polar key and the type of chart will depend on the analyzer function being used 7 The vibration will be indicated by a circle displayed at a location on the polar that corresponds with the numerical values in the Mag and Deg columns on the left As the job continues each successive run will be displayed in a single polar allowing you to visually track the balance progress The first run ...

Page 435: ... with each job function The only standard function key when reviewing data in a polar chart is the Review key Its location will vary but will always return you to the default Review screen Other keys available include Actual Displays a polar chart indicating the installed or Actual weight placement as entered by the user Actual will be displayed in the banner at the top of the screen Once pressed ...

Page 436: ...hannels are configured the Vib Channel message will appear on the screen Pressing the or keys will cycle through the available channels Polar Chart displaying Vertical vibe channel Polar Chart displaying Lateral vibe channel 24 3 12 Multiple Conditions If multiple vibration channels are configured the Condition message will appear on the lower right portion of the screen Pressing the or keys will ...

Page 437: ...015 1 01 Updated broken chapter reference link in the footer and added revision history table Berlin 2 12 2016 2 00 Major rewrite generalizing the manual to cover both the Viper II and Cobra II This chapter was updated to include Polar Charts and corrections to minor typographical errors East 4 30 2020 2 10 Updated screenshots to reflect SP7 UI changes Minor grammatical changes Shively Underwood ...

Page 438: ...e 98 dB 98 dB Environmental Operating Temperature 4 to 120 F 20 to 49 C Relative Humidity 10 85 non condensing AC Input The data acquisition system is capable of measuring AC values to 9 5V Peak Peak Sensor Types The analyzer will accept any vibration signal input acceleration velocity or displacement The input is then displayed as collected or integrated to any other vibration unit The vibration ...

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