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Section 4 — Measurement Types and their Uses

52

Demodulation

The  demodulation  process  looks  for  repetitive  patterns  created  by
impact  events  that  lie  embedded  within  a  time  waveform.  The  process
works  by  extracting  the  low  amplitude,  high  frequency  impact  signals
and  then  tracing  an  'envelope'  around  these  signals  to  identify  them  as
repetitions  of  the  same  fault.  The  resulting  spectrum,  with  the  low
frequency  data  removed,  will  now  clearly  show  the  high  frequency
impact  signals  and  harmonics.

Demodulation is also useful as an early warning device as it detects
bearing tones before they are visible in a normal spectrum.

The  high  frequency  signals  that  demodulation  aims  to  extract  are  very
localized,  therefore  extra  care  must  be  taken  to  ensure  the
accelerometer  is  set  up  correctly.  Ensure  that  the:

•

Accelerometer is mounted close to the signal source.

•

Accelerometer  is  well  coupled,  using  either  stud  mounting  or  a
very  strong  magnet  on  bare  metal.  A  handheld  probe  or  stinger
is  NOT  recommended.

•

Accelerometer mounting is consistent between visits, otherwise
trend plots of overall RMS values will be meaningless.

The  bandwidth  you  select  determines  which  range  of  frequencies  the
demodulation  process  will  use.  If  possible,  your  instrument  will  suggest  a
suitable  demodulation  bandwidth  using  the  machine's  default  RPM
when  configuring  a  demodulation  recording.

For  most  standard  speeds  (above  1000  RPM),  a  bandwidth  of  2  -  10  kHz
will  typically  be  recommended  and  automatically  selected  when  you
open  the

Bandwidth

window (

Bandwidth

after selecting a

measurement type of

Demod

).

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Содержание SCOUT100-Ex

Страница 1: ...SCOUT vbSeries Instrument Reference Guide SCOUT100 Ex SCOUT140 Ex vb5 vb6 vb7 vb8 25 September 2014 ...

Страница 2: ...document including but not limited to implied warranties for the document s quality performance merchantability or fitness for any particular purpose Neither GE Energy New Zealand Ltd nor its employees dealers agents or distributors shall be liable to the user of this document or any other person or entity with respect to any liability loss or damage caused or alleged to be caused directly or indi...

Страница 3: ...re not member states of the European Union who are in control of the product at the end of its life or at the end of its use are solely responsible for the proper disposal of the product No person firm corporation association or agency that is in control of product shall dispose of it in a manner that is in violation of any applicable federal state local or international law GE Energy New Zealand ...

Страница 4: ...ATING OVERVIEW 18 Onsite Analysis 19 Recording Routes 20 Balancing 21 Keypad Entry 22 SECTION 2 INSTRUMENT FUNDAMENTALS 23 SWITCH INSTRUMENT ON OR OFF 23 USE MAIN MENU 24 RETURN TO PREVIOUS MENU 24 USE NAVIGATION KEYS AND ICONS 24 SELECT MENU ITEMS 26 Select Option 26 Jump To End of List 26 Scroll through Multi column List 27 Cancel Option 27 Display Hint Labels and Detailed Help 28 Display Altern...

Страница 5: ...US AVERAGING 59 BUMP TEST 60 COAST DOWN RUN UP 61 Tips for Coast down Run up recordings 61 Deactivate Saving Waveform Data for Coast down Run up Measurement 62 Take Coast down run up Measurement 63 CROSS CHANNEL PHASE 64 Recommendations for Cross Channel Phase 65 Fault Types and their Phase Relationships 66 Measuring Cross Channel Phase 69 Setup 69 Measure Cross Channel Phase 70 1 Plan Cross Chann...

Страница 6: ...annels 107 Save Multi channel Measurements 108 SECTION 5 SET MEASUREMENT OPTIONS 110 SET MEASUREMENT UNITS AND SPECTRUM SCALING 110 SET MEASUREMENT PARAMETERS 112 CREATE YOUR OWN PARAMETER SETS 114 ASSIGN SENSORS TO CHANNELS 115 SPECTRUM PARAMETERS 116 Fmax 117 Spectral Lines 118 Fmin 118 Tach Trigger 118 Averaging 118 Number of Averages 119 Averaging Types 119 Average Overlap 119 Windowing 120 Ch...

Страница 7: ...38 Zoom 139 VIEW MULTIPLE CHARTS 140 Select Chart 140 Display Single Chart 140 CHANGE CHART VIEW 141 Select Chart Layout 141 Change Multi chart Layout Display 141 SET Y AXIS AMPLITUDE SCALE 142 Fixed Y Axis scale options 143 AMPLITUDE DISPLAY UNITS 144 vdB 145 adB 145 SET RPM 145 Enter RPM manually 145 Enter RPM using 1X peak 146 VIEW ORDERS 147 VIEW REVOLUTIONS 148 SAVE MEASUREMENT 148 Save to Ex...

Страница 8: ...ur smart phone 167 UFF EXPORT 168 SECTION 9 WORKING WITH ROUTES 169 WHAT IS A ROUTE 169 WALKTHROUGH TAKE RECORDINGS USING ROUTE 170 USE BAND ALARMS AND BASELINE OVERALLS ON ROUTE 173 View Alarm Bands Configured in Ascent 175 RECORD MULTIPLE CHANNELS ON ROUTE 176 Axis Mode 177 Point Mode 178 Complete Setup 179 TRIAXIAL MEASUREMENTS 179 ENTER MACHINE SPEED ON ROUTE 182 View Machine and Point Speed D...

Страница 9: ... Define or Edit Sensors 205 Bias Voltage Check 207 Set Default Sensor 208 Change Sensor Temporarily 209 Change Default Sensor 209 Delete Sensor 209 NOTES 209 Create Note 210 Edit Note 210 Attach Note 211 View Note 211 Detach Note 211 Delete Note Permanently 212 DELETE ALL RECORDINGS IN FOLDER 212 DELETE ALL STORED INFORMATION 213 SECTION 11 BALANCING ROTORS 214 METHODS FOR BALANCING ROTORS 214 BAL...

Страница 10: ...SET UP NEW BALANCE JOB 234 STEP 2 TAKE INITIAL READING 235 STEP 3 TAKE TRIAL READING 237 STEP 4 BALANCE ROTOR 240 STEP 5 PERFORM TRIM BALANCING 241 STEP 6 VIEW OR SAVE BALANCING JOB 242 Save balance job 243 SECTION 13 GENERAL SETUP OPTIONS 244 SET DATE AND TIME 244 Adjust Date or Time Format 245 SELECT LOCAL TIME ZONE 245 DAYLIGHT SAVING AUTOMATIC ADJUSTMENT 246 ADJUST SOUND VOLUME 247 SET INSTRUM...

Страница 11: ...Reformat Memory Card 256 Empty Recycle Bin 257 Overwrite Primary Database with Mirror Backup 258 DISPLAY SYSTEM INFORMATION 259 UNLOCKABLE FEATURES 260 UPGRADE INSTRUMENT FIRMWARE PROFLASH 261 PROFLASH PROCEDURE 262 SECTION 14 TROUBLESHOOTING 263 RESET INSTRUMENT 263 TROUBLESHOOT NETWORK COMMUNICATIONS 264 Set Ethernet Network Address 265 Reset Network Values to Factory Default 265 ETHERNET CONNEC...

Страница 12: ...for future reference This guide applies to the following instrument models SCOUT100 Ex SCOUT140 Ex vb5 vb6 vb7 vb8 Although this guide makes use of common vibration analysis and balancing concepts it is not intended as a comprehensive guide or training manual Please ensure you have the relevant knowledge and experience to carry out the procedures described It is essential to follow all appropriate...

Страница 13: ...eceive a license for it which you can activate via Ascent If you purchase a Flex feature you can easily review the licensing status of these at any time To do this 1 Press Options 2 Press Model Features MORE Contact your local sales representative to arrange a license for a feature you wish to add MORE Refer to your Ascent Reference Guide to learn how to apply our license in Ascent Checking the li...

Страница 14: ...ed to support the addition of Flex features 1 Press Options 2 Press Memory System The Flex Capable listing at the bottom of the screen indicates either Yes or No MORE Contact Commtest Support if your instrument is currently not set up to support Flex features Determining whether your instrument is currently set up to support the addition of Flex features ...

Страница 15: ...tive to magnetic fields near the magnetic mounting bases e g cardiac pacemakers credit cards floppy disks video tapes audio cassette tapes or mechanical watches Explosion Hazard When working in a hazardous area with risk of flammable gases all precautions and limitations explained in the following Hazardous Locations section must be followed Do NOT detach the battery pack from the instrument for m...

Страница 16: ...ument with new firmware PROFLASHING the instrument will delete all stored information To obtain accurate measurements ensure the drive current is switched on when using an IEPE ICP type accelerometer Mount the sensor correctly before taking measurements This will ensure your readings are accurate and consistent Use a mild detergent diluted with warm water to clean your instrument Do NOT use abrasi...

Страница 17: ...ut confined within closed systems from which they can escape only in case of accidental rupture or abnormal operation or in which ignitable concentrations of gases are normally prevented by positive pressure or mechanical ventilation and which might become hazardous through abnormal operation of the ventilation equipment The approval specifically covers use in the United States of America and any ...

Страница 18: ...Section 1 Introduction 7 Installation Control Drawing for Hazardous Locations ...

Страница 19: ... G Gas Protection method ic intrinsic safety for zone 2 Explosion Group IIB gases such as Ethylene Temperature Class T4 surface will not exceed 135 C Protection level c Zone 2 The approval covers use in Europe under ATEX and any other countries that recognize the IECEx certification When using a certified instrument in a hazardous location the installation must comply with the following Installati...

Страница 20: ...Section 1 Introduction 9 Installation Control Drawing GE2214VBX for ATEX Hazardous Locations ...

Страница 21: ...Section 1 Introduction 10 IECEx ATEX Declaration of Conformity ...

Страница 22: ...Flash Drive 3 USB socket Provides a data connection between the instrument and an Ascent software host computer 4 Charger power socket 12 Volt 3 Amp input Enables you to power the instrument and charge the its battery pack 5 BNC sensor input Channel 1 6 BNC sensor input Channel 2 7 LEMO four pin tachometer input IMPORTANT Ensure the protective rubber cover is securely fastened over the instrument ...

Страница 23: ...s for each key In some menus keys can perform several functions To see the available options press ALT and toggle the key functions Help key Access easy to see hint labels A long press displays detailed contextual help text Navigate up down through a list Press and hold to move more rapidly through a list Navigate left right Expands and collapse a level in the navigator and directs movement betwee...

Страница 24: ... Charging RED Indicates the instrument battery is charging Danger RED Illuminates when A DSP or critical error occurs A measurement is less than 25 or greater than 200 of the preset baseline value MORE See Baseline Recordings The sensor bias voltage is outside the specified range Alert AMBER Illuminates when a measurement is less than 50 or greater than 150 of the preset baseline value OK GREEN In...

Страница 25: ...0 240 Volt 50 60 Hz NOTE You can also use the optional car adapter charging lead to charge the battery pack in a vehicle with a 12 V negative chassis power system 3 Connect the adapter s DC output to your instrument s charger power socket The instrument s Power Supply and Charging LED indicators illuminate to indicate that the instrument is charging NOTE The battery will be fully charged in approx...

Страница 26: ...ed the battery is functioning correctly Your instrument includes a number of features that help ensure the battery pack is always sufficiently charged The table outlines the battery behavior in its different states Battery state Behavior Below 7 Volts Instrument automatically switches off the back light to prevent further power drainage It displays a flashing battery icon to indicate the battery n...

Страница 27: ...is will cause the instrument date time to be reset Stored measurement data or recordings will NOT be lost WARNING Ensure power is NOT supplied to the instrument when you remove the battery Unplug any connected power adapters before removing the battery WARNING You should NOT re insert a damaged battery in your instrument Dispose of damaged batteries responsibly and in accordance with local regulat...

Страница 28: ...ime 5 Move the cable joints to determine whether there is an intermittent short Consistent data e g a straight line indicates the cable is working correctly Varying data e g a varying line indicates there is a problem with the cable TIP You can view the data that displays for a particular channel in more detail To do this press to toggle and select the channel you wish to view Press to access an e...

Страница 29: ... can use your instrument to Take live free run measurements for onsite analysis of vibration spectra and waveforms Record routes and store vibration data for transfer to a PC off site analysis Use keypad entry to enter additional machine information and process inputs Balance machines using single and dual plane methods ...

Страница 30: ...a onsite immediately This is ideal for one off investigations that fall outside your regular scheduled monitoring route To do an onsite analysis 1 Set measurement parameters on your instrument 2 Measure and analyze the spectrum or waveform 3 Record the data to memory optional 4 Transfer the data to your computer for further analysis optional ...

Страница 31: ...it to your instrument Recording routes is particularly useful if you routinely monitor a large number of machines It enables you to build up a history of machine states and conditions over time To record a route 1 Create a recording route on your computer MORE See the Ascent Reference Guide for instructions 2 Transfer the route to your instrument 3 Collect data for each item on the recording route...

Страница 32: ...lance 2 Attach a trial weight to the balancing plane 3 Take another measurement TIP For dual plane balancing do the same for the second plane 4 Attach correction weights to the balancing planes as recommended by your instrument 5 Take a measurement in each plane to confirm the rotor is balanced NOTE You can use Trim Balancing to remove any residual imbalance TIP You can swap the display so that th...

Страница 33: ...lude keypad entries in a route your instrument will prompt you to enter values at specific points along the route Keypad entries can also be used as onscreen reminders to perform machine checks e g for checking temperature and pressure To collect and record entries using the keypad 1 Create keypad entries as part of a recording route 2 Transfer your entries to your instrument 3 Enter the values fo...

Страница 34: ...nt on or off NOTE If your instrument is switched on and it has a battery state above 25 it will enter Sleep mode when you press the power button If the battery has less than 25 charge remaining your instrument will enter Complete Powerdown Mode when you switch it off When you switch your instrument on the main menu displays the following details The remaining battery charge amount Today s date and...

Страница 35: ...o Previous Menu You can press the cancel button to return to the previous menu If you have opened several submenus pressing this key will return you to each previous menu item You can press and hold the cancel button to return to the main menu Use Navigation Keys and Icons You can use the arrow icons on the keypad and screen to Navigate backwards and forwards through menus Move up and down and acr...

Страница 36: ...highlighted machine structure to show its points locations and parameter sets Move to the right of the screen in a split screen menu Collapse the highlighted machine structure so that only the top level displays Move to the left of the screen in a split screen menu When you are working with large numbers of machines you can use the collapse icon to collapse the machine structures displayed This wi...

Страница 37: ...Select Option To select an option from a list 1 Use the arrows keys to move the selection bar until your option is highlighted 2 Press to select the required option Using the arrow keys to navigate to the required menu item Jump To End of List Left and right arrows display on the right of your screen when several menu options are available If required you can Press to jump to the first list entry ...

Страница 38: ...rm Left and right arrows display on the right of the screen 5 Press button to select the first list entry or button to select the final list entry Using the left and right arrows to navigate to the required menu item Scroll through Multi column List You might find lengthy lists displayed in several columns Where this happens you can jump across columns and scroll up or down Cancel Option You can p...

Страница 39: ...he hint labels and more detailed snippets of help 1 Open the main menu TIP Press and hold the cancel button to return to the main menu from a submenu you have open 2 Open the required menu e g press button to open the Record Review menu 3 Press the help key to display the associated hint labels 4 Press and hold the help key to display more detailed help 5 Press the help key again to hide the detai...

Страница 40: ...Section 2 Instrument Fundamentals 29 Viewing hint labels Accessing more detailed help ...

Страница 41: ...eral of the menu options one key can perform more than one function When an additional menu option is available an icon will display at the top of the screen You can press the key to access a different set of options View of menu before pressing View of menu after pressing ...

Страница 42: ...e number 7 press four times You can insert spaces between words change from upper to lower case and delete or insert special characters as required Pressing to display hint labels will help you use the various editing commands TIP If you press a different key the cursor will jump to the next space If you need to use a character that is on the same key as the previous character pause for a moment u...

Страница 43: ...ear the current folder name 5 Press the buttons provided to select the required letter EG Press three times to enter the letter F 6 Press to enter a space between words 7 Press to access the punctuation options 8 Press Press to display the advanced editing menu You can use this to change case delete characters and more 9 Press to save your changes once you have finished entering text Entering char...

Страница 44: ...Section 2 Instrument Fundamentals 33 Using the advanced options ...

Страница 45: ...ists the additional icons you can use to manage your machines Icon Function Create a new machine Create a new point Create a new location Create a new parameter set The table lists the additional icons you can use to manage any item Icon Function Create a new item Edit the selected item Delete the selected item Copy the selected item into memory Paste the copied item to the highlighted position ...

Страница 46: ...sor cable plug from a BNC connector grip the end of the cable plug gently twist it anti clockwise and pull it up WARNING Do NOT pull the sensor cable to remove the BNC connector Doing this can damage the cable Mount Sensor The sensor mounting you choose will affect the accuracy and therefore repeatability of your vibration measurements For walkathon data collection accelerometers are usually mount...

Страница 47: ...ccelerometer on lightweight motors or similar parts as the weight of the accelerometer will distort the vibration signal Use a smaller accelerometer for small structures To avoid distorted signals attach the accelerometer as closely as possible to and in line with the centerline of the bearings The mounting surface should be flat and smooth where the accelerometer makes contact Attach the accelero...

Страница 48: ... shown in the diagram below to prepare a mounting spot on the machine 2 Unscrew the magnetic base from the sensor 3 Screw the sensor onto the threaded stud TIP We recommend you use a thread locking compound CAUTION Do NOT use a wrench to tighten the accelerometer This may damage the sensor Stud mounting spot ...

Страница 49: ...nting base articulated arm 2 Plug the cable socket into the tachometer connecting pins Turn the locking ring to make the connection secure 3 Locate the TACH input on your instrument Attach the other end of the cable to this the LEMO end 4 Stop the rotor 5 Cut out a small strip of the reflective tape supplied approximately 5 mm x 15 mm 0 2 x 0 5 6 Stick this piece of reflective tape to a machine pa...

Страница 50: ...ing the supplied tachometer The screen will display the rotor running speed in RPM and Hz These values will continuously update but should stabilize indicating that the tachometer is triggering reliably If the RPM does NOT stabilize adjust the position of the tachometer Ideal sensor positioning Preparing to take a tachometer reading ...

Страница 51: ...hometer There are two additional Keyphasor voltage threshold levels making it easier to choose an appropriate threshold for the machine s Keyphasor probe gap The previous single threshold level was found to be incompatible with some Keyphasors that had non standard gap settings When you take a recording using a Keyphasor tachometer your instrument will let you know if a recording is tach triggered...

Страница 52: ...will average away the non synchronous peaks This is not ideal when you are trying to find rolling element bearing faults Additionally in Tach Trigger mode the tach signal must be present This means the recording cannot be completed if the tach is disconnected or faulty In contrast RPM Only mode records the speed if this is available Consequently if the tach signal is not present the recording is s...

Страница 53: ...rement type Press 4 Press Tach 5 Select the required threshold 6 Press Tach to select ONE of these options RPM only If you only want to record the machine speed if available and do NOT require phase data tach triggering or time synchronous averaging Triggered If you want to capture phase and or perform time synchronous averaging You can also select this option if you are recording an Orbit plot an...

Страница 54: ...Section 3 Sensors 43 Selecting the appropriate voltage for your tachometer and machine ...

Страница 55: ...ur instrument scans through the 3V 8V 13V and 18V threshold levels displaying the RPM value detected at each one 4 Use the keys provided to select the threshold that delivers a stable RPM reading and matches the expected speed of the machine you are testing The threshold value you selected will be used for all subsequent recordings on the machine you are measuring NOTE Your instrument will increas...

Страница 56: ...ect it to the tachometer input of your instrument If your strobe light has a BNC connector and a TTL output 0 to 5 V you can purchase a suitable cable with a LEMO connector from your distributor MORE For more information on other types of connectors and signals see Strobe Output and the Frequently Asked Questions ...

Страница 57: ...vibration frequency The vibration spectrum of a machine component shows the frequencies at which the component is vibrating and the amplitude of vibration for each of these frequencies Spectra consist of discrete spectral lines displayed at fixed frequency intervals The height of each spectral line represents the amplitude of vibration at that frequency The more spectral lines in a spectrum the hi...

Страница 58: ...ing so will ensure all crucial information is captured To set these parameters 1 Open the main menu 2 Press to access the Measure menu 3 Press to access the Spectrum Waveform 4 Use the arrow keys on the left to select an existing parameter set or press to create a new set Set the parameters as required 5 Press to start measuring ...

Страница 59: ...y only support frequencies below approximately 80 Hz 4800 CPM NOTE This feature requires a LEMO to strobe LEMO to twin 3 5 mm plugs cable and a suitable externally controllable strobe lamp Ensure you connect only one 3 5 mm plug at a time either the black Read or red Drive plug Connecting both Read and Drive plugs to the strobe s input and output sockets will typically force the strobe into extern...

Страница 60: ...een 9 Press twice to start the measurement 10 Wait until the spectrum measurement stabilizes 11 Use the Cursor Left and Cursor Right keys to move the dotted vertical cursor line to a spectral peak below 140 Hz 8400 CPM TIP For more precise positioning of the cursor zoom into the spectrum display using the X Axis Zoom key NOTE The 1X peak should typically be the largest peak on normally functioning...

Страница 61: ...sor you must exit the spectrum measurement screen Read Speed of Connected Strobe To read the speed of a connected strobe 1 Connect the LEMO to strobe cable s LEMO plug to your instrument s tachometer socket 2 Connect the black Read 3 5 mm to the strobe lamp s output socket Ensure the Drive plug is disconnected and the strobe is set to Positive Signal Mode POS if required by the strobe model 3 Acti...

Страница 62: ...ory used The key parameters you need to set are the duration and number of samples The duration determines the equivalent Fmax value If you later transfer the waveform to Ascent and display it as a spectrum the Fmax value will be used on the chart The number of samples controls the number of spectral lines used when you transfer the waveform to Ascent and display it as a spectrum To access this me...

Страница 63: ...e very localized therefore extra care must be taken to ensure the accelerometer is set up correctly Ensure that the Accelerometer is mounted close to the signal source Accelerometer is well coupled using either stud mounting or a very strong magnet on bare metal A handheld probe or stinger is NOT recommended Accelerometer mounting is consistent between visits otherwise trend plots of overall RMS v...

Страница 64: ... suitable for the application In this case you can use the following steps to determine an appropriate bandwidth 1 Press Measure Press Spectrum Waveform to take a quick snapshot spectrum measurement 2 Press to create a new parameter set Set the store units to Acceleration and the Fmax to 20 000 Hz 1200 kCPM 3 Press to start measuring 4 Examine the chart for a region of broadband high frequency noi...

Страница 65: ...ots alarms fault frequencies bearings and gears Here are some points to remember when analyzing demodulation data Bearing tones that appear in the demodulated spectrum but NOT in the normal spectrum are a good early warning indicator of insufficient lubrication and other problems As the bearing deteriorates the baseline noise level increases and bearing tones develop running speed sidebands In the...

Страница 66: ...s to start measuring 6Pack 6Pack supports up to six measurements You can take these simultaneously from a single data stream channel across a maximum of three channels All standard condition monitoring data can be acquired in one step in the time normally required to take a single conventional recording A 6Pack recording may include some or all of the following measurement types for each recorded ...

Страница 67: ...amlined Parameter Settings The following simplifications have been applied to 6Pack measurements The sensor type must be Accelerometer The High Frequency and Demodulation measurements are measured in Acceleration units only All spectra and waveforms have the same resolution maximum 3200 lines 40 kHz for single channel and 1600 lines 20 kHz for dual channel The Demod Bandwidth upper limit is automa...

Страница 68: ... By contrast classic Demod relies on rectification and low pass filtering to achieve a similar result The new algorithm works very well over a wide range of impact signals but uses far less computing power than classic Demod This allows the 6Pack system to operate at full 40 kHz speed on two channels simultaneously providing twelve processed outputs The new algorithm has been carefully calibrated ...

Страница 69: ...t of balance level Connect the tachometer that will be used to measure the RPM Attach a vibration sensor if you wish to see the vibration amplitude 1 Press or Measure 2 Press Tach 3 Press to select the standard tachometer or Keyphasor sensor The Tachometer Reading menu will display a continuously updating RPM and the equivalent value in Hz 4 To see the amplitude and phase angle relative to the tac...

Страница 70: ...t and displayed as a spectrum this Fmax value will be used on the chart The number of samples controls the number of spectral lines used when the waveform is transferred to Ascent and displayed as a spectrum TIP We recommend you use 16 or more averages in order to remove non synchronous peaks from the final spectrum NOTE You must use a tachometer or Keyphasor to trigger your measurements To conduc...

Страница 71: ...p to ensure that suitable frequencies are injected into the structure without causing damage Bump test measurements are taken in free run mode and use peak hold averaging Your instrument will take continuous samples and update the peak value for each spectral line whenever a line exceeds its previous value To perform a bump test 1 Press or Measure 2 Use the arrow keys on the left to select Bump Te...

Страница 72: ... the RPM reading for each measurement as this will aid interpretation You can set the recording interval as a time interval between recordings or a change in machine RPM We suggest setting it to a change in machine RPM with the RPM Difference set to machine speed 20 This will result in approximately 20 recordings being taken during a complete coast down or run up Several recordings are taken durin...

Страница 73: ...g up the recording Doing so will enable you to take recordings much more rapidly during the machine coast down run up To deactivate this option and ensure only spectrum data is saved 1 Press or Measure 2 Locate and select the Coast down Run up measurement type Press 3 Press Spectrum Waveform 4 Press Spec Wfm repeatedly to toggle between EITHER of these options Spec Wfm Spectrum and Waveform data w...

Страница 74: ...rameters as required 5 Press Select the machine location to save measurements to 6 Press again to start measuring 7 After the first spectrum has been recorded switch off the machine or begin ramping its speed up or down 8 Once the machine has stopped rotating or its speed has been fully adjusted press to stop measuring and return to the Coast down Run up menu NOTE The measurement location will con...

Страница 75: ...ous machine faults will help confirm the existence of a specific machine fault and help prevent misdiagnosis Cross Channel Phase is a convenient method of taking phase measurements It does NOT require the use of a tachometer or reflective tape Instead phase is measured between two sensors NOTE When taking measurements be aware of the direction each sensor is facing If you are measuring across the ...

Страница 76: ...can use spectra to identify high amplitude peaks at specific frequencies 2 Position the channel 1 sensor in a location which has high vibration at this frequency Do NOT move this sensor once testing has started 3 Try out different locations with the channel 2 sensor noting the phase and amplitude relationships compared to the fixed channel 1 position 4 Repeat steps 2 and 3 at any other locations o...

Страница 77: ... the top to the bottom of the bearing housing or from one side to the other Imbalance General A high amplitude peak will appear at 1X the running speed Confirm that the phase difference from horizontal to vertical on the bearing is close to 90 40 The phase difference between left and right horizontal locations should be within 30 of the phase difference between left and right vertical locations If...

Страница 78: ...hines You can vary the machine speed to investigate resonance A phase shift of 180 will occur as machine speed is increased from below a resonance to above it A 90 phase shift will be present at the resonant frequency If a machine is running close to resonance any small speed variation will cause large phase shifts At a bearing Look for a change from the normal 90 phase difference in the horizonta...

Страница 79: ...line with the two belts Mechanical looseness General High amplitude peaks will show up at several multiples of the running speed and sometimes even multiples of 0 5X running speed e g 1 5X 2 5X etc Look for fluctuating phase readings at a location from one recording to the next Also compare the phase readings at 30 increments around a bearing housing The phase will be significantly different at ea...

Страница 80: ...e and coherence data Setup To select your preferred settings for a cross channel phase recording 1 Connect two sensors to the appropriate machine locations 2 Assign two sensors and enable both channels a Press Press Sensor Setup b Create or select your sensors as required c Press to continue NOTE The lowest channel will be used as the reference channel For example if you have enabled CH2 and CH3 C...

Страница 81: ...splay labels for the additional viewing options 5 Press to zoom in to the Y axis 6 Press to expand the Y axis 7 Press to zoom in to the X axis 8 Press to expand the X axis 9 Press to move the cursor left 10 Press to move the cursor right 11 Press to change the display of the sensor orientation NOTE The instrument will perform a spectral peak search on the reference channel at the frequency entered...

Страница 82: ...quency you are interested in 3 Taking recordings at the specific locations and directions used 4 Reviewing the data On your instrument In Ascent In Operating Deflection Software ODS such as ME scope MORE Contact your local sales representative for more details about this feature 1 Plan Cross Channel Spectrum ODS Recording Routine We recommend you draw a quick sketch of the machine you are investig...

Страница 83: ...s Channel Spectrum ODS Press 3 Select your preferred FRF unit Accelerance Mobility Compliance a Press Store Units b Use the navigation arrows to select your preferred unit Press NOTE This selection is the modal equivalent of choosing between acceleration velocity and displacement Consequently Accelerance is the better choice for very high frequencies while compliance is the better option for very ...

Страница 84: ...ou take your recordings NOT recommended 6 Press to access additional setup options a Press Number of Averages to change the default number of averages taken b Press Point Name Increment to change the default interval at which points will automatically increment c Press Average Overlap repeatedly to toggle and select the required percentage d Press Window to toggle between Hanning and Rectangular o...

Страница 85: ...Section 4 Measurement Types and their Uses 74 Selecting the required parameter settings ...

Страница 86: ...he machine where there is a strong vibration signal at all frequencies of interest Position your roving sensor according to the measurement plan you drew up 2 Select the required parameter set listed on the left 3 Press to start a recording with these parameters 4 Wait for the sensor to settle Recording will start automatically 5 Press or to display the cursor Use the navigation arrows to move the...

Страница 87: ...Rotor 1 Press b Press to specify the reference point you used during the recording Press c Press to select the point for the other channel you used Press d Press to specify the direction you used for your reference sensor Press e Press to specify the direction you used for your other sensor Press 9 Press to save your data and move to the next point or to exit Taking a Cross Channel Spectrum ODS re...

Страница 88: ... 4 Review Data Once you have taken Cross Channel Spectrum ODS recordings you can review your data On your instrument press or Record Review In Ascent In ODS software such as ME scope Reviewing a Cross Channel Spectrum recording on your instrument ...

Страница 89: ... s USB host port TIP Ensure the USB flash drive you are using has enough storage space and that any write protect tabs are unlocked 2 Press Folders USB Export on the main menu The USB Flash Drive screen opens NOTE If you have NOT yet attached a USB flash drive do this now and press USB Flash Drive 3 Press to export the data in Universal File Format UFF format 4 Use the navigation buttons to select...

Страница 90: ...Section 4 Measurement Types and their Uses 79 Exporting data to an external USB flash drive Importing data into ME scope ...

Страница 91: ...ng Time Waveforms Duration is the total amount of time available for recording and is displayed in seconds You can record for the full length of time available or set a shorter time period Your chosen time period is shown on top while the available time is shown in brackets below this value The Equivalent Fmax which determines the maximum frequency displayed on your screen will affect the availabl...

Страница 92: ...veform measurements are displayed simultaneously by default NOTE When measuring is complete your screen will display a waveform block or spectrum if you selected this option It will also show a trend in the overall power of the last recording 7 To view the power in another recording use the arrows on the right to move the cursor 8 If you used a speed sensor the top chart can also display the trend...

Страница 93: ...lysis tools to create a high resolution spectrum of the recordings To do this select Analyze Partial Waveform Analysis or Freq Based Waveform Analysis MORE See the Ascent Reference Guide You can combine up to 100 sample recordings in a single long time waveform chart in Ascent For example if individual recordings taken on your instrument used 4096 samples the maximum long time waveform length disp...

Страница 94: ...abnormal movements of the shaft in the bearing e g unbalance misalignment or rubbing against a drive casing The shaft movement will give you an indication of its cause For example if there is a lot of up down movement the machine feet might not be bolted down tightly enough Two probes are used when taking and analyzing enhanced orbit plot recordings These are nominally referred to as X and Y By co...

Страница 95: ...the orbit recording We suggest 1024 samples and a duration that covers 4 6 revolutions of the machine being tested For example an 890 RPM system 14 8 Hz has 1 revolution every 67 milliseconds 6 x 67ms 402 ms If you choose 400 ms for the duration you will just capture 6 revolutions of the machine NOTE Severe rub or looseness can produce random orbit plots Once the recordings have been received in A...

Страница 96: ...ertical and include the direction of the shaft rotation for display and analysis Record tach pulses for any tach triggered waveform recording using one average Easily take orbit plot recordings on a route you have set up in Ascent NOTE When using your instrument to collect data on route if the route includes corresponding recordings for two different axes on the same bearing these will be collecte...

Страница 97: ...t of the shaft If required you can also take the measurements with accelerometers if no displacement probes are available These measure the movement of the bearing housing not the shaft 7 Press Number of Samples Select an appropriate number of samples TIP We recommend 1024 samples 8 Press Wfm Duration Total Time Select a measurement duration TIP We recommend 4 6 revolutions You could select Revs f...

Страница 98: ...Ascent for advanced analysis 12 Press Save to save the two waveform measurements used to generate the orbit plot NOTE You must specify the vertical and horizontal channels in order to correctly view the orbit plot in Ascent NOTE The circle icon indicates the start position of the waveform The triangle indicates the end 13 Press Change View to toggle between orbit plot and waveform views Orbit plot...

Страница 99: ...d imported from Ascent 3 Press to toggle to the Axis Point Mode to Multi Axis X Y for Orbit 4 Press the buttons on the left of the Multi Channel On Route screen to specify you X and Y axes 5 Press the buttons on the right of the Multi Channel On Route screen to specify all the other the axes you wish to record Press 6 Select the axis point you wish to take a recording for Press to begin sampling 7...

Страница 100: ... measure the frequency you are interested in 3 Performing trial impacts with your hammer on the machine you are investigating This trial phase provides an opportunity to experiment with different hammer tips and force of impact to ensure you are prepared to take high quality recordings 4 Performing actual impacts in Run mode and recording the specific locations and directions used 5 Reviewing the ...

Страница 101: ... g spectral parameter settings such as Fmax Fmin lines and number of averages Selecting the appropriate settings will enable you to measure the frequency of interest on the machine you are examining EG You might want to measure two channels with 3 kHz Fmax To set up the channels and sensors on your instrument 1 Press or Measure 2 Use the navigation arrows to select Modal Impact Testing Press 3 Sel...

Страница 102: ...ax Fmin b Use the navigation arrows to select the required option Press 6 Specify the total time required to take a waveform recording 7 Press Wfm Duration Total Time 8 Select the required option 9 Press 10 Select the force signal trigger level a Press Hammer Trigger b Press Change Channels to enable the appropriate channels c Press a button on the left beside the channel s you wish to enable d Pr...

Страница 103: ...s Hammer Point Hammer point name is incremented each time you save No Increase Hammer point is not incremented Sensor Point Measure by impacting the same location and moving the sensor sensor point name is incremented d Press Point Name Increment to change the default interval at which points will automatically increment e Press Sensor Setup to set up your channels and sensors as required 12 Press...

Страница 104: ... messages NOTE Trial data is not retained To run a trial impact 1 Press or Measure 2 Press to scroll and select Modal Impact Testing Press 3 Select the required modal impact test Press 4 Connect your impact hammer to the CH1 port on your instrument 5 Connect your sensor 6 Press to confirm your hammer and sensor are connected correctly 7 Wait for the instrument to settle 8 Use your hammer to impact...

Страница 105: ... taken NOTE You can press to toggle between displaying impact and response waveforms and impact and response spectra All these graphs display in real time while you are acquiring data TIP Press to access more detail about the warning message while it displays TIP You do NOT need to press a button to retain an impact You can simply execute a new impact to achieve this TIP You might need to change t...

Страница 106: ... Test Once you have performed one or more trial impacts and are satisfied that you are set up to obtain good quality data you can enter Run mode and perform an actual impact test This involves executing a number of impacts for each point according to your labeled machine test plan and then saving each group of recordings against the relevant point As you perform impacts your instrument keeps track...

Страница 107: ... Motor2 etc However simply using numbers is quicker and easier than using an alphanumeric name for each point Press if you are satisfied with the impact you have executed and wish to perform another impact TIP Alternatively you can simply perform another trial impact The instrument is ready and waiting for you Press to discard the impact you have just taken NOTE You can only discard the most recen...

Страница 108: ... which you performed the impact e g Right Side Press c Select the point names for the channels you used d Press Hammer Axis to select the direction of the impacts NOTE Each response channel must be saved to a unique point or axis e Press the button s beside the Channel Axis labels Select the direction s you used Press 2 Press to exit when you have finished specifying the details for the impacts yo...

Страница 109: ... Uses 98 5 Review Data Once you have taken modal impact recordings you can review the data On your instrument press or Record Review MORE Click here to learn more about reviewing stored recordings In Ascent In ODS software such as ME scope ...

Страница 110: ...try Press 3 Use the arrow keys on the left to select a keypad entry or press to create a new one 4 If you are creating a new keypad entry use the arrow keys to highlight it Press Unit to select the type of unit you wish to measure 5 Press Display Enter the text that will display on your screen when you collect the data e g Enter Machine RPM 6 Press instead of taking a measurement Use the keypad to...

Страница 111: ...Section 4 Measurement Types and their Uses 100 Using the keypad to enter measurements ...

Страница 112: ...tion will have relatively little impact on the first order running speed peak However at 50 orders the impact will be significant The peak will be smeared from its original location to the original location of the 51st order 2 x 50 orders 100 of an order The order tracking system prevents smearing of spectral peaks To do this it automatically adjusts the data sampling rate to obtain a constant num...

Страница 113: ... the X axis on an order tracked spectra is in Orders not CPM NOTE Order tracked recordings can also be configured in Ascent See the Software Reference Guide for more information NOTE Phase data is not available for order tracked recordings To take an order tracked measurement 1 Press or Measure 2 Use ONE of these methods to select the required measurement type Press Spectrum Waveform Press Demodul...

Страница 114: ... and 3200 lines for dual channel recordings 6 Press to save your changes and return to the main measurement screen 7 Use EITHER of these measurements depending on the type of measurement Press Fmax Fmin for measurements based on orders Press Wfm Duration Total Time for measurements based on revs 8 Press Ord Trk or Revs Trk or use the left and right arrow keys to select the text Tracked from the se...

Страница 115: ... tracked measurement CANNOT be taken without a tachometer If OFF is selected an alert will display when you attempt to take the measurement It will advise you that a tachometer is required When a tachometer is specified and order tracking is activated RPM is measured throughout the recording and then averaged to get a final weighted RPM 12 Attach the vibration sensor 13 Connect the tachometer that...

Страница 116: ...Section 4 Measurement Types and their Uses 105 Example of tracked measurement ...

Страница 117: ...re 2 Use the arrow keys on the left to select Average Value Press 3 Use the arrow keys on the left to select an existing parameter set or press to create a new set 4 Set the recording parameters as required NOTE Ensure the sensor setup corresponds with the measurement type you wish to take Create new sensors where necessary The instrument will record values in the sensor s native units only 5 Pres...

Страница 118: ...NOT yet been defined in the instrument you will need to create a sensor definition before you can assign it to a channel See Defining and Editing Sensors 5 Use the arrow keys to select a sensor Press to assign it to your channel 6 To enable the channel for measuring press a key on the left beside your chosen channel Enabled will display beside the channel to indicate you can now use it to take mea...

Страница 119: ...nt was taken To save multi channel measurements 1 Press when you are ready to stop measuring 2 Press Save This opens the Select Location to Save menu 3 Press Save to on the right beside the channel you wish to save 4 Use the arrow keys to select an existing location to save the measurement to or press to create a new location NOTE You can save each channel s measurements or select only those you w...

Страница 120: ...Section 4 Measurement Types and their Uses 109 Saving multi channel measurements ...

Страница 121: ...sensors to channels Set Measurement Units and Spectrum Scaling You can choose the standard US or SI units or choose your own preferences The tables below outline the available options To select your preferred measurement options 1 Open the main menu 2 Press Options Press Measuring Units 3 Press repeatedly to toggle the unit set displayed 4 Select Custom to set your own preferences Press the keys b...

Страница 122: ...above As above Current Amps As above As above Unit Set SI US Custom Frequency Hz CPM Hz CPM vdB Units vdB SI 1e 6 mm s vdB US 1e 5 mm s vdB US vdB SI adB Units adB SI 1 µm s2 adB US 1 µg adB US adB SI Linear Speed Distance mm in mm in Weight g kg lb oz lb oz tons kg g Balancing Units Quantity Acceleration Velocity Displacement Units g in s mm s mm µm mil Scaling RMS 0 pk pk pk ...

Страница 123: ...Press Spectrum Waveform 3 Press to display the hint labels 4 Press Create New Paramset The default parameters for a spectrum measurement display 5 Press a key beside a parameter value to change it This will cause the parameter to cycle through the available options Alternatively a submenu will display enabling you to enter a value using the keypad or select a value from the list Press to save your...

Страница 124: ...Section 5 Set Measurement Options 113 Spectral lines submenu ...

Страница 125: ...y of the default parameter set 4 Press to redisplay the hint labels 5 Press Edit Name Enter a description for your parameter set Press 6 Press the keys beside the relevant options to set the measurement parameters EG You could create a custom parameter set for a spectrum waveform and change the store units to acceleration set the Fmax to 1500 CPM the ORD to 10 x the machine running speed the numbe...

Страница 126: ... To assign a sensor to a channel 1 Open the main menu 2 Press Options 3 Press Sensor Setup Press Change Sensor beside your chosen measuring channel NOTE If this is a new sensor that has NOT yet been defined in the instrument you will need to create a sensor definition before you can assign it to a channel See Defining and Editing Sensors 4 Use the arrow keys to select a sensor Press to assign it t...

Страница 127: ...surement Options 116 Assigning a sensor to a measurement channel Spectrum Parameters This section provides more information on the available spectrum parameters Fmax Spectral lines Fmin Tach trigger Averaging Windowing ...

Страница 128: ...quency ranges can be recorded in Acceleration and single channel only Instruments that support these Fmax ranges will provide consistent trendable readings even though their normal noise distortion and anti aliasing specification 70 dB is not met in the 60 kHz and 80 kHz high frequency ranges NOTE If you want to add support for up to 80 kHz Fmax on an instrument manufactured before 1 March 2013 yo...

Страница 129: ...liminate the ski slope effect from the low frequency end of the spectra All spectral lines below the Fmin value will be set to zero and will NOT be included in the overall RMS calculation Tach Trigger When you select Tach Trigger measuring will only start when a tachometer pulse is detected If Tach Trigger is set to OFF the instrument will start measuring as soon as the settling time has elapsed A...

Страница 130: ... averages taken Exponential averaging This is occasionally used during manual measurements to give the advantage of a fast update rate while maintaining some averaging The most recent spectra have more influence on the average than earlier measurements Averaging is continuous until you stop the measurement Peak hold This is useful for measuring the maximum amplitude peak that occurs over a period ...

Страница 131: ...waveforms Choose Window Type You can choose a Hanning or Rectangular no window window type Each type of window has characteristics that make it better suited for some applications and less well suited for others The following table is a general guide only You should match the window type to the nature of the signal you are trying to capture e g random or transient signals Window Type Purpose Hanni...

Страница 132: ... instrument set the number of samples and duration for you To access this feature simply set the Equivalent Fmax so that it covers your required frequency range Your instrument will select the maximum number of samples and duration that can be used with this Fmax You can then adjust these values as required Duration The duration of a waveform is its recording time The duration value depends on the...

Страница 133: ...selected The name of the currently selected folder will display on the main menu beside the Folders feature NOTE To select a different folder press Folders USB Export Use the arrow keys to select the required folder Press This loads the folder and all its machines into current memory and returns you to the main menu 4 Press Record Review to display the machines in the selected folder 5 Press Save ...

Страница 134: ...ake Individual and Multiple Recordings You can record all parameter sets at a location or select parameter sets individually This enables you to selectively record data You can also speed up data collection by reducing the number of key presses needed to take multiple recordings at a single location Individual recording To record an individual parameter set select the set Press to start recording ...

Страница 135: ...r instrument displays the recorded information on the screen for several seconds before returning you to the Record Review menu BL Your instrument displays a data quality message if the difference between the last measurement taken and the preconfigured baseline value is outside the typical or expected range of variance This applies if a baseline has been configured and if the measurement differs ...

Страница 136: ... screen Press to stop measuring Press to save the recording Press to record the next parameter set without saving your current recording This will either Return you to the Record Review menu Start taking the next recording If you have selected a location with multiple parameter sets beneath it Review Recording You can review a recording as soon as you have taken it or once you have stored it Revie...

Страница 137: ...e column 6 Display older recordings a Press to select the Review column A black border displays around the column to indicate you can now move up down through the recordings b Use the arrow keys on the left to select a recording Press to display your selection NOTE An asterisk beside a recording indicates that more than one recording type is contained within the record spectrum and waveform or 6Pa...

Страница 138: ...w select items The black border indicates all recordings can be reviewed Delete Recording To delete a recording 1 Press or Record Review on the main menu 2 Use the arrow keys on the left to scroll up and down Select the recording you wish to review 3 Press to delete the recording 4 Press to confirm the deletion Attach Note You can add a text note or comment to a recording To do this 1 Highlight th...

Страница 139: ...t This will enable you to make detailed comparisons however it will take a long time to send the data to your instrument The next time you take a recording the overall power level for the baseline will display in the top right corner of the screen directly underneath the overall power level for the current recording The LED lights on the instrument will also indicate the status of the recording re...

Страница 140: ...rements Onsite This section explains how to take measurements and perform onsite analysis You will learn how to Take a measurement Change the way a measurement displays Use cursors and zooming to analyze your measurements Set the RPM for a measurement Store a measurement ...

Страница 141: ...y machines that are operating near the machine you are measuring if possible Machines operating nearby can affect the vibration of the machine you are measuring In addition to taking measurements Stop and listen to the sound of the machine Look for loose bolts and oil leaks Check whether any machine parts that are vibrating visibly Touch the machine to check for hot bearings Touch the area that is...

Страница 142: ...rmal load and running speed 5 Open the main menu on your instrument 6 Press or Measure 7 Use the arrow keys to select the required measurement type Press 8 Change the default settings for the measurement option if required MORE See Change Default Measurement Settings below 9 Press to start the measurement NOTE The instrument and sensor will take a short time to settle before measuring begins NOTE ...

Страница 143: ...Section 7 Analyzing Measurements Onsite 132 13 Press to stop viewing the measurement and exit without saving Taking measurements ...

Страница 144: ... from the list 3 Press to apply your changes and return to the previous menu 4 Press Press to access the Sensor Setup option and select a different sensor 5 Press the required button on the right to select the required measuring channel 6 Use the arrow keys on the left to highlight the required sensor Press to proceed with your selection 7 Press the required button on the right to enable your pref...

Страница 145: ...separate chart on your screen for each measurement channel Doing this enables you to Watch several live measurements simultaneously Freeze and compare all measurements on your screen Toggle between charts to view each one individually Viewing two waveforms simultaneously ...

Страница 146: ...ments You can press to stop and analyze a measurement When you this the overall vibration value will display at the top of the screen TIP You can press to display hint labels for analysis options such as zooming and cursors Pressing to display analysis options ...

Страница 147: ... be placed directly behind the first cursor The values for the new cursor will display at the top of the screen Press or repeatedly to move the cursor to either side so that it becomes visible Toggle the active cursor Press Second Cursor to toggle between the two cursors The selected cursor will be darker with a dashed line The inactive cursor will be a lighter gray with a finely dotted line Clear...

Страница 148: ...ess Second Cursor to add a new cursor to the display Press or repeatedly to move it to the second peak The values for both cursors will display in the top of the screen The delta symbol will display on the far right The value beside the delta displays the frequency or time difference between the two peaks The delta indicates the frequency amplitude difference of two peaks ...

Страница 149: ...harmonic harmonic sideband cursors and normal cursors The selected cursor type is identified by a brief message on your screen 3 Press or repeatedly to move the cursor over different peaks Additional cursors will display as whole number multiples of the frequency or time value indicated by the main cursor 4 Press Press Clear Cursors to remove all harmonics and sidebands ...

Страница 150: ...the arrow keys on the right to expand the peaks of a spectrum or waveform To do this 1 Move the cursor to the position of interest 2 Press X Axis Zoom repeatedly to zoom in to the cursor position NOTE You will zoom in by a factor of two per key press The more spectral lines or waveform sample points used the more times you can zoom Zoom vertically and horizontally To see low amplitude peaks more c...

Страница 151: ...g this will only be applied to the selected chart Select Chart To select a chart 1 Display your charts 2 Press to display the hint labels 3 Press Select Chart The axes of the chart become thicker and darker to indicate the chart is selected 4 Press repeatedly to toggle to the chart you wish to work with Display Single Chart To display one chart 1 Select a chart to make it fill the screen 2 Press P...

Страница 152: ...ly displayed Press repeatedly to toggle between waveform or spectrum displays for up to four channels and spectrum waveform to view both measurement types on your screen simultaneously for individual channels Change Multi chart Layout Display To change a multi chart layout display 1 Display your charts 2 Press to display the hint labels 3 Press Press Chart Data Change to open the Multi Chart Layou...

Страница 153: ...your screen 2 Highlight your spectrum measurement 3 Press Press Y Axis Log to set the Y axis amplitude scaling options 4 Press Linear Log dB repeatedly to toggle between Linear Log and dB scaling NOTE VdB and adB scaling are only available when you measure velocity and acceleration respectively 5 Press Y Axis Max This is the highest amplitude value that will be displayed on your screen 6 Use the a...

Страница 154: ...above this value while you are measuring you will NOT see the top of the peak When using Linear scaling you have two extra display options Automatic Enables the instrument to auto scale the left axis to accommodate the highest and lowest peaks Current Fixes the Y axis to whatever amplitude is currently displaying regardless of how large or small the peaks become ...

Страница 155: ... Log scaling are available for all measurement types The tables list the amplitude display units you can choose from Store Units Max dB Value Linear Scale Max dB Value Log Scale Acceleration m s2 mm s2 m s2 mm s2 Velocity mm s µm s mm s µm s Displacement mil mm µm mm µm Current mA µA mA µA Store Units Y Axis Fixed Linear Scale Y Axis Fixed Log Scale Acceleration automatic current mm s2 m s2 mm s2 ...

Страница 156: ... industries adB The vibration acceleration level adB US is 20 times the logarithm of the ratio of the RMS acceleration level to 1 µg RMS The SI version of adB is less commonly used and has a reference value of 1 µm s2 Set RPM Setting the 1X RPM enables you to view the chart in orders for spectra or revs for waveforms You can enter the RPM manually if you know it or set the RPM from a spectral 1X p...

Страница 157: ...edly to move the cursor to the 1X peak 2 Press Press Extended Commands 3 Select Set RPM The frequency of your selected peak will display 4 Press to save this frequency as the RPM value NOTE If a tachometer is connected to your instrument it will use the RPM from the tachometer rather than an entered value Setting the RPM ...

Страница 158: ...z or CPM This enables you to see how closely spectral peaks correspond to the running speed of the machine You can also move a cursor to a peak of interest The exact number of orders at that frequency will display at the top of your screen To view an order 1 Display a spectral chart 2 Set the RPM 3 Press Press X Axis Orders 4 Repeat the previous step to deactivate orders ...

Страница 159: ...g speed instead of your regular measurement units To view the revolutions 1 Display the waveform chart 2 Set the RPM The bottom axis will display the revs Waveform chart displaying revs on the X axis Save Measurement To save a measurement press to stop the measurement Press Save You now need to select or create a machine point and location to save the measurement to ...

Страница 160: ...achine 1 Press a key beside Save to NOTE You can use keys to depending on the number of channels you used for the measurement 2 Press or to scroll up and down 3 Press Expand Navigator repeatedly to expand a machine so its points and locations become visible 4 Press to save the recording to your chosen location ...

Страница 161: ... use keys to depending on the number of channels you used for the measurement 2 Press Create New Machine 3 Enter a name for the machine Press 4 Repeat this process to create a point 5 Press and use the arrow keys to select a location 6 Press until you see the message Data Saved Functions that display when you press after creating a new machine ...

Страница 162: ... exiting Measure or Route mode This is useful when you are working in an environment that has varying light conditions To access this option 1 Press and hold 2 Press or to toggle between a high or low screen contrast MORE You can access additional settings by pressing Options LCD Contrast Backlight Sound Adjusting screen contrast while in Measure mode ...

Страница 163: ...cent you will need to add it in Ascent See the Ascent Reference Guide for details To transfer recordings from your instrument to Ascent 1 Connect your supplied USB data transfer cable to your computer and the USB to PC port on your instrument 2 Switch your instrument on 3 Open Ascent 4 Click the Receive button to establish communication between Ascent and your instrument 5 Ensure the Comms Method ...

Страница 164: ...Section 8 Send and Receive Information 153 Transferring recordings to Ascent ...

Страница 165: ... instrument 5 Ensure the Comms Method field meets your requirements NOTE Typically this field is set to Instrument however you can select a different option if required 6 Select your instrument from the dropdown list provided 7 Tick the checkboxes beside the folders you wish to transfer NOTE Tick Include Baseline Spectra or Include Alarm Bands if you wish to send this data to your instrument Doing...

Страница 166: ...o be added or deleted on the instrument Additionally all stored recordings in the instrument are also deleted This is designed to free instrument memory and save you the task of manually deleting recordings machine definitions and more Retain Stored Recordings If you do NOT wish to overwrite an existing recording simply rename the folder on your instrument or in Ascent before you resend it Your in...

Страница 167: ... the PC switched on MORE See the Ascent Reference Guide To synchronize the time zone on your instrument and computer 1 Open the main menu 2 Press twice 3 Press Ascent Time Sync to toggle the setting The following options are available Auto Synchronize the date and time whenever data is transferred Off Do NOT synchronize the date and time The instrument will continue to use the date and time settin...

Страница 168: ...ther physical location This file could be emailed or sent on CD ROM and imported using your instrument s USB host port you do NOT need to use Ascent The route would then be collected as normal and the measurements exported once using the USB host port as XML When returned to the original sender the instrument XML file could be imported into Ascent for normal measurement route analysis If you expor...

Страница 169: ...Flash Drive 3 Press Select Window to toggle between the available options Instrument Folders screen Export to Ascent folder on USB flash drive USB flash drive s Import from Ascent folder 4 Select Instrument Folders 5 Use the and arrow keys on the left to select a folder you wish to export 6 Press Export Folder to export the selected folder Press to confirm the transfer The data will be exported in...

Страница 170: ...mport from Ascent 5 Use the and arrow keys to select an XML file to import The instrument will list the XML files contained in the Ascent to SCOUT vbX folder on the USB flash drive and the root of the USB flash drive 6 Press Import Folder to import the selected file 7 Return to the main menu The instrument automatically opens the imported folder This is listed beside the Folders menu option Remote...

Страница 171: ...s Remote Comms Wait while your instrument connects to the server 2 Press Receive Folder or Sync with Server NOTE The option displayed depends on whether Sync is enabled under the settings for Remote Comms on your instrument 3 Select the folder containing the data you wish to receive Press Receiving data from your Remote Comms server onto your instrument ...

Страница 172: ...Press Sync with Server or Send Folder NOTE The option displayed depends on the settings you specified for Remote Comms on your instrument 3 Select the folder you wish to send the data to Press 4 Take EITHER of these actions Press Delete if you wish to delete the folder you have just uploaded Press Continue if you wish to retain the folder you have uploaded to the server Sending data from an instru...

Страница 173: ...SB Wi Fi dongle available from your local Commtest distributor You will NOT be able to connect your instrument wirelessly where setting up a connection requires a browser based interaction For example in a hotel room or coffee shop where you are required to enter your name or a code to activate the Wi Fi connection However you will be able to connect your instrument wirelessly to A wireless router...

Страница 174: ...the USB port of your instrument NOTE Wi Fi networking requires the use of a specific USB dongle These are available for purchase separately from your local Commtest distributor 2 Press Options Wi Fi is listed as not connected beside the Comms button 3 Press Comms 4 Press Wi Fi 5 Press to select your region a Press Continue to acknowledge the legal warning b Select your region Press 6 Select the re...

Страница 175: ...Section 8 Send and Receive Information 164 Selecting your Wi Fi region Creating a Wi Fi connection ...

Страница 176: ...utomatically connect to your preferred network To preserve battery power we recommend you remove your Wi Fi adapter from the USB port when you have finished communicating This also applies when the instrument is switched off NOTE The IP65 environmental sealing certification for the instrument is only met when the rubber cover for the connectors is in place This is particularly important if you are...

Страница 177: ...ss connection you can specify you preferred default connection To do this 1 Insert your Wi Fi dongle in the USB port of your instrument 2 Press Options 3 Press Comms 4 Press Wi Fi 5 Press Preferred Wi Fi Networks 6 Select your preferred network Press A icon displays beside your selection Specifying your preferred Wi Fi network ...

Страница 178: ...dows phone MORE See the Apple User Documentation for information on personal hotspots Once you have set up a Wi Fi hotspot or internet sharing on your smart phone you can use its cellular data connection to access the internet This is especially useful if you need to connect your instrument to a Remote Comms server that is available via the internet You will be able to upload and download data usi...

Страница 179: ...ou wish to send when exporting UFF files from your instrument When you are doing Modal Impact Testing you can export all data or only FRF and Coherence data When you are doing a Cross Channel Spectrum you can export all data or only Cross Channel Spectrum data Choosing to include only FRF and Coherence data in the UFF file Only FRF and Coherence data is imported into ME scope ...

Страница 180: ...e makes it easier to take recordings and minimizes the potential for mistakes When the instrument is operating in route mode it will guide you through each measurement location Creating a route involves 1 Creating the machines and measurement setups 2 Creating routes by selecting these items and placing them in the required order NOTE A route can only be made up of machines that are stored in the ...

Страница 181: ... if a machine is temporarily unavailable If this happens you can continue taking measurements and return to the machine at a later time If a location contains several route entries that do NOT require a change of sensor the recordings can be taken automatically one after the other To access this feature you select the required location If an individual route entry is highlighted the instrument wil...

Страница 182: ... route entries will be recorded TIP Use the arrow keys to see the route entries attached to each location 4 Press Change Font Size to increase or decrease the font size of the displayed Route contents 5 Change the time format displayed on the Route screen to 12 or 24 hour format as required MORE See Adjust Date or Time Format for more information 6 Attach your sensor to the location indicated on y...

Страница 183: ...r speed the Linear Speed box will display Enter the machine speed manually before continuing or aim the laser tachometer at the reflective tape on the shaft to acquire the speed automatically NOTE Speed multiplier configured in Ascent will be applied automatically to all measurements However the following exceptions apply for RPM based machines The multiplier value will be ignored if the measureme...

Страница 184: ...alert notification type you configure will be used globally for all routes stored on your instrument Consequently the choice of route is NOT important 3 Press to select the highlighted route 4 Press then Alarms The Alarms screen will open 5 Press Baseline Overall repeatedly to cycle through the baseline alert options Warn LEDs will display a message and illuminate the appropriate instrument LEDs i...

Страница 185: ...have configured in Ascent is exceeded by the measurement LEDs only will only illuminate the instrument LEDs If the measurement exceeds the specific alarm levels a message will NOT display Disabled will NOT indicate that a band alarm level has been exceeded if this occurs NOTE If triggered the onscreen alert will specify the alarm state and band range that has been exceeded The highest alarm state ...

Страница 186: ...d to scroll down the list of available options Select Alarm Bands 7 Press The Alarm Band or Bands associated with the measurement will display The alarm name will be listed followed by the Measurement type the alarm applies to Spectrum Waveform Demod Spectrum etc Frequency range covered by the alarm in Orders or Hz CPM Alarm type Peak or Power EG Bearing Frequencies Spectrum 500Hz 900Hz Power indi...

Страница 187: ...locations if a multi channel recording is required When you start the recording all measurements will be taken simultaneously To record multiple channels on a route 1 Specify which channel will be used to record each point or axis EG Use channel 1 to collect all recordings taken on the horizontal axis Use channel 2 for the vertical axis 2 Select the route you wish to record 3 Press on the Route sc...

Страница 188: ...al and Vertical To select Axis mode 1 Specify a channel and axis combination 2 Press Axis on CH1 or for CH2 Use the arrow keys to select an axis NOTE Once selected you must only use this channel when taking recordings on your chosen axis for the duration of this route 3 Press to confirm your selection Selecting Axis mode ...

Страница 189: ...o allow for some flexibility while limiting the chance of confusion To select Point mode 1 Press Axis Point Mode to switch between Point and Axis 2 Press Point on CH1 or for CH2 Use the arrow keys to select a point 3 Press to confirm your selection NOTE As an alternative to these steps you can assign all Inboard bearings to channel 1 press to create a new match string and enter Inb The preview lis...

Страница 190: ...lay your route 4 Start recording as normal NOTE A summary of the multichannel configuration displays on the Route screen For example Points Dual Chan 1 2 indicates dual channel acquisition in Points mode Triaxial Measurements If you have a four channel instrument you can save time by using a triax sensor to take three measurements at once Configuring a triaxial on route recording on your instrumen...

Страница 191: ...on repeatedly to cycle through the two available options 10 Press Axis on CH2 The Axis selection list will display NOTE Triaxial recordings use channels 2 3 and 4 on the instrument via the 7 pin LEMO connector BNC Channel 1 is NOT available or used for this measurement type 11 Select Triax Sensor from the selection list Press 12 Ensure channel 2 is assigned to the X axis 13 Ensure channel 3 is ass...

Страница 192: ...Section 9 Working with Routes 181 Configuring a triaxial on route recording on your instrument Reviewing a recording taken with a triax sensor ...

Страница 193: ...ne has been configured to ask users for a speed reading a machine speed window will open before location measurements are taken You may also manually enter the machine speed at any time To do this select a location Press RPM or Linear Speed NOTE The Linear Speed window displays the roller diameter and point multiplier Point level specified in Ascent Speed multipliers configured in Ascent are appli...

Страница 194: ...Section 9 Working with Routes 183 Linear Speed ...

Страница 195: ...t be edited Skip Route Entries and Machines You can change the order in which you collect recordings To do this you jump to a different position in the route This enables you to skip individual route entries locations or entire machines It is useful if a machine on your route is temporarily unavailable but will be available for recording later in the day If you jump to a different position in a ro...

Страница 196: ...rd any route entries you have skipped at any time during your route To do this 1 Display your route 2 Press then to display the hint labels 3 Press Prev Free Recording or Next Free Recording to jump to the next or previous unrecorded parameter set 4 Press to continue recording as normal ...

Страница 197: ... what percentage of the entire route is complete press to return to the Route menu The percentage completed expressed as the number of route entries that have been recorded displays beside the route name To return to the route and resume recording ensure your route is highlighted and press twice The instrument will automatically continue where you stopped recording Track progress through route ...

Страница 198: ...ny time during route collection MORE See Select Recording to Review Free Run Manual Save The instrument takes a measurement that updates continuously This enables you to watch the signal as it displays on your screen You can save the measurement or stop measuring without saving This method is ideal if you want to briefly check each machine s condition and only save individual recordings when a mac...

Страница 199: ...for recording To select the appropriate save mode for your recording 1 Highlight your route in the Route menu 2 Press to display your route 3 Press Recording Save Mode repeatedly to toggle between the options Save options shown at bottom right of screen ...

Страница 200: ...s 5 Select a route recording if more than one recording is listed Press TIP Check the date time stamp to find the required recording NOTE If you collect the same measurement as an off route recording both this and the route recording will display in the list 6 Press to display the hint labels and use cursors harmonics and zooming to analyze your data MORE See Analyze Measurement for details on how...

Страница 201: ...s to select your route Press 4 Select the machine containing your route recordings 5 Press repeatedly to expand the machine so the locations and parameter sets display 6 Use EITHER of these methods depending on your requirements Select a location to retake all recordings at that location Select a parameter set to retake an individual recording 7 Press You will be prompted to keep or replace record...

Страница 202: ...e arrow keys to select the machine that contains the recording 5 Press repeatedly to expand the machine so the parameter sets display 6 Highlight the parameter set you recorded earlier Press Review Recordings 7 Select your route recording if there is more than one recording in the list TIP Use the date timestamp to identify your route recording 8 Press to delete the recording 9 Press to return to ...

Страница 203: ...be sent along with the collected route 4 Press Route on the main menu to return to the route 5 Use the arrow keys to select your route 6 Press A message will display ask if you wish to continue 7 Press to continue from where you stopped measuring Edit or Delete Route You can use Ascent to create edit and delete routes You CANNOT edit or delete routes directly on your instrument To remove a route 1...

Страница 204: ...h and remove notes Storage Capacity and Recording Volume Your instrument s storage capacity is determined by the amount of available memory space There is no limit to the number of routes folders and machines you can store on your instrument However the memory space on your instrument will decrease as you store recordings The number of recordings you can store depends on the type and setup of thos...

Страница 205: ...you can store recordings on your instrument transfer these to your computer and analyze these in your own time TIP Analysis is best carried out away from machines in a safe quiet environment The image outlines the hierarchical data storage structure which your instrument uses Data storage structure on your instrument ...

Страница 206: ...a sensor is facing when you place it on a machine EG Horizontal vertical tangential Because you can vary the direction location of the sensor with each new recording each machine point can have several locations Parameter set This defines a list of measurement parameter values used to take a recording Because parameter sets are stored in the instrument they can be retrieved and reused This saves t...

Страница 207: ...your new folder and return to the main menu Change Selected Folder When you create a new machine it is placed in the folder you have currently selected To change the selected folder 1 Press Folders USB Export on the main menu 2 Use the arrow keys to select the required folder 3 Press Rename Folder To rename a folder 1 Press Folders USB Export on the main menu 2 Use the arrow keys to select the req...

Страница 208: ... deletion To restore a folder that has been deleted and over written 1 Press Folders USB Export on the main menu 2 Press The Restore folder from the Recycle Bin screen will display 3 Use the arrows keys on the left to select a folder to restore TIP The date beside the folder indicates when it was deleted 4 Press to restore the selected folder NOTE If you have created a new folder with the same nam...

Страница 209: ...nt folders so they can be segregated by type geographic location frequency of data collection and more The quickest easiest way to create your machines is in Ascent You can create your folders machines and schedule entries then send these to your instrument MORE See the Ascent Reference Guide When you create machines and measurement parameter sets on your instrument these are automatically added t...

Страница 210: ... 3 Use the arrow keys on the left to select a folder Press 4 Press or Record Review on the main menu 5 Press to display the machine creation icons 6 Press Add New Machine to create a new machine 7 Enter a name for the machine Press 8 Press the keys beside the relevant icons on the screen to create points locations and parameter sets Key Icon Description Machine Point Location Parameter set Schedul...

Страница 211: ...le 3 Press repeatedly to expand the machine until the required axis location is selected 4 Press to display the machine creation icons Press Add New Schedule 5 Select a measurement type The screen will display the default parameters for your measurement 6 Press to assign the default parameter set to this location if required 7 Press to create a new parameter set It will display at the top of the l...

Страница 212: ... the left beside your chosen channel to enable it if required 6 Press twice to return to the Record Review menu Add Structure to Existing Machine You can add structures to an existing machine structure To do this 1 Press or Record Review on the main menu 2 Press on the main menu to display your machines 3 Use the arrow keys on the left to select a machine 4 Press repeatedly to expand the machine s...

Страница 213: ...cture is copied when a new machine is created in this way The recordings are NOT copied 1 Press Review Record on the main menu 2 Press to display your machines 3 Use the arrow keys on the left to select a machine 4 Press repeatedly to make the points and other lower level items visible 5 Highlight the item you wish to copy 6 Press Press Copy 7 Use the arrows on your screen to select the location f...

Страница 214: ...cal for example simply create a new vertical location on a point and copy any required parameter sets from the horizontal location then delete the horizontal location 1 Press or Record Review on the main menu 2 Press repeatedly to display the machines 3 Use the arrow keys on the left to select a machine 4 Press repeatedly to display the points and other lower level items 5 Select the item you wish...

Страница 215: ...d They will remain stored in your instrument so you can apply them to future recordings To delete a machine structure 1 Press or Record Review on the main menu 2 Press repeatedly to display your machines if required 3 Use the arrow keys to select the required machine 4 Press repeatedly to display the points and other lower level items 5 Select the item you wish to delete Press Delete 6 Press when ...

Страница 216: ...e sensor type if the instrument contains any recordings that have been taken with that sensor Your instrument will associate these recordings with their sensor If you need to redefine the sensor type first delete all the associated recordings on your instrument When you set the parameters for a measurement you cannot choose settings that conflict with the type of measurement you are trying to crea...

Страница 217: ...ement and current Toggle the Voltage Ring and Coupling settings Toggle Auto Settling ON OFF When Auto Settling is ON your instrument will ignore the user specified settling time see above and automatically select the most efficient settling time for your sensor type Edit the Sensitivity The range of sensitivities will vary depending on the selected sensor s Store Unit To enter a decimal point pres...

Страница 218: ...ves this by comparing the actual sensor bias voltage with the expected voltage range as configured on your instrument Most accelerometers have an output voltage centered on 12 V DC Consequently your instrument has a default bias voltage range of 8 16V Some sensors use a lower or higher bias voltage If you are using a sensor like that review the manufacturer s documentation and create a new Bias Vo...

Страница 219: ...tage screen NOTE Pressing toggles the Bias check on off 7 Press Create New Bias Voltage 8 Press 9 Enter a name Press TIP You can use the name of the sensor 10 Press Min Bias Enter the minimum bias Voltage level Press 11 Press Max Bias Enter the maximum bias voltage level Press 12 Press twice to select the new bias check configuration The sensor will now use the new or edited bias values Set Defaul...

Страница 220: ...ress Sensor Setup Press Change Sensor beside your chosen measuring channel 3 Press Select as Default to select the sensor you wish to use for the schedule entries sent from Ascent Delete Sensor If required you can remove a sensor from your machine To do this 1 Press Options on the main menu 2 Press Sensor Setup Press Change Sensor beside your chosen measuring channel 3 Use the arrow keys on the le...

Страница 221: ...eview on the main menu 2 Press to display the Note menu 3 Press New Note 4 Press in the Note Entry menu Enter your text TIP Press to enter punctuation Press to enter a space Press to delete characters 5 Press to save the note Edit Note To edit a note 1 Press or Record Review on the main menu 2 Press to display the Note menu 3 Press Create New Note 4 Press Edit Note on the Note Entry menu Enter you...

Страница 222: ...l notes if required 6 Press to return to the previous menu The note icon will display beside your chosen item to indicate a note is attached View Note To view a note 1 Use the arrow keys to select the item with the attached note 2 Press Notes Detach Note Removing a note only detaches it from a selected item The note will remain in the Note Entry menu where you can select and attach it to other ite...

Страница 223: ...lete 5 Press Delete Note If the note is attached to any items you will be prompted to confirm your action 6 Press to confirm Delete all Recordings in Folder You can Delete an Individual Recording or delete all recordings in a folder To delete all the recordings within a folder 1 Press Folders USB Export on the main menu 2 Use the arrow keys to select the required folder 3 Press Delete Recording 4 ...

Страница 224: ... or if you are certain you no longer require any of the information stored on your instrument e g if you plan to resell the instrument Before emptying the database transfer any information you wish to save into Ascent WARNING Emptying the database on your instrument removes all information you have stored there You will lose all machines routes parameter sets and notes you have stored on your mach...

Страница 225: ... from precisely calculated positions on the rotor You can balance a rigid rotor in one or two planes You can correct any uneven mass distribution in the rotor by adding removing weights to from one or two selected cross sectional planes on the rotor For single plane balancing the mid plane of the rotor is usually used as the balancing plane The planes at the extreme ends of the rotor are usually u...

Страница 226: ...ing More than 150 RPM Dual plane balancing NOTE Before attempting to balance a rotor you must confirm that the cause of vibration is uneven mass distribution in the rotor Good balancing results can only be obtained if vibration is caused by uneven rotor mass distribution Attempting to balance a rotor with other problems will generally NOT reduce the vibration level Balancing Process You can balanc...

Страница 227: ... before weighing the electrode Ensure the shape of the correction weight does NOT cause it to become a dirt trap Dirt accumulated on the weight can cause rotor imbalance It is important to attach the correction weight s at the same radial distance as the trial weight EG If the trial weight was attached 2 mm inches from the center of the rotor the correction weight must also be attached 2 mm inches...

Страница 228: ...different trial weight masses and placements to see the effect on the imbalance without having to attach weights to the machine Calculate the effect of further trim balances Change the units used in a final balancing report by selecting different units then re entering the collected values To enter a value manually 1 Work through your balancing setup process as usual 2 Press to take a reading The ...

Страница 229: ...e beginning or end of the process or perform balancing without saving the report To set up a balancing job 1 Press Balance on the main menu 2 Press New Job This clears any existing setup data from previous balancing jobs 3 Press Setup Use the options in the Balance Setup menu to apply your preferred balancing settings Setting up a balancing job The rest of this section describes the Balance Setup ...

Страница 230: ...g operations on a rotor requires you to establish a positioning system for balance weights To do this first establish a reference mark somewhere on the rotor circumference You can then choose the weight positioning system most appropriate for your balance job Degrees Measure the angle in degrees from your reference mark 0 359 The radius of the rotor must stay constant Circumference arc Measure the...

Страница 231: ...lue Press NOTE If you select circumference arc or fixed positions the Circumference or Fixed Position submenus will open Here you need to specify the rotor circumference or the number of fixed positions NOTE You can set the circumference units used inches or mm in the Balance Setup screen To do this press Weight Lin Dist Press Linear Distance 9 Press Plane B Weight Position if you selected dual pl...

Страница 232: ...etup 3 Press Sensors 4 Select the number of sensors required Press 5 Press CH1 Sensor Select an existing sensor or press Create New Sensor as required 6 Press to return to the Balance Sensor Setup menu 7 Press to specify a second sensor for dual plane balancing if required NOTE Some instruments support simultaneous two channel dual plane monitoring 8 Use the CH Position option on the left of your ...

Страница 233: ...ed to enter both the CH Position and the Reference Mark location This will enable your instrument to calculate the trial weight angle Once you take the initial reading your instrument will display the suggested trial weight angle in the upper right of the screen Angles are measured in the direction you designate as your Weight Orientation i e with rotation or against rotation If you are performing...

Страница 234: ...alancing repeat the above step if you want your instrument to recommend trial weight placement angles for both planes Using channel position Averages Averaging the out of balance values can increase the accuracy of your measurements This enables your instrument to make more precise recommendations for the size and placement of balance weights A higher number of averages produces more accurate meas...

Страница 235: ...om the initial reading To enter the rotor s weight and diameter 1 Press Balance 2 Press Setup 3 Press Machine Information on the Balance Setup menu 4 Use the options on your screen to enter the values TIP If you need to enter a decimal point press Press 5 Return to the Balance Setup menu if you need to change a measurement unit e g for rotor weight or diameter 6 Press Weight Lin Dist 7 Change the ...

Страница 236: ...Reference Mark Location and CH Position This enables your instrument to calculate the trial weight angle To enter your reference mark details 1 Press Machine Information on the Balance Setup menu 2 Press Reference Mark Enter the angle from the tachometer reflective tape to your reference mark Press 3 Enter zero if these marks are aligned with each other NOTE Once you take the initial reading your ...

Страница 237: ...en short measurement times are important EG If you were to balance using the Narrow option on a machine running at 3000 RPM the filter and resolution would be set to 15 RPM 3000 RPM divided by 200 or 300 RPM if using the Wide setting 3000 RPM divided by 10 Weight Orientation Weight Orientation enables you to choose where to place balance weights on a rotor relative to the rotor s direction of rota...

Страница 238: ...re you can set balance and rotor weight units 3 Press to navigate back to the Balance Setup menu when you have set your units Store Units Store units enable you to specify your preferred measurement units and overall scaling for balancing jobs Combine and Split Trim Weights As you continue to fine tune a balance job you may end up with several trim weights fixed at various angles on the balancing ...

Страница 239: ...al trim weights the weight vector Existing Total and the target weight and angle the trim weight angle solution you hope to achieve 5 Use the arrow keys on the left to select one of the trim weights you want to remove 6 Press Remove or Keep The calculator will recalculate the suggested weight angle NOTE You can experiment with different remove keep combinations by repeating this process Press agai...

Страница 240: ... Enter the weight of the first split weight Press 7 Press First Angle 8 Enter the proposed angle of the first weight Press The instrument will suggest the second trim weight placement angle and size beside Second Weight and Second Angle The effective single weight equivalent of the new split weights solution will be displayed beside Resultant Weight and Resultant Angle If required you can also man...

Страница 241: ...Section 11 Balancing Rotors 230 Splitting a weight ...

Страница 242: ...radius To reposition trim weight along the balance radius 1 Take a trim reading 2 Press to display the Balance Weight menu or press Balance Readings from the Balancing menu 3 Press Change Radius Plane A or Plane B The Change Radius screen opens 4 Press Old Radius 5 Enter the current radius position Press NOTE The value can be in any distance unit feet inches meters etc Only the ratio between the o...

Страница 243: ... All balancing jobs associated with that machine will display in the Recordings column on the right 4 Press to select the Recordings column A black border will display around it indicating you can now browse through the recordings The newest balance job is highlighted at the top of the column 5 Press to display the selected recording or use the up down arrows on the left to select another 6 Press ...

Страница 244: ...ancing Dual plane balancing requires additional steps These are indicated with the dual plane symbol This section explains how to perform the following tasks Take initial unbalance measurements Set up and apply trial weights Balance the rotor using correction weights Perform trim balancing to further reduce vibration Save and review your balancing job Produce balancing reports ...

Страница 245: ...New Balance Job To set up a new balance job 1 Press Balance on the menu Press New Job to clear any previous settings 2 Press Setup 3 Use the options in the Balance Setup menu to choose the required settings for your balancing job Set up new balance job ...

Страница 246: ...tachometer see Setting up the Tachometer 4 Start the machine Let the rotor settle to its normal operating speed NOTE Because the vibration level depends on the speed of the rotor it is important to take all readings while the rotor is operating at its normal speed 5 Press from the Balance Setup menu to take the initial reading The initial reading measures the out of balance level of the rotor 6 Af...

Страница 247: ...Section 12 Balancing Walkthrough 236 Taking an initial reading ...

Страница 248: ...s NOT too small as its effect will be imperceptible Your trial weight must be of sufficient mass to change the imbalance by approximately 30 in amplitude or 30 in phase these figures are the industry norm The change must be seen by at least one sensor for each Trial reading This will enable the instrument to calculate accurately 4 Ensure the trial weight position is close to the rim of the rotor N...

Страница 249: ...ht 12 Replace the safety covers 13 Start the machine again 14 Let the rotor settle to its normal operating speed 15 Press to take a reading of the imbalance with the trial weight added After a few seconds the instrument displays the speed of the rotor in RPM and Hz the vibration level with the trial weight added ...

Страница 250: ...ect the imbalance the instrument will display a warning prompt You can redo the trial reading several times if required or continue with balancing 17 Press the appropriate key when the instrument displays the prompt Will the Trial Weight be removed now NOTE You can redo the trial reading several times if required or continue with balancing ...

Страница 251: ...ce Weight menu displays when you complete the Initial and Trial Readings Your instrument displays the weight required to correct the initial imbalance and the angular position at which it must be attached To balance the rotor 1 Stop the machine IMPORTANT If you are removing trial weights as you go ensure you do this before attaching your correction weight 2 Attach or remove the recommended correct...

Страница 252: ...the vibration level with the imbalance corrected 5 Press to accept this measurement The instrument displays the details of the additional weight adjustments required to trim balance the rotor i e to further reduce the level of vibration imbalance You can end balancing at this point or continue with another reposition of trim balance weights as indicated to improve on the balance level Repeat trim ...

Страница 253: ...tep 6 View or Save Balancing Job If required you can view and save your balancing job optional Press to view the Balancing Report menu This displays the results of your initial and trial readings the balance reading and trim balances Accessing a Balancing report ...

Страница 254: ...ancing Report menu 2 Select or create a machine to save the balancing job to 3 Press The balance job will be saved to the same machine in your Ascent database the next time you transfer the containing folder to your computer NOTE You can save multiple balance jobs to a single machine to create a history of balancing ...

Страница 255: ...nstrument s flash memory Upgrade your instrument s firmware Set Date and Time You can set the time in 12 or 24 hour format Recordings are date and time stamped according to this clock Your instrument adjusts the date and time automatically to accommodate leap years and daylight saving You can also select your local time zone automatically To set the date and time 1 Press Options on the main menu 2...

Страница 256: ...ly to cycle between date display formats e g from DD MM YYYY to MM DD YYYY 4 Press to toggle between 12 and 24 hour time formats Select Local Time Zone To select your local time zone 1 Press Options on the main menu 2 Press Date Time 3 Press Edit Time zone 4 Use the arrow keys to select your local time zone Press TIP Use and to jump to the top or bottom of the list ...

Страница 257: ... also deactivate the automatic adjustment to Daylight Saving To access these options 1 Press Options 2 Press Date Time 3 Press Daylight Saving repeatedly to toggle between the available options Auto Adjust Do Not Adjust NOTE If your country is not listed in the available time zones you will need to select a country with the same GMT offset Once you have done this ensure you set the Daylight Saving...

Страница 258: ...pport more than one language To change the language displayed on your instrument 1 Press Options on the main menu 2 Press Language 3 Use the arrow keys on the left to select a language The two windows at the bottom of the screen demonstrate how the language selected will appear 4 Press to save your language selection Adjust Screen Contrast You can adjust the contrast on your screen To do this 1 Pr...

Страница 259: ...me Your instrument can estimate its operating time based on the amount of current remaining in the battery and the average current usage The true operating time before the battery runs flat will depend on how you use the instrument To check the estimated operating time remaining 1 Press Options on the main menu 2 Press Battery Pwr Mngmnt NOTE The battery State percentage value and Time Left figure...

Страница 260: ...acklight brightness and timeout period Sleep Mode timeout Shutdown timeout Set Backlight Timeout The backlight will switch off automatically once the timeout period has elapsed 60 seconds by default If a measuring period exceeds the backlight timeout the backlight will remain on during measuring and switch off when measuring is complete To change the default timeout period for the backlight 1 Pres...

Страница 261: ...imeout period has elapsed When recording a route powering up the instrument from Sleep mode will return you to the last displayed menu In all other cases your instrument will display the main menu Change Default Sleep Mode Timeout To change the default time period for Sleep mode timeout 1 Press Options on the main menu 2 Press Battery Pwr Mngmnt 3 Press Enter Sleep Mode Enter a value in minutes mi...

Страница 262: ...999 5 Press Manage Instrument Memory Your instrument s internal memory requires occasional maintenance to ensure it operates efficiently Storing large numbers of recordings on your instrument significantly extends data transfer time As with PCs the storage performance decreases as the instrument memory gets fragmented with use The following topics explain How to check the available memory on your ...

Страница 263: ...rument Memory Warnings Approximately one third of your instrument s 1 GB of internal memory is taken up by system data All remaining data capacity is available for recordings notes and routes This free memory is capable of accommodating significant amounts of measurement data It is possible for your instrument s memory to become full if large numbers of high resolution recordings are taken over a ...

Страница 264: ...emain until the memory use has been reduced to below 80 You can accomplish this by deleting recordings or folders from your instrument or emptying the recycle bin on your instrument 80 memory capacity warning A message will also display to warn you of high memory use This message will appear shortly after the 80 threshold is crossed regardless of the screen currently being viewed and will require ...

Страница 265: ...umption exceeds 80 of your instrument s 1 GB memory capacity Instrument memory on Ascent Send window 95 Memory Capacity Warning If memory use is allowed to exceed 95 of your instrument s capacity a second message will display to warn you of high memory use 100 Memory Capacity Warning If your instrument s memory use is allowed to reach 100 of its maximum capacity a message will display to advise yo...

Страница 266: ...t Measurements within the folder will be deleted from your instrument Formatting your instrument s memory will also increase available memory by deleting all machines routes and recordings MORE See Reformat Memory Card Emptying your instrument s recycle bin will also achieve this MORE See Empty Recycle Bin To manually delete individual folders from your instrument 1 Press Folders USB Export from t...

Страница 267: ... will delete all routes machines parameter sets notes and recordings This returns the device s memory to its original blank factory configuration The formatting process will take about ten minutes NOTE If you wish to retain data stored on your instrument you can use Ascent to retrieve this information from your instrument before formatting The formatting process will delete all data on your instru...

Страница 268: ...dditional memory capacity on your instrument you can empty the recycle bin removing these backup files If you do this all folders in the recycle bin will also be erased during an instrument Proflash To empty your instrument s recycle bin 1 Press Folders USB Export on the main menu 2 Press You will be asked to confirm you wish to empty the recycle bin 3 Press to proceed or to cancel ...

Страница 269: ...memory failure your instrument will automatically prompt you to overwrite the bad primary database with the good mirror database when you switch it on To overwrite your current system database with the mirror backup database 1 Press Options on the main menu 2 Press Memory System to open the Memory screen 3 Press Swap to Mirror DB 4 Press to overwrite the primary database with the mirror backup or ...

Страница 270: ...mware Restoring your instrument firmware will reset the instrument to its factory state This action should only be taken if a conflict arises with a new firmware version or if the installed instrument firmware becomes corrupt PCB Revision This is your instrument PCB board version Possible revisions are C D and E Revision E versions include USB host ports and C1D2 CSA certification Revision C and D...

Страница 271: ...ill receive a license for it which you can apply to your instrument using Ascent If you purchase additional features you can easily review the licensing status of these at any time To do this 1 Press Options 2 Press Model Features MORE Contact your local sales representative to arrange a license for a feature you wish to add Click here to learn how to apply your license in Ascent Checking the lice...

Страница 272: ...are file WARNING Proflashing will restore the instrument to the factory default state and delete all stored information This includes folders routes machines parameter sets recordings and balance jobs If you wish to save any of this information please transfer all folders to the software before Proflashing your instrument To check if a newer firmware version is available visit http www commtest co...

Страница 273: ... its serial number NOTE If the vbX Properties window does NOT open immediately select your instrument from the Manage Instrument panel 7 Press Configure 8 Click the Proflash button under the Setup tab You will see a list the available firmware version s stored on your PC 9 Select the newest recommended firmware version 10 Click the Proflash button 11 Press on your instrument when prompted NOTE Pro...

Страница 274: ...ablish an Ethernet connection lost in Windows Vista Reset Instrument An unresponsive instrument one that does not respond when you press the keys will continue drawing power until it is reset or switched off To conserve power reset your instrument as soon as possible NOTE Resetting your instrument will NOT delete previously stored data or settings To reset your instrument hold and press Your instr...

Страница 275: ...lt network address to communicate Usually you will NOT need to change this However it is possible that this address may interact negatively with other devices on a network This conflict may result in other network connections being lost while your instrument is connected to your computer To resolve this conflict change the Ethernet network settings in your instrument and Ascent NOTE Your changes w...

Страница 276: ...DHCP Press to reset and apply your changes Press Enter your new network IP values manually Press to reset the instrument hardware and apply your changes NOTE Dynamic Host Configuration Protocol DHCP is a network protocol that automatically configures TCP IP networked devices Reset Network Values to Factory Default To reset the network values to the factory default 1 Press Options on the main menu ...

Страница 277: ...ection X icon Select Properties TIP You can identify the correct icon by the subheading vbX X if X is the USB port number 4 Deselect the checkbox beside Internet Protocol Version 6 TCP IPv6 under This connection uses the following items 5 Click OK NOTE Disabling IPv6 will prevent you from using Windows Meeting Space or any application that relies on the Windows Peer to Peer Networking platform or ...

Страница 278: ...0 Amplitude and phase 71 AR against rotation 237 Averaging 121 234 exponential 122 linear 122 number of 122 overlap 122 peak hold 122 time synchronous 59 B Balance weights 229 234 placing 237 Balancing against rotation 237 circumferance arc 229 degrees 229 fixed positions 229 initial reading 224 233 247 reference mark 229 233 236 report 244 254 trial reading 224 249 trim balance 224 239 253 units ...

Страница 279: ...48 150 working with multiple charts 146 147 zooming 145 Zooming charts 145 Connect instrument to wireless network 172 Connect to Wi Fi Network 169 Connections 11 Copying items 34 211 Cross channel phase 71 CSA certification 6 Cursors 142 D Data export 164 Date and time 256 257 Deleting items 213 all stored information 222 folders 205 notes 220 221 recordings 133 198 221 restoring 205 routes 199 se...

Страница 280: ...rsors 142 Hazardous locations 6 I Incompatible sensor 214 Initial reading 224 247 Instrument I O ports 11 K Keypad entries 22 101 Keyphasor 40 L Language setting 259 LCD screen 259 260 Linear averaging 122 Log range 148 M Machines defining working with 207 Measurements measurements analyzing 141 order tracked 103 104 saving 155 taking 136 137 Memory capacity 201 268 available amount 265 deleting a...

Страница 281: ...eak hold averaging 122 Phase angles 58 65 67 71 PROFLASH firmware upgrading 274 R Receive Data Remotely on Instrument from Ascent 167 Recordings deleting 133 221 multi channel 108 111 reviewing 131 saving 129 taking 127 Remote Comms on your Instrument 166 Report balancing 244 254 Resolution 121 125 Revs waveforms 155 Routes working with 176 off route recordings 199 skipping route entries 191 RPM s...

Страница 282: ...45 48 System information 272 T Tachometer 38 58 from a strobe 48 triggering 121 Time synchronous averaging 59 Trial reading 224 249 Trim balance 224 253 Troubleshooting 276 network communications 277 Resetting the instrument 276 restore a deleted folder 205 U UFF Export 175 Upgrading the instrument 274 USB 11 USB flash device 164 V vdB 150 scaling 148 150 units 148 150 W Windowing 124 WR with rota...

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