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ADASH Ltd.

Adash 4400 – VA4Pro

For further technical and contact information visit www.adash.eu, email: [email protected]

103

Octave Analysis

Using of this mode is similar to Analyzer mode. You need to create Set and Measurements like in Analyzer.

Measurement parameters are:

Type

octave spectrum

sound level

the sound pressure level in dB is defined as 20log

10

(p

RMS

/p

0

),

p

0

=0,00002 Pa ( p is sound pressure)

equivalent sound level

when during time interval the sound level changes, then the

equivalent sound level is the average sound level of the whole interval.

Channel

1 - 4

Unit

the unit of measurement ( has to be compatible with sensor settings)

Resolution

1/1, 1/3, 1/12, 1/24

Frequency Range

high

16 - 16000 Hz for noise measurements (central octave frequencies)

low

1 - 1000 Hz for vibrations

Frequency Weighting

none, A, B, C, D

The human ear has the subjective characteristics known as the loudness. It is the function of sound intensity
and frequency. For example the 20Hz pure tone with sound level 20dB would be clearly audible. The 100Hz
with the same level would not be heard, it lies below the threshold of hearing. The unit of loudness is phon. The
loudness level in phons of any sound is defined as being numerically equal to the intensity level in dB of a
1000Hz tone. The purpose of weighting is to make the readings correspond as closely as possible to the
loudness level. Historically four weighting were defined:

A

used for loudness levels below 55 phons.

B

used for loudness levels between 55 and 85 phons.

C

used for loudness levels over 85 phons.

D

used especially for aircraft noise.

However today is A-weighting frequently specified for measurements irrespective of level.

Averaging

linear

the standard arithmetic mean for every line

peak hold

the maximum value during the measurement for every line

exponential

the continuous measurement where the older spectra have less weighting then

the newer

Avg

number of averages

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Содержание 4400 VA4 Pro

Страница 1: ...Adash 4400 VA4 Pro Ver 2 55 December 06 2016 User Manual ...

Страница 2: ...ta Processing 11 Run the instrument on your computer 11 How to work with Menu 12 Item selection 12 User defined values 12 Multi selection of items 14 Searching of item 14 Input channels 15 IN1 socket 15 IN2 socket 15 IN3 socket 16 IN4 socket 16 TRIG socket 16 Standard cable wiring 17 A4409 BNC Box 18 Sensors properties 19 AC sensors 19 ISO 10816 Machine Groups 20 Bearing Settings 20 DC sensors 21 ...

Страница 3: ...s 41 CSV file description 42 Next functions available for list of projects 42 Functions for Set 42 Enter speed 43 Cancel speed 43 Measurement Definition in the Set 43 Input Buffering 44 Band fmin Hz HP filtering 45 The Analyzer buttons description 45 The Arrow Mode button 45 The Start OK button 46 The Stop Cancel Back and Close button 46 Graph Max Min 46 Graph Properties 46 Overall measurement 52 ...

Страница 4: ...ss in plane 1 74 RUN 2 with trial mass in plane 2 75 RUN 2 Result screen 76 The RUN 3 screen 77 Trim Screens 78 Balancing Errors 78 The effect of trial weight is low 78 The RunUp 79 Measurement Control 79 The Set and other items 79 Run up measurement 79 Menu Trend 80 The Route 82 Loading of the route to the instrument 82 Creation of the route tree 82 Route measurement 82 Reference values 84 Manual...

Страница 5: ...99 Playback Settings 99 The Lubri the greasing control 100 Two Possible Ways How to Measure 100 The procedure 101 Octave Analysis 103 Bump Test 105 Settings 105 Amplitude trigger setting 105 Response spectrum 106 Analyse 107 ADS 108 ADS project 108 Import of project from computer to VA4 108 Rewriting of geometry 108 Project menu 108 Copy 109 Rename 109 Delete 109 Clear Data 109 Export Data 109 Exp...

Страница 6: ...nse file 118 Update 118 Operation 118 VA4_DISC 118 VA4_DISC Folders Structure 118 A4410 Virtual unit with the DDS connection 119 A4410 Virtual unit and A4400 VA4Pro connection 119 Copying projects to the VA4Pro instrument 119 Projects and records copy from the VA4Pro instrument 119 The Virtual Unit vs the real instrument differences 120 Appendix A Technical Specification 121 Inputs 121 Dynamic Cha...

Страница 7: ...s and features are added often Such additions also require changes in manual and that changes can be very time expensive That is why we do not change all pictures in the manual so that are related to the latest version Some pictures which are usually only backgrounds remain in the manual although they were changed already Certainly it is acceptable only on places where such background has no conse...

Страница 8: ...P powering AC channels voltage higher then 18 V peak can damage the instrument DC channels voltage higher then 30 V peak can damage the instrument Always use only original cables designed for connection with sensor Long push and hold of POWER button evokes incorrect instrument switching off Data could be lost If you are unsure contact your distributor or the manufacturer PC USB connection warning ...

Страница 9: ...charging even if the indicator does not light the indicator will start light eventually To avoid deep discharge of the unit charge the unit regularly even when you don t use it We recommend you to check if it is charged every 3 months WHAT TO DO WHEN YOU CANNOT SWITCH ON THE UNIT WHEN THE UNIT CANNOT BE CHARGED NORMALLY Discharged battery battery needs to be charged charging for approximately 3 ho...

Страница 10: ...n on the main screen in the Global menu is the Power Off item available Auto switch off If no button is pushed in 5 minutes from switching on the unit will be switched off The emergency switch off This is not correct method to switch off the instrument Using it can cause data corruption Use this method only in case of emergency eg when the system freezes Push and hold the POWER button for about 5 ...

Страница 11: ...n the RST hole Next LED is near each input connector green OK no light no measurement is taken in this input red error usually ICP error Note During the measurement are functional only LEDs for inputs used for measurement e g red LED ends the lighting during the measurement and starts again after it Virtual Analyzers Data Processing When older Analyzers would take more measurements they took them ...

Страница 12: ...ars after you push the Sensors button Use the arrow buttons for one item selection e g AC2 Then push OK button The second menu appears Again use the arrow button for one item selection Then push the right arrow button to display possible parameters of selected item E g for Sensitivity you see this picture User defined values Again use the arrow button for one sensitivity selection 1 10 100 In most...

Страница 13: ...or further technical and contact information visit www adash eu email info adash cz 13 Use the buttons and enter required value e g 45 If you need to edit the value push the Shift button The buttons change the functions of buttons ...

Страница 14: ...e mobile phones keypad for second character selection you must press the button two times Multi selection of items Sometimes you could need to work with more then one item together The usual example is the deleting of more items in one step The left bottom button Multi on enables to select more items at once Press the Multi on button When you move in the list by arrows the items remain selected re...

Страница 15: ... for trigger signals usually tacho All sockets have several pins It enables to connect more signals to one socket see wire diagrams The AC inputs enable to measure max voltage peak 12V The DC channels enable to measure max 24V IN1 socket 1 CH1 AC INPUT 2 GROUND 3 20V DC OUTPUT max 10mA for eventual sensor powering 4 SHIELDING 5 NOT USED 6 CH1 DC INPUT 7 NOT USED IN2 socket 1 CH2 AC INPUT 2 GROUND ...

Страница 16: ... INPUT 4 SHIELDING 5 CH4 DC INPUT 6 CH3 DC INPUT 7 CH2 DC INPUT Pay attention to possibility of connecting all four DC channels to IN3 IN4 socket 1 CH4 AC INPUT 2 GROUND 3 20V DC OUTPUT max 10mA 4 SHIELDING 5 NOT USED 6 CH4 DC INPUT 7 NOT USED TRIG socket 1 GROUND 2 NOT USED 3 NOT USED 4 5 V OUTPUT 50 mA for tacho power supplying 5 TRIG INPUT for tacho signal ...

Страница 17: ...1 The second sensor wire is connected to the ground pin 2 When you use this cable In IN1 socket the signal will be measured on CH1 In IN2 socket the signal will be measured on CH2 In IN3 socket the signal will be measured on CH3 In IN4 socket the signal will be measured on CH4 ver 2 0 and higher If you want to use the 3 direction sensor then you should use the IN2 socket pins 3 1 5 ground pin 2 Yo...

Страница 18: ...t connectors are used on the top panel for connection of 4 AC channels and 4 DC channels On the side panel are two Binder connectors which enable to connect all 4 AC channels to IN2 input and all 4 DC channels to IN3 input See the wiring diagram of IN2 and IN3 in previous chapter You see that all 4 AC channels can be connected to one input IN2 In the same way all 4 DC channels can be connected to ...

Страница 19: ... group bearing All AC Sensors setting of all AC channels together All Bearings setting of one bearing to all AC channels All ISO setting of one ISO 10816 group to all AC channels DC1 DC4 setting of each DC channel properties All DC sensors setting of all DC channels Tacho setting of tacho channel properties Settling Prolongation if you need longer time for sensor settling use this item AC sensors ...

Страница 20: ...SO 10816 Machine Groups You can set the appropriate machine group according the ISO 10816 for each channel separately or for all channels together ISO 10816 Classification of machinery These parameters are used for limit values according to machine type nominal power or shaft height Bearing Settings The fault bearing frequencies can be displayed in spectra The bearing type definition is required f...

Страница 21: ...n of fault frequencies the selection of rotating race is required DC sensors DC sensors are used for discrete current signals e g temperature pressure After selection of DC1 DC4 or All DC Channels item the sensor properties menu appears Sensitivity mV unit sensitivity value Offset mV offset value Unit unit selected from the list or user unit Position the angle of sensor see picture above Usually u...

Страница 22: ...that there is one puls per one revolution In other words it means how long the instrument will wait for two tacho pulses the speed is calculated from the time between two pulses When the pulses are missing then the NO SPEED error is displayed When you choose 1Hz then the waiting interval is 1 second When you enter 0 1Hz then you will wait 10 seconds You should be aware of time prolongation of each...

Страница 23: ...functions are understood as Global parameters The definition is made by Global button Power Off Additional way for switching off Brightness Screen brightness settings for instruments made after November 2013 Screenshot The screenshot will be saved in bmp format to the Screenshots folder on VA4_DISC It contains sub folders for each mode The About Help Displays html version of manual ...

Страница 24: ...change s see RunUp Mode section The RunUp Mode must be time for value entry Every measurement must be triggered it means started When you press the Start button for taking the measurement you run only the preparation When everything is ready to take the data then the Trigger Source item is applied In RunUp mode is the frequency of measurements controlled by RunUp Mode at first Then is applied the ...

Страница 25: ...hat the time signal will be taken later then trigger pulse Ampl Trig Channel 1 2 3 4 The number of channel which will be used for amplitude triggering Ampl Trig Level unit value See the description of amplitude mode Trigger Source section The unit is the unit of sensor on selected channel Ampl Trig Channel External Trig Edge rising falling edge for triggering External Trig Level V See the descript...

Страница 26: ...32 128 256 512 1024 the number of displayed spectra in cascade graph It is not the number of measured spectra Date Format yyyy mm dd dd mm yy mm dd yyyy the a m p m is used Language ENG CZE select your language Align Graphs on off if more graphs of the same type are displayed then the Zoom and Cursor function of all graphs can be aligned Graph Grid on off Cursor Type linear maxs this item must be ...

Страница 27: ...e cursor manually the the next reading will always start from that position Appearance Background Color black white setting of background and other colors You can create your own colors profile Use the create item below the black and white The col cpy will be creted on VA4_DISC You can change the RGB value of all colors and then save it with new name When the instrument is switched on then all cpy...

Страница 28: ... can set in Graph Properties functions which are accessible in every graph Axe Y lin log this parameter you can set in Graph Properties functions which are accessible in every graph Peaks list on off the list of peaks can be displayed in each spectrum graph Graph Lines continuous discrete the spectrum can be drawn as line through the tops of line or as discrete vertical line for each frequency Dat...

Страница 29: ...Press the Save button and all notes are saved to memory Profiles All instrument parameters can be saved to the Profile It is useful e g for saving of sensor sensitivities Save settings to name saves the parameters to the Profile which was opened Save settings as new profile save the parameters to the new Profile after name entry Factory opens the factory default Profile list of saved profiles acc_...

Страница 30: ...ADASH Ltd Adash 4400 VA4Pro For further technical and contact information visit www adash eu email info adash cz 30 If you work with Virtual unit on your computer use the Default Rec for testing ...

Страница 31: ...nstrument from the computer Switch on the instrument to the main screen Push the Update button Select the required update file from the list more version files can be saved in the instrument Press OK The main screen window is closed now The procedure of update is described in the new command window After the update the main screen appears again Update of bearing database The bearing database you c...

Страница 32: ...splayed in the right bottom corner of the display When the capacity is more then 30 the green symbol appears When the capacity is 10 30 the yellow symbol is used Under the 10 the red symbol appears If less then 6 the lifetime image begins to blink At that time the running measurements are stopped The next measurement is not enabled When the 3 is achieved the unit will switch off ...

Страница 33: ...reen near the button Such dynamic approach enables to use one button for many functions depending of the actual needs Control and Menu buttons Control buttons with the description are on the left and right screen side The Menu items with the description are displayed in the bottom of the screen The Shift button The Shift button changes the purposes of buttons It is used for numerical and text inpu...

Страница 34: ...list The highest amplitude speed in on the top of list The spectrum is displayed also Select the correct value and press OK If no value in the list is correct then select manual entry and enter the speed manually If no value of speed is defined in this window then the readings will be taken without it The speed detection is available only when vibration sensor is used for point reading In other ca...

Страница 35: ...contain your often used sets of measurement Then you select one Set and run it The taking off all measurements included in the set is made simultaneously See also Virtual Analyzers section for better understanding The Project You can use only various Sets for analyzing But sometimes you can need the more structured items then simple Set Such items we call Projects Examples Meas_Point_A This is onl...

Страница 36: ... First Analyzer screen The first Analyzer screen contains the list of Projects saved in the memory or the empty list when no Projects were saved The time and date of last saving of selected project is displayed in top right corner New Project Set creation Push the Project button Them menu appears select New Set item ...

Страница 37: ... button and select New L1 Set item Enter the name on Level 1 e g machine name and press OK The Project list appears alphabetical order The L1 letter after the name is the Level 1 type indication L1 item is selected Push OK The item will be opened and the list of included Sets appears now it is empty Push the Set button and select New item Enter name and push OK The list of sets appears Use the Clo...

Страница 38: ...ect New Enter the name of new Level 1 item The L1 list appears Open the L1 item and create the Set in the same way as it the previous section Use the Back and Close Project buttons to return to the Project list New Meas creation Select the set from Set list of selected Project and press OK Press the Meas button and select New Basic or New Advanced New Basic You can create the new Meas by two ways ...

Страница 39: ...ADASH Ltd Adash 4400 VA4Pro For further technical and contact information visit www adash eu email info adash cz 39 ...

Страница 40: ...s that only input DSP filter is applied approx 0 6 Hz Band fmax Hz value The high cut off frequency of band pass filter which is applied to the signal before evaluation Under this item is also displayed the information about sampling frequency fs which be applied for evaluation DEMOD fmin Hz value The low cut off frequency of band pass filter which is applied to the signal removing low frequencies...

Страница 41: ... frequency near the speed Example the speed is 25Hz The resolution is speed 4 i e 6 25Hz The speed line bandwidth in FFT will be 6 25Hz It means that speed line contains all frequencies in the interval 21 875 28 125 If any disturbing frequency is in that interval then higher resolution must be used Frequency speed value the frequency value for phase shift measurement can be entered manually value ...

Страница 42: ...itude max trigger Orders order amplitude phase Frf frequency amplitude phase coherence Octave spectrum frequency amplitude Next functions available for list of projects Copy copy of selected item to the new one Rename renames selected item Delete erases selected item Clear Data erases measured data in selected item Notes see the Route chapter for details Export copy of selected item to the VA4_DIS...

Страница 43: ... to the same position in the head of data as the speed measured by tacho If the speed is manually entered and also measured by tacho then the tacho has priority and it is saved The manually entered speed is displayed on the right side at the top of the screen with the word Speed You should notice that the speed value is saved to the head of data That is why you have to use the Tacho factor Machine...

Страница 44: ...rement is taken Every graph on the screen contains one measurement More screens with graphs can be developed The description of each graph is in the top Example The translation Meas No 1 RMS value Channel 1 Applied band filter 10 1000Hz Number of Samples of the signal 4096 Time length of signal 1s The Signal means the time signal from which the evaluation was made The translation Meas No 3 Spectru...

Страница 45: ...et it in Band fmin Hz parameter You can select the none 1 2 10 and user filter The none value is available only for direct measurement without integration The none value does not mean the DC part measurement The HP filter on A D converter is always used But no additional filter is used The frequency range with none filtering begins on 0 35 Hz 3dB point See the response graph The Analyzer buttons d...

Страница 46: ...firm the selections or entries The Stop Cancel Back and Close button This left middle button has more purposes and it can STOP the measurement Cancel the definition or selection in menu items Back moves back in structure of project Close closes the measurement screen and returns you to the project list Graph Max Min Maximizes or minimizes the selected graph to the whole screen or returns back to t...

Страница 47: ...sor computation manual entry available Axe X lin log Axe Y lin log Axe Z time scale according time of measurements speed scale according the speed of machine tacho must be used regular regular scale Order Z first in front last in front the order of measurements on Y axe Detect Type RMS 0 P P P Y axe type Peaks List on off the 5 highest spectrum lines table Synch Table on off table of values synchr...

Страница 48: ...eviation average Xmax maximum value Xmin minimum value Xmax Xmin the interval of measured values Primary Cursor when the Global Cursor Type is set to max then is required to select the quantity graph to which will be this max searching function applied amplitude phase coherence for frequency response Frf X Y for orbit View center line center line standard 2D center line view available only for Vie...

Страница 49: ...dash eu email info adash cz 49 ap_s the trends of amplitude and phase related to speed ad_s the trends of amplitude upper graph and difference amplitude lower graph related to speed the difference is related to the trend cursor position in that point is always zero polar 2D complex view ...

Страница 50: ...nded to Z axe time scale View phase shift available only for trend linear graph of phase shift amplitude ratio and coherence related to the time scale polar polar plot of phase shift and amplitude ratio View spectrum available for trend amplitude one spectrum amplitude graph cascade waterfall graph spectrograph 2D view of amplitudes vs time phase one spectrum phase graph ...

Страница 51: ...iew AB two input time signals from channels A and B XY two time signals transferred to X and Y axes Speed Period on off the speed time period is displayed FTF Period on off the FTF time period is displayed BSF Period on off the BSF time period is displayed BPFO Period on off the BPFO time period is displayed BPFI Period on off the BPFI time period is displayed Graph Lines continuous discrete the s...

Страница 52: ...r then RMS value Let s change the Avg to 8 The eight individual values 1 sec length will be taken and the result will be the linear average of them RV V1 V2 V8 8 The indication 8 8 is on the right top Let s change the Avg back to off and change the samples number to 32768 The measurement will be 8 sec long You see that the result is different from the previous value It is clear the max 0 P value i...

Страница 53: ...ocity measurement in 10 1000Hz range and the group for machine see Global ISO Machine Settings The color of circle is related to the machine condition class A B C D the green for A or B the orange for C and the red for D Also the information about machine group and foundation are displayed The limit which is exceeding is also displayed at the bottom G demod overall measurement It is very similar t...

Страница 54: ...ed to set the Global Trigger Settings Trigger Source tacho Then define the number of averages You see the effect of averaging in decreasing of signal noise The speed frequency is better seen With the cursor values are displayed also totRMS and tot0P values G demod time signal measurement This function enables to see the signal when the standard envelope demodulation is used The Unit cannot be chan...

Страница 55: ...email info adash cz 55 Orbit measurement The A1 means that the channel 1 is used for A orbit channel B2 channel 2 is used as B The position of A1 and B2 matches the sensor angles used for measurement see Sensors definition The knowledge of those angles enables to draw the correct shape of orbit ...

Страница 56: ...uency The t below the Lines is the time signal length which is used for one spectrum The df is the frequency resolution between lines The information in top right contains averaging 2 8 speed 42 1Hz and bellow them cursor position 16 5Hz order f speed 0 392 value 0 132mm s and total RMS of spectrum 0 619mm s The Band fmin defines the frequency of HP filtering which is used for DC part removing If ...

Страница 57: ...faster E g 75 overlap means that ending 75 of actual time signal 25 of new signal is used for next average G demod spectrum measurement Example the demodulated frequency 92Hz with harmonics The Unit cannot be changed only the acceleration g unit can be used No integration of signal is enabled Cepstrum measurement Used algorithm is cepstrum x inv fft log10 abs fft x ...

Страница 58: ...asured When the tacho sensor is used connected to the tacho input then the impulses is added to all AC inputs In the time signal graph are marked by short red lines The speed measurement is taken 8 times in every second The value is evaluated from 3 tacho events in time signal When the averaging is required then more values is used But keep in mind that only 8 values is taken in one second ACMT me...

Страница 59: ...speed 64 because you will wait for results longer much longer Use the small resolution only in cases when your signal contains two close frequencies and you need to separate them For 50Hz speed the speed 4 means the band 43 75Hz 56 25Hz and the speed 64 means 49 61Hz 50 39Hz Phase Shift The measurement of phase shift between two channel A and B amplitude ratio and coherence on speed frequency with...

Страница 60: ...lt contains phase shift value in degrees amplitude ratio ampl B ampl A coherence If the phase shift is reliable then the coherence must be bigger then 0 8 Frf frequency response function From ver 2 32 is the coherence displayed in the amplitude graph The short horizontal line on Y axe is on position of value 1 for coherence ...

Страница 61: ...itude the Pretrig to e g 25 select Ampl Trig Channel number and the Ampl Trig Level value Use the Arrow mode button and set Shift or Length top right buttons Now you can simply shift with FFT windows or change the length When you use the Shift1 button you change the Shift1 to Shift2 or to Shift12 shift both windows together by using the top left button Shift1 Shift2 Shift12 The frf function do not...

Страница 62: ...sition of shaft in bearing The signals from proximity sensors must be connected to DC channels We need to remove the AC part and to hold the DC part The DC inputs work in that way The Center line is related to the orbit measurement We also need to sensors with known angles of mounting While in orbit we see the shape around the 0 0 position in the center line we see the position of shaft center wit...

Страница 63: ...e speed detection is done before the measurement itself see the Speed detection chapter Note The speed can be assigned in advance functions Enter Speed or DDS Default Speed In those cases the speed detection does not take place There is detailed description in the FASIT mode chapter Record Creates and saves the record After the download to PC it is ready for using with VA4_Virtual Unit see the A44...

Страница 64: ...nitial measurement of vibration amplitude and phase in required number of planes Trial mass put on the rotor Step by step to all planes RUN 2 Trial mass response measurement Step by step to all planes Final masses put on all planes RUN 3 Check of effect success measurement Trim measurements for additional masses and better results The Project Screen Every step is displayed in one screen The moveme...

Страница 65: ... managing are enabled New when you select the New item then you will entry the name of new project The screen for manual entry was in details described in Menu how to work with section Copy creates the new project as the copy of selected project like Save As function in MS Word Only the header data are saved machine name balancing type No measured data are saved Rename renames the selected project...

Страница 66: ...balancing report in rtf format MS Word and save it to VA4_DISC for PC downloading Balancing Vectors the drawing of ampitude phase vector development during the balancing process The drawing is also included to the balancing report Description R1 RUN1 R3 RUN3 T1 T3 trims 1 3 Total Mass displays the total balancing mass It is the vector sum of all masses mounted to the rotor basic all trims ...

Страница 67: ...ts single dual one or two AC inputs sensors can be used only for dual planes balancing Channel 1 4 the number of AC input which will be used for sensor mounted on the bearing only for single plane balancing Channel A 1 4 the number of AC input which will be used for sensor mounted on the bearing A only for dual planes balancing Channel B 1 4 the number of AC input which will be used for sensor mou...

Страница 68: ...em in time You need to STOP the measurement when is displayed the value which you want to use Avg the averaging of more then one measured values is available Resolution read the explanation in the Meas functions New Advanced section Units Settings Amplitude selection from available units for used sensor Detect Type RMS 0 P P P Speed selection from available units for speed Mass selection of unit f...

Страница 69: ...ed bearing house is the recommended point for sensor mounting But you can use any other place which is suitable for measurements Press START button and measurement will be taken If you press the Edit button then you can manually enter all values balancing calculator function Use the Tab for shift between values Use the down arrow to move to the next screen ...

Страница 70: ...eight is displayed only if the Rotor settings parameters are entered Push START button for measurement Push Edit and all values can be manually entered balancing calculator function Use Tab in left for cursor movement After the RUN2 measurement the dynamic factor is displayed The DFA and DFP amplitude and phase values are the response values of standardized trial mass mm sRMS 1kg regardless the se...

Страница 71: ...ADASH Ltd Adash 4400 VA4Pro For further technical and contact information visit www adash eu email info adash cz 71 Use the down arrow to move to the next screen ...

Страница 72: ...ontinue in two ways The left side determines the mass if the trial mass is removed from the rotor The right side determines the mass if the trial mass is kept on the rotor If the number of blades was defined the final mass is divided to the nearest blades of the exact balancing angle The angle position is always measured from position of trial mass ...

Страница 73: ... the down arrow The TRIM 1 screen appears It is the same screen as RUN 3 screen Run the measurement or enter the values Then the new results effect and quality value are displayed Press the down arrow and continue with TRIM 2 in same way as with TRIM 1 You can use how many trims you want But when after trim the result is not better or even is worse the next trims has not sense Dual plane balancing...

Страница 74: ... to which should be just mount the trial mass If you defined the properties in Rotor Settings then the recommended trial mass is displayed Use the Enter Trial button for re entering of the trial mass if it is required The corresponding plane for trial mass mounting is demonstrated by the red disc After the measurement of plane 1 take the measurement on plane 2 or take them at once when you use 2 c...

Страница 75: ...ave decided to keep the trial masses option then the reminder message appears RUN 2 with trial mass in plane 2 The same two measurements we have to take with trial mass on plane 2 The screen for those measurement looks similarly like previous screen Only the red disc is in the plane 2 Press down arrow button after both measurements The RUN 2 completed screen is in the next picture ...

Страница 76: ...email info adash cz 76 Press down arrow The same reminder message appears as in last run RUN 2 Result screen Mount the final masses to both planes The angle is applied from trial mass position which represents the 0 zero degrees In case you have used blades the result screen may look like that ...

Страница 77: ...asses are mounted then you want to check the job The measurements on both planes are required The screen is in fact the same as screen for RUN 1 with additional information RUN1 original amplitude of RUN1 Effect is the reduction of vibrations in Quality balancing quality factor according ISO 1940 mass of rotor and radius of balancing required ...

Страница 78: ...warnings can occur during the job The effect of trial weight is low This message informs you that the effect of the trial mass is low The percentual value is derived from ratio amplitude of change vector amplitude of RUN1 vector The percentage value is derived from the ratio amplitude of vector change amplitude of RUN 1 vector A warning is displayed when the change is less than 20 but bigger than ...

Страница 79: ...e speed changes from previous measurement of defined value e g 10 RPM Also the time can be used to control that procedure Then you can take the measurement in defined time interval e g each 60 sec The asap is the next choice It means no delay between measurements As Soon As Possible Be careful for such mode You can use all memory quickly The last choice is the Manual mode You can press the Start b...

Страница 80: ... date and time of measurement is displayed Select one trend from the list and press OK If the analyze is made from record then two time stamps are displayed The analyze time is the first and the measurement time is the second One runup measurement can be divided into more files e g runup is very long See the Global Runup chapter Menu Trend When the list of trends is displayed then the Menu Trend b...

Страница 81: ...sh eu email info adash cz 81 The aps amplitude phase speed graphs appear Several types of graphs is available under the View item All items are in details described in chapter The Analyzer Mode The Analyzer buttons description Graph Properties Use Arrow Mode button for functions selection ...

Страница 82: ...rop You can see that the structure of tree is changed This is because in VA4Pro strictly requires the tree with the following structure Tree_Name Machine Measuring Point Data Cell If there are more items in DDS tree in a path between this items the names of such items are combined together like in this example Turbo Generator Fans Fan 1 or Motor L1RV etc If the item name in a route tree is longer ...

Страница 83: ...rrow to develop the list of measurement points The number of AC channels for each point is displayed behind the point name In this moment you can start the measurement or by right arrow display the list of measurements which are defined for this point The channel number is displayed in front of name of measurement By left arrow button you will close the displayed list and you return back to the pr...

Страница 84: ...ll be taken together The complete point measurement should be taken now The measured data are or are not displayed on the screen regarding the Display Route Values parameter in Global Settings Use the Back to return back to points list The measured point is labeled by the symbol all defined measurement were taken or by the cross some measurements were not taken due to error Reference values You ca...

Страница 85: ...rs after you press START button the window for manual input appears one for each manual input Notes You can attach the short text notes to route points There are three ways how handle with notes 1 Enter the note manually 2 Select predefined note from Factory notes set 3 Select predefined note from User notes This set is created and edited by user Press the button on the left bottom it can have mor...

Страница 86: ...ndow appears In the upper half area you can directly type the note The User notes list is displayed in the bottom The several ways how to create new note exist Select one note from User notes list and press Select Selected note is copied to the upper area Press User Factory button to change the User notes to Factory notes or back Then select the note and press Select ...

Страница 87: ...ist of notes The N letter appears behind the point name Export to VA4_DISC The computer can read any data from VA4_DISC only The route with measured data has to be exported to this memory before the transfer During the route measurement are data saved to the VA4 hard disc only When the route is closed the VA4 asks the user Export to VA4_DISC and user selects one option The export to VA4_DISC is no...

Страница 88: ...be set up on DDS as the tree item parameter Default Speed can by entered as a value or as a Variable Speed The Variable Speed is detected before the measurement itself see the Speed Detection chapter Detected speed is valid for whole machine Unless you close the machine item the same speed value is valid and no other detection takes place Speed entered in DDS has always priority before the speed e...

Страница 89: ...ize which is displayed in right upper corner New Record Run the Recorder The list of records which are saved already in the memory appears on the screen Push the Project New button and entry the name The new item appears in the list Select it and push OK Select the Sampling Frequency Switch to on all channels you want to record Define the length of record or how it will be stopped Select the Start...

Страница 90: ...nd OK The preview of recorded signals appears Project button New the new project for recording Copy copies all record parameters to new project without the recorded data Rename renames the project Delete deletes project from memory Clear Data deletes recorded data all record parameters is kept Notes adds the notice to the record see Global Properties User Notes chapter Export exports the record to...

Страница 91: ... wav range and better hearing from headphones 1 5 this range should be generally acceptable in most of cases max the 12V is used as range auto the reached maximum value in signal is used as range user any value from 0 1 12 interval If you need to compare two signals in headphones for example the noise of old and new bearing then the same range must be used When the range value is lower then the ra...

Страница 92: ... changes the arrows from Cursor Length to ZoomX Y Zoom X button It switches the display between complete record and the zoom selection made by Cursor Length Zoom Y button It is standard Y zooming Using of record for analyzing When you select the record for analyzing in any VA4 module then the preview appears on the top of display ...

Страница 93: ...to move the red border to the record There are two ways how to do it Analyzer Route and RunUp modes use the Arrow Mode button repetitively until the red border is on the record The rest of the modules use the Record button to select and de select the record Also the selection of record channel is available for preview the record can contain more channels then one Also the DC channels or speed chan...

Страница 94: ... up the parameters of the chosen sensor FASIT uses the measurement of acceleration or velocity from one channel If you will use a velocity sensor the bearing condition is not detected For bearing condition detection the acceleration measurement is necessary Units The displayed units can be set up under the Global Global Settings Set up the unit of speed Hz RPM CPS CPM in the Speed Unit item The vi...

Страница 95: ...of severity of individual faults The colours in pie chart correspond to the colours of the rectangle next to the individual graphs The 1x amp phase value and velocity spectrum with speed and harmonics marked by red triangles are displayed in the middle of screen Note the 1x amp phase value is displayed only when the speed is measured by a tacho probe The condition report and advises are in the bot...

Страница 96: ...y to determine the source of worse condition and plan repair for instance change the bearing or maintenance balancing alignment The space above red line is an DANGER condition and the machine should not be operated First figure contains the values for overall machine condition and you search unbalance misalignment and mechanical looseness above all They are called overall because we can measure th...

Страница 97: ...nfo adash cz 97 Machine limits The machine limits are used for velocity RMS value in 10 1000Hz frequency range This value helps to define the complete health of machine 0 0 1 0 2 0 3 0 4 0 5 0 6 0 0 500 1000 1500 2000 2500 3000 3500 4000 speed RPM Vel 10 1000Hz mm s RMS 0 0 04 0 08 0 12 0 16 0 2 0 24 ...

Страница 98: ...roller bearing limits are used for acceleration RMS value in 500 25600Hz frequency range 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 0 1000 2000 3000 4000 5000 6000 7000 8000 speed RPM Acc g RMS Unbalance Misalignment and Looseness The FASIT mode also advises you what the most probable source of vibration is The three individual bars are displayed ...

Страница 99: ...ush START Each input signal level will be displayed The TRUE PEAK level is displayed By buttons on the left side you choose the channel for listening The volumes buttons are on right side The delay of audio output Because all signal conditioning is digitally arranged the delay of signal appears Typically the delay is 1 sec You can clearly test to knock to the sensor and you will listen this knock ...

Страница 100: ... a bearing somehow and replenish only as much lubricant as is actually needed Controlled lubrication increases bearing service life and lowers costs for lubrication and repairs The main use of this Lubri mode is in the lubrication replenishment process During this process the mode measures the actual lubrication condition of a bearing and tells the operator when the amount of lubricant is ideal Th...

Страница 101: ...t pad is already mounted This pad can be used also for lubrication measurements The procedure 1 Mount the sensor near to the bearing Prepare the greasing gun for use 2 Select the Lubri Mode and the input channel which will be used for measurement Push the START button Then the instrument will automatically measure an actual lubrication state In the beginning the instrument takes the initial g RMS ...

Страница 102: ...ward the bearing however it is not there yet At the moment when the lubricant reaches the bearing the column decreases usually its red part disappears and only the green part remains You need to add a little more lubricant and if there is no further decrease you end the lubrication process If at the beginning of measurement value of vibrations and oilcan are green then the signal from a bearing is...

Страница 103: ...cs known as the loudness It is the function of sound intensity and frequency For example the 20Hz pure tone with sound level 20dB would be clearly audible The 100Hz with the same level would not be heard it lies below the threshold of hearing The unit of loudness is phon The loudness level in phons of any sound is defined as being numerically equal to the intensity level in dB of a 1000Hz tone The...

Страница 104: ...l info adash cz 104 Each spectrum is combined with two bars at the right side The total sound level L and the used weighting level A D are displayed The line over each line is the maximum peak reached during the measurement For each line is used also the short time peak memory It looks like snowing ...

Страница 105: ...contains two parts The level of amplitude trigger is found in the first part The response spectrum is developed in the second part Settings Channel channel with the accelerometer Hits number of hits Amplitude trigger setting In the first part of test we need to detect the correct value for triggering Make the hit and look the moving of the hand on display Make all hits with the same force More the...

Страница 106: ...spectrum In part 2 continue with hits The spectrum is displayed after first hit and the the average is used for next hits Look at the top right corner and make the hit only when the message Waiting for trigger is displayed You can stop the test anytime by Stop button Spectrum graph has the same properties like in Analyser mode ...

Страница 107: ...technical and contact information visit www adash eu email info adash cz 107 Analyse Using of the Peaks list helps to detect required frequencies Start repeats part 2 the same trigger level New test new test Export spectrum export to VA4_DISC ...

Страница 108: ...ort of project from computer to VA4 Copy the project file ads extension to VA4_DISC to the root or VA4ads folder The project will be moved to the VA4 memory after entering the ADS module The file in VA4_DISC will be deleted Rewriting of geometry Usually the user creates the simple geometry firstly and takes the measurements After that first test he changes the geometry adds the next points lines a...

Страница 109: ...measurements will be deleted Export Data Export of readings measurements to VA4_DISC File with dsd extension will be saved to VA4ads folder Here is prepared for download to the computer Export Project Exports both of data readings and geometry to VA4_DISC It could be useful when user wants to use A4410 Virtual Unit software for next readings ADS Settings The settings of parameters are required whe...

Страница 110: ...ference sensor is mounted to one point one direction on the machine and is on that place all the time The second sensors is moved sequentially to all other directions The change of Reference Direction number requires to delete all saved readings because they are not compatible with new reference direction number Frequency for Animation This frequency will be used for animation on VA4 screen It wor...

Страница 111: ...urement View Standard graph display The number of selected direction is displayed in front of measurement type 2 frf Machine Measurement View Both previous screens in one together The user can select one of them the red border and to work with it The different set of buttons are displayed for every selected area of screen ...

Страница 112: ...ADASH Ltd Adash 4400 VA4Pro For further technical and contact information visit www adash eu email info adash cz 112 ...

Страница 113: ...he new direction for measurement can be manually entered by Enter Direction button Zoom Move Rotation Zoom Move Rotation of machine Blink on Blink off The directions which are not measured yet can be blinking Hide on Hide off The directions which are measured yet can be hide Start Stop Animation Run or stop animation Enter Direction Manual entry for direction number Start Starts new measurement Bu...

Страница 114: ...4400 VA4Pro For further technical and contact information visit www adash eu email info adash cz 114 Save Saves the measurement reading In the first row are displayed direction number amplitude phase on selected speed ...

Страница 115: ...ng a leak you should turn in the other direction to determine if the sound is coming from behind you Use shields such as cardboard or to isolate the potential defect from other sources For airborne ultrasound the instrument microphone attachment will detect Air leaks Vacuum leaks Electrical Arcing Electrical Corona Tightness testing where a signal generator is located within a sealed unit then by ...

Страница 116: ... for pure sine Higher values means that transient shock events are in the sound signal The time waveform is displayed at the bottom of the screen Use Auto Scale button to fit the scale of the graph Press Stop to stop the reading Listening The ultrasound is demodulated to the frequencies around 1kHz and you can hear it in headphones Use the volume buttons to set the correct level Important note The...

Страница 117: ...use Installation Download uncompress the A4410_VirtualUnit_verXXXX zip file XXXX represents the version number and save it to selected disc and folder e g C VirtualUnit Compressed file contains A4410_VirtualUnit_verXXXX folder which contains 1 data folder for application data e g projects 2 bin folder with binary files 3 runme bat file for launching Attention A4410_VirtualUnit_verXXXX folder must ...

Страница 118: ...keep your data 1 Uncompress the new version to the new folder 2 Delete bin folder in the old version folder 3 Copy the bin folder from the new version to the old version folder 4 If the old version folder contains version number rewrite it to the new number it has no effect for running 5 Delete the new version folder Alternative instructions to keep your data 1 Uncompress the new version to the ne...

Страница 119: ... will be described in this chapter Connect the real Va4Pro instrument to the computer with installed Virtual unit via USB cable The VA4Pro unit will be found as VA4_DISC removable disc on your system It s possible to copy the data to and from the Virtual VA4_DISC folder Copying projects to the VA4Pro instrument Copy the A4410_VirtualUnit_verXXXX Data VA4analyser ProjectName project folder ProjectN...

Страница 120: ...ovable storage device appears Open VA4analyser folder on this device Find Power Station folder in this folder 3 Open A4410_VirtualUnit_verXXXX Data Va4analyser folder 4 Copy the Power Station folder from the VA4_DISC into the A4410_VirtualUnit_verXXXX Data Va4analyser folder The Virtual Unit vs the real instrument differences The Virtual unit use VA4_DISC directory for export and import instead of...

Страница 121: ...3 8 mA High pass filter 1Hz 12800 Hz user definition Low pass filter 25Hz 90000 Hz user definition Connector Binder 712 series Tacho Channel Number 1 independent tacho input Speed range 0 01Hz 1000 Hz Input impedance 80 kOhm Input type voltage Input range 10V only one range no gains or 30V tacho signal DC with optional tacho signal converter Accuracy 0 5 Trigger level 0 1 9 9 V user defined Input ...

Страница 122: ...meters 1 2 10th order Averaging 1 255 Overlap yes Smax Gap and Centerline displays for proximity sensors yes Recording Sampling frequency user defined in range 64Hz 196 kHz Record length example 3 GB for 1 hour record with 64kHz sampling 4ch AC 4ch DC 1ch tacho signal 100GB memory enables over 30 hours of full 64kHz recording lower sampling frequency enables much longer record Balancing Planes 1 o...

Страница 123: ... for pulse measurement which means the measured signal will very short e g 100ms When the time interval between pulses is in seconds we have low chance to catch it And we have no chance to have more pulses in one time signal 2 We need the low sampling frequency for long time record e g 10s to obtain more pulses in one signal But with such sampling we cannot measure the pulse because cut out by ant...

Страница 124: ...lly small amplitude They are often modulated by speed frequency We use standard measurement and result is in the next picture You see only speed sine wave and no or small pulses which are filtered by anti aliasing The standard ACMT is used in next picture We used the ACMT together with band pass filtering which removes the speed sine wave from the signal The all short pulses are held and amplitude...

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