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USER'S MANUAL SENDIG-903

1. 8 4 CLEANLINESS The SENDIG 903 is a delicate scientific instrument even though it is a portable field unit Reasonable care should be taken to avoid the ingestion of dust moisture etc into the unit The same care should be taken for the transducers In addition when you are finished with the measurement disconnected the transducer and trigger and stow them back in their storage compartments It is a good idea to wipe the cables down with a cloth to remove excess water as this can cause corrosion and mildew if trapped in the case Care should be taken not to spill any liquids inside the unit 9 SPECIFICATIONS Input signal Accelerometer and voltage Amplitude ranges amp Frequency Response Amplitude ranges Frequency Response Displacement 3 5000 um peak peak 10 500 Hz Velocity 0 2 200mm s true RMS 10 1000 Hz Acceleration 0 5 250m s _ peak 20 5000 Hz Envelope 0 1 20unit true RMS_ 5 1000Hz from 15 40 kHz Voltage 0 1 10V peak peak 10 2000 Hz Amplitude spectrum analysis 100 lines to 400 lines zoom Hanning windowed Frequency range of spectrum analysis 100 200 500 1k 2k 5k 10kHz Data storage 62 waveforms of 1024 points and 270 data sets Notepad 10 condition codes for visual inspection Output RS232C for communication with PC Power Ni MH rechargeable battery for 8 hours continuous operation low battery warning Operating Environment 0 55 C
2. 90 humidity non condensing Rotating speed measurement with photocell sensor Dynamic Range 60dB with 48dB adjustable gain range Anti aliasing filter 8th order elliptic low pass Dimensions 21x13x4 cm Weight 1 2 kg Include batteries Revision G 27 of 27 06 4 10 User s manual of SENDIG 903 INDEX C Communicate With Computer 20 D Demodulation Analysis 19 Dynamic Balance 20 l Planes Dynamic Balance 20 2 Planes Dynamic Balance 25 F Format Memory 17 P Process Process of 1 Planes Dynamic Balance 22 Process of 2 Planes Dynamic Balance 27 S Save Wave 18 Save Data 20 Spectrum analysis 18 Speed Measurement 16 Set Up Measure PointName Setting Up 8 Sens Scale Setting Up 12 Alarm Scale Setting Up 13 Trig Mode Setting Up 11 Input Mode Setting Up 9 AlmWv Mode Setting Up 9 Freq Range Setting Up 12 T Trial Mass 33 W Wave Form Analysis 18 Z Zoom of spectrum analysis 4 times 19 Revision G 28 of 28 Beijing SENDIG Technology LTD 06 4 10
3. E J KE 4 To Change After confirming all the settings we can measure as EIEN To kowe follows Attach the cables and mount the sensor and trigger correctly Refer to section 2 2 Switch the power on Refer to section 2 2 SENDIG 903 enters into the Measure Menu automatically After all the parameters are confirmed you can begin measuring by pressing lt Enter gt key The screen will show After a while such data will be displayed on the screen NEW data OLD date HFA KK KK K KK KK K m s ACC KK K K K KK OK K K m s VEL KK K K K KK K K K mm s Then you can see Now SENDIG 903 is collecting waveform according to the parameters of AlmWv Mode which is set up in Measure Menu After collecting waveform the result which is one of the following five will be displayed on the screen Battery Voltage Low Please Recharge it No Problem Found Not A Stable Signal Signal Too Strong Please Check it Signal Too Weak or Sensor Problem For Not A Stable Signal it indicates that measured signal possibly alters too fast You need to measure it again and SENDIG 903 will adjust the measuring range automatically for gaining the genuine signal For Signal Too Strong it suggests that the input signal is too strong indeed and the unit will alarm You can save the waveform and analyze it elaborately Revision G 11 of 11 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD When Signal
4. Then press lt Enter gt key to store the waveform and VEL Waveform the screen will display the serial number of the stored waveform The stored waveforms can t be erased except format memory SENDIG 903 can store 62 waveforms and display Memory Overflow when the memory is full Freq xxxx Hz Trig N Press Enter To Save Other Key To Quit Note You cannot save the waveform of the former measure point after the measure point s name has been changed 5 USING THE ANALYSE MENU SENDIG 903 shows the FFT spectrum with graphics mode Firstly set AlmWv Mode to decide which parameter to be analyzed Then measure the vibration After finishing the measuring press lt analysis gt key The screen displays spectrum graphics Amplitudes at cursor frequency 0 FREQ Hz CURSOR CURYVE FUNCTION KEY QUIT t MENU Enter DO MENU There are two amplitude spectrums real line is the amplitude spectrum of the just measured signal broken line is the amplitude spectrum of the stored signal on the same point in the middle At the top right corner of the screen there are three submenus VALU PEAK and WAVE At the bottom there are two notes After measurement you can see two rows of spectrum only when you have not changed the measuring point Otherwise when go back to former measuring point you can only see one row of spectrum It is the spectrum of the just measured data If you have n
5. Enter gt key to measure The screen displays Weight g g And Degree You can input the weight and degree of the trial mass Speed rpm with lt ft gt lt gt or lt gt lt gt gt key Press lt Enter gt key Phase to affirm Then the screen displays Amplitude uM To Next Step When rotate speed phase and amplitude of vibration are steady press lt Enter gt key Now the measurement of phase and amplitude of vibration is finished The screen Revision G 19 of 19 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD displays the correction weight and degree and the influence coefficient Halt machine and unload the trial mass Install the mass according to the result that comes from SENDIG 903 Then start machine again and measure vibration The amplitude of vibration should decrease obviously If the result is dissatisfactory you should do balancing again until gain satisfactory outcome When you do it again you can use the prior obtained influence coefficient NOTE If select Result or Step3 and press lt Enter gt key you can observe the conclusion of the prior balancing If select Step2 and press lt Enter gt key It indicates the measurement of initial value is finished the collector store the result automatically If the influence coefficient is known input it Otherwise affirm the trial mass and input it If the collector is switched of
6. Too Weak is shown please check the sensor and the cable to make sure the sensor and cable linked well Measure it again if everything OK NOTE Before the measurement result appears don t press any key or touch the sensor Otherwise the spectrum will distort 4 USING THE MODE MENU Press lt Mode gt key the following will be Note Book shown speed Measurement Format Memory 4 1 Note Book ee The vibration of machines usually correlates with other parameters For example the pressure of lubricating oil and bearing temperature can directly reflect the condition of the sliding bearing and influence the vibration High temperature of motor coil generally means short circuit or overload and so will influence the vibration As a result it is important to consider the effect of relative parameters such as pressure temperature flux rotate speed etc for the fault diagnosis and comprehensive condition evaluation The function of Note Book is to save these parameters After entering into Mode Menu select Note Book with lt f gt or lt gt key then press lt Enter gt key The screen displays the following move the cursor to the item that you went to modifying with lt t gt or lt gt key then adjust it with lt gt or lt gt key 1 Type Select parameter from the followings Temperature Pressure Load or Current Other Parameters 2 Old New They are seven digit floating point numbers whi
7. Vel Move the cursor to the Trig Mode with lt f gt or Trig Hode Pree Shot lt gt key then adjust it with lt gt or lt gt key Freq Range AUTO Hz Sens eale 5 00 NOTE Normally we select Free Shot Otherwise AlarmScale 3 00 the collector will wait for triggering signal and it will not collect data without the signal K 31 E To Change E tIE J To Bonne wait to be triggered at all times The method of operation is as followings 3 5 How to set up the Freq Range Freq Range indicates the frequency span of spectrum analysis It has eight options including AUTO 100 200 500 1000 2000 5000 and 10000 Hz When AUTO is selected the frequency range of each parameter will be ENVE 1000 Hz ACC 10000 Hz VEL 1000 Hz DIS 500 Hz Additionally the other seven frequency ranges can also be selected It is very important to define the frequency range because different machines have different rotate speeds So good data can be gained only if correct Freq Range is selected The method of modifying the Freq Range fsENDIG 903 9 move the cursor to the Trig Mode with lt f gt or lt gt Wae POUNTHIE key then adjust it with lt gt or lt gt key Route i Ingut iode Sens lor Volt 3 6 How to set up the Sens Scale alate Sods Vol Trig tode Free Shot Freq Range AUTO Hs Generally speaking different sensors have different Sane Scale 5 00 sensor scales Before operatin
8. as zero phases According to custom and international tradition SENDIG 903 takes the direction which is contrary to the direction of circumrotate as the plus direction As following the direchen of crcumretate a j Te F Fiha plus angle k1 1 7 reflecting 1 paper 7 4 2 Select parameter and parameter s dimension The parameter of vibration can selected from Dis Vel Acc and Vol In turn the dimension of the influence coefficient is um g mms g sms je Vie Because different parameter will influence the precision of measure you must select the measurement parameter according to the range of rotate speed Rotation speed rpm 0 10000 gt 10000 Balancing parameter Dis or Vel Vel or Acc 7 4 3 Confirm the weight of the trial mass If trial masses are too light the vibration will hardly change so no accurate correction mass can be calculated If trial masses too heavy the vibration will be exacerbate even damage the machine There are two methods to select the trial mass 1 According experience and the condition of same style machine to select trial mass 2 Calculate depending on formula Firstly gain the approximate grade of balance precision according to ISO1940 Then the trial mass m can be estimated by Revision G 25 of 25 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD 30000xMxG m ______ __ x 5 10 g uxXn xr where M
9. calculate imbalance mass and location This instrument was designed to be user friendly allowing the majority of users to operate the unit even without reading the User s Manual The unit contains one keypad and one LCD The keypad has ten keys lt Measure gt lt Mode gt lt Analyses gt lt Enter gt lt On gt lt Off gt four cursor keys lt t gt lt gt lt gt lt gt Users can do all operation with these keys The SENDIG 903 operates in two different triggering modes the Free Shot Mode and the Ext Trig Mode In the Free Shot Mode the unit continuously monitors its inputs at once In the Ext Trig Mode measurement is triggered by a TTL impulse in the Trigger RPM socket The LCD asks the operator for input and also displays the graphs and analytical results when required All of this and more make the SENDIG 903 one of fieldwork instruments essential for machinery condition monitoring and fault diagnosis 2 BASIC OPERATION AND SET UP 2 1 General The SENDIG 903 is a user friendly instrument capable of recording vibration information accurately In the Free Shot mode you can measure ENVE ACC VEL and DIS The sensor connected in the Accelerometer socket or VOL The sensor connected in the Voltage socket and display new measured and old data comparatively Then the unit displays the conclusion according to the parameters set in the AlmWv Mode In the Ext Trig mode the uni
10. kg the weight of rotor G mm s the grade of balance precision n rpm maximal rotate speed of the balanced machine r mm the locating radius of trial mass m g the weight of trial mass 7 4 4 Confirm the angle According to the vector graph analysis when the phase difference between the measured vibration with trial mass and without trial mass is too small the calculation error of influence coefficient and correction mass will become large So if you find the phase difference less than 25 you need to increase the weight of the trial mass or change its angle and to measure again To decide whether the measure result is useful you can refer to the table as below eee A V lt 25 A V gt 25 Increase trial mass weight Change trial mass angle AQ gt 25 Results is useful Results is useful Where A is the phase difference between vibration vector with trial mass and without trial mass AV is the difference between amplitudes with trial mass and without trial mass all referred to the base frequency vibration 7 4 5 Radius Each time s trial mass and the correct mass must have the same radius Otherwise you have to adjust the weight of mass according to inverse ratio 8 MAINTENANCE 8 1 PHILOSOPHY The SENDIG 903 has no user serviceable components If the operation of the unit is suspect consult your dealer for advice This section will cover those regular maintenance items that are the responsibility of the us
11. with SENDIG 903 The preparation for 2 planes dynamic balance is just as for 1 plane dynamic balance About the details please refer to section 7 3 3 1 It is necessary because of the Revision G 20 of 20 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD confirm 2 planes balancing need to be done adhibit reflector slice mount photoelectric sensor and vibration sensor start up the machine start up SENDIG 903 s 2 planes balancing procedure measure initial vibration value at two locations respectivel with influence coefficient no influence coefficient halt machine install tial mass on the first plane then start up machine agai input the quantity and angle of the first trial mass to 903 and measure vibration amplitude and phase at two locations respectively input the coefficients halt machine unload the first tial mass and install trial mass on the second plane then start up machine again input the quantity and angle of the second trial mass and measure the amplitude and phase at two locations respectively Output the result of calculated balancing mass and 4 influence coefficients Halt machine unload trial mass and install the calculated balancing mass come Output the result of calculated balancing mass from SENDIG 903 Then start machine and measure vibration The amplitude of vibration should decrease obviously If it is still dissatisfying you can do balancing again Wh
12. Mode is Volt the only parameter is VOL and outcome is as followings Vp peak value of voltage OLD A p Vims root mean square value of voltage Vp p peak to peak value of voltage Vie Vpp When selecting measure parameters you must think over the features of the measured device frequency range of each parameter and its sensibility to different faults and so on The principle of selection is to offer the maximal information and easy to operate Figure 2 Selecting parameters according to frequency characteristic ae ACC imbalance pressure pulse air pocket Main faults no alignment ball bearing impact sliding bearing vibration arising from impeller seal touch Parameter Type of abnormal Examples Displace Problem arising from Vibration of machine tools and displacement or loose revolving axis Velocity Problem arising from vibration Vibration of revolving energy and fatigue machinery Acceleration Problem arising from impact Vibration of disfigurement of friction and etc bearing and gearbox 3 4 How to set up the Trig Mode The Trig Mode includes Free Shot and Ext Trig Default selection is Free Shot When Trig Mode is Ext Trig the unit must have a triggering signal Otherwise the unit will Revision G 9 of 9 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD ESENDIG 05 Hame POINTHN a Route 1 Inputiede Sen or Volt Alm v Hode
13. User s manual of SENDIG 903 Beijing SENDIG Technology LTD BEIJING SENDIG TECHNOLOGY LTD USER S MANUAL For the SENDIG 903 A Portable Microprocessor Based Vibration Data collector On site Balancer Spectrum Analyzer The information provided in this Manual is believed to be reliable However Sendig Technology assumes no responsibility for inaccuracies or omissions Sendig Technology assumes no responsibility for the use of this information and all use of such information shall be entirely at the user s own risk Specifications are subject to change without notice No patent rights or licences to any of the functions described are implied or granted to any third party Sendig Technology does not authorise or warrant any Sendig Technology product for use in life support devices or systems E mail sales sendig com sendigbj yahoo com cn Fax 86 10 82895320 Telephone 86 10 82895321 86 10 82895320 Address International Science and Technology ChuangYe Garden ShangDi Beijing P R China Post code 100085 http www sendig com Revision G 1 of 1 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD THE SENDIG 903 USER S MANUAL The information contained in this document is proprietary No part of this manual may be reproduced or transmitted in any form or by any means without the permission of SENDIG Technology LTD Copyright 2001 by SENDIG Technology Ltd All rights reserved Revision G 2 o
14. ch denote old data new data of the parameter You can modify them with lt gt or lt gt key These parameters and forenamed measured value should be stored together to diagnose the faults of machines The process input these parameters firstly then measure the vibration 3 Notes When the collector stores vibration data a fuzzy evaluation of the on site machine can Revision G 12 of 12 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD be stored too so that we can send it to the database of computer as additional information SENDIG 903 offers ten fuzzy condition codes to be selected 0 Ok 1 Not In Use 2 Seal Leaking 3 Much Noise 4 Oil Level Low 5 Very Hot 6 Bear Changed 7 Seal Changed 8 Pre Flow Low 9 Other States The method of modification refers to the notes at the bottom of the screen 4 2 Speed Measurement The principle of speed Measurement adhibit a reflecting slice at the rotation axis The photoelectric sensor transforms the light pulse that comes from the reflecting slice into electrical pulse SENDIG 903 can figure out the speed of the rotation axis based on the electrical pulse The proceed is as follows 1 Connect photoelectric sensor in the trigger socket of SENDIG 903 properly and confirm the radiant end of the red light aiming at the reflector that has been attached to the axis 2 Switch the power on and enter Mode menu Move the cursor to Sp
15. e mass at the same radius and angle according to the result given by SENDIG 903 Then start up machine again and measure vibration The amplitude of vibration should decrease evidently If the result is dissatisfactory you can do dynamic balance again until gain satisfactory outcome If you do it again you can use the prior influence coefficient NOTE Revision G 24 of 24 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD Select Result and press lt Enter gt key you can observe the conclusion of the prior balancing Select Step2 and press lt Enter gt key It indicates the measurement results of the initial vibration the collector store the result automatically If the influence coefficient is known input it Otherwise affirm the trial mass and load the first trial mass If the collector is switched off or the influence coefficient and trial mass are wrong return to the main menu and select Step2 again Step3 means that the measurement of the first trial mass has been finished and the first trial mass was unloaded You may load the second trial mass on plane 2 and then continue If the power is switch off or the second trial mass is wrong return to the main menu and select Step3 again If the influence coefficient is known it can be input directly and the step2 and step3 can be omitted 7 4 Notices during the operation 7 4 1 Direction of phase The definition of phase usually takes the reflecting slice
16. eed Measurement with lt f gt or Hk ek lt gt key and press lt Enter gt key The screen displays If you want to quit from Speed Measurement please l Enter press lt Enter gt key down and keep for a moment The rotate speed and waveform can be saved together to diagnose the faults of machines The process is to measure rotate speed firstly then measure the vibration Note Don t enter into the state of Speed Measurement at random because SENDIG 903 can t exit automatically on this state and electricity consumption is great Stop 4 3 Format Memory Format Memory is a special function for user who is not equipped with computer The process is to enter into the Mode menu WARNING and then enter into the Format Memory screen DATA Will Be Lost YES Key Wait until the RAM checking process finish then press lt Enter gt key to format the memory NO Function Key After Memory formatted SENDIG 903 will CHECKING RAM KENY return automatically to the main menu with factory set parameters No ERROR Found Revision G 13 of 13 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD ti Note When you connect SENDIG 903 with computer please do Format Memory before you setup the parameters by computer 4 4 Save Wave If you want to store the waveform please enter into the Mode menu and then move the cursor to Save Wave and press lt Enter gt key The screen displays
17. en you do it again you can use the calculated influence coefficients Figure 4 Flow chart of rotor s 2 planes balancing repetitive vibration measurement of two positions to make a mark on each measurement point to ensure that each measurement is made in the same place The process is as followings Revision G 21 of 21 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD 1 Switch off power press down the red button at the right hand side of the panel Then switch on 1 Plane Balancing power and the screen will display the main menu as 2 Planes Balancing followings Setting BALANCE 903D 2 Move cursor to Setting item with lt f gt or lt gt key Press lt Enter gt key to confirm At once the screen displays the parameter setting menu of dynamic balance vibration measurement Meas Mode Dis InputMode Sen Sen Scale Move cursor with lt f gt or lt gt key and adjust the parameter with lt gt or lt gt gt key Press other key to come back the main balance menu Move cursor to Meas Mode The measure mode involves ACC Vel and Disp The detailed parameter selecting refers to the figure 2 Move cursor to InputMode The input mode involves Sens and Volt Sens mode is selected generally when adopt accelerometer Adjust the sensor scale Sen Scale unit m s pc according to the accelerometer s certificate Is Machine Rotating 3 Under the main balance menu
18. er 8 2 VERIFYING The transducer and trigger need be checked to ensure validity These items are calibrated at the factory and need not require adjustment However if the unit s calibration is suspect your agent can assist in verifying its proper operation It is recommended that the unit be checked once yearly by qualified personnel 8 3 BATTERY The power of SENDIG 903 is a Ni MH rechargeable battery If the unit is unused long term you need to charge it before use Full charge needs five hours at least The unit can be used for 8 hours of continuous operation with full charged battery Revision G 26 of 26 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD The AC adapter provided is for battery charge To do this the adapter should be plugged into the serial charge socket which is at the right side of the instrument The battery requires no maintenance but charging and it is not considered a user serviceable component of the unit Any attempt to open the unit is strongly discouraged and may invalidate the warranty The internal battery has a very large short circuit current capacity Extreme caution should be exercised when working in its proximity Disconnect the battery before servicing the unit When replacing the battery it is recommended that it be purchased from SENDIG to ensure original equipment quality If any problem with the battery appears to exist contact SENDIG for advice immediately
19. f 2 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD CONTENTS 1 INTRODUCTION 2 BASIC OPERATION AND SET UP 2 1 General 2 2 Setting up the sendig 903 3 USING THE MEASURE MENU 3 1 How to set up the measure point name 3 2 How to set up the Input Mode 3 3 How to set up the AlmWv Mode 3 4 How to set up the Trig Mode 3 5 How to set up the Freq Range 3 6 How to set up the Sens Scale 3 7 How to set up the Alarm scale 3 8 Measuring 4 USING THE MODE MENU 4 1 Note Book 4 2 Speed Measurement 4 3 Format Memory 4 4 Save Wave 5 USING THE ANALYSE MENU 6 SPECIAL NOTICES 6 1 Sympathetic vibration demodulation analysis 6 2 Measure vibration with vortex displacement sensor or inductance velocity transducer 6 3 Data store 6 4 Communicate with computer 7 USING DYNAMIC BALANCER 7 1 Introduction Revision G 3 of 3 12 12 13 13 14 14 15 15 15 15 16 16 16 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD 7 2 1 plane balancing 16 7 3 2 planes balancing 20 7 4 Notices during the operation 25 8 MAINTENANCE 26 8 1 PHILOSOPHY 26 8 2 VERIFYING 26 8 3 BATTERY 26 8 4 CLEANLINESS 27 9 SPECIFICATION 27 10 INDEX 28 Revision G 4 of 4 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD 1 INTRODUCTION Accelerometer EX td F O Voltage Trigger RPM r 4 LCD Displa py FFT Analyzer RS232C Mach
20. f or the influence coefficient and trial mass are wrong return to the selecting menu and select Step2 again 7 3 2 planes balancing The process of rotor s 2 plane field balancing is in figure 4 in the next page 7 3 1 Principle of 2 planes dynamic balance of rotor Almost all the balance of single span rotor can be achieved through the method of 2 planes dynamic balance As a matter of fact 1 plane dynamic balance is only one special example of 2 planes dynamic balance When doing 2 planes dynamic balance two planes of adding mass and two points of vibration measure are needed SENDIG 903 s 2 planes dynamic balance also adopts the method of influence coefficient But the difference from 1 plane dynamic balance is that the vibration of two measurement points should be measured when adding trial mass to one of the planes That s so called interact effect 2 planes dynamic balance has four influence coefficients The steps to do 2 planes dynamic balance is as followings 1 Measure initial value of two measurement points Load trial mass to first plane then measure the vibration of two measurement points respectively 2 Load trial mass to second plane and then measure the vibration of two measurement points respectively 3 Gain conclusion of the correction mass Of course if the influence coefficient is known it can be input directly and the above step 2 can be omitted 7 3 2 Process of 2 planes dynamic balance
21. g SENDIG 903 you AlareSeale 3 00 must make sure the sensibility of the collector according with the scale of the sensor 0 01 100 E J E To Change Otherwise the measuring is not precise E tdi LY To Move The method of modifying is Move the cursor to the Sens Scale with lt t gt or lt gt key then adjust it with lt lt gt or lt gt gt key LSENDIG 05 9 Name POUNTHH Route 3 7 How to set up the Alarm scale Input Woda Sena or Volt Alarm scale 0 01 999 is the coefficient between the alefy Hode Vel alarm value and reference value of vibration Trig Mode Free Shot Preg Range AUTO Hs The function of Alarm scale is to alarm when the Sene Scale 5 00 measuring value multiplied by Alarm scale is larger Slammicale 3 00 than the reference value then such conclusion as Signal Too Strong is drawn Refer to the section 3 8 E 1 E To Change ETJE IJ To Hore The method of modifying is Move the cursor to the Revision G 10 of 10 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD KSENDIG 4 J Alarm Scale with lt f gt or lt gt key then adjust it with Mame POUNTHI lt lt gt or lt gt gt key Route 1 Ingut fode Seme ar Yalt ai Alaiv iode Vel To set up reference value of vibration refer to the mison manual of PC software Trig Walea Pree Shot Prey Amge AUTO lH Hame male 5 00 AlargScale 3 00 3 8 Measuring
22. h parameter for FFT spectrum analysis AlarmScale 3 00 The method of setting up AlmWv Mode is to move the cursor to the AlmWv Mode with lt f gt or lt gt key and then adjust it with lt gt or lt gt key E E To Change E t E LJ To Bove Revision G 8 of 8 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD The meaning of each parameter is as followings DIS Displace Peak to peak value the maximum vibrating distance between the positive amplitude and the negative one of the vibration DIS is usually used on the occasion where the gap of the machine parts is critical Its unit is um 1 1000 mm VEL Velocity The root mean square rms of velocity often written as Vims It is usually used as the evaluation of machine vibrating Its unit is mm s ACC Acceleration The peak value of acceleration often written as Ap SENDIG 903 adopts equivalent peak value which equals to the value of root mean square acceleration Ams multiplying 1 414 Its unit is m s ENVE Acceleration Envelope The RMS of the envelope signal of high frequency acceleration after filtering off low frequency lt 1kHz Its unit is m s VOL Voltage VOL adopted when using other sensors that output voltage signals Its unit is V NOTE AlmWv Mode is limited by the Input Mode When the Input Mode is Sens there are four parameters to be selected DIS VEL ACC and ENVE But When the Input
23. ijing SENDIG Technology LTD Plane 1 To Point 2 Now input influence coefficient of plane 1 to point 1 Influence Coef Is with lt t gt or lt gt or lt gt or lt gt key Then press xx mm s g 0 lt Enter gt key to confirm and screen displays Key To Next Step Plane 2 To Point 1 Now input influence coefficient of plane 1 to Influence Coef Is point 2 with lt t gt or lt gt o lt lt gt or lt gt key Then xxx sig O press lt Enter gt key and the screen displays Key To next Step Now input influence coefficient of plane 2 to point 1 Plane 2 To Point 2 with lt f gt or lt gt or lt gt or lt gt gt key Then press Influence Coef Is lt Enter gt key and the screen displays ees oe Key To Next Step Input influence coefficient of plane 2 to point 2 with Correction Should Be lt t gt or lt gt or lt gt or lt gt key feo ee When all were input correctly press lt enter gt key to gain i ea Oa the calculated quality and angle of the balancing mass Key To Next Step Halt the machine and install the balancing mass according to the given values If the power is switched off by accident you can switch on again and select Result item to regain the calculation result of balance Set Trial Mass gt PL1 5 If the influence coefficient is unknown you must And Then Input Its select Measure item and the screen will display Weight g A
24. inery Data Collector Battery Measure Analyze Collector Mode Enter E J aa Balancer k o ot sendig 9 3 Figure 1 SENDIG 903 Panel and plugs The SENDIG 903 is a state of the art computerized instrument It is an advanced machinery analyzer specially designed for maintenance and diagnosis of mechanical equipment Integration of the functions of data collector on site balancer and dynamic spectrum analyzer makes it be able to do on site FFT spectrum analysis and waveform display collect full featured data for predictive maintenance measure vibration displacement velocity acceleration and acceleration envelope with a single transducer It has an optional balancing module for 1 plane and 2 planes rotor balancing with influence coefficient method and it is also featured with spectrum comparison and trend analysis various spectrum analysis waveform analysis time domain diagnosis bearing and gear box diagnosis with the PC software support It has three main functions Analyze and diagnose the faults of mechanical devices rotor bearing gearbox induction motor etc on the spot Collect and store information that corresponds to conditions of device This information can be sent to computer to establish the maintenance database Revision G 5 of 5 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD and make elaborate analyses and trend analyses Measure vibration phases and
25. input mode The input modes have Sens and Volt Adjust the sensor scale Sen Scale unit m s pC according to the accelerometer s certificate Is Machine Rotating 3 In the main balancing menu move to 1 Plane Balancing with lt t gt or lt gt key and press lt Enter gt to RUN Result enter into l plane balancing menu The screen Step2 Step3 displays Run0 Planel Pointl Move cursor to RUN Press lt Enter gt key to execute Speed rpm Affirm the rotate speed had achieved the speed at Phase 4 which you want to do balancing Then press lt Enter gt Amplitude M key to measure initial vibration Soon The screen Key To Next Step displays When rotating speed phase and amplitude of vibration Have Influence Coef are steady press lt Enter gt key for a moment and then Yes amp Input Measure the initial value should be displayed Influence Coef Is 1 If influence coefficient is known select Yes amp Input pL M g The screen displays t FAST SLOW lt l NEXT STEP Adjust the influence coefficient with lt t gt lt gt or lt gt lt gt key Then press lt Enter gt key and the correction weight and angle will be displayed Correction Should Be xx g xx Influence Coef Is pM g 2 If influence coefficient is unknown go to Set Trial Mass gt PL1 Measure with lt t gt lt gt or lt gt lt gt key Then And Then Input Its press lt
26. k value of ACC or voltage rms value of VEL Enve or voltage peak to peak value of DIS or voltage The old data will be lost automatically after saving new data because they occupy the same memory space If you want to further analyze and diagnose the vibration of measurement point you can store the waveform of vibration to send it to the computer in future The operation refers to section 4 4 Save Wave 6 4 Communicate with computer It s easy to connect SENDIG 903 with computer When the serial communication cable is connected properly and the power is switched on SENDIG 903 will wait for the computer s command As soon as SENDIG 903 receives the computer s command it will communicate with computer at once Before collecting you can send the parameters that are set up in the computer beforehand to SENDIG 903 through the serial communication cable These parameters include Point Name Input Mode Sensor scale Alarm scale reference spectrum and reference value of displacement velocity acceleration and Envelop Then you can measure collect and compare data with the old one with SENDIG 903 on the spot New data can be sent to the maintenance database or signal analysis software package by serial communication cable Note Before SENDIG 903 receives the computer data please format memory firstly refer to 4 3 Format Memory Otherwise the function of data store could be affected 7 USING DYNAMIC BALANCER 7 1 Intr
27. move cursor to RUN Result 2 Planes Balancing with lt f gt or lt gt key and press lt Enter gt key enter into 2 planes balancing submenu BERPA Steps Screen displays RunO Planel Pointl Move cursor to RUN When the rotating speed Speed rpm had achieved the speed at which you want to do Phase balance press lt Enter gt key to measure initial Amplitude um value of vibration Soon the screen displays Key To Next Step When rotate speed phase and amplitude of vibration are steady press down lt Enter gt key for a moment and then remove the hand Now the measurement of the first measurement point s initial value is finished Then the screen displays Is Machine Rotating RUN Run0 Planel Point2 Move cursor to RUN and press lt Enter gt key to measure the initial vibration value of the second measurement point When rotate speed phase and amplitude of vibration are steady press down lt Enter gt key and remove the hand after a moment Now the measurement of the second measurement point s initial value is finished Have Influence Coef 4 After finish the measurement of initial value the Yes amp Input Measure screen displays Plane 1 To Point 1 Influence Coef Is If influence coefficient is known select Yes amp Input and press lt enter gt key Then the screen displays ak mm s g I Key To Next Step Revision G 22 of 22 06 4 10 User s manual of SENDIG 903 Be
28. ngle Halt machine load the selected trial mass on the plane 1 move the cursor with the lt t gt or lt gt or Is Machine Rotating lt gt or lt gt key and input the actual weight and RUN angle of the trial mass When finished press the RUN1 Planel Pointl lt Enter gt key Then the screen displays When the rotate speed is steady press lt Enter gt key Is Machine Rotating to measure the vibration of the first measurement RUN point with the plane 1 s trial mass When phase and amplitude of vibration are steady then press JRUNI Planel Point2 lt Enter gt key again to store the measurement result Then screen displays Revision G 23 of 23 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD After the sensor of the second measurement point is connected properly press lt Enter gt key to measure the vibration of the second measurement point with the plane 1 s trial mass When rotate speed phase and amplitude of vibration are steady press lt Enter gt key again to store the measurement result Set Trial Mass gt PL2 And Then Input Its Weight g Angle Now the measurement of each measurement point with the plane 1 s trial mass is finished At the same time the screen displays Is Machine Rotating Halt machine and unload the first trial mass Then RUN load the selected trial mass on the plane 2 and input the actual weight and angle of the trial mas
29. nvelope signal caused by bearing fault through high frequency separation technology and sympathetic vibration demodulation method The process is as follows 1 Enter into Measurement menu and move cursor to AlmWv Mode with lt f gt or lt gt key 2 Select parameter Enve with lt gt or lt gt key 3 Press lt Enter gt key to measure 4 Press lt analysis gt key to observe envelope spectrum and envelope waveform If you want to store the envelope waveform refer to section 4 4 6 2 Measure vibration with vortex displacement sensor or inductance velocity transducer The proceed as follows 1 Check that the plug of sensor is properly connected in the Volt socket of SENDIG 903 2 Enter into Measurement menu and move cursor to Input Mode with lt f gt or lt gt key 3 Select parameter Volt with lt gt or lt gt key 4 Press lt Enter gt key to measure 5 Press lt analysis gt key to observe the spectrum and waveform of voltage signal If you want to store waveform refer to section 4 4 6 3 Data store It s automatically to store the characteristic value and spectrum Each time you change the measurement point name SENDIG 903 will automatically check if the former measurement point has new data If it has the new data will be saved including Revision G 15 of 15 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD measurement parameter pea
30. o the section 4 to save waveform B Without setting up collector by computer you should set up the parameters in the measure menu to get proper and reliable data Press the lt On gt key down and keep two seconds The LCD displays the measure menu Refer to the section 2 2 At the bottom of the screen there are two rows of notices called help information that changing with the location of the cursor When the cursor is on the Revision G 7 of 7 ESENDIG 93 Name POINTHH Route l Input Hode Sene or Volt AloWy sewbe Vel Trig Wode Free Shot Preq Range AUTO He Sens Scale D 00 AlarmScale amp 00 To Change 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD last two items the help information is E J E To Adjust Kt f J To Move When the cursor is on the other items the help information is l K E gt To Change 3 1 How to set up the measure point Cty E4 ToMove name point ID Measure point name POINTO 269 Just after formatting the memory the content f display is as followings of display is as followings ESENDIG 9033 Hame PODNTHA Route 1 Input Wode Sens Cor Volt bat te AlgWy Mode Vel Route 1 270 It indicates the sequence of trig tode Free Shot measuring lt f gt lt gt or lt gt lt gt gt Freq Range AUTO Hz The point name can also be inputted from computer There is a space of
31. oduction The most convenient method to eliminate rotor s imbalance is making dynamic balance on the spot So on the base of vibration measurement and signal analysis SENDIG 903 adds the functions of phase measurement and dynamic balance calculation 7 2 1 plane balancing The flow chart of 1 plane balancing can be found in Figure 3 7 2 1 What is 1 plane rotor imbalance Rigid rotor works under the speed far less than its first order critical rotate speed and its deformation can be neglected When the quality of the rigid rotor almost focuses on a disc namely the ratio of its length and its diameter is less than 0 5 we can do 1 plane dynamic balance on it and gain satisfactory result But for the flexible rotor the deformation cannot be neglected So its method of balance differs from rigid rotor However the rotor with single imbalance plane can also be balanced according to the method of 1 plane balance of rigid rotor For above whether the rigid or flexible rotor its quality of imbalance always focuses on one disc so both of them can be balanced according to the method of 1 plane rotor balance In the mineral plant and manufactory such rotating machines are ubiquitous such as pump ventilator etc Revision G 16 of 16 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD need to do 1 plane balancing adhibit reflector slice mount photoelectric sensor and vibration sensor start up SENDIG 903 s 1 plane balance p
32. ot made any measurement at the current point you can only see the reference spectrum come from computer broken line Notes 1 Submenus VALU characteristic values of vibration Revision G 14 of 14 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD PEAK peak value of spectrum WAVE time domain waveform ZOOM 4 times frequency zoom around the cursor Select item with lt t gt or lt gt key Press lt Enter gt key to show 2 Move the cursor with lt gt or lt gt key to observe the spectrum value At the right of screen there are three data items FRQ frequency OLD old data broken line and NEW new data real line After selected WAVE you can observe the 1024 point time domain waveform with lt gt or lt gt key 3 Set up the AlmWv Mode in the Measure menu before measuring 6 SPECIAL NOTICES 6 1 Sympathetic vibration demodulation analysis Vibration arising from disfigurement of ball bearing has a feature of low intensity and high frequency especially at the forepart of fault When the roller is passing fault position impact audio frequency and supersonic vibration will be brought about Furthermore the impact makes bearing ring and accessories produce sympathetic vibration During vibration measurement it is necessary to separate high frequency signals arising from imbalance no alignment and so on from low frequency signals SENDIG 903 can separate out e
33. red button at the right hand side to bottom before pressing lt On gt key 3 If error found during ram checking contact the manufacturer Soon it enters into the measure menu You can then start your operation NOTES 1 If it is the first time to be used or not to be used long term charge the collector battery and format memory before operation Charging should last for six hours at least The method of formatting memory refers to the section 4 2 SENDIG 903 will switch the power off automatically if there is no any operation in about forty seconds If it can t such as measuring rotate speed you can switch the power off by pressing lt Off gt key 3 USING THE MEASURE MENU ESENDIG 903 Name POUNTHHY Route l Input Wede Sens or Yolt J AlmBy Hode Vel Trig Mode FPree Shot Freq Range AUTO He J Sens Scale 5 00 AlarmScale 3 00 E J E To Change Et E LJ To Move The function of the measure menu is to help user observe and modify the measuring parameters It is very important to confirm all the parameters in the menu before using SENDIG 903 to collect data There are two ways to do this A Set up the collector by computer Each parameter saved in the computer parameter database can be transmitted to the collector automatically Then find out the measuring point name press the lt Enter gt key SENDIG 903 can collect and store data automatically NOTE Please refer t
34. ric pulse per turn of the running rotor Not only the rotate speed can be measured but also the vibration signals can be compared with pulse signals So the phase of the rotation frequency vibration signals can be gained During the balancing process the position of the reflecting adhesive paper the position and direction of the photoelectric sensor should keep unchanged 3 Link cables Connect vibration sensor and photoelectric sensor with SENDIG 903 properly 4 Start up the machine and make it run at the due rotate speed of balance 7 2 3 2 Operation BALANCE 903D 1 Plane Balancing 2 Planes Balancing Setting 1 Switch off SENDIG 903 s power press down the red button at the right hand side of the panel 2 Switch on SENDIG 903 s power the screen displays the balancing menu Move cursor to Setting with lt f gt or lt gt key Meas Mode Dis Press lt Enter gt key to enter the parameter setting InputMode Sen sub menu of dynamic balancing Sen Scale oe Move cursor with lt f gt or lt gt key to a parameter and adjust it with lt gt or lt gt key Press any key else to come back to the main Revision G 18 of 18 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD menu Move cursor to Meas Mode and select the measure mode The options include ACC Vel and Disp To select a suitable one refer to the figure 2 Move cursor to InputMode and select the
35. rocedure measure the initial value of vibration with influence coefficients no influence coefficient halt machine install tial mass then start up machine again input the quantity and angle of the trial mass measure the amplitude and phase of vibration get the result of calculated balancing mass and 2 influence coefficients Halt machine unload trial mass and install the calculated balancing mass come from input the influence coefficient get the result of the calculated balancing SENDIG 903 Then start up machine and measure vibration The amplitude of vibration should decrease obviously If it is till dissatisfying you can do balancing again When you do it again you can use the calculated influence coefficients Figure 3 Flow chart of rotor s 1 planes balancing 7 2 2 Principle of 1 plane balancing SENDIG 903 s 1 plane balance adopts the method of influence coefficient which is also called balance method of 1 plane measure phase Just as its name implies it s desirous to do the measurement with the phase of base frequency vibration when measuring the vibration amplitude of rotor The base frequency vibration can be indicated as vector The process of 1 plane balance is as follows Revision G 17 of 17 06 4 10 User s manual of SENDIG 903 Beijing SENDIG Technology LTD 1 Measure and gain the initial base frequency vibration vector AQ under the scheduled rotate speed 2 Load
36. s Then RUN2 Plane2 Pointl press lt Enter gt key The screen displays f When the rotate speed is steady and the sensor of the first measurement point is connected properly E Ei rpm press lt Enter gt key to measure the vibration of the Phase first measurement point with the plane 2 s trial Amplitude mm s mass Then the screen displays lt Key To Next Step Is Machine Rotating When rotate speed phase and amplitude of RUN vibration are steady press lt Enter gt key for a moment to store the measurement result Then the Run2 Plane2 Point2 screen displays After the sensor of the second measurement point is connected properly press lt Enter gt key to measure the vibration of the second measurement point with the plane 2 s trial mass When rotate speed phase and amplitude of vibration are steady press down lt Enter gt key for a moment to store the measurement result Correction should be PLI eee 5 S PL2 a 2 Key To Next Step Now the measurement to every measurement point with the plane 2 s trial mass is finished The screen shows the result ca Now press lt Enter gt key four influence coefficients will be shown in turn mm s g mm s g mm s g mm s g They are respectively the influence coefficient of plane 1 to point 1 plane 1 to point 2 plane 2 to point 1 and plane 2 to point 2 Halt machine unload trial mass and install balanc
37. sixteen character for the input Sens Scale m Cl If you want to change the point name move the AlarmSeale 5 00 cursor to the Name line with lt t gt or lt gt key then find out the specific point name with lt gt or lt gt KE 1 E To Change key EtIE LJ To Move 3 2 How to set up the Input Mode Input Mode includes two modes Sens sensor or Volt Voltage The method of changing is as followings ESENDIG M3 Hame POUNTHH Move the cursor to the Input Mode with lt f gt or Route 1 lt gt key and then change the mode with lt gt or MputMede Sens or Wolt ee Alav ode Vel TrigMote Free Shot Freg Range AUTO Hz Sene Scale 5 00 AleargScale 3 00 We usually use the acceleration transducer so adjust the Input Mode to Sens and link the sensor cables with the Accelerometer socket When you are measuring with voltage signal E E To Change adjust the Input Mode to Voltage with lt gt or ETIE LI To Hoe lt gt gt key link the signal with the Voltage socket and then measure it ESENDIG w3 F NOTE If the Input Mode is wrong collected data Name POINTIN will be incorrect Route 1 Input fode Sens or Volt J Ala v Hode Vel 3 3 How to set up the AlmWv Mode Tri are sq AlmWv Mode decides which parameter to be used Freq Range AUTO Hs J for alarm which parameter s waveform to be saved Sens Scale 5 00 and whic
38. t must have a trigger impulse signal connected in the Trigger RPM socket and the vibration signal is recorded only when the trigger impulse signal appears Different from the Free shot user can get position related information Furthermore you can measure rotate speed and make dynamic balance on the spot when the trigger is a photoelectric sensor In either mode the unit will operate about eight hours after full charged 2 2 Setting up the SENDIG 903 Proceed as follows when using your SENDIG 903 1 Check that the sensor is properly connected in the Accelerometer socket or Voltage socket Usually user uses charge output type acceleration transducer so plugs the cable into the socket marked Accelerometer 2 Check that the trigger or photoelectric sensor is properly connected in the Trigger RPM socket In Ext Trig mode measure rotate speed or make dynamic balance 3 Install and fasten the sensor to the measured object Revision G 6 of 6 06 4 10 User s manual of SENDIG 903 4 Install the trigger or photoelectric sensor correctly if you select the Ext Trig mode 5 Press the lt On gt key down and keep two seconds The LCD will display the following Beijing SENDIG Technology LTD 003 MACHIMERY ANALYZER DATA COLLECTOR BALANCER CHECEING FAM soona Ho error fund Notes 1 Ifthe LCD has no display press the lt Off gt key and try again 2 To make dynamic balance please press the
39. the proper trial mass M on the rotor and then measure vibration vector A01 under the condition of the same rotate speed 3 Calculate the balance mass Q which should be load on the rotor according to the following formula Q M x A0 A001 AO During the balancing all the vibration should be measured under the same rotate speed because of the imbalance force of rotor relates with the rotate speed 7 2 3 Process of 1 plane dynamic balancing 7 2 3 1 Preparation 1 Affirm that machine has fault of imbalance and that it can be eliminated by the method of 1 plane balance Once the machine has heavy vibration we should do frequency analysis with the vibration signals firstly Generally the probability of imbalance is higher So when the vibration signals include high rotation frequency vibration and less harmonic frequency wave meantime without evidence of other faults very possible it is the fault of imbalance 2 Mount sensor Vibration sensor it should be disposed in the horizontal direction or vertical direction of the rotor bearing or on the base frame Because dynamic balance is vector calculus the position and direction of the vibration sensor should keep unchanged in the course of the balancing Photoelectric sensor adhibit a reflecting or unreflecting adhesive paper according to the condition of the rotor s surface to a visible place of the rotor or its axis Photoelectric sensor can give SENDIG 903 1 elect

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