The CA200 Calibration System
Contents
1. Measured voltage on Measured channel Actual sensitivity E e Calculated sensitivity Accelerometer 22 Velocity sensor i of transducer Displacement sensor Temperature status Normal or Overload Imperial or Metric units Open Edit Calibrated Transducer form Fig 21 Calibrated panel 21 CA200 Calibration System User manual In this panel you can specify transducer type select between Metric default or Imperial units and modify Calibrated Transducer data To select type of transducer pick the button to the left of the corresponding text Accele rometer Velocity sensor or Displacement sensor Though the CA200 Calibration System is primarily adapted for calibration of Accelerometers you can also calibrate Velocity and Dis placement sensors with less accuracy To select Units pick the button to the left of Metric Imperial to toggle between them Though the reference transducer 1s an Accelerometer you can calibrate Velocity and Displa cement sensors without replacing it The programme will automatically re calculate all va lues to mm s or in s for Velocity sensors and to um or mils for Displacement sensors If you pick Set you open the Edit Calibrated Transducer form allowing you to change data for the current transducer under test For a description of this form see Edit Calibrated Transducer under2. SB ah i a 1 il 1 m i i VMI AB Sweden Torsgr nd 15 5 60363 Norrk ping Sweden Date den 17 september 2008 CALIBRATION CERTIFICATE CALIBRATED TRANSDUCER Type Tag name Accelerometer Manufacturer Serial No Kistler 2051902 Tag name Sensitivity 159 0 8704B50 97 30 mV g 200 4 Sensitivity 159 0 Hz 97 3 mV 7g at 1 den 17 september 2008 17 13 52 REFERENCE TRANSDUCER Manufacturer Sensitivity Kistler 99 6 mV g Type Calibration Certificate 8704B50 2051903 Serial No Valid until 2051903 2009 11 07 5 Authorized signature 27 CA200 Calibration System User manual 38 CA200 Calibration System User manual Appendix 2 Calibration Certificate for Reference Equipment Reference Transducer V MM SP utf rdat av riksm tplats 01 CALIBRATION CERTIFICATE issued by a Swedish National Laboratory Date Reference Page 2009 05 05 F908797 1 1 2 Handled by department Jonas Pettersson Energy Technology 46 10 516 50 96 jonas pettersson sp se VMI Jan Andersson Torsgr nd 15 603 63 LINK PING Calibration of a standard accelerometer Identification Object Accelerometer Kistler 8704B50 s n 2051899 inv no Object state Upon arrival the object had no visual damage Calibration date 2009 04 27 Measurement methods and procedures The primar
3. 18 VIDEOS ADD 18 E 18 CA200 Calibration System User manual lt 19 19 The RCT LCCC AN ENERO E T TIT 20 The control field below Frequency Reference amp Calibrated panels 2 21 eec Ghesesdssaareeseoseisensaees 27 IDE mm 24 No contact between the Vibrograph Instrument and the Calibration Amplifier 24 rd 24 Vibrograph seems to calculate incorrect 22 Modifying and updating the CA200 Calibration 26 Translate the menus to ne w Iangllage 26 Uperadine the 27 velo 28 Mechanic A o S EET 28 6 E T m 28 Slc M 20 Accumulated uncertainty for the Calibration System 20 EIE COR TEPORE 30 FIO DOS EEE 31 Change correct parameters for the Reference Transducer 31 Enter parameters for the transducer that shall be cali
4. 2 Displacement sensor EEF dB Ol Ol o i Units Scaler AUTO Em 7 Metric Bl Continuous Ae START STOP a 5 0 KHz Set Fig 3 Vibrograph Virtual instrument user interface The Main Menu is located immediately below the banner at the top of the window to the left and holds 3 commands Settings Report and Help Enter data for reference transducer Before the system can be used you must enter data for the reference transducer Pick Set tings to display available sub commands From the sub commands pick Edit Reference Transducer The following pop up form will then appear Edit Reference Transducer Manufacturer It is essential for the accuracy of all Sen le calibrations that correct data 1s specified for the reference transducer Most important is sensitivity 5 the sensitivity which all further calibrations will relate to To maintain the accuracy of the instrument the reference transducer must be calibrated periodically Cancel Fig 4 Edit Reference Transducer form CA200 Calibration System User manual For traceability information about Manufacturer Type Serial No and data about Calibration Certificate for the reference transducer 15 useful and will be included in the Calibration Certificate for the transducers that are tested These parameters though are optional and may be omitted Fi
5. CA200 Calibration System User manual TEST REPORT TEST DESCRIPTION DCV DCV DCV DCV DCV DCV DGV ACV ACV ACV ACV ACI ACI ACI ACI OHMS OHMS OHMS OHMS OHMS OHMS 1V on 1V Range 1V on 1 Range 10V on 10V Range 1 on 10V Range 10V on 10V Range 100V on 100V Range 1000V on 1000V Range 01 IKHA on 1V Range lV IKHZ on 1V Range lV 50KHZ on 1 Range 1 1KHZ on 1V Range IV 50KHZ on 1V Range 10V 10HZ on 10V Range 10V 1KHZ on 10V Range lov 20KHZ on 10V Range 10 50KHZ on 10V Range 10 100KHZ2 on 10V Range 10V 300KHZ on 10V Range 100V 1KHZ 100V Range 100V 50KHZ on 100V Range 700V IKHZ on 750V Range 700V 50KHZ on 750V Range 1000 5 on 1000HMS Range IKOHMS on 1KOHMS Range lOKOHMS on 10KOHMS Range lOOKOHMS on 100KOHMS Range IMOHMS on 1MOHMS Range LOMOHMS on 10MOHMS Range lOMA on 10MA Range 100 on 100MA Range 1 on 1A Range 2A on 3A Range LOMA 1KHZ on 1A Range LOOMA 1KHZ on Range lA 14 on 1A Range 1 2 on Range FREQ IV 10KHZ on 1V Range READING 1000003 1 0000004 10 000007 0999981 F 100 00002 999 999332 0100008 1000010 1000246 49299979 1 0001188 l0 000121 9 9997654 10 001451 10 003605 10 011370 10 111578 100 00045 99 989557 700 00664 700 07374 100 00000 1000 0001 10000 004 100000 02 1000002 6 2999993 5 9100901 1000002 1 0000010 1 9999585 0100104 1000498 l1 0001219 2 9994956 99
6. Then a window in standard Microsoft style appears allowing you to specify a picture file holding the company logo image The file may be any pictures file format and the image may be of an arbitrary size It is recommended though that the height to width ratio 1s 1 2 5 to avoid distortion as the image is stretched to fit in the reserved field Optimum picture size is 2770 x 108 pixels Plot a Sensitivity Graph The commands required to plot a Sensitivity Graph are located in the Plot panel Before star ting a plot scan you should specify a reference frequency for the sensitivity calculations This 1s done in the field Ref freq The graph can be plotted either between 10 and 2000 Hz or between 20 and 1000 Hz Unless you really need to plot the sensitivity at 10 2000 Hz it is recommended that you select the interval 20 1000 Hz This is because that the accuracy is lower at 10 and 2000 Hz than inside the interval 20 1000 Hz Also there is a large amount of power required to achieve sufficiently large vibrations at 10 Hz which may cause the amplifier to overheat and shut down 10 2000 Hz m oW Fig 28 Select interval You should also select if the scan shall be performed with acceleration at approximately 0 5 or I g by pressing the selection button shown in fig 29 m 4 evel 0 Fig 29 Button for selection between 0 5 and 1 g 33 CA200 Calibration System User manual Th
7. The Frequency panel When the Vibrograph instrument is started the Frequency Panel is selected by default In this panel you can use the arrow buttons to adjust the vibration frequency between and 2 KHz in 1 10 and 100 Hz steps Though you are allowed to manually set the frequency all the way down to 0 Hz due to limitations the amplifier and the shaker the level of accuracy cannot be guaranteed below 10 Hz There is also a direct to frequency lt n gt Hz button which immediately sets the frequency to n The frequency n is the specified Ref Freq in the Plot panel In Europe 159 Hz 2 T f 1000 rad s is common while in US often 100 Hz is used Note that the panel must be selected the tab or heading must be blue before you can use any of the commands Adjust frequency up or down in 100 Hz step Adjust frequency up or down in 10 Hz step Adjust frequency up or down in I Hz step Quick choice button direct to n Hz Here n 159 Hz Select frequency range Fig 17 Frequency panel 19 CA200 Calibration System User manual At the bottom of the panel you have a two choice button it can either be set to Continuous allowing you to test transducers at frequencies up to 2 KHz or to 5 0 KHz to test transducers at one single higher frequency 5 KHz When you test a transducer at 5 KHz you may disp lay or store a Calibration Certificate using the commands Preview short
8. Vibration 1 Reference channel Input for reference Accelerometer Always max 1500 mV RMS provides 2 mA DC to transducer Suitable for Accelerometers Velocity and Vibration 2 Measured channel max 1500 mV RMS Displacement sensors When Accelerometer is used 2 mA DC is supplied OUTPUTS Mini USB Connector External power to transducers 24 V regulated max 85 mA Buffered Output 1 amp 2 Buffered outputs that allow access to trans ducer signals Audio SIGNAL OUT Audio contact providing AC signal from amplifier to shaker Continuous 1 2000 Hz single frequency 5 kHz Amplitude cont rolled by Vibrograph Virtual Interface MEASUREMENT RANGE Ranges Continuous in 1 Hz step 1 2000 Hz 1 point measurements 5 kHz Gain From 0 25 to 128x amplification for both channels auto ranging ACCURACY Highest Accuracy 1 6 100 mV for point calibration between 100 and 200 Hz with reference transducer calibrated using laser interfero metry 2 4 96 100 mV for Graph 20 1000 Hz with reference transducer calibrated at V MI Green LED PC SOFTWARE Vibrograph software running under Windows 98 ME NT4 2000 2003 XP and Vista or later operating system POWER HXDXW Weight Calibrated Transducer weight CA200 Calibration System User manual 36 CA200 Calibration System User manual Appendices Appendix 1 Calibration Certificate example
9. or by picking the Set button in the Calibrated Panel To calculate and produce a graph pick the START STOP button You can also at any time abort the scan by picking the same button If anything abnormal like a communication error or an overheating condition occurs during a scan the scan 1s aborted and the instrument immediately shuts down as a precaution When a Sensitivity Graph has been calculated the result can be viewed on screen or stored in a file Use Preview to display the Calibration Certificate with the Sensitivity Graph included on screen To store it on disk use Save Before the Calibration Certificate 1s displayed or stored the Report notes form appears This allows you to add some short notes which will be written immediately below the data for the Reference Transducer The file will be stored in the Report Directory located under the application path by default C Program Files Vibrograph Report The file name will be SN Serial no gt rtf where Serial no is the serial number specified in the Edit Calibrated Transducer form The Calibration Certificate is stored in an RTF Rich Text Format file and can be viewed modified using any text editor for example Microsoft Word or WordPad The Exit button closes the Vibrograph programme 23 CA200 Calibration System User manual Troubleshooting No contact between the Vibrograph Instrument and the Calibration Amplifier When
10. to the shaker during shutdown During long term use this will cause un necessary wear on the shaker Vibration measurement and balancing using transducers calibrated by the CA200 Calibration System may involve measurements on rotating machines Always keep a safe distance to rota ting parts and secure transducers and transducer cables from rotating parts Though VMI has taken great care to ensure the accuracy of the measurement process determining the transducers sensitivity errors may always occur VMI AB cannot accept responsibility for any accidents involving people and machines when transducers calibrated with the CA200 Calibration System is used VMI AB and our authorized dealers will take no responsibility for damages on machines and plants as the result of the use of transducers calibrated using the CA200 Calibration System Warranty VMI AB warrants the products to be free from defects in material and workmanship under normal use and service within two years from the date of purchase and which from our examination shall disclose to our reasonable satisfaction to be defective Warranty claimed products shall be returned prepaid to VMI AB for service We reserve the right to repair or to replace defective products Always try to explain the nature of any service problem at best by fax e mail or letter Check first all natural problems like fuses broken cables etc When returning the product be sure to indicate that the
11. Settings sub commands The Plot panel Before using the commands in the Plot Panel you must first click on the Plot tab the heading at the top of the panel to select the panel When the heading is blue the panel is selected Begin freg 2 Lower amp upper limits for graph Selectable ranges End Freq z 10 2000 Hz or 20 1000 Hz for accelerometers Ret Freq a Reference frequency for Sensitivity Calculation m 10 2000 Hz Select range for plot 20 1000 Hz recommended m evel 0 59 Amplitude of the vibration during scan n Presentation of graph in percent or dB Scale AUTO 4 Scale in Sensitivity graph AUTO or FIXED Serial number for Calibrated Transducer Start Stop scan View or store Calibration Certificate Exit from programme Fig 22 Plot panel In this panel you can specify the Reference Frequency for Sensitivity Calculation in the field to the right of the text Ref freq Any value between 100 and 300 Hz can be specified though it is recommended that you enter the frequency used as calibration frequency in the transdu cers Calibration Certificate often 159 Hz This value will also appear in the Direct to fre quency box in the Frequency panel 22 CA200 Calibration System User manual The lower and upper limits for the graph cannot be changed separately instead you can se lect between differ
12. Vibrograph application if it is currently running Start the Loader application from the Windows Start gt Programs gt Vibrograph menu Make sure that the CA200 Calibration Amplifier is powered on and connected to the PC via the USB connector and close the Vibrograph application if it is currently running The Loader Window is then displayed The binary file with firmware for the Calibrator with the highest version number is displayed in the field Binary file to load To update the firm ware proceed as follows amp Loader for 200 Calibration Amplifier COM10 Binary file to load C Program Files ibrograhs BIN C4200 750 bin Browse Software Found 200 SOFTWARE W 1 50 Press Load button to continue Connect COM Load Abort E sit Fig 25 Loader window Use the COM button to select the correct serial communications port When the programme has established contact with the Calibrator the version number of the currently installed firmware is displayed in the field Software found Use the Browse button to find the latest image file Note that there may be more than one image file present in the BIN directory Press Connect button to establish connection between PC and the amplifier and then proceed by pressing the Load button The upgrading then starts and complete automatically When the process 1s completed but not before close the Loader by picking Exit Do
13. a thorough description of the pop up form that is displayed by this command If you need to replace the reference transducer you must use this command to enter para meters for the new transducer 14 CA200 Calibration System User manual Edit Calibrated Transducer Each time you want to calibrate a new transducer you must enter some data about it using this command When the command is selected the following form is displayed Edit Calibrated Transducer Manufacturer Code Code should be the type code for the transducer Serial that is being calibrated Serial No its serial num ber Both these parameters should be available in X Ka sed halve the manufacturers documentation Fig 11 Edit Calibrated Transducer form It is recommended that you enter data in all fields especially Manufacturer Code and Serial number as the text will appear in the Calibration Certificate If any field is left blank in the form the corresponding field will be blank in the Certificate Set plot ranges Using this command you can specify a fixed scale in the sensitivity graph The default and recommended value is Auto which allows the programme to automatically select the best fit scale The graph then starts with the interval set to 596 which is kept until a value falls with out this limit When a calculated value falls without the limits the graph is re scaled to one of the intervals 10 2
14. transducer The Calibration System works by comparison That is for Accelerometers the program cal culates a value for the current acceleration based on the reference transducers sensitivity 11 CA200 Calibration System User manual Then it calculates the sensitivity of the tested transducer in mV g by dividing its output vol tage with the calculated acceleration For other types of sensors the program will still based on the reference transducers known sensitivity calculate current velocity in mm s or displacement in um instead of accelera tion Starting the Vibrograph instrument To start the Vibrograph instrument do as follows Start the CA200 Calibration Amplifier Switch Power ON using the power switch at the back of the instrument Connect the CA200 Calibration Amplifier to the PC using the USB connection cable and to the shaker using the Audio 3 pin connector Activate the Vibrograph virtual instrument by picking Vibrograph in the Windows Start gt Programs gt Vibrograph menu Press the ON OFF button at the bottom left on the Vibrograph interface ON OFF button Fig 8 ON OFF button When the Vibrograph instrument is switched ON it attempts to communicate with the Calibration Amplifier If everything goes well the ON button will glow yellow and the system 1 ready for use If the following message appears communication couldn t be established If this occu
15. 0 50 up to 3100096 5 00 4 Sensitvity 156 0 Hz 100 1 at 1 den 13 mars 2009 11 59 45 200 300 500 1 000 Fig 12 Sensitivity graph Scale 5 By picking the command Set plot ranges you display the Scale selection form shown in fig 13 15 CA200 Calibration System User manual Scale selection FI Automatic Manual selection Cancel Fig 13 Scale selection form If you change Scale selection from Automatic to Fixed you can pick the field with the num ber 5 0 to display a list of selectable interval The selected interval will then be used for the calculated graph and any part of the graph that falls without this interval 1s truncated Set reports folder By default Calibration Certificates are stored in the directory Report under the Vibrograph system directory Normally C Program Vibrograh Report You can specify another folder for storing the Calibration Certificates using the command Set reports folder which is found under Settings in the Main Menu The form shown in fig 14 is then displayed Ez Reports Select disk a DATA This command opens a navigator window in function similar with the standard Windows navigator but with one difference You can only select between already existing folders not create a new one Select falder To select another disk than the current pick the top field below Select disk Select directory in th
16. 1 m 7 Enter data Tor reference EEN GLED oin es NERE 7 Customize Calibration Certificate 9 Specify reporis Tolder OpUOna 9 Connect Calibration Amplifier to 10 tie A200 Calibration SystENi 69100 4554650203 11 Calibrating standard transducers using the Vibrograph interface 11 Cit Dia ROR SEE 11 Starting the Vibrograph amp instrument sse enne eene enne nnns 12 Shutting down the Calibration 13 Menu structure in the VibrographQ interface eene 14 14 Subsc OMIA OS 14 OMA 14 Edit Reference GUC 14 Edit Cal brite ET ans Obss disent Es 15 DEL DIOETAHD OS eee 15 SE 9 16 C 16 FRC DOPE B SC O S AEE 17 Im EET 17 gu m Y 17 PGR SSN RR Eo RTT 17 17 Help ANOS
17. 1 visible ESO Save short Preview ON OFF report short report Fig 20 Controls and commands below Frequency Reference and Calibrated panels The ON OFF button is used to turn the CA200 amplifier ON or OFF The button is a toggle so if the amplifier 15 OFF you turn it ON etc When the button is Yellow it is ON when it is Grey it is OFF The Save short report button stores a Calibration Certificate with the currently selected frequen cy as Calibration Frequency on disk For best accuracy first set the amplitude to preferred level then wait at least 15 5 to allow the measurements to stabilise before activating the command The Preview short report button displays a Calibration Certificate with the currently selected frequency as Calibration frequency without scanning and calculating an Sensitivity graph on the screen The STOP button is an emergency stop which immediately sets the signal amplitude to 0 The 24V button switches the 24V power supply output on the front panel of the CA200 Ca libration Amplifier ON or OFF This output provides a 24V DC power source galvanic isolated from the rest of the contents of the CA200 to transducers that requires an external power source The Calibrated panel Before using the commands in the Calibrated Panel you must first click on the Calibrated tab the heading at the top to select the panel Calibrated 4 When the heading is blue this panel is selected
18. 5 C Humidity 20 to 80 RH Procedure VM NEW ALF 206166095786 This certifies that the above product was calibrated in compliance with a quality system registered to ISO 9001 2000 using applicable Agilent Technologies procedures As Received Factory tested No incoming data available As Shipped Conditions At the completion of the calibration measured values were IN SPECIFICATION at the points tested These calibration procedures and test points are those recommended in a procedure developed by Agilent Remarks or special requirements Traceability Information Traceability is to national standards administered by the U S NIST NRC Canada Euromet members NPL PTB BNM etc or other recognized standards laboratories Some measurements are traceable to natural physical constants consensus standards or ratio type measurements Supporting documentation relative to traceability is available for review by appointment This report shall not be reproduced except in full without prior written approval of the calibration facility Calibration Equipment Used Date Used Date equipment used in this Calibration Model Number Model Description Trace Number Date Used Cal Due Date 3458A Multimeter US28028561 06 FEB 2009 27 2010 Fluke 5700A Calibrator 9315521 06 FEB 2009 26 2010 Fluke 5725 Amplifier 7930046 06 FEB 2009 26 JAN 2010 Print Date 10 FEB 2009 Quality Manager cert form rev d T Page 1 of 2 41
19. 989 8953 ERROR 0 0 0 0 0 0003 0 0 0000 00015 00195 0 0 0 0 0 0 0 0 0 D 0 0 1137 1 0 0 0 0 0 0 0000 0000 00015 00805 00105 02465 00025 01 19 0012 0023 0145 03615 11685 00055 01045 00095 01055 00005 00005 00005 0 0 0 0 0 0 0 1040 0 0122 0 0 00005 00035 00015 00105 00025 00015 00215 04985 01685 00005 1 YEAR SPEC 00854 0047 0040 0535 0040 0051 0055 4600 1000 1700 09005 1700 3800 09005 0900 1700 6800 5000 0900 1700 09215 1 7365 0140 0110 0110 0110 0110 0410 07005 0550 4 1004 00 4 100 5000 14005 21005 01 00 1 Tex P gt gt 1 Cc 0H O GO ovo O O CC O O 0G OG O O O O O Page 2 of 2 42
20. Auto run function the installation program should start automatically If this does not happen open My Computer and double click on the CD ROM icon Double click on the Setup exe file to start the installation and then follow the instructions displayed on the screen Downloaded software If you have downloaded the software in digital form you may have either a compressed file with extension zip or the installer itself with extension msi If you have the compressed file zip you must use WinZip or WinRAR or any other prog ram that recognizes this file format to un compress the contents of this file After this you will get access to the installation program The installer 1 a file with extension msi so when you can find this file in your PC you start the installation procedure by double clicking on the file name Then follow the instructions displayed on the screen CA200 Calibration System User manual Set up the Vibrograph Virtual instrument When the Vibrograph 9 software 1s started for the first time there are some settings that must be specified before the instrument is used These settings can be accessed via the Main Menu The Main Menu When Vibrograph 15 activated the window shown in fig 3 will appear 4 Vibrograph Port COM10 Begin Freq Hz 1000 Actual sensitivity End freq 1000 Hz 0 00 ntm x Accelerometer m 10 2000 Hz il 22i velocity sensor 4 4
21. Examples are varying attenuation in coaxial cables due to bending angles and mounting attenuation in con tacts and electric interference Each of these factors is in itself small A pessimistic estima tion 1s that they together amount to 1 0 at 100 mV Accumulated uncertainty for the Calibration System The accumulated uncertainty Ua for the calibration system is calculated using the formula where X contribution to accumulated uncertainty from n th factor The evaluation of the uncertainty in the Calibration System 1s based on the document EA 4 02 When possible X 15 calculated as Mean 2 6 from a sample consisting of 20 readings When fewer readings are available a rectangular distribution of the samples 15 assumed Then the value used for X 1s Largest deviation 1 5 29 CA200 Calibration System User manual Random factors that are difficult to measure may have to be estimated Then the value used for X is Estimated value 2 Ua for the Calibration System at approx 100 mV T 20 25 C Relative Humidity lt 60 90 15 y Excl transducer Incl transducer Incl transducer uncertainty calibrated at SP calibrated at VMI l point calibration bet 20 1000 Hz 10 2000 Hz Reference equipment During test and calibration of the CA200 Calibration System the following equipment is used uipment Manufacturer Type S N Calibration Certificate Reference Acceler
22. VMI AB Torsgr nd 15 603 63 Norrk ping i Tel 011 31 16 67 Fax O11 31 16 78 Vibration Measurement Instruments www vmiab com The CA200 Calibration System 21 Q lt Measured VM www vmiab com 4 Vibrograph Port 10 Settings Report Help Begin Freq Hz End Freq 1000 Hz Ref Freq Hz 10 2000 Hz m u m ud Level 0 54 FH dB m ui Scale AUTO User Manual CA200 Calibration System User manual Table of contents PVT C E 1 AOS E TU 1 Yoh cect 1 s ose ERE utor PERO me 2 Dec Ilaradmon 2 Te CA DOO Cali ravi SUC M 3 liy E e AKER 3 Delum up TOSS DOT eoe 3 Prepare the reference transducer and fixture sese 4 Connect transducers to Calibration Amplifier 4 Install Vibrograph Virtual instrument software in 6 Find the installation program iuc ee serre uec naar rit seere sneen odd Scu ear 6 gie CRON 6 Downloaded so Na le 6 Set up the Vibrograph Virtual 1 7 gt
23. brated 3l l point calibration bo os pin Ee E Eme Uoc iaa DE 31 RHEINE DOT 32 Store Calibration COLUM CALS 32 Change company logo or other information in the Calibration Certificate 33 SCS LVL ER 33 Change Reference Frequency before plotting a Sensitivity Graph 34 Change Frequency on the Quick choice button in Frequency panel 34 WCNC Al SDECITICAHTOHS 33 APD AO e NE EET D 37 Appendix 1 Calibration Certificate example eese 37 Appendix 2 Calibration Certificate for Reference Equipment seeeeesssssss 39 39 4 11 CA200 Calibration System User manual Handling security Warning Cooling Fin may be hot Though protection circuit prevents amplifier from reaching temperatures above 70 it is recommended that you avoid touching the cooling fin while the CA200 unit is being used Safety precautions Do not turn the CA200 Calibration Amplifier off while the Vibrograph 9 Virtual Interface 1s sending a signal to the shaker First set the vibration amplitude to 0 otherwise a pulse is sent
24. command does not store the current certificate on disk afterwards Add notes to report Fig 15 Add notes form Any text added here will be written in the Calibration Certificate under the text NOTE at the bottom of the document If you pick the Yes button without entering any text the area below NOTE will be blank while if you pick No no NOTE field will appear 17 CA200 Calibration System User manual Help sub commands Help Vibrograph This command invokes the on line help for Vibrograph About This command displays a form showing the current version number and serial number for the Vibrograph software and the CA200 Firmware YIBROGRAPH software Ver 2 4 for CA200 Calibration Amplifier Firmware version 1 50 Serial No 9081 YMI SWEDEN Fig 16 About form 18 CA200 Calibration System User manual The functional panels The Vibrograph interface has the following functional panels e Frequency Specifies the frequency the output from the amplifier e Reference Specifies the output volume from the amplifier measured by the reference transducer e Calibrated Specifies and displays data from the transducer that is being calibrated e Plot Produces Sensitivity Calibration Frequency Graph Below the Frequency and Reference panels there is a Control field with some functions that can be accessed immediately at any time except during plot of a Sensitivity graph
25. e Vibrograph Virtual instrument consist of a Main Menu at the top of the window and a number of panels related to the operation you want to perform The main menu The main menu holds 3 commands Settings Report and Help Under Settings you find com mands to set up communication parameters parameters for the transducers scale for graphs folder to store reports in and Exit Under Report you find commands used to select printer and customize the Calibration Certificates while Help provides on line help Settings sub commands Communication Using Communication you can specify new communication port COMI COM etc if you have some problem with communication between the instrument and PC When you pick the command a pop up form is displayed In the field to the right of Serial port you can see the currently selected com Sewer munications port Pick this field to disp lay a list of available ports DE Pick the correct port identity from the displayed list Serial port Fig 10 Serial port form When you selected a new port for communication and press OK the Vibrograph interface will shutdown Next time you start it the specified communications port will be used Edit Reference Transducer When you first set up the system you must specify data about the reference transducer See section Enter data for reference transducer under Set up the Vibrograph Virtual instru ment for
26. e currently selected value 1s displayed against a green background Though you can select this level for all types of transducers it is not recommended that you use 0 5 g for Velocity or Displacement sensors The lower acceleration will make the velocity and displacement so small especially at frequencies above 300 Hz that it will have a negative effect on the accu racy of the calculations You can also select if the values in the Sensitivity Graph shall be presented in percent or in dB by pressing the button EZ m dE Fig 30 Button for selection between dB and percent When these parameters have been set to correct values you start the scan by pressing the START STOP button Change Reference Frequency before plotting a Sensitivity Graph The Reference Frequency is specified in the field to the right of the text Ref freq in the Plot panel To change the value pick the field and then enter a new Reference Frequency from the keyboard Ref freq Hz Fig 31 Reference Frequency field currently set to 159 Hz Note that this Reference Frequency also appear on the quick choice button in the Frequency panel Fig 32 Quick choice button Set frequency to 159 Hz immediately Change Frequency on the Quick choice button in Frequency panel See Change Reference Frequency before plotting a Sensitivity Graph above 34 CA200 Calibration System User manual Technical specifications INPUT
27. e field below Select folder x Fig 14 Set reports folder form Exit The command Exit closes the Vibrograph amp interface 16 CA200 Calibration System User manual Report sub commands Header The Header command allows you to enter data which shall be printed on the Calibration Certificate sheet See section Customize Calibration Certificate under Set up the Vibro graph Virtual instrument for a thorough description of the form that is displayed by this command After defining a new header it will be used for all produced Calibration Certificates hereafter Print The command Print composes and displays a Calibration Certificate ready for printing based on the latest performed sensitivity calculation This command first displays the Add notes form see fig 15 This allows you to add com ments under the heading Note at the bottom of the document Then when you close the form the Calibration Certificate 1s displayed on the screen in a Preview type window From this window you can send the document to a printer Printer setup This command displays the standard printer setup form allowing you to select default printer and some other printer related items Report notes This command displays the Add notes form allowing you to edit the report notes This form is identical with the one displayed by the commands Preview Preview short report Save and Save short report but this
28. ent frequency ranges These are 10 2000 Hz or 20 1000 Hz for Accelero meters 40 800 Hz for other types of transducers For best accuracy the interval 20 1000 Hz is recommended for accelerometers A plotted graph may not always cover the entire selected interval If the measured voltage on the Measured channel becomes too low lt 5 mV the plot is aborted This is because the accuracy can no longer be guaranteed and the graph would be meaningless in this case The amplitude of the vibrations during scan can be set to either 0 5 g or 1 g by pressing the Level Ig Level 0 5g button For Velocity and Displacement sensors 1 g is required Other wise the velocity or displacement will become so small except at low frequencies that it will cause the accuracy of the calculations to deteriorate The dB button selects if the Sensitivity Graph shall be presented in or in dB The Scale field only displays information about current plotting mode referring to the scale on the Y axis in the diagram You can change between AUTO and a fixed value FIXED in the Scale selection form displayed by the Reports sub command Set plot ranges The serial number for the transducer that 1s being calibrated displayed in the field below Scale cannot be changed here in the plot panel The serial number is specified in the Edit Calibrated Transducer form which is displayed using either the Reports sub command Edit Calibrated Transducer
29. ered will appear in the Calibration Certificate The form allows you to specify Manufactu rer Code which should be a code specifying type of transducer Serial number for the trans ducer and Tag name If any field is left blank in the form the corresponding field will be blank in the Certificate Perform 1 point calibration There are two versions of the Calibration Certificate a standard version that includes a Sensitivity Graph and a short version which only shows the sensitivity at the calibration frequency When 1 point or single frequency calibration is performed the short version is used To perform 1 point calibration between 1 and 2000 Hz do as follows 1 Select frequency using the UP and DOWN arrows in the Frequency tab 2 Specify signal amplitude using the UP and DOWN arrows in the Reference tab Note that For best accuracy first set the Signal amplitude to the preferred level then wait for at least 15 s to allow the signals to stabilise This is because the algorithm that calculates the sensitivity needs time to collect a sufficient number of readings to calculate an accurate value for the Sensitivity 3 store the Calibration Certificate use the command Save short report at the bottom of the Frequency panel 3 CA200 Calibration System User manual To perform 1 point calibration at 5 kHz do as follows 1 Set frequency to 5 kHz by picking the Continuous 5 0K Hz butt
30. et component is determined using the signal from a transducer as input to both chan nels A number of measurements are performed at selected frequencies using the Hyper terminal programme From these samples Mean value and standard deviation is calculated for the deviation between the two channels The result is included in the calibration protocol for each instrument The accuracy differs between frequencies and voltages These are the limits that all CA200 Instruments must achieve when tested after calibration Frequenc Accuracy at approx 100 mV 1 point single frequency calib ration between 100 and 200 Hz 0 6 20 1000 Hz 0 8 10 2000 Hz 1 2 1 point single frequency calibration 9 5 kHz 1 8 Other The calculations performed by the Vibrograph programme utilize 8 decimals which gives accuracy better than 10 While calculating the accuracy graph at 1 g at 10 Hz Vibrograph can t continuously maintain an acceleration of 1 g This combined with the large displace ment of the vibrating object at this frequency adds an estimated extra uncertainty of 1 0 96 at I0 Hz The selection of measurement ranges controlled by the software has a hysteresis effect This may at some voltage levels and frequencies cause the selection of a range that 15 not best suited for the current measurement This adds an uncertainty 0 6 at 100 mV There are also external factors which may randomly affect the measurements
31. ion Measurement Instruments AU PO CA200 Calibration System User manual The CA200 Calibration System Introduction The CA200 Calibration system 1 used to calibrate a standard transducer against a reference transducer with known characteristics The system is primarily intended for field calibra tion of Accelerometers but also allows for calibration of Velocity and Displacement sen sors with lower accuracy The calibration system consists of three major parts e CA200 Calibration Amplifier The Vibrograph Virtual instrument installed on a e A reference transducer mounted in a fixture on top of a shaker Picture 1 CA200 Calibration System Setting up the system Before using the calibration system all parts must be properly set up and connected The re commended procedure is as follows 1 Prepare the reference transducer with its fixture to achieve stable test conditions 2 Connect the reference transducer and the transducer to calibrate to Calibration Amplifier 3 Install Vibrograph Virtual instrument software on a 4 Connect Calibration Amplifier to PC via USB connector CA200 Calibration System User manual Prepare the reference transducer and fixture To achieve accurate test conditions the fixture with the transducers and shaker must be placed on a steady foundation Depending on the requirements of accuracy a desk top or any other stable surface may so
32. itivity Graph you must have performed a scan plot by pressing the START STOP button in the Plot panel To store the version that includes a Sensitivity Graph use the command Save at the bottom of the Plot panel To store the short version without Sensitivity Graph use the command Save short report at the bottom of the Frequency panel Note that For best accuracy in a short report you should first set the Signal amplitude to the preferred level and then wait for at least 15 s to allow the signals to stabilise This 1s because the algorithm that calculates the sensitivity needs this time to collect a sufficient number of readings to calculate a proper value for the Sensi tivity 32 CA200 Calibration System User manual Change company logo or other information in the Calibration Certificate Some general information in the Calibration Certificate not immediately related to the trans ducers can be modified in the Header form under Report in the Main Menu The data you can enter change is the Company name Company logotype and 3 lines of addi tional information The additional information may be anything you consider important like address and or phone number to your company To change Company name or information in Line 1 3 pick the corresponding field then enter new data from the keyboard To change the logo pick the button with the magnifying glass Change logo Fig 27 Change logo button
33. ment results are by regular calibrations of the laboratory s standards traceable to the Swedish National Standards for acceleration electrical quantities and time and frequency To ensure international equivalence and acceptance of the established traceability interlaboratory comparisons are made between national laboratories Equipment Reference accelerometer Endevco 2270MS ser no AD7T4 Conditioning amplifier Br el amp Kjaer WB1372 inv no 503465 Voltmeter Agilent 3458A ser no MY45044050 Signal analyser Hewlett Packard 3562A ser no 3216405549 HeNe laser Uniphase 1303P ser no 724898 Universalcounter Hewlett Packard 5316B ser no 3005406239 Signal source Stanford Research Systems DS360 ser no 61240 Charge amplifier Br el amp Kjaer 2650 ser no 976097 SP Technical Research Institute of Sweden Energy Technology Acoustics H kan Andersson Jonas Pettersson Technical Manager Technical Officer 40 CA200 Calibration System User manual Reference Volt Meter Agilent Technologies M Sdn Bhd 012767 W NILUM z Bayan Lepas Free Industrial Zone A Agilent Technologies 11300 penan ANT Malaysia 5962 0476 Certificate Of Calibration Certificate No 34401AMY47019834 Manufacturer Agilent Technologies Description Digital Multimeter Model No 34401A Serial No MY47019834 Options Installed With Specifications N A Date of Calibration 06 FEB 2009 Temperature 23
34. metimes be considered adequate For highest accuracy it 1s recom mended that the shaker is placed and fastened on a heavy metal plate according to fig 1 To minimize the risk of unwanted interference between the transducers and the Calibration Amplifier these should be placed on separate tables 2 1 fg There are 3 holes in the bottom of the shaker Drill 3 corresponding AS holes in the metal plate and use 3 10 2 size screws to fasten the shaker to the metal plate A We 47 mm Fig la Place shaker on top of a heavy Fig 16 Bottom side of shaker metal plate Connect transducers to Calibration Amplifier The reference transducer is mounted inside the aluminium frame on top of the shaker 1 in fig 1 Connect one end of the coaxial cable a in picture 2 to the transducer and the other end to the input marked Reference on the Calibration Amplifier Picture 2 Cables used for connecting transducers and shaker to Calibration Amplifier CA200 Calibration System User manual On top of the aluminium frame there is a hole for an M6x1 mounting stud 2 in fig 1a Here you fasten the transducer that shall be calibrated Then connect the cable from the transducer to the input marked Measured on the Calibration Amplifier Before using the Calibration Amplifier you must also connect the Power cord to the contact at the back of the instrument Then switch it on by pressing the Power S
35. nd the calibration sheet for the reference transducer provided as a part of the documentation for the system Enter the sensitivity found on this sheet at reference frequency in the Sensitivity field All other data which can be specified in this menu can also be found on the same sheet Spe cify the other parameters where you find it prudent When you are satisfied that all valid parameters are correct you can save the data and close the form by picking the Save button at the bottom to the right in the form By default the sensitivity that is specified in the Edit Reference transducer form will be applied for the entire frequency range though in reality it may only apply to one frequency It is strongly recommended that you enter this frequency often 159 Hz as Reference frequency for Sensitivity Calculation in the Ref freq field in the Plot panel The deviation from the sensitivity in and or mV is listed in a table for a number of frequencies It 1s possible to compensate for these deviations by entering data in the form that is displayed when you pick the Calib button at the bottom left in the Edit Reference Transducer form If data is entered in this form they will replace the sensitivity specified in the Sensitivity field Reference transducer sensitivities If you decide to specify any values in this table a ihe Fekk need to be Medin you must do this for at least two frequencies Note that these value
36. not turn off power to the amplifier or un plug the USB cable during firmware up date In such case the update may fail and the instrument may not work If this hap pens the instrument must be returned to factory for restoration of the firmware 27 CA200 Calibration System User manual Accuracy As the CA200 system is used to calibrate transducers it is important to consider the accuracy of the system The in accuracies affecting the calibration results are of two major types Mechanical Effects from in accuracy in the reference transducer its mounting and the surface it 1s placed on e Electrical Accuracy of the digital volt meter and other electronics in the CA200 calib ration amplifier deviation between the two channels and finally the calculations in the presentation programme in the PC To achieve consistent measurement results the CA200 Calibration Amplifier should be switc hed ON at least 15 min preferably 30 min before use to allow it to warm up to normal wor king temperature Mechanical The reference transducer provided is calibrated at VMI against a reference transducer which in its turn is calibrated at SP Technical Research Institute of Sweden to an accuracy of or better than 0 4 in a frequency range from 20 500 Hz 0 5 at 1000 Hz 0 7 at frequencies 10 and 2000 Hz 1 2 at 5 kHz The effects from the mounting of the reference transducer in relation to the transd
37. ollowing pop up form will then appear Edit Calibrated Transducer Manufacturer Code Code should be the type code for the transducer that is calibrated Serial no its serial number Both these parameters should be available in the X Ka Cancel Save manufacturers documentation Fig 7 Edit Calibrated Transducer form Tag name It is recommended that you enter data in as many fields as possible Tag name may be omit ted though as the text will appear in the Calibration Certificate If any field 1s left blank in the form the corresponding field will be blank in the Certificate The Edit Calibrated Transducer form can also be accessed using the Set button in the Calibrated panel Calibration Options The Vibrograph Virtual instrument allows the user to select calibration frequency either continuously with 1 Hz resolution between 5 and 2000 Hz or at 5 KHz for transducers that needs to measure at higher frequencies The currently calculated sensitivity for the tested transducer can then be monitored in real time on a display in the Calibrated panel The instrument also can plot a sensitivity graph for the tested transducer in relation to a selec ted calibration frequency and the reference transducers estimated acceleration selectable 0 5 g or I g The Sensitivity graph can be viewed on screen and also stored on disk as a part of a Calibration Certificate for the calibrated
38. ometer Kistler 8704B50 2051899 F908797 1 Reference Multimeter Agilent 34401A MY47019834 34401MY47019834 Vibrator LDS V203 1005b 9 30 CA200 Calibration System User manual Quick reference How to Change correct parameters for the Reference Transducer Parameters for the Reference Transducer are specified in the Edit Reference Transducer form You find it under Settings in the Main Menu It is essential for the accuracy of all calibrations that correct data 1 specified for the reference transducer Most important 1 the Sensitivity which is used as a reference for all further calib rations In addition to Sensitivity you can also enter Manufacturer Type of transducer Serial num ber for the transducer Number Identification of the Calibration Certificate and expiration date for the calibration To change enter new data use the mouse to pick the corresponding field in the form Then write the new data on the keyboard Enter parameters for the transducer that shall be calibrated Parameters for the Transducer that shall be calibrated are specified in the Edit Calibrated Transducer form There are two ways to access this form you find it under Settings in the Main Menu and also using the Set button in the Calibrated panel Each time you want to calibrate a new transducer some data must be changed to produce a valid Calibration Certificate It is recommended that you enter data in all fields as the text ent
39. on in the Frequency tab LL ea Single frequency mode 5 0 kHz selected Fig 26 Continuous 5 0K Hz button 2 Proceed as described in pt 2 3 above View a Calibration Certificate There are two versions of the Calibration Certificate a standard version that includes a Sensitivity Graph and a short version which only shows the sensitivity at the calibration frequency Before viewing a Calibration Certificate that includes a Sensitivity Graph you must have performed a scan plot by pressing the START STOP button in the Plot panel To view the version that includes a Sensitivity Graph use the command Preview at the bot tom of the Plot panel To view the short version without Sensitivity Graph use the command Preview short report at the bottom of the Frequency panel Note that For best accuracy in a short report you should first set the Signal amplitude to the preferred level and then wait for at least 15 s to allow the signals to stabilise This 1s because the algorithm that calculates the sensitivity needs this time to collect a sufficient number of readings to calculate a proper value for the Sensi tivity Store a Calibration Certificate There are two versions of the Calibration Certificate a standard version that includes a Sensitivity Graph and a short version which only shows the sensitivity at the calibration fre quency Before storing a Calibration Certificate that includes a Sens
40. on System User manual Connect Calibration Amplifier to PC When the Calibration Amplifier is connected to the PC for the first time the CD ROM with the installation software must be inserted in the CD player Make sure that it 1s so before proceeding any further On the front panel of the Calibration Amplifier to the right there is a small USB contact In sert the small connector of the provided USB connection cable in this contact and the other connector into one of the PC s USB contacts The USB driver needed for communication between the PC and the Calibration Amplifier is then automatically installed and the system 1s ready for use 10 CA200 Calibration System User manual Using the CA200 Calibration System When the Calibration System has been properly set up and all units are connected the calib ration process 1 almost completely controlled from the Vibrograph 9 Virtual instrument on the PC The only major handling of the hardware 1 the changing of the transducer that shall be calibrated fig 1a each time you want to calibrate a new one Calibrating standard transducers using the Vibrograph interface Before starting the calibration process some data must be specified for the transducer which shall be calibrated These data will then appear in the Calibration Certificate Pick Settings in the Main Menu to display available sub commands From the sub commands pick Edit Ca librated Transducer The f
41. purpose is to make repairs and indicate the original invoice number and date of shipment to you 1f possible CA200 Calibration System User manual About the manual This manual is subject to change Even though great effort has been made to make the infor mation in this manual complete and free from errors there could be things we have missed because of the large amount of information As a result of this we might change and correct these things in later issues without further notice Also changes in the calibration equipment may take place affecting the accuracy of the infor mation Current version Ver 1 5 Date Nov 22 2010 Listed reference equipment are valid for CA200 ser No 09081 and higher unless otherwise is specified in the Calibration Certificate Appended calibration certificates for reference equipment may be outdated If necessary copies of the latest certificates can be acquired from VMI Declaration of Conformity Equipment CA200 Calibration Amplifier VMI AB declares that the CA200 product is manufactured in conformity with national and interna tional regulations The system complies with and is tested according to following requirements EMC Directive 2004 108 EC Low Voltage Directive 2006 95 EC Including amendments by Directive 93 68 EEC 27 May 2009 VMI AB Bo Osterberg Managing Director o gies p 7 1 f PL C ALE P it i odi Vibrat
42. report or Save short report The frequency can only be adjusted in Continuous mode so if mode is set to 5 0 KHz the arrow buttons will not be visible 5 0 KHz Continuous default mode Fig 18 Continuous 5 0K Hz button The Reference panel Before using the commands in the Reference Panel you must first click on the Reference tab the heading at the top to select the panel Reference When the heading is blue this panel is selected Current signal amplitude Adjust Signal amplitude Up Down 10 step Adjust signal amplitude 1 step Adjust signal amplitude 0 1 step Fig 19 Reference panel In the Reference Panel you specify the amplitude of the vibrations in 1024 steps from to 1023 by clicking at the arrow buttons The left hand arrows adjust the amplitude up or down in 10 steps the middle arrows in 1 steps and the right hand arrows in steps of 0 1 Note that the highest possible amplitude 15 not 100 but 102 3 In the displays at the upper part of the panel you can see the measured voltage and the cor responding acceleration calculated from the specified sensitivity of the reference transducer 20 CA200 Calibration System User manual The control field below Frequency Reference amp Calibrated panels Below the Frequency Reference and Calibrated Panels there is a field with some control buttons which can be immediately accessed at any time when it
43. rs you can Switch the CA200 OFF then ON again Then press the ON OFF button on the Vibrograph interface c 200 Instrument does nat respond If there still is no contact unplug USB cable for approximately 5 seconds then insert it and press the ON OFF button again Fig 9 Error message If none of the above has any effect you may have to specify the communication port to be used manually using the command Communication under Settings 12 CA200 Calibration System User manual Shutting down the Calibration System When you have finished calibrating and want to turn the Calibration System OFF it is commended that you e First close the Vibrograph virtual instrument or at least set the Signal amplitude to 0 To close the programme use the Exit button under the Plot tab To set the amplitude to 0 either use the arrow buttons in the Reference tab or hit the pink STOP button e Then switch the CA200 Calibration Amplifier OFF Otherwise if the amplifier is still sending signals to the shaker when the CA200 is switched off a short pulse may occur at the Audio output causing the shaker to make a final jump This does not create any immediate damage but the sound may be irritating Also during long term use it will cause some un necessary wear on the equipment 13 CA200 Calibration System User manual Menu structure in the Vibrograph interface The commands in th
44. s are optional so you don t have to fill in all The values that you do enter must be cor rect though Otherwise the calibration will give m less accurate result instead of better Note also that the values specified here replace the 48 0 995 sensitivity specified in the Edit Reference Trans nuit ss By picking the Check box you perform a validity HE SG check to verify that the values are not completely out of bounds and also sort the table contents Accepted sensitivity values must be in the range 0 5 1 5 times the reference sensitivity from the Edit Reference Transducer form Values outside this interval are displayed against a red back ground Fig 5 Reference transducer sensitivities form Note that If your PC uses UK or US Character sets the values must be entered with decimal points as in fig 5 If the PC instead for example uses Swedish or Finnish Character set de cimal commas must be used instead When you have entered the data you wish to specify performed a validity check close the form and save data by picking the Ok button or pick Cancel to close the form without saving CA200 Calibration System User manual Customize Calibration Certificate Before starting calibrations it is recommended that you customize the Calibration Certificate Pick Report in the Main Menu to display available sub commands From the sub commands selec
45. t Header form allowing you to specify some items in the report header is then disp layed LE Edit Report Header Company name AB Sco line 1 Torsgrand 15 Line 5 60363 Norrk ping Line 3 Company logo Optimum size 270X 108 pixels yum Pick this button to pa 7 select a new logo Change logo Fig 6 Edit Report Header form In this form you can enter your company s name and some additional information including the company logo The company logo 1s optional and may be any pictures file including gif Jpg etc The optimum size is 270 x 108 pixels but the image may have an arbitrary size The image will be stretched to fill assigned area 1n the report header so to maintain the correct proportions its width should be 2 5 times its height To exit and store the settings pick the Save button The Vibrograph software is then ready for use Specify reports folder optional By default all Calibration Certificates are stored in the directory Report under the Vibro graph system directory If you don t want to store the Certificates in this directory you can specify another one using the command Set reports folder which is found under Settings in the Main Menu This command opens a navigator window in function similar with the stan dard Windows navigator but with one difference You can only select between already existing folders not create a new one CA200 Calibrati
46. t the text on any line except the first to replace it with the corresponding mes sage in your local language but always leave the number and the tab unchanged If you choose to use another text editor than Notepad it 15 important to make sure that the editor does not replace the tab with spaces The first line with the text Vibrograph must not be changed Then save the file to store the modifications The next time you start the Vibrograph programme the text 1n the menus and messages will appear in your own language Note Before installing a new service pack for the Vibrograph application make a back up copy of your modified Vibrograph txt file When the service pack is installed the existing file will be overwritten with a new file which may hold more messages than the old file In this case you can copy the already translated lines from the back up copy Then only the newest messages will require translation 26 CA200 Calibration System User manual Upgrading the CA200 Firmware The CA200 Calibration Amplifier can be upgraded using a binary image file and the Loader application The binary file containing the firmware is named CA200 xxx bin where xxx is the version number Copy the latest file of this type into the BIN directory present under the applications directory default C Program Files Vibrograph Make sure that the CA200 Calibration Amplifier is powered on and connected to the PC and close the
47. tatus display In this case you only need to wait a few 1 5 minutes and then restart the CA200 When the instrument is OFF it will cool fast If the temperature is back within acceptable limits 24 CA200 Calibration System User manual when the instrument is re started it will start normally If the overheating condition prevails the instrument will not start In this case you will have to wait a few minutes longer before attempting a restart To prevent the power amplifier from overheating try to avoid applying high amplitude vibra tions to the shaker for very long time periods This usually occurs at low frequencies at 30 Hz and below when the built in power amplifier works at a high percentage of its maximum ca pacity When the CA200 Calibration Amplifier 15 use for long time calibrating a long series of transducers it is prudent to from time to time make a short break Vibrograph seems to calculate incorrect values Check settings in Edit Reference Transducer form If the value for Sensitivity differs from the value specified for the Reference transducer in the Calibration Certificate all calculations will be affected If data has been entered in the table in the Calib form remember to check these too Check coaxial cables If a cable has been bent or damaged in any way this may affect the quality of the signal Check also that there isn t any tension in the cables so that the trans d
48. the Vibrograph instrument is switched ON it attempts to communicate with the Calibration Amplifier Normally when contact has been established the ON button on the Vibrograph Instrument will glow yellow showing that the system is ready for use If the following error message appears communication couldn t be established ibrograph Fig 23 No response error message If this occurs first of all make sure that the Calibration Amplifier is switched ON Check that the green light on the front panel glows If the Calibration Amplifier is ON switch it briefly OFF then ON again Then press the ON OFF button on the Vibrograph interface If there still is no contact unplug the USB cable for approximately 5 seconds then insert it and press the ON OFF button on the Vibrograph interface again If none of the above has any effect you may have to specify the communication port manually using the command Communication under Settings Overload After a long period of high amplitude vibrations mainly at low frequencies lt 30 Hz the power amplifier may overheat In this case the built in protection will shut down the CA200 Calibration Amplifier to prevent any damage and the temperature status field in the Calibrated panel displays the text OVERLOAD Displacement sensor und Lii splacementr sensor Units Units Fig 24 Overload message left and normal status right in the temperature s
49. ucer under calibration have been tested using two transducers with well defined characteristics In the first test one of the transducers are mounted at the top of the fixture and the other one inside below Then the transducers positions are switched the test is repeated and the results com pared At no time any larger difference than 0 4 has been observed at any frequency inside the interval 10 2000 Hz The contribution to uncertainty from this factor is assumed to be 0 6 At 5 kHz the effects may be larger The estimated uncertainty at 5 kHz is 1 5 96 Other mechanical effects are small inside the frequency interval 10 2000 Hz as long as the shaker 15 properly fastened on a stable surface The estimated contribution to uncertainty from this factor 0 4 At 5 kHz the contribution to uncertainty 1s estimated to 1 5 Transverse Sensitivity for the reference transducer 1 0 9 For standard Accelerometers the Transverse Sensitivity lt 2 As the transverse vibration in the vibrator lt 5 90 the uncertainty caused by this factor 0 1 96 Electrical The digital volt meter 1s calibrated against a reference voltage measured with a volt meter with high accuracy better than 0 2 90 The deviation between the two channels for Reference and Calibrated transducer has two components an offset different at different frequencies and an uncertainty 28 CA200 Calibration System User manual The offs
50. ucers and the frame on top of the shaker can move freely Check that connectors BNC Audio as well as USB are properly fastened Otherwise especially during vibration play contact may occur At 10 Hz Vibrograph v 3 3 and older could under some circumstances start measuring too early before the signal has stabilized Then there may be a large 1 percentage point difference between the calculated sensitivity 10 Hz and the calculated sensitivity 20 Hz If you suspect that this has occurred restart the plot 25 CA200 Calibration System User manual Modifying and updating the CA200 Calibration System Translate the menus to a new language The menus and messages that are displayed by the Vibrograph Virtual Instrument can be easily translated to any language as the text strings that appear are stored as references in an ASCII file First find the file Vibrograph txt This file 1 located in the applications directory default C Program Files Vibrograph Before making any changes to the file make a back up copy Then use Notepad to open the file Example start of Vibrograph txt file 1 Vibrograph 2 Stopped 3 Started 4 Settings 5 Communication 6 Edit Reference Transducer y Edit Calibrated Transducer 8 Exit 9 Report 1 0 Header 11 LZ RTE Each line starts with a number then a tab as separator and last the text that is displayed in the corresponding menu or message You may edi
51. witch also at the back When the instrument is ON a green light will glow on the front panel to the left To control the shaker use cable b in picture 2 to connect the contact on the shaker 3 in fig la to the Signal out connector on the Calibration Amplifier front panel Reference www vmiab com Fig 2 Front panel on the Calibration Amplifier Other connectors on the front panel are to the left two outputs providing 24V DC to trans ducers that requires an external power source To the right there is a small USB connector for connection with PC Above Measured and Reference connectors there are two out puts one above each providing access to the signals from the corresponding transducer CA200 Calibration System User manual Install Vibrograph Virtual instrument software in PC This software is compatible with Microsoft Windows 98 ME NT4 2000 2003 XP and Vista or higher operating system Before running the Setup program all other running programs including anti virus software should be closed Otherwise they may interfere with the installation Find the installation program Depending on how you have obtained the software the installation program may be on diffe rent form From CD ROM When you buy a CA200 Calibration System a CD ROM with software is provided as a part of the package Insert the CD ROM into the CD player Because of the
52. y calibration is performed in accordance with the fringe counting method and the sine approximation method described in ISO 16063 11 1999 The mounting torque was 2 Nm and the surfaces were greased with thin oil Measurement conditions Room temperature 49 ds AC Relative humidity 40 15 Results The sensitivity measured by a y method is Expanded uncertainty SP Technical Research Institute of Sweden Postal address Office location Phone Fax E mail National Laboratories are designated by the Swedish Government according to the SP Vasterasen 46 10 516 50 00 Act 1992 1119 and the Decree 1993 1065 concerning testing and metrology Box 857 Brinellgatan 4 46 33 13 55 02 This document may not be reproduced other than in full except with the prior SE 501 15 Bor s SE 504 62 Bor s info sp se written approval of SP SWEDEN SWEDEN 39 CA200 Calibration System User manual Date Reference Page M A IDDEDINACCPBEUIC 2009 05 05 908797 1 2 2 The reported expanded uncertainty of measurement is stated as the standard uncertainty of measurement multiplied by the coverage factor k 2 which for a normal distribution corresponds to a coverage probability of approximately 95 The standard uncertainty has been determined in accordance with EA Publication EA 4 02 The long term stability of the calibrated object is not included in the reported expanded uncertainty of measurement Traceability The measure
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