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1. Confirm your changes with lt Apply gt Step 2 Adjusting the additional parameter and offset For this step it is important to Know which forces you are expecting only in one direction in either directions regular or irregular arranged as it defines the zero point on the digit scale Example You are expecting forces in both directions and those forces are similar to each other Then it is advisable to put the zero point in the middle of the measurement range To get the zero point in the middle of your measurement range you need to put the digits of the unstressed component in the middle of the digit measurement range The digit measurement range is from 0 to 65535 digits so the middle is 3276 7 digits You have two options to get the digits to your required value for example 32767 digits 1 For rough adjustment you use the additional parameter 2 For fine adjustment you use the offset Strain Gauge Module page 8 12 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 The additional parameter changes the bridge offset It is used for rough adjustment as it is amplified too To change the additional parameter select the channel you want to adjust and select tab Parameter Enter the new value in the corresponding field E b System Logger General Analysis Fixpoint Formula Parameter Data type Telemetry
2. 2d datarecording com English 1 7 pr TE n N me Pao 1 VLE x nil ti N Ni a Sg Ai K Zh Strain Gauge Module modified 22 05 14 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 Content 1 2D STRAIN GAUGE MODULE cs sccssescesescessecsccecsccecscsscacescacsecacsecarsecaescesrsceseaceseacsseasseearere 3 2 THE AMPLIFICATION IN A 2D STRAIN GAUGE MODULE ccrcerceeece cene 4 3 HOWTO PUT THE STRAIN GAUGE MODULE INTO SERVICE csecersecerzienee 6 Symbols used in the text These paragraphs contain tips and practical advice for working with the 2D system In the paragraphs highlighted with this symbol you will find additional information and it is very important that you follow the instructions given Documentation reference gt A user manual reference number is provided so the user can seek further assistance 5 Strain Gauge Module page 2 12 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 721 94485 29 1 2D Strain Gauge Module The 2D Strain Gauge Module is available for two or four full strain gauge bridges It contains programmable chips to amplify the incoming strain gauge signals and a CPU which translates the analog da
3. Sensor E i Logger BC SG2 Samplingrate Ya Interfaces Samplingrate Hz EB Channels Pao tg 29 di 5 Mar ANH Resolution 16 bit AA 02 AN 2 Parameter AA 03 Vext Amplification TI AA 04 Temp Offset 2500 0 mv Additional parameter fi 4 lt lt Confirm your changes with lt Apply gt When the digit value of the channel is as near as it gets to your required digit value for example 32767 digits with the additional parameter you start adjusting the offset To change the offset select the channel and go to tab Parameter There you can enter values between 0 and 5000 mV in the offset field The target is to get the digit value of the channel near your required digit value for example 32767 digits 5j b System Logger General Analysis Fixpoint Formula H Logge BC SG2 S amplingrate a Uy Interfaces S amplingrate Hz EE Channels plingrate H2 25 Mar ANHI Resolution 16 bit AA 02 ANH2 Parameter AA 03 Vext Amplification fo AA 04 Temp Offset 2500 0 MV Additional parameter fi 4 Confirm your changes with lt Apply gt Step 3 Adjusting the formula When the values for amplification offset and additional parameter are set you change the formula of the channel The formula is used to set the zero point to your required value of the measurement range and to adjust the multiplier Example lf you adjust the additional parameter and the offset in tab Parameter to be in the middle of the digit measu
4. sa FRS la Select lt Rule of Three Automatically gt in the next window Channel Calibration AN 1 Ea Clicking this button will start the rule of three dialog In this dialog you have to enter physical values correspondig to two voltage or digits values to calibrate the sensor Clicking this button will start the sampling of the channel to find the minimum and maximum value for this channel After the sampling the rule of three dialog opens and you have to enter the corresponding physical values for the sampled minimum and maximum Depending on the direction of the force it may be that the digit value of the stressed component is below the digit value of the unstressed component Please pay attention to that Now you click on lt Refresh Minimum gt when the component has the lower digit value unstressed or stressed with the Strain Gauge Module page 11 12 2D Debus amp Diebold MeRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 defined weight After that you set the second state stressed or unstressed and click on lt Refresh Maximum gt Then click lt OK gt Channel calibration Move the sensors to minimum and maximum position and click OK Refresh Mimimum Refresh Maximum Minimum Maximum Delta Change 01 ANH Scanning 27005 0 27005 Scanning 27020 0 27020 15 lv X Cancel Reset Enter the values in the next
5. 10 in the old formula Next you enter the offset of the formula You want to have the value of your channel to be 0 as it is unstressed In the old formula you simply enter the value of the current digits in this example 32767 as the digits and the offset are subtracted before they are multiplied with the multiplier In the new formula the digits are multiplied with the multiplier before the offset is added Therefore you have to enter the value of the multiplied digits in this case 3276 7 Step 4 Calibrate the strain gauge channel After adjusting the formula of the channel you need to calibrate it Select the channel in the system tree and select tab Fixpoint Formula Click on lt Calibrate gt E Eon Logger General Analysis Q Logger Pr 3 BC SG2 Value calculation with Fixpoint Formula Min Gia ua i Interfaces theoretical theoretical 5 69 Channels Input 0 0000 1 8665 5 0000 2 4 Analog put V gt 01 ANH Complies digits at ADC 0 24464 65535 i AA 02 AN 2 Value on CAN bus A 03 Vext i Digits at AA 04 Temp Multiplier Divisor ADC Offset o J f fo 24464 0 24464 65535 T 32768 32767 1 65535 0 65535 32763 32767 A Physical value after calibration formula Multiplier Divisor Digits Offset 3 f 10 24464 32767 3276 7 830 3 3276 8 1 Number of different possible values 65535 1 1 65535 witharesolution of 0 1 Reset to identity Invert range Se oy Sn Se See Set Zero
6. gives you a step by step instruction on how to set the right parameters to the strain gauge module lt is assumed that you have already installed the 2D software on your PC and the full strain gauge bridges are installed ready to use To find the right settings and to calibrate your full strain gauge bridges you need a defined weight to put a stress on the components to be measured To put your system into service you need to connect the full strain gauge bridges to the strain gauge module and the strain gauge module to a logger The system needs an external power supply To change the setting you connect the logger to your PC via USB cable du your PC Strain gauge module N DI D J oO DI D cU CU _ i v 09 Start the program Winlt WinARace gt lt Communication F2 gt Select the strain gauge module in the system tree and go to the analog channels File Logger Graphic Calibration Specials Options Help DI EMI EE nr s Recofon nane sanplijsensor info ESL ANH 25 System Logger Logger Multiplicator Digits 0ffset 1 666 27434 6 666 Bc SG2 H 8 Interfaces x AN 2 25 1 999 27553 9 000 Elf Channels Ix Vext 468 0 0003 39411 68 6666 AES Temp 25 6 168 287 6 668 There you can see the input channels of the strain gauges AN 1 AN 2 in this example it is a strain gauge module for only two full strain gauge bridges This view is important as you can ch
7. offset and the offset should be 2500 mV You can start with the given amplification or change it if you already know in which range the amplification should be If you change anything confirm your changes with lt Apply gt To find the right parameters for the first full strain gauge bridge e g AN 1 you take a note of the digits of the unstressed component and the component stressed with the defined weight in loading direction File Logger Graphic Calibration Specials Options Help INA Hw KEO A ie Name samplifsensor info 25 E System Logger Multiplicato Offset pad ANHA 1 009 8 000 H t Interfaces ANH2 25 1 666 6 666 Ele Channels Vext 490 8 0003 39414 0 000A n Temp 25 0 199 287 6 666 Calculate the difference between those two values stressed and unstressed Now you check if the measurement range is okay or if you have to adjust the amplification 65535 digits MCL stressing force dif ference between stressed and unstressed gf measurement range For example e Unstressed component value 32770 digits e Stressed component value 34400 digits gt Difference 34400 digits 32770 digits 1630 digits e Defined weight 10 kg gt Stressing force 10 kg 9 81 98 1 N 65535 digits 98 1 N 3944 N 1630 digits measurement range If you re expecting forces in both directions of about 1500 N 1500 N you need a measurement range of at least 3000 N 1 The accelerati
8. ameter Data type Telemetry Sensor f BC SG2 Calibration a Interfaces Multiplier Zero position El Ee Channels Value f x Digits Offset EAA Analog 1 Calibration a AA 01 ANG 3276710 327577 o AA 02 ANH2 1 New Formula AA 03 Vext AA 04 Temp Graph Member of group ___ ShowGraoh__ NG 9 Group Engine Group 10 sio Suspension Telemetry Color a C Timecitt TM TeleScope Temperature 1 TeleSave Lower limit Pressure Group 14 0 0 FIACC Group 15 msm Brake Press Group 16 0 0 lt gt Enter the new values for multiplier and offset in the fields Confirm your changes with lt Apply gt Strain Gauge Module page 10 12 2D Debus amp Diebold MeBsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 Example You want the zero point to be in the middle of the measurement range and you re expecting forces from 3000 N to 3000 N In tab Parameter you have already set the right parameters and now you want to change the formula of the channel in tab Analysis You can choose between the new formula and the old formula To get the right value of the range you enter the multiplier The range is from 0 to 65535 like the digits As you don t need such a big range you can scale it down In this example you need the range to be at least 6000 from 3000 to 3000 Therefore the multiplier will be 0 1 in the new formula or 1
9. eck the digits values of the channels easily Step 1 Finding the right amplification The amplification is important to get the right measurement range If the amplification is too high 3 you have a good resolution but the measurement range in digits is not enough And if the amplification is too small 1 then the measurement range is too big or rather the measurement data could be more accurate Therefore you need to find an amplification which is adequate for your requirements 2 L f I 7 a fi I I I I I I I I I I I I Orange 1 the amplification is too small Green 2 the amplification is adequate Red 3 the amplification is too high Measurement range needed for your requirements Measurement range available in digits 0 65535 strain Gauge Module page 6 12 2D Debus amp Diebold Mefsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 721 94485 29 Double click on the channel you want to adjust e g AN 1 and check the tab Parameter Channel Setting 1 AN 1 General Analysis Fixpoint Formul Parameter Data type Telemetry Sensor Samplingrate Samplingrate H2 25 Resolution 16 bit Parameter Amplification Offset Additional parameter Display Filter No Filter Length 7 Digits after dot mu l In the beginning the additional parameter has to be 14 as it means there is no bridge
10. on of gravity g9 9 81m s may differ depending on your location strain Gauge Module page 7 12 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 721 94485 0 Fax 49 0 721 94485 29 Now you have three options 1 The measurement range is too small You have to reduce the amplification in tab Parameter Afterwards you do the same procedure as before Example Your measurement range is 1200 N your amplification is 1000 you need a measurement range of at least 6000 N gt adjust your amplification to 200 and start again 2 The measurement range is too big You should increase the amplification in tab Parameter Afterwards you do the same procedure as before Example Your measurement range is 8000 N your amplification is 250 you need a measurement range of at least 4000 N gt adjust your amplification to 500 and start again 3 The measurement range is adequate Your amplification is set go on with step 2 To change the amplification select the channel you want to adjust and select tab Parameter Enter the new amplification value in the corresponding field e System Logger General Analysis Fixpoint Formula i fey Logge BC SG2 S amplingrate Ya Interfaces Samplingrate Hz DE Channels ree Os 7 EAA Analog Resolution 16 bit A OT ANE AA 02 ANH2 Parameter AA 03 Vest Amplification ho AA 04 Temp Offset 2500 0 mi Additional parameter fi 4
11. rement range the zero point of your measurement range will be in the middle as well With the offset of the formula you shift the zero point of the scale y scale in the diagram below And the multiplier will change the range value Strain Gauge Module page 9 12 Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 2d datarecording com 30000 40000 50000 60000 2D Debus amp Diebold MeRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 70000 For changing the formula you select the channel in the system tree and select tab Analysis There you can choose between the new formula and the old formula click on lt Old Formula gt or lt New Formula gt respectively New formula System Logger amp Logger BC SG2 Calibration a Interfaces GE Channels Value f x Multiplier Fixdigits EAA Analog gt AA 01 ANH 32767 0 fi 32767 AVA 02 AN 2 AA 03 Vent AA 04 Temp Graph Member of group Show Graph Engine Displ miei _ Suspension Color M tinea Temperature Lower limit Pressure 0 0 acc Upper limit Brake Press lt 0 0 General Anabs FpointFormda Parameter Data type Telemetry Sensor Zero position Calibration Offset Group 9 Group 10 Telemetry MTeleScope _ITeleSave r Group 14 m m JGroup 15 _ Group 16 vw Old formula a Analysis System Logger Gey Logger Fixpoint Formula Par
12. ta from the strain gauges into CAN data These CAN data can then be sent via CAN bus to a logger for recording the data Strain Gauge Module page 3 12 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 2 The amplification in a 2D Strain Gauge Module The amplifier chip in a 2D Strain Gauge Module offers three different parameters to adjust the amplification gt Bridge offset gt Amplification gt Output offset Amplification Strain gauge Bridge offset additional parameter You can find these three values in tab Parameter field Parameter of your channel Channel Setting 1 AN 1 General Analysis Fixpoint Formula Samplingrate Samplingrate Hz 25 v Resolution 16 bit Parameter Amplification Offset Additional parameter Display Filter No Filter Lenath 2 Digits after dot T i Amplification The amplification can be set from 10 to 1000 whole numbers The entered value is directly used as amplification with an accuracy of 2 1000 An amplifier adjustment is not required Section 3 Step 1 describes how to find the right amplification Output offset The output offset in Win t offset is used to adjust the output voltage of the amplifier It is possible to correct single side used bridge sensors or burdened sensor bridges The inserted value is directly used as a
13. voltage and it is independent of the amplification The value is added to the amplified bridge signal Values from 0 0 to 5000 0 mV can be set Section 3 Step 2 describes how to find the right offset value strain Gauge Module page 4 12 2D Debus amp Diebold MeBRsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 21 94485 0 Fax 49 0 21 94485 29 Bridge offset additional parameter The bridge offset in Winlt additional parameter is used to correct the offset of the sensor There is the possibility to compensate negative and positive offsets of the used bridge The usable values are between 0 and 28 The default value is 14 This means that no compensation is used The next table shows the different parameters and their bridge adjustments Bridge adjustment Bridge adjustment Parameter Parameter mV mV 0 59 50 15 4 25 1 55 25 16 8 50 2 51 00 17 12 75 3 46 75 18 17 00 4 42 50 19 21 25 5 38 25 20 25 50 6 34 00 21 29 75 7 29 75 22 34 00 8 25 50 23 38 25 9 21 25 24 42 50 10 17 00 25 46 75 11 12 75 26 51 00 12 8 50 27 55 25 13 4 25 28 59 60 14 0 Section 3 Step 2 describes how to find the right offset value Strain Gauge Module page 5 12 2D Debus amp Diebold Mefsysteme GmbH Alte Karlsruher Str 8 D 76227 Karlsruhe 2d datarecording com Tel 49 0 721 94485 0 Fax 49 0 21 94485 29 3 How to put the strain gauge module into service This section
14. window For example 0 as the lower physical value as the component is unstressed and 98 1 as the upper physical value as the component is stressed with a weight of 10 kg 98 1 N Calibration of channel 01 AN 1 Unit C Fixpoint digits Digits Volt Lower physical value Value Volt at 2 056764 Upper physical value Value Volt gt 27020 at 2 061494 Click on lt OK gt and confirm the calibration with lt Apply gt Step 5 Set the channel to zero Before you use the system you should set the strain gauge channels to zero Therefor it is useful to use the auto zero function You can enable this function in tab General of the channel 5j b System Logger General Analysis Fixpoint Formula Parameter Data type Telemetry Sensor H Logge BC SG2 H t Interfaces na ANH amp Channels AA Analog Dimension p AA 01 ANH Short cut AA 02 ANH2 A 03 Vext AA 04 Temp Channel Type Analog Channel Mode Recording lv D i E Auto zero DE PT E r Then you simply hit the auto zero button and the channels which have the auto zero function enabled will be set to zero File Logger Graphic Calibration Specials Options Help page 12 12 Strain Gauge Module

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