Reading the BridgeType in SCXI-1520 Example

[murali_vml]

1) In the SCXI-1520 example provided,the subvi "Convert Strain Gauge Reading.Vi" has 7 diffrent Bridge configurations(Qtr Bridge I,Qtr Bridge II,..)but the input provided from Main Program can use only options 0,2,4(Bridge control is multiplied by 2).How to use the others?
2)i see the formula used for QtrBridge I and QtrBridge II(in Convert Strain Gauge Reading.vi) are same,How both differs?

[LucaP.]

Hi Murali

1.) I asume that you're not using NI-DAQmx 7.0.x because I looked into the 1520 example for NI-DAQ 7.0 and there you've the option to select all bridge configuration types. If you're VI is not doing so, then recreate the input control.
2.) The formulas are the same, but the HW setup is different. The QTR Bridge 2 has One active strain-gauge element and one passive, temperature-sensing quarter-bridge element (dummy gauge). This is used for temperature compensation. Please review this tutorial for more informations:
http://zone.ni.com/devzone/conceptd.nsf/webmain/C18F65CE920C115086256D720058325B

Regards,
Luca

[murali_vml]

Yes,Iam not using 1520 example for NI-DAQ 7.0,if for that old 1520 example if i create a control with all the bridge configurations and use it,Is that OK?