Hello MajTal,
I’d recommend you to check the type of bridge that you’re using by reviewing the following document:
“Strain Gauge Configuration Types”
http://www.ni.com/white-paper/4172/en/
Also to make sure first that you’re able to use successfully one of the LabVIEW examples for strain-gages measurements.
I also found these articles which I think can hopefully be helpful.
Connecting Strain Gauges and Shunt Resistors to the NI 9237
http://digital.ni.com/public.nsf/allkb/892C84122A6501AE86257547007E5C53
Connecting a Strain Gage in a Quarter-Bridge Configuration to NI 9237 using NI 9949
http://digital.ni.com/public.nsf/allkb/ED161F9867C820998625796D00769DBC
NI 9237 Example for Shunt Cal and Offset Cal
http://www.ni.com/example/30816/en/
NI 9945 or NI 9944 with an NI 9237 Connection Guide
http://digital.ni.com/public.nsf/allkb/F47EFDB8B1992282862572AD007CE9C3?OpenDocument
How Do I Configure the Input Range of the NI 9237?
http://digital.ni.com/public.nsf/allkb/8869E00B851A868E862573D80066A1FB?OpenDocument
Best regards,
Daniel C.