9237 Shunt Caliberation

[JK1]

Hai,

Am using crio 9002 controller, 9104 chasis and 9237 strain module.

Am trying to do shunt caliberation with 9237. When i measure the resistance across the 1(S+),10(S-) terminals the resistance value is oscillating between 125-138KOhms when the shunt caliberation is off.  My expectation is that i must get a open (infinite resistance) when shunt is off.  Why is this behaviour.

Am making measurements in full bridge configuration (3.3 V Ex) that doesnt match with my theoritical calculations. Is there any specific manipulation to be done with the acquired mV/V value.

 Any suggestions on this pleas help out. thanks for all help.

[Raajit_Lall]

Hello JK1,

Here is a good article that talks about the different calculations and configurations for the different types of strain gauge measurements.  What is the environment that you are making these calculations?  Are you seeing this behavior in Measurement and Automation Explorer and LabVIEW or just one or the other?

Regards,