LabVIEW
Practical explanation of shunt calibration for NI-9236 using Strain - Continuous Input.vi
I am trying to understand the basic use of the Offset Null and Shunt Calibration in the "Strain - Continuous Input.vi" example with a NI-9236 module.
I have a very simple situation with one gauge connected. My expected behavior would be as follows:
Enter parameters of the gauge, configuration, excitation, GF, etc.
Set Enable Offset Null to TRUE
Set Enable Shunt Cal to TRUE
Set Timing
Run Program
What I do not understand is what happens with the program encounters the Shunt Cal portion of the code. It appears to execute an Offset Null followed by a Shunt Cal and then immediately proceed into running the loop with the read. My experience with dedicated strain gauge systems would be to execute the following behavior
Execute an Offset Null
Execute a Shunt Cal and check the value against a reference value - once satisfied with this value, remove the shunt from the circuit
Proceed to execute a test and data collection
I don't understand what to "check" if the Enable Shunt Cal is set to TRUE for this program. Any guidance would be most appreciated. Thanks.
