Determine AC Current through DAQ

[VeritasAequitas]

Ya the calculation used to be different but it wasn't working then either. We are using an inverting op-amp configuration and are measuring the voltage on the output and using that to convert back into amps. What should our calculation be we have tried just about everything.

[Wayne.C]

ajh305,

It sounds like you have an AC voltage on the output of the opamp.  Measure its RMS value and scale accordingly.

What I said in earlier post about using complete cycles of data will have an impact on your overall accuracy of your AC rms measurements.

HINT:  It is often beneficial to test a vi like this with a sine wave that is generated by LV.