Hi everyone!
I am new to Labview and I am working on creating a VI that displays force values from a load cell that has been installed in an industrial tool. The signal is being carried from the load cell into a PC by a NI-9237 module and USB carrier. I created a custom linear scale and virtual channel (Custom Voltage w/ Excitation) in the VI based upon the manufacturer's calibration profile.
I have run into a problem where the waveform graph that is produced during data acquisition is indicating that the applied force is exceeding the capacity of the load cell. To confirm this I have recorded the voltage output at the load cell and within the labview program. What I have found is that the voltage signals do not match!!! For example while under a constant load, I will measure a voltage of 0.013 Volts with a multimeter, however the Labview VI indicates that the measured voltage is 0.029 Volts.
Does anyone have any thoughts why there would be an inaccuracy in the recorded voltage?
Thanks,
-JME