I'm reading a sine wave generated by a AO DAQ and reading this same signal with another AI DAQ and a DMM at the same time.
AO is set at 0.65V
AI RMS reads 0.5V±0.0056
DMM reads 0.46053V ± 0.00001
0.65/1.414=0.46 so the DMM read is accurate.
What makes the RMS LabVIEW function not reporting the accurate information? Could it be the Glitch Energy affecting the read?
On a side note, I also need an accuracy of 0.2%.
AO generates a 3KHz signal at 0.65V (450KS/s @ 150S/Buffer).
AI reads at 90KS/s at 15KS/channel.
DMM a 34401A is set VAC.
Thanks