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 0.5VÂ±0.0056
DMM reads 0.46053V Â± 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.
The 34401A is not longer available in Canada. We need to change and use the 34461A as a replacement and we are having trouble with the peak-to-peak measurements (We are using LabVIEW).
We use the peak-to-peak option while reading a communication line in order to get the min and max values. The code:
This code no longer works with the 34461A. Reading the AC will only give the RMS values. We dont really care how to get the min-max of the communication channel, as long as it is in a respectable time (10s at most...). Reading the signal with DC is not fast enough. The communication signal is Â±100mv. We verify the min-max range to be around 200mV.