Hello
I'm looking to find the power in a three phase system. As for instrumentation, I'm measuring three phase voltages and two phase currets (Isolated hall IC). All signals are max 100Hz.
I need to have the precise u*i reading. To do this, for one phase, the routine is; Measure Phase 1 Voltage vrt gnd --> Measure Phase 2 Voltage vrt gnd --> Calculate line voltage by taking Phase 1 voltage - Phase 2 voltage --> Measure current sensor voltage output --> Calculate instantaneous power by multiplying phase current by line voltage.
I'm still a bit uncertain as to how I fully calculate the three phase power - but that is beyond the general questions of this post. Those questions are:
Using DAQ assistant; My timing settings are continous samples, Samples to read: 5k, Rate (Hz): 5k. Does the DAQ read 5k samples of channel 1, then 5k samples of channel 2 and so on - or does it swap channel for each sample?
I get the whole aggregate sampling thing (250kS/s is divided between the signals to sample - but I'm confused as to how the signals are sampled. If I put 10 Samples to read instead of 5k, does the CompactDAQ simply send the data more often? or is the signals also sampled closer to each other?
Any help is appreciated 🙂
