I am using the instrument NI PXI-6052E to measure voltage. There is a large voltage signal that comes out when there is no voltage passing through the wire. The signal is about 3V, but it seems to vary a little (but not periodically). I have tried to do a number of things in both Labview and with the physical set up, but there is still this huge error. Can anyone help me?
What exactly do you mean by 'no voltage passing through the wire'? If the input signal is open, then what you are seeing is not unexpected - search for the topic 'ghosting'.
Hey, I forgot to reply with what happened. So, the imput signal wasn't open, but I looked up ghosting anyway and it helped. In the end, it turned out that we were using ports with different ground potentials.
