I am acquiring few voltage signals using NI-6221 connected through SCB-68 connecting box. When there is no voltage in the test setup the acquiring data shows some values. Is there any way to make this incoming signal zero when the equipment is off? I appreciate a help very much.
Values are large as 10V when there is no signal at all, but the values are shown as the waveform mode, kind of squire signal. If this is caused by the wiring problem how can I get rid of that? Is there some way to calibrate the DAQ.
The link given does not show how to rectify such problem. It is certain that my channels are not open, but as the link says the result is 10. Any suggestion to correct this?
The link given does not show how to rectify such problem. It is certain that my channels are not open, but as the link says the result is 10. Any suggestion to correct this?
What I meant by “no signal” is zero voltage. The source is a detector and when there is no light it shows zero in a voltmeter, but not in the acquired data from LabVIEW. Sorry if I made a confusion.
A voltmeter is not a good thing to judge 0 volts. A voltmeter when it's not connected to anything at all will read 0 volts. The detector may not actually be sourcing 0 volts. Try shorting the inputs of the DAQ board to gnd and see what the DAQ board reads.
When the inputs are shorted the DAQ board read the zero value.
If I connect a DAG input to a voltage output of preciouspower supply, should the DAQ reading be the same as the set voltage. This is just to check what the wrong here is.
