PXI-6229 Random Voltage on Analog Inputs

[TrackerMan]

Using PXI-6229 and the Sample .NET 2.0 AcqOneVoltageSample.2005 program and I get random values returned even if I short the AI pin to AI GND?

[Christian Mergl]

Sounds weird. You can use the DAQ Diagnostics Utility (http://joule.ni.com/nidu/cds/view/p/id/566/lang/de) to check your board.

Christian

[TrackerMan]

I ran diagnostics and everything passes. The Test Panel seems to work fine. The example program counts up when grounded.

I think I figured it out. The default is differential mode, setting RSE mode seems to solve the problem.

[Christian Mergl]

Hey,

Sorry for my late response, I had vacation.

You should have a look at the DAQmx help where the different terminal configuration modes are described.

There you also find which mode to use for what signal source (groundend, floating).

Christian