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PXI-6229 Random Voltage on Analog Inputs

PXI-6229 Random Voltage on Analog Inputs

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?
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Re: PXI-6229 Random Voltage on Analog Inputs

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

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Re: PXI-6229 Random Voltage on Analog Inputs

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.

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Re: PXI-6229 Random Voltage on Analog Inputs

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

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