Digital Multimeters (DMMs) and Precision DC Sources

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Setting Input Resistance on the PXI-4071

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The specifications for the PXI-4071 DMM indicate that the input resistance can be chosen as either 10 MOhm or 10 GOhm for the 100 mV, 1 V, and 10 V ranges. I see where this can be input on the instrument soft panel, but I have been unable to locate how to configure the input resistance when using the DMM in a VI. Suggestions?

 

Thanks!

Jeff

Jeffrey Zola
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You need to use a property node.


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Ah.  Looked at the Property Node, but didn't go deep enough. Nor could I find it in the help files or any of the other online documents.

 

Thanks!

Jeff

Jeffrey Zola
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@Jeffrey_Zola wrote:

Ah.  Looked at the Property Node, but didn't go deep enough. Nor could I find it in the help files or any of the other online documents.

 

Thanks!

Jeff


One other somewhat important detail I found necessary: You must use the "Change All To Write" option on the menu that comes up by right-clicking on the Property Node. Otherwise, the DVM remains with 10MOhm impedance.

 

Just thought I'd add this for those who search for this thread later on!

 

Jeff

 

Jeffrey Zola
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Hey Jeff,

 

That is correct.  Otherwise, you're simply reading the input resistance, which by default is 10MΩ.  Let us know if you have any other questions!

-John Sullivan
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