NI 9234 Channel Config

[BillyM]

I have an NI 9234 inside of a cDAQ, and I was wondering:

Can I configure each channel individually, while measuring both simultaneously?

I want to have the 2mA excitation enabled on one channel, but not the other as I read/compare the two signals simultaneously.

So far, I have to choose to enable/disable both on a property node, and that is not what I need.

Thanks,

Billy Murphy

[BillyM · Accepted solution]

I figured I'd share this email I got back from a very helpful employee at NI 🙂

- Billy

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William,

You sure can! Please take a look at this article:

http://digital.ni.com/public.nsf/allkb/3AD6CCE935192B4086256F6B0079CB1F?OpenDocument

The last paragraph is most relevant: If you would like to have different settings on a per channel basis, the best thing to do is to create a DAQmx channel of different measurement types for each one of your different settings. These different DAQmx channels can still be used within a single DAQmx task. For example, if you have three microphone inputs and one voltage inputs, you can create a microphone measurement type and a voltage measurement type using the DAQmx Create Channel VI. The microphone channel will be associated with three physical channels while the voltage channel will be associated with one. The voltage channel can have different gain settings, scaling factors, coupling, or IEPE properties compared to the microphone channel.

Regards

Katie Maddox

Applications Engineer

National Instruments

http://www.ni.com/support

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[BillyM]

I'd also like to make a final reference to here, if anybody is curious on accomplishing this task.

http://zone.ni.com/devzone/cda/epd/p/id/4524

As far as implementation goes, I found this to be a neat idea:

http://forums.ni.com/t5/LabVIEW/Setting-up-IEPE-settings-DAQ-MX-task-for-multiple-channels/td-p/1728...

- Billy