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U3 HV with ±2.44 Differenctial mode

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#1 raul.suarez.marin

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Posted 25 April 2013 - 01:57 PM

Hello everyone, I'm trying to find how can I configure my U3 HV for inputs with ±2.44 V in differential mode (obvious) and in which ports I can do that. I know it's pseudobipolar, so I'll do some corrections to my circuits and I'll try to give a try. I hope this is an easy question! Kind regards, Raśl

#2 LabJack Support

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Posted 25 April 2013 - 03:31 PM

Normally the negative channel is 199, which means single-ended (i.e. the positive channel is measured versus ground). Differential means you want the negative channel to be something other than ground, and on the U3 it can be any channel:


How you specify the negative channel depends on the software you are using.

Here is an app note about differential analog inputs:


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