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How to initialise DAQ cards prior to AI_Vread?

I have a problem when i use the AI_Vread function. It appears to me that the i need to initialise my daq card before it can start to pick up the readings from my voltage source. Please advise me!!!
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Hello;

You can refer to one of the shipping NI-DAQ examples code. For your case, I believe you can look at the one named "AIOnePoint.c"; which can be found at C:\Program Files\National Instruments\NI-DAQ\Examples\VisualC\AI.
Hope this helps.
Filipe
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