Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

USB-6008 Measurment Accuracy?

Hi, I have a 2.0VDC signal run into this board with Pin 1= GND and Pin2=2VDC. When I perform a mesurement, I read out +.5VDC?? I'm running the sample application fro the NI-DAQ CD called ContAcq-IntClk.c.
 
Why is there ~1.5VDC offset?
 
rjmiller
0 Kudos
Message 1 of 4
(2,927 Views)
Hi RJ-
 
The problem you're seeing is discussed in this KB.  Basically, you are wiring your input in an RSE terminal configuration so you need to indicate that explicitly in your code with the DAQmxCreateAIVoltageChan function.
 
Thanks-
Tom W
National Instruments
0 Kudos
Message 2 of 4
(2,922 Views)

That'll do it - thanks Tom.

 

rjmiller

0 Kudos
Message 3 of 4
(2,920 Views)

Hi RJ-

Glad I could help- keep us posted if you run into any other problems.  Thanks a lot-

Tom W
National Instruments
0 Kudos
Message 4 of 4
(2,911 Views)