Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

Undervoltage in NI9205

Dear All,

 

I applied voltages on AI0 & AI equal to 20.3 Vpp and verified correctly on the oscilloscope at these points.  However the highest Vpp data acquired = 19 Vpp only.  A 1.3 V deviation is quite huge.  Similarly applies to all my voltage measurements (including those less than 20Vpp)wherein they are 1 V or 1++ V less than the expected measurement.

 

I verified the measurement using MAX and it yielded the same results.  There are no missing samples.  I even maxed out the sampling rate and yet I have undervoltage.   By the way, I also tried another module, NI 9201 and again the same results occurred.

 

My 9205 configuration is set to NRSE.

 

I simply can't decipher why.  How can it be fixed?

 

Thanks,

A

 

 

Message Edited by angelmcdoggie on 02-12-2009 11:33 AM
0 Kudos
Message 1 of 1
(2,839 Views)