Hello,
I'm using a USB6212 (BNC) that I was recently able to get working to take inputs from 10 sensors thanks to somebody on these forums. (Thanks again). This DAQ only has 8 physical ports for analog inputs, and to be able to read 10, I set up ai0 and ai1 as open ended to get ai8 and ai9. I set the rest to open ended as well for consistency. DAQ is grounded to the power supply I'm using, and switches on DAQ are all set to GS per the manual. I haven't set up a VI, I'm currently just collecting readings from nimax to make sure everything was working okay and I've run into this issue.
At some voltage x (at any voltage I use, the issue is present), ai8 and ai9 are reading about 0.4 volts low, and they are much more responsive to stimuli than ai0-ai7 (more than twice the voltage increase). I grabbed a screen shot of this that I'm including, but this does not include the response, just the voltage difference when static. If I only read ai8 and ai9 without their counterparts(ai0 and ai1), the reading looks ok. When I look at them together though, the issue shows up. Also when I look at these readings on the test panel, the issue is not present (I'm assuming because I can only look at one at a time using that method).
At this point I've eliminated everything that isn't the DAQ itself, switched sensors around, etc.
Maybe someone can see if there's something I'm missing, or some setting that I haven't been able to find.
Thank you in advance.
