NI PXIe-6341 Floating Increasing/Decreasing Voltage Reading

Hi,

I am having difficulty getting a proper voltage reading on my 6341 Analog inputs.  The inputs seem to show values that don't correspond with that I expect, and the DAQ also seems to force the external voltages low, even when the inputs are all set to tri-state.

When reading with the RSE configuration (because that is how our hardware is set up), I only see an increasing voltage that increases to a random asymptote.  On other configurations, the voltage may be decreasing, or stuck at a single level (that doesn't correspond with the measured value)

Are there any solutions I could try in this situation?

Thanks,
Billy Maier