i have a NI USB 6351 multifunction DAQ unit that has been working fine up uintil today. Now I am getting strange behavior. Wondering if anyone has any ideas what could be up.
I am using the Measurement and Automation explorer Test Panels to look at analog input samples. Input is configured for -10 to +10, Differnetial signaling.
My input is coming from a DC power supply. Readings look good when the input voltage is below about 1.1 volts DC. When I increase the voltage to about 1.2 VDC, the readings begin to jump to +10.5 (or so) and back to the correct value. If I continue to increas the input to around 1.4 VDC, the reading jumps to about +10.5 and stays there.
Any Ideas what may be causing this behavior?
