Hi all,

I have been trying to use the NI USB-6008 for voltage measurements. I observe that just by connecting the card to the circuit I am observing some signals that should not be present. Even grounding as mentioned on the National instruments website did not help. What might be the issue? I am measuring voltage drop across a circuit with impedance in the range of 150 Kilo Ohms. (Pure Resistor circuit)

Any help will be much appreciated.

Thank you very much!

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