I'd like to use Power Profiler to measure really low currents (watches) ~0.4 microAmps.
However, Power Profiler II measures 1.5microAmps even when disconnected with or without voltage supply.
I've tried using Advanced Settings to reduce gain for R1 but even with lowest setting (0.9) the kit measures 1.3 microAmps when disconnected.
Is there way to calibrate/reset the device to make sure it has true zero?