Power Profile Kit II measures 1.5microAmps when disconnected

Question

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?

Kazi Afroza Sultana · Accepted Answer

Hello Vladimir, 
 The second kit seems working fine. Have you tired the first kit in Ampere Meter mode ? You can try this with the first kit and see if you would get proper value like zero. 
 It is strange when both are going through the same calibration and same components; but first one is not functioning accordingly. I would like to know the device id of Both PPK2s so our team can find if there is any bug that makes deviation between two. 
 And also if you want , you can do an RMA on the first PPK2 that you have. I think we can replace that for you if the distributor has not done already. 
 Thanks. 
 
 Best Regards, 
 Kazi Afroza Sultana

Power Profile Kit II measures 1.5microAmps when disconnected

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