The current measurement values ​​of the Fluke equipment and the PPK2 are very different.

[jooyeol]

After purchasing the PPK2, I connected the Fluke287 and PPK2 Ampere meter in series to check whether the measured values ​​matched the Fluke equipment. 

The Fluke287 consistently checked 37uA, but the PPK checked about 3uA, so the difference is too big. What is the reason?

[Charlie]

Hi Jooyeol,

Can you show a picture of your setup?

Best regards,

Charlie

[jooyeol]

I can`t take picture so I attached the circuit diagram I tested.

in this case, Fluke287 consistently checked 37uA but PPK2 checked about 3uA.

so... I tried another simple test. 

When I use 1Mohm, Fluke checked 1uA that is correct.

but PPK2 checked 500nA ~ 800nA shaked that is incorrect.

When I use 1kohm, Fluke checked 1mA that is correct.

but PPK2 checked 25uA. it`s too low.

is there something wrong with the software setting? All the settings in the PPK2 software are default

[Charlie]

Hi Jooyeol,

Thanks for sharing the information.

I'm not sure if this is related to the connection or Power Profiler configuration. Could you verify using the following connection and configuration:

Another possibility is that the PPK2 itself has an issue. If possible, could you try with a second unit to confirm?

Best regards,
Charlie

[jooyeol]

This is correct picture below

and then I selected Ampere meter. not Source meter.

I already checked Source meter`s Accuracy has no problem.

and I don`t have second unit.

[Charlie]

I think PPK2 GND should share the same GND with Power Supply. Could you try connect their GND?

Best regards,

Charlie