When I tried to use PPK II to measure the alarm current of a smoke alarm product, I found that its test results were very different from those of the power analyzer. I didn't know where the problem was. Is it because in this scenario where the instantaneous current changes very quickly, PPK Ⅱ will not be able to obtain accurate and true values due to switching between different ranges? However, when the PPK II tested constant current, the test results were more realistic. Has anyone encountered this situation? Could you share your solutions? Another question is, I found that the version released by Git hub is 1.2.0, but I bought four PPK II, and all of the version number on the back is 1.0.1. Do I need to update the FW?
PPK II Test Results
Power consumption meter test results
Connection diagram of PPK II and DUT