How to connecting the Power Profiler Kit to a computer and measuring current without an nRF5 DK?

[zhangchi]

In spec "PPK_User_Guide_v2.3.1" ,chapter " 6.6 Measuring current on custom hardware without an nRF5 DK "

I connect PPK to computer as the picture above, micro USB for power supply and J-Link for PPK connection. But the app "nRF connector-power profiler" can only find J-Link but can't find PPK device.

What may cause this problem? Is this connection method right? Or what kind of J-Link we should use? 

[Simonr]

Okay, this error is a bit more generic I'm afraid. Can you confirm that LED2 is on when the PPK is powered by the USB?

Next, I want you to power cycle the board, just remove the power source(s) and connect them again. This usually helps if I encounter "Failed to start the PPK". You might even want to restart you computer, in case the serial bus is busy for some reason.

You can also try downloading the newest JLink Driver, and change your USB cable.

Lastly, I've heard a couple of people have had an issue with their anti-virus program blocking the Power Profiler but not any other nRFConnect apps, so you could check for that as well.

Best regards,

Simon

[zhangchi]

Thank you for your reply.

When I measured 1mA current, the graph showed in Power Profiler app is very rough. And I can only see the avg current and max current.

But in the spec, PPK can measure low to 1uA.

Can Power Profiler app shows other parameter like min current? And what is meaning of switch level option in app? Can you provide the user guide of Power Profiler app?

In the spec,PPK has three test range. 1-70uA, 70uA-1mA, 1mA-70mA. How to switch three range, is it automatic?