PPK2 measures 0.58 µA max

RE: PPK2 measures 0.58 µA max

Koen Vervloesem — Sun, 09 Jan 2022 16:58:06 GMT

So I tried your suggestion to use the Source meter mode, and this works:

This shows an average current consumption of 878 µA and clear peaks of around 16 mA every 100 ms, the sample's advertising interval. Thanks for helping me in the right direction!

RE: PPK2 measures 0.58 µA max

Stian Røed Hafskjold — Fri, 07 Jan 2022 10:44:50 GMT

Hi,

Did you check with a multimeter that the SB40 is actually cut? I think it has to be either this, or the PPK is somehow broken, because it looks like there is no current flowing through the PPK. The 0.58 uA is probably just noise.

If you connect the PPK they way you are doing, there might be some noise from the USB, so actually I would expect to see around 10 uA as the lowest base current. If you want to measure the lowest idle currents, I would suggest to use the PPK in source meter mode instead. So that the power is supplied from the PPK instead of the noisy USB port. With this setup the SB40 should be soldered (or just put a jumper on the header), so then you don't need to worry about cutting the SB40 properly.

Connect the PPK VOUT and GND to the External supply header. Then flip the VExt->nRF switch to ON. Set the voltage output on the PPK to 3V. Leave the USB connected to power the debugger and the rest of the DK.

And BTW, the "enable power output" button should be turned on, even in Ampere meter mode.

RE: PPK2 measures 0.58 µA max

Koen Vervloesem — Sun, 26 Dec 2021 16:24:34 GMT

I tried all suggestions, and after leaving this for a while I tried it again and I still see the same erroneous behaviour. Can someone from Nordic Semiconductor assist me?

RE: PPK2 measures 0.58 µA max

davidz — Sun, 24 Oct 2021 15:44:26 GMT

Your connection is in Ampere mode. You may turn off the "Enable Power output" option and see if it works.

RE: PPK2 measures 0.58 µA max

Koen Vervloesem — Sat, 23 Oct 2021 17:39:57 GMT

I checked and double-checked again now, but all jumper cables are connected tightly, and I still get the same measurements.

RE: PPK2 measures 0.58 µA max

davidz — Sat, 23 Oct 2021 15:18:45 GMT

Check the cable connection. It is most likely that the cables are not connected correctly or loose.