ppk gives wrong value.

RE: ppk gives wrong value.

madblue — Thu, 13 Dec 2018 05:04:32 GMT

i think that device got damaged, any way i got a new ppk and tested the board. i think it gives proper values, i have measured by keeping the switch in reg position.

i will test it one more time with sw in dk position and try to follow taht.

Also it seems there is some bug in your gui, while increasing the regulator voltage to maximum though the ui, it shows unusual activities and unrealistic values. once you slightly move it from extreme end of 3.6, it comes to normal values.

RE: ppk gives wrong value.

Stian Røed Hafskjold — Wed, 12 Dec 2018 17:07:25 GMT

Sorry for the confusion. Yes, I was talking about using it for an external device. I was not aware that the user guide said to either use external or internal reg. However I've seen issues with this setup before, so I think you should try setting it in the DK position.

Anyways, a value of 30-80mA I think indicates a broken PPK.

RE: ppk gives wrong value.

madblue — Tue, 04 Dec 2018 05:37:08 GMT

In the user manual for ppk, it says either to use onboard regulator or external supply as power source while measuring from an external device.

Was your previous answer for measuring the power consumption of an external board?

RE: ppk gives wrong value.

Stian Røed Hafskjold — Mon, 03 Dec 2018 12:45:24 GMT

Yes, so in my previous answer I meant setting the switch to the DK position, not external, or reg position. The problem arises when using a different voltage than the DK. It has to match exactly, otherwise the current will vary with the voltage. So by switching it to the DK position you ensure that the voltage is correct.

If you get 80mA in the DK position I'm afraid that your PPK is broken, or you have a sort circuit somewhere. 80mA is the highest current the PPK will display.

RE: ppk gives wrong value.

madblue — Mon, 03 Dec 2018 12:14:13 GMT

Hi Stian,

Thank you for the update,

I have already tried with an external supply from a battery by changing the switch to external, but there is not much variations. it is showing around 30mA.

Also one more thing i have noticed, as the vdd decrease from 3.6 the power consumption also decreases slightly (around 5mA).

when i select dk, it shows constant 80 mA consumption. also tried to read the power consumption from dk but that was inconsistent. it was varying from -3 mA to 3 mA.

RE: ppk gives wrong value.

Stian Røed Hafskjold — Mon, 03 Dec 2018 11:52:55 GMT

When using PPK on top of the DK there are some issues with using the onboard regulator; power select switch in Reg position. Can you try again with the switch in the DK position?