Why is the current consumption in SYSTEM ON too high (>1mA)?

[Johnson]

I downloaded the power consumption example code to a nRF51-DK to measure the current consumption during SYSTEM ON and SYSTEM OFF state.

For the SYSTEM ON state, I used the "system-on-wakeup-on-rtc" code. The current consumption was 4.4 mA and 1.2 mA during the "normal" and SYSTEM ON states. I was expecting the current consumption to be in the order of uA during SYSTEM ON. I also changed the LF clock source to external 32.678 kHz but the result was same. I also tried the "system-on-wakeup-gpio" code and got the same results.

Any suggestions as to why the current consumption was quite high?

For the SYSTEM OFF state, I used the "system-off-wakeup-on-gpio" code. The current consumption was 4.4 mA and 0.2 uA during the normal and SYSTEM OFF state. The SYSTEM OFF current looked correct in this case.

[Wojtek]

Sorry for no answer, but could You tell me what equipment do You use to measure that range of current?