NRF52832 current consumption problem

[secondbest]

Hi;

I am using NRF52 DK(pca10040) board nowadays with sdk 14.0. I read a blog post about power consumption in nordic webpage.(link) In this blog post, there is a webpage to calculate average current consumption of nrf52832 devices.(link)

According to the calculation in the webpage; NRF52832 average current consumption is 67uA for 3V, 31 byte tx payload, 4dB power and 250ms advertisement interval. However, I measure 95uA for 3V, 31 byte tx payload, 4dB power and 250ms advertisement interval with nrf52 dk in real life condition(Min: 0.001mA, Max: 0.346mA Ave: 0.095mA). Also, nrf51822qfaa is consumed 107uA at the same condition(3V, 31 byte tx payload, 4dB power and 250ms advertisement interval). I used fluke 289 to measure current consumption of the nrf52 dk and nrf51.

There is a significant difference between my measurement and what the web page said.(95uA vs 67uA) Is this normal? What am i doing wrong? Any suggestions?

Thanks.

Edit..... I measured 96uA average current by using "ble_app_beacon" example code with 250ms advertisement interval. I hope it can give us a comparision point.

[AmbystomaLabs]

None of those links mention severing the swd connection. In my experience you have to do that as well. Also, the accuracy of your ammeter is crucial. I have a really expensive desktop multimeter with adjustable sample averaging and a 10mA scale. If you don't have a very good meter than an o-scope will likely give you better results.
Also you will need to find some way to calibrate your shunt resistance and make sure it really is close to your assumptions.