https://devzone.nordicsemi.com/f/nordic-q-a/30021/power-profiler-kit-higher-current-with-a-custom-hardwareHi, i&#39;m developing an application with the NRF51822 device using the NRF51 development kit (DK). I bought a power profiler kit (PPK) to measure current for advertising and connection phases. When i measure current for the DK connected to the PPK,en-USTelligent Community 13Wed, 31 Jan 2018 12:52:26 GMThttps://devzone.nordicsemi.com/thread/119303?ContentTypeID=1Wed, 31 Jan 2018 12:52:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b7132fd-48b8-4ce6-987b-e665817aec77olibro<p>Thank you for the link. That&#39;s exactly what I needed to get this thing working.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/119302?ContentTypeID=1Wed, 31 Jan 2018 11:34:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e28dbcbf-cc31-4506-8a93-586133e5162bMartinBL<p>Hi,</p> <p>Please refer to the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52_dev_kit.html?cp=2_1_4">DK User Guide v1.2</a> Chapter 6.3:</p> <blockquote> <p><strong>Important</strong>: When USB is not powered, the Interface MCU is in dormant state and will draw an additional current of ~ 20 μA in order to maintain the reset button functionality. This will affect board current consumption, but not the nRF52832 current measurements, as described in the Measuring current on page 20 section</p> </blockquote> <p>In other words, if you power the kit through the External Supply header (P21) and measure the current flowing into this, then the MCU will add an additional ~20uA to your measurement. Measurements across SB9 will not include the current flowing to the MCU.</p> <p>Here is a workaround: <a href="https://devzone.nordicsemi.com/question/117747/how-to-power-the-nrf52-chip-as-standalone-without-the-dk/">How to power the NRF52 chip as standalone (without the DK)?</a></p><div style="clear:both;"></div>