https://devzone.nordicsemi.com/f/nordic-q-a/68589/where-does-the-current-offset-of-my-nrf52-dk-comes-fromHello, I try to measure the current of the nRF SoC on my NRF52-DK, by using an oscilloscope and USB as a power supply, related to the guide from Nordic from here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf52832_dk%2FUG%2Fnrf52_DKen-USTelligent Community 13Fri, 20 Nov 2020 15:22:37 GMThttps://devzone.nordicsemi.com/thread/281156?ContentTypeID=1Fri, 20 Nov 2020 15:22:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:beb612fb-1b85-41c1-8c60-306fcd81c3c9JONATHAN LL<p>Hi Daniel,<br /><br />Is this the guide <a href="https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_meas_oscilloscope.html?cp=4_2_4_5_6_1">https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_meas_oscilloscope.html?cp=4_2_4_5_6_1</a>, you meant to link to?<br /><br />How did you initiate <strong>system of mode</strong>(shutdown mode) and are you sure it is in that state?<br /><br />Here is a link to the <a href="https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_meas_current.html?cp=4_2_4_5_6">measuring current</a>&nbsp;section, the following is noted about using the USB:</p> <hr /> <p><span>Note:</span><span>&nbsp;When measuring the current consumption:</span></p> <ul> <li><span style="background-color:rgba(255, 255, 0, 1);"><strong>Do not use the USB connector to power the DK</strong></span> during current measurements. Power the DK from a coin cell battery, or use an external power supply on the External Supply connector<span>&nbsp;</span><span>P21</span>.</li> <li>The current measurements will become unreliable when a serial terminal is connected to the Virtual COM port.</li> <li>After programming the nRF52832 device, the <span style="background-color:rgba(255, 255, 0, 1);"><strong>USB must be disconnected and the development kit power cycled</strong></span> to reset the debugger chip before current measurement.</li> </ul> <hr /> <p><br />Can you try again with a different power source and see if the results persist?<br /><br />Regards,<br />Jonathan</p><div style="clear:both;"></div>