nRF52 DK v1.1.x

Using an ampere-meter for current measurement

Follow the instructions below to measure the current using an ampere-meter.

This will monitor the current in series with the nRF device.

  1. Make sure you have prepared the development kit board as described in Preparing the development kit board.
  2. Connect an ampere-meter between the pins of connector P22 as shown in Figure 1.
Figure 1. Current measurement with an ampere-meter
Important: An ampere-meter will measure the average current drawn by the nRF52832 if:
  • The nRF52832 is in a state where it draws a constant current, or, the activity on the device changing load current, like BLE connection events, is repeated continuously and has a short cycle time (less than 100 ms) so the ampere-meter will average whole load cycles and not parts of the cycle.
  • The dynamic range of the ampere-meter is wide enough to give accurate measurements from 1 µA to 15 mA.
  • Recommendation: Use true RMS ampere-meter.