Measuring current
Figure 27: Current measurement with an oscilloscope
To reduce noise, take the following actions:
• Use probes with 1x attenuation.
• Enable averaging mode to reduce random noise.
• Enable high-resolution function if available.
Use a minimum of 200 kSa/s (one sample every 5 µs) to get the correct average current measurement.
5.3 Using an ampere meter for current measurement
The average current drawn by the nRF52832 SoC can be measured using an ampere meter. This method
monitors the current in series with the nRF device.
Make sure you have prepared the DK as described in Preparing the DK on page 30.
Connect an ampere meter between the pins of connector P22 as shown in the following figure.
A true Root Mean Square (RMS) ampere meter is recommended.
To measure the average current drawn by the nRF52832 SoC:
• Ensure the average timing of the ampere meter is long (for example, 1 s or more).
• Set the dynamic range of the ampere meter wide enough to give accurate measurements between 1
µA and 15 mA.
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