Compass calibration should be performed before beginning measuring in a new site. This is especially important if previous calibration was done far enough so that the Earth's magnetic field is different. While performing the calibration keep away from any potential sources of magnetic interference such as buildings and vehicles.
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From the measuring module view, touch and hold the the unit you want to calibrate. Select "Compass calibration" from the popup menu.
The calibration wizard starts. -
Familiarize yourself with the movement shown by the animation. Click Start when you are ready to perform the movement for about 30 seconds.
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Carry through the movement until the animation stops.
If the calibration wizard detects insufficient movement, the calibration is rejected.
When calibration is successfully completed, you'll see "Calibrated" message. You can now close the calibration wizard.
