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The sensor calculated output should read 0 degrees when level in
either axis. This calibration should be checked when the system is
installed and then once yearly.
To calibrate: park the harvester on level ground. Assuming that the
sensor unit has been mounted correctly, the left/right and
forward/rearward readouts should be close to 0 degrees.
Press the button. The angle sensor is then fully calibrated.
The Diagnostics values in degrees shown at the base of the screen are
the actual calculated angles of the ECU.