MT 3060 User Guide 27
Accelerometer Calibration
The accelerometer undergoes an automatic calibration sequence on the first drive after any of the
following events:
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Device installation
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Software upgrade
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Vehicle battery replacement (or recharge if battery was fully discharged)
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Device auxiliary processor reset
WARNING! Failure to follow the process below could cause an undesired behavior of the motion
feature. Failure to drive straight on level ground during the automatic calibration may reduce the
accuracy of the accelerometer and have an adverse impact on events triggered by accelerometer
readings.
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Make sure the vehicle is parked on level ground prior to installing the MT 3060.
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Drive the vehicle in a straight path on level ground during the automatic calibration. An inclined
surface will put part of the gravity vector into the XY plane, which affects the acceleration
thresholds. (A 5.7 degree angle places 10% of the gravity vector into the XY plane.)
NOTE: When the vehicle passes 32 KPH, the auxiliary processor assumes that the vehicle is moving in a
straight line and determines the forward axis.
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