Enfora MT 3000 - Accelerometer Calibration; Figure: 18 - Typical OBDII Socket Location

Figure: 18 - Typical OBDII Socket Location
Warning: Upon vehicle ignition on, immediately following device installation, the
device starts the Accelerometer Auto-calibration process.
5.3 Accelerometer Calibration
The accelerometer undergoes an automatic calibration sequence on the first drive after any of the
following events:
l Device installation
l Software upgrade
l Vehicle battery replacement (or recharge if battery was fully discharged)
l Device auxiliary processor reset
Failure to follow the process below will cause 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.
When the vehicle passes 32 KPH, the auxiliary processor assumes that the vehicle is moving in a straight
line and determines the forward axis.
Before installing the MT3000 make sure the vehicle is parked on level ground.
The vehicle should be driven 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 will affect the acceleration
thresholds. (A 5.7 degree angle will place 10 % of the gravity vector into the XY plane.)
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