Enfora MT 3050 User Manual page 30

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.
1. Make sure the vehicle is parked on level ground prior to installing the MT 3050.
2. Drive the vehicle in a straight path on level ground during the automatic calibration. An inclined sur-
face will put part of the gravity vector into the XY plane, which will affect the acceleration thresh-
olds. (A 5.7 degree angle will place 10 % of the gravity vector into the XY plane.)
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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