User's Manual

22 • 3. Compensating Sensors DSP500 Series Wheel Alignment Sensors
Procedure Limitations
CAUTION: This procedure must be performed carefully, or inaccurate
alignment measurements will result. The axles must always
“point” exactly the same direction as the vehicle rolls during the
procedure. A change in the pointing direction of an axle during
the procedure will be interpreted by the system as runout.
1. Do not allow the front wheels to change their “steering” direction
as the vehicle is rolled.
2. Do not perform the procedure on a bumpy or uneven surface.
3. Do not perform the procedure on a vehicle that has uneven or
out-of-round tires.
4. Do not push or pull the vehicle by the tires or wheels during the
procedure.
5. Push the vehicle only forward during the procedure. Do not push
the vehicle forward, then backward.
6. Do not use the brakes during the procedure.
3.5 Compensation Recall Mode
If sensor power is temporarily interrupted after compensation, a short-term backup
memory on the sensor may hold compensation values until power is restored. When
power is restored, the sensor will indicate that it has valid compensation values by
illuminating the green compensation indicator while flashing the red compensation
indicator. If the sensor has not been dismounted from the vehicle wheel, the
compensation procedure does not have to be repeated. Compensation can be restored
by unlocking the lock knob and tilting the sensor in either direction until the red indicator
stops flashing and stays on. Afterwards, restore the sensor to its original position. If re-
compensation is required, pressing the compensation button twice within four seconds
will retake the first reading for that sensor. Refer to the compensation section for
complete compensation procedure.