User's Manual

DSP500 Series Wheel Alignment Sensors 3. Compensating Sensors • 17
3. COMPENSATING SENSORS
3.1 General Compensation
The sensors must be compensated to eliminate errors in angle measurements caused by
runout of the wheel, wheel adaptor, and sensor shaft.
The default setting for the alignment console can be set for either 2 or 3-point
compensation. However, the operator still has the option to override the default setting by
pressing the “2-Point” or “3-Point” Compensation softkey on the “Compensation Control”
screen on the aligner console.
The sensors must be “ON” to compensate.
If a previously compensated sensor should require re-compensation, pressing the sensor
compensate button twice within four seconds will retake the first reading for that sensor.
Do not disturb the sensor until the red LED responds.
Sensors may be compensated in any order; however, these precautions must be followed:
If a sensor is removed from a wheel, that sensor must be re-compensated when
reinstalled. The other sensors do not need re-compensation.
During 2-point compensation and normal operation, be certain no obstructions are
blocking the infrared beams between the sensors. Should a blockage occur, the
affected sensor(s) shown in the illustration on the CRT will flash on and off and the
displayed toe measurement of the sensor(s) will go blank until the obstruction is
cleared.
When compensating sensors that are mounted to the vehicle drive wheels, place
the transmission in NEUTRAL.
The lift/rack should be level on the leveling legs.
3.2 3-Point Compensation
All sensors need not be mounted before starting compensation. The sensors may be
mounted and compensated individually, or compensation may be performed on 1, 2, 3, or all
4 sensors at once.
Raise either the front or rear axles, or both, while remembering to use the safety on all
jacks.
WARNING: If only one axle is raised, chock wheels on the axle that is
not being raised during compensation, to prevent the
vehicle from rolling.
Turn sensors on if necessary and select any one of the sensors for compensation. The
starting position of the wheel adaptor does not matter. The green LED will be on.