Glossary - SICE A 948 Manual De Instrucciones

WARNING
The indications in this table are of a general nature.
They are designed as a guideline for the user.
The applications of each type of extinguisher will be illustrated fully by the respective
manufacturers on request.

GLOSSARY

Following there is a brief description of some of the technical terms used in this manual.
Characteristic Angles
This term refers to all the angles that can be normally measured on a wheel aligner (total
front/rear toe, left/right and front/rear half toe values, left/right and front/rear camber, left/right
caster, left/right king-pin angle, and steering angle difference at 20°).
CCD
Special type of infrared sensor. It has excellent linearity.
Longitudinal goniometer
CCD sensor that measures the angles using an infrared beam that is parallel to the vehicle's axis
of symmetry. Goniometers that measure the angles between the front and rear of the vehicle.
Transverse goniometer
CCD sensor that measures the angles using an infrared beam that cuts across the vehicle.
Goniometers that measure the angles between the right and left side of the vehicle.
Clamp
Adapter from wheel and measurement sensor.
Inclinometers
Inclinometers are electronic devices that measure their angle of inclination with respect to the
vertical; they are used to measure camber, caster and king pin inclination values.
Equatorial plane
Hypothetical vertical plane that divides the wheels into two equal parts.
Turntable
This is a base mounting a disk on which the steer wheels of the vehicle are positioned.
Turntables reduce friction between the tyre and the ground to facilitate settling in of the
suspensions and to cancel measurement errors during steering turns.
The area between the disk and its base must be kept scrupulously clean.
Infrared beams (IR)
Electromagnetic waves that are invisible to the naked eye.
Sensors
Measurement instruments that are applied to the vehicle wheels to measure characteristic
angles.
Head
Synonym of sensor.
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