Electro-Mechanical Ear
A device used much like a doctor’s stethoscope and is for noise diagnosis problems only.
Force Matching™
A method of aligning the high spot of the tire’s radial force variation with the low spot of
rim runout to decrease rolling vibration in the wheel assembly.
Forced Vibration
Vibrates when energy is applied.
Free Vibration
Continues to vibrate after the outside energy stops.
Frequency
The number of disturbances that occur per unit of time.
Front Coning
When the wheel requires the cone to center the wheel on the balancer’s shaft from the
front. Also referred to as Front-Cone Mounting.
Harmonic
A vibration that is identified by the number of occurrences per revolution. For example, a
1st harmonic vibration has a once per revolution vibration component.
Hertz
A unit of frequency: one disturbance per second.
Hub Centric
The wheel is centered using the center hole of the wheel.
Inflation Station
A feature on newer models of the GSP9200 that automatically inflates or deflates tires to
a predetermined air pressure.
Lateral Runout
The amount of side-to-side movement as the tire/wheel assembly rotates.
Lug Centric
The wheel is centered using the lugholes rather than the wheel center hole.
Magnitude (Amplitude)
The amount of force or the intensity of the vibration.
MatchMaker™
Allows the operator to match up four identical tires on identical rims, to achieve the
optimal combination of match mounting.
Natural Frequency
The point at which an object will vibrate the easiest.
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7. Glossary GSP9200 Series Wheel Balancer Operation Instructions
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