Jamar RAC Geo II, User Manual, Page: 42 / 60

RAC Geo II User’s Manual
4-4
Installation
Note: This section only applies to users who are using an external distance
sensor (such as modular or magnetic) for distance measuring rather than
the RAC Geo's internal GPS sensor.
Before You Begin
The JAMAR RAC Geo II distance measuring instruments are very reliable
and highly accurate when used with an external distance sensor. However,
when using an external sensor there are some known issues that could affect
proper operation and the ability to accurately measure distance traveled. By
observing a few simple precautions you will be able to eliminate potential
problems.
•
Do not
install wires near any object that could cause stray pulses to
be picked up, such as the alternator, spark plugs or engine coil.
•
Do not
install the wires or sensor near any objects that will get hot,
such as the manifold. The installation wires or sensor can melt if they
are too close to a heat source.
• Do not install wires near any objects that could vibrate and cut the
wires.
• Tire pressure should be the maximum suggested by the tire manufac-
turer, typically 32-35 PSI cold. The tire should have ample tread depth.
Steel belted radial tires are highly recommended.
• Drive the vehicle 3 to 5 miles (depending on climate) to warm the
tires up to normal operating temperatures prior to calibrating your RAC.
Refer to the calibration section later in this chapter for more detailed
instructions.