Jamar RAC Plus I Bedienungsanleitung
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RAC Plus I User’s Manual
RAC Plus I User’s Manual
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WARNING
Use of the RAC Plus I while driving could cause an accident, resulting in serious injury
or death. As with any in-vehicle instrumentation, the information provided by the RAC
Plus I should be observed as part of the normal operation of the vehicle. Changes to the
RAC Plus I should only be done in a safe manner.
Installation of the RAC Plus I and distance sensor should be done with caution so it
does not cause unsafe conditions.
DO NOT mount the RAC Plus I where it will obstruct the driver's view.
DO NOT mount the RAC Plus I over or near an air bag.
DO NOT route cables in a manner that would interfere with operation of the vehicle.
LIMITED WARRANTY
JAMAR Technologies, Inc. warrants the RAC Plus I for a period of five (5) years limited
warranty against defects in material and workmanship as follows: first year, parts and
labor; years two through five, parts only, flat labor charge. Sensors, cables, connectors,
brackets and other hardware are warranted for ninety (90) days.
JAMAR Technologies, Inc. warrants each new instrument manufactured by the company
to be free from defective material and workmanship and agrees to remedy any such defect.
At its option, it may furnish a new part in exchange for any part of any instrument of its
manufacture which, under normal installation, use and service discloses such defect. The
instrument must be returned to the JAMAR factory or authorized service agent intact,
for examination, with all transportation charges prepaid.
This warranty does not extend to any products which have been subject to misuse,
neglect, accident, incorrect wiring not our own, improper installation or use in disregard
of instructions furnished by JAMAR. This warranty does not extend to products which
have been repaired or altered outside the JAMAR factory or authorized service agent.
In no event shall JAMAR Technologies, Inc. be liable for any damages arising from the
use of this product including damages arising from the loss of information.
This warranty is in lieu of all other warranties expressed or implied and no representative
or person is authorized to assume for JAMAR Technologies, Inc. any other liability in
connection with the sale or use of JAMAR products.
JAMAR Technologies, Inc. reserves the right to make improvements on the product and/
or specifications at any time without notice. Questions concerning this warranty or any
JAMAR Technologies, Inc. product should be directed by e-mail, mail or telephone to:
JAMAR Technologies, Inc.
1500 Industry Road, Suite C, Hatfield, PA 19440
215-361-2244 • [email protected]
Copyright 2012 by JAMAR Technologies, Inc.
iii
Table of Contents
Volume 2.4 November 2012
If you have any questions about the use of the RAC Plus I, please call the
following number:
1-215-361-2244
Monday — Friday, 8:00 AM to 5:00 PM Eastern time
You may also contact us by e-mail at:
For more information on our products, or for the latest news in product
development, visit our web site at:
www.jamartech.com
For support information specific to the RAC Plus devices, go to:
www.jamartech.com/RACPlusSupport.htm
Address any correspondence to:
JAMAR Technologies, Inc.
1500 Industry Road, Suite C
Hatfield, PA 19440
We are pleased that you have chosen the RAC Plus I for your distance measuring
needs. We have strived to develop a unit that is easy to use and has the options that
our customers require. The RAC Plus I has undergone extensive testing to verify
the accuracy of its operations, and each unit is tested before it leaves our facility.
However, just like other complex electronic devices, problems can occur. We always
suggest that users verify the continuing accuracy of any device they use. Should you
detect any problems with any of our products, please notify JAMAR Technologies
immediately and discontinue use of the unit until we have verified its operation.
RAC Plus I User’s Manual
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Table of Contents
Technical Support ........................................................... iii
Quick Start Guide .............................................................v
Introduction to the RAC Plus I ......................................................... 1-1
What is the RAC Plus I? ......................................................... 1-2
How Does It Work? ......................................................... 1-3
Installation ......................................................... 2-1
Before You Begin ......................................................... 2-2
Installing the OBD Distance Sensor ....................................... 2-3
Installing the Modular Distance Sensor .................................. 2-6
Installing the Magnetic Distance Sensor .............................. 2-10
Installing the RAC Instrument .............................................. 2-15
Calibration ......................................................... 3-1
Automatic Calibration Procedure ........................................... 3-2
If Your RAC Fails to Calibrate ................................................ 3-5
Manual Calibration Procedure ................................................ 3-7
Key Functions & Operating Procedures .......................................... 4-1
RAC Plus I Key Functions ...................................................... 4-2
RAC Plus I Menu Functions ................................................... 4-5
RAC Plus I Additional Features ............................................ 4-10
Troubleshooting ......................................................... 5-1
Frequently Asked Questions ................................................... 5-2
Appendix ........................................................ A-1
RAC Plus I Specifications ...................................................... A-2
Power Connection Wiring ...................................................... A-3
Glossary ........................................................ A-4
Vehicle Calibration Record .................................................... A-6
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Quick Start Guide
The RAC Plus I DMI will allow you to accurately measure distance quickly
and easily. However, before you can do this a few basic steps must be taken
to ensure that you get the optimum performance from your instrument.
Step 1
Install your RAC and its distance sensor. Refer to Chapter 2 for detailed
instructions on this. If you would like to have the equipment professionally
installed, contact a garage or speedometer shop in your area.
Step 2
Calibrate your instrument. Refer to Chapter 3 for detailed instructions on
how this is done. Your RAC will not accurately measure distance unless
it is properly calibrated.
Step 3
Perform a test measurement with your vehicle. Once your RAC has been
calibrated, you should perform a test measurement over a known distance.
This will ensure that the instrument has been calibrated correctly.
To do a test measurement, drive to your starting point and stop. Turn on the
RAC and wait until zero is shown on the larger, upper display and CH is
shown on the smaller, lower display. Next, press the CH (count hold) button
to release the instrument from count hold and then drive the distance to be
measured. Stop and/or press the CH button once you reach the end of the
distance to be measured.
Step 4
Familiarize yourself with the features and options of the instrument that
you will be using. Refer to Chapter 4 for more detailed instructions on the
functions and procedures of the RAC Plus I.
Step 5
Practice. Before attempting to use the instrument on a job, be sure you are
comfortable with how to operate it.
RAC Plus I User’s Manual
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1-1
Chapter 1
Introduction
to the
RAC Plus I
Chapter 1 — Introduction to the RAC Plus I
RAC Plus I User’s Manual
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What is the RAC Plus I?
The JAMAR Technologies Road Analysis Computer (RAC) Plus I is an
accurate, easy-to-use distance measuring instrument (DMI) that uses state-
of-the-art microprocessor technology. It has been designed with features to
provide you with a versatile and functional instrument that can be learned
in a very short time.
Fig. 1.1 — RAC Plus I Distance Measuring Instrument
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How does it work?
The RAC Plus I is installed in your car along with a distance sensor.
Distance sensors do the behind-the-scenes work of the RAC Plus distance
measuring instruments. Connected between your vehicle and the RAC Plus
head unit, these sensors read and modify the data coming from your vehicle
and send a signal to the RAC telling it when to count distance.
There are currently three types of distance sensors that are used with the
RAC Plus I – the AutoLink OBD sensor, the modular sensor and the mag-
nectic sensor.
Why are there three types? Because distance measuring instruments are
used by a wide variety of customers who often have different needs and in
a wide variety of vehicles that don't all work the same.
The simple breakdown of the three is that the AutoLink sensor is the new-
est and easiest to install (plug and play, no tools required), but that ease of
install trades a degree of accuracy. The magnetic sensor is the most precise,
but much more intensive to install than the AutoLink, while the modular
sensor has accuracy similar to that of the magnetic sensor and is somewhat
easier to install, but is not compatible with all vehicles.
The next chapter details how to install these various sensors into your
vehicle. If your already have a sensor installed, you may skip to Chapter 3
for information on calibrating your RAC.
Chapter 1 — Introduction to the RAC Plus I
RAC Plus I User’s Manual
1-4
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