RAC Plus User’s Manual
4-2
RAC Plus Key Functions
Your RAC Plus series DMI has been designed for simple operation, using
large individual keys which provide a click and tone feedback.
The two 6-digit high-intensity LED display windows (exclusive to the RAC
Plus series) allow exibility in displaying data to you. The upper, larger
display window (referred to as D-1) is primarily used to display distance. It
is also used to indicate menu locations and time. The lower, smaller display
window (referred to as D-2) is used to display count status, speed, interval
distance, menu descriptions, event codes (Plus II only), etc.
This is the slide switch which provides power to the RAC Plus.
When turned on, the RAC will do the following:
1. Initiate internal Self Test sequence.
2. Display calibration number in D-1 and vehicle number in
D-2, along with a 3 second tone.
3. Set itself in Count Hold with CH displayed in D-2.
4. Set the unit of measuring (feet, mile, meter) and the vehicle
number to be the last one used when the RAC was turned off.
5. Set itself to count up.
6. Set the Distance Pulse Output interval to zero.
The Count Hold key will start or stop the computation of dis-
tance pulses. When in Count Hold, CH will be displayed in
D-2 and the RAC will not accumulate any distance. If speed is
also being displayed, it will continue as CH does not stop the
computation of vehicle speed. When released, CH in D-2 will
go out and distance computation will resume.
OFF/ON
Fig. 4.1 — RAC Plus Key Layout
Count
Hold
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