TeeJet 844-R Speed Compensated Application Control - Manual (Page 6)

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R0
Your installation will likely vary from the example. It may be necessary to
customize the installation to accommodate your specific machine. Keep in
mind that the two magnets must be spaced an equal distance around the
wheel. The magnetic sensor must be mounted in-line with the magnets and
positioned within 1/8 inch to 3/8 inch from each magnet as they pass the
sensor assembly.
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Magnetic Wheel Sensor
After the wheel or proximity sensor is installed and the 844-R console is mounted
and powered up test the speed sensor installation. Connect the wheel speed or
proximity sensor to the sensor cable and in turn connect the sensor cable to the
844-R console. When the connections are made, rotate the wheel on which the
magnets are installed. If using a proximity sensor, you will be sensing metal
objects and not magnets. Each time a magnet (metal object for proximity sensor)
passes the sensor a red LED (orange LED for proximity sensor) on the back of
the sensor will light. The LCD display on the console will also indicate a speed as
the sensor receives and sends electronic pulses.
Radar
If a radar speed sensor is used, connect it to the speed sensor connector on the
sensor end cable. An adapter cable will be necessary when using most radars
and are available through your TeeJet 844-R dealer. The 844-R will automatically
sense if the speed sensor is a wheel speed, proximity type, or radar type sensor
during calibration. The 844-R is automatically adapted to most brands of radar
speed sensors, provided that the appropriate adapter cable is used. If using a
radar sensor, the 844-R will display rAd during the calibration procedure.