Fitting your greengauges speed sensor
PLEASE READ THROUGH ALL OF THESE INSTRUCTIONS BEFORE STARTING TO INSTALL
Please note that these instructions refer to the magnetic sensor using a reed switch - not to the magnetic proximity sensor
- The greengauges speed sensor kit consists of the speed sensor itself and 6 magnets. The installer needs to provide a suitable mounting bracket and a high quality 2 pack epoxy adhesive, with a cure time of around 24 hours.
- The principle of operation of the sensor is that it generates an electronic pulse each time a magnetic passes the sensor probe, and transmits that pulse to the electronic speedo.
- The first task therefore is to fix the magnets in the desired location, which may be directly onto the propshaft, onto the half shaft or onto the inner surface of the vehicles wheel.Wherever the location, the surface to which the magnet will be fixed must be clean and free from any contamination. The magnets can then be adhered to the desired location using the epoxy adhesive, and left to set for the time recommended by the adhesive manufacturer (greengauges strongly recommends the use of an adhesive with a minimum cure time of 24 hours).
The magnets should be equidistantly spaced around the rotating shaft or wheel. For prop shaft and half shaft application 3 or 4 magnets is recommended, for a wheel based application up to 6 magnets may be used, to increase the number of pulses per revolution.
- The sensor can then be positioned as close as possible to the magnets, using a suitable bracket for the particular installation.
N.B. It is vitally important that the sensor is mounted directly opposite the magnets as they pass its probe, any offset will result in an unsatisfactory signal. A gap of up to 1/2 inch (1.25 centimetres), between the probe and the magnet can be tolerated by the sensor, but the smaller the gap the better the signal.
- The electrical connections to the sensor should be made as follows:-
One wire should be connected to a switched positive supply, i.e. power should be off to the sensor when the ignition is off.
The second wire should be connected to the black and white wire on the harness supplied with the speedometer.
- The greengauge sensor can easily be tested for quality of signal, without the aid of special meters by connecting one wire to a positive supply and the other wire to a 12v bulb,which has an earth/ground connection. The bulb should illuminate if the sensor is working properly.
- For instructions on callibrating and installing your speedometer to match the signal being generated by the sensor please see the following link:
SPEEDOMETER INSTALLATION
|
