
February 2017
www.farmscanag.com
AM-74V1-4
12
Installation (Sensors)
INSTALLATION (SENSORS)
WHEEL SENSOR FOR GROUND SPEED
(Farmscan Ag Part # 1007P Kit)
The wheel sensor consists of a reed-type sensor (magnetic switch) and wheel magnet to be fitted onto any
non-driven ground wheel of the sprayer. The magnet activates the sensor as it sweeps past.
The spray controller requires at least one wheel pulse per second from the sensor.
NOTES:
In circumstances where an extremely large wheel is working at slow speeds (less than 5kph),
additional wheel magnets may be fitted at equal spacing’s.
Any sprayers that do not have a non-driven ground wheel can use a GPS speed sensor as an
alternative.
WHEEL SENSOR INSTALLATION PROCEDURE
To install wheel sensor:
1.
Bolt the wheel magnet onto the inside of the wheel in a position that allows the magnet to sweep
directly past the wheel sensor within a 5 - 10 mm clearance. Maximum clearance is 15 mm. The bolt
in the magnet can be replaced with a longer or shorter bolt as required.
2.
The magnet can be mounted anywhere in a radius from the centre of the wheel. Nearer to the hub
will ensure the best ground clearance.
3.
The sensor must be rigidly bolted to an existing structure, ideally in a protected position to face the
magnet as shown in the diagram below.
4.
If the sensor is mounted on a steered wheel, make sure the sensor moves with the steering
mechanism to maintain constant clearance between the magnet and the sensor when turning from
lock to lock.
5.
A 5m-extension cable can be purchased to connect the sensor to the sprayer loom connector
marked ‘wheel’. (Farmscan Ag Part # AC-205/5m or AC-210/10m)
6.
Use cable ties to secure sensor cable away from risk of damage or chaffing.