Speed Sensors - Goldacres Prairie Pro Operator's Manual

Speed sensors

Raven automatic rate controllers can utilise a speed
reading from:
• Wheel speed sensor
• GPS receiver
• Radar speed sensor
Wheel Speed Sensor
The wheel speed sensor is fitted to the right hand
side wheel of the sprayer and uses four magnets (2
north pole red and 2 south pole black fitted
onto the rim to measure speed.
A north and south magnet must pass the sensor
before a pulse is counted. The sensor must be
mounted between 12mm & 19mm from the face of
the magnet to receive a reading. The magnets must
pass directly through the centre of the sensor face.
The speed calibration figure on the console indicates
a measurement of the circumference of the wheel
as it rolls across the ground. The wheel speed sensor
detects when the wheel completes one revolution
and the console calculates the distance the wheel
travels - therefore giving a km/hr reading.
If the ground speed display reading is incorrect
then the calibration and sensor condition must be
checked (see Chapter 11 'Troubleshooting').
e ei er
If a PS unit is fitted, PS ground speed can be
obtained and used in place of the wheel speed
sensor.
To receive a speed reading from the GPS unit a
pulsed niema string must be connected to the
speed cable of the console. The console must then
be set up to accept GPS speed. This is called radar
in the console calibration settings. When using GPS
the console speed cal figure is 2
can be fine tuned from this figure. See calibration
chapter for further information on console setup.
Radar Speed Sensor
The console can also utlise a radar signal for ground
speed reading. A 't harness' can be fitted to the
tractor radar harness to send a pulsed signal to the
console speed harness. The console must be setup
to receive speed as "Radar. "
When using a radar the console speed cal figure is
2 initially and then can be fine tuned from this
figure. See 'Console Calibration Raven SCS44 '
section for further information on console setup.
Prairie Pro Operator's Manual MY19 - REV 2
initially and then
Chapter 6 - Calibration - 19