SPRAYMASTER 200
16
2.6 Speed Sensor Setup
Cal Mode 1 ( + Power-up ) - Channel 1
In order to display the correct speed and accumulate distance correctly, the
instrument must be programmed with the correct Speed Sensor Factor
(SSF). This is the distance travelled between pulses received from the
sensor.
The factory default setting is 2.000 m (78.78").
The S.S.F. can be calculated theoretically and then manually programmed,
or the instrument can automatically calculate it via the “Autocal” function.
Carry out the calibration whenever soil conditions or wheel sizes change.
NOTE: An ‘Autocal’ is simpler to perform and is more accurate in field conditions
2.6.1 'AutoCal'
For maximum accuracy, perform an auto-calibration in field conditions.
1. Set two markers at 100 metres apart (328 feet). Choose a convenient
reference point on the tractor/implement and position this point opposite the
first marker.
2. Press and hold the key for 5
seconds to start the 'Autocal' routine.
The display will show 'Auto' for 5 seconds,
and then show the number of received
pulses.
3. Drive the vehicle until the chosen
reference point on the tractor/implement is
opposite the second marker.
The instrument counts and displays the
sensor pulses received over the distance
travelled.
4. Press the key to end the autocal. The new factor is then displayed.
2.6.2 Manually calculating the Factor
The smaller the speed sensor factor the better the speed update will be. Aim
for a factor less than 2.000 m (78.78").
NOTE: Perform the following calculations in inches
or metres depending on whether
the instrument is set for Imperial or Metric units. If you calculate the factor
using any other unit of measurement e.g. feet or centimetres, the forward
speed display will be incorrect.
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