27
Storage
When the tractor and sprayer is parked, disconnect the power supply to the
Scanbox. This will stop the system from using power.
The display and control boxes should be protected from moisture and should
be removed if the tractor does not have a cabin.
Emergency operation
The system is added to a standard electric control unit without any modifi-
cations to the wiring. Should there be a problem when using the HC 2500
disconnect it from the Spray control box.
Spraying can now be continued.
Fault finding
Fault
Cause
Remedy
No start-up.
Check polarisation is correct.
Brown +
Blue -
Blinking back-light.
Poor power supply.
Check battery, cabling and
No “bip” sound at start-up.
connections.
Displayed area larger
Field was not rectangular.
than actual area.
“Tramlines” narrower than
Measure “tramline” width.
spray width.
Displayed volume larger
Pressure equalisation valve
Replace seals.
than actual volume.
leaks.
Fine tuning the flow constant - PPU
Calibration of the flow transducer is carried out with clean water but small
changes may occur when adding pesticides or fertiliser.
This will effect the final readings. This is typically noted when the volume
displayed on the display does not equal the actual known volume that was
sprayed out. The below formula can be used to
“fine tune” the flow transducer PPU.
New PPU =
Original PPU x Displayed Volume
Sprayed Volume
For example, the spray tank is filled with 2400 litres of spray liquid. When
sprayed out, the display showed a total of 2300 litres.
(Original PPU = 120.0)
New PPU =
120.0 (Original PPU) x 2300 (Displayed Volume) = 115.0
2400 (Sprayed Volume)
