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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 Scanbox 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
modifications to the wiring. Should there be a problem when using the
HC 2500 disconnect the Scanbox from the control unit and connect the
cable from the control unit to the control box.
Spraying can now be continued.
Fault finding
Fault
Cause
Remedy
No start-up.
Check polarisation is correct.
Check the fuse in the Scanbox.
Change fuse. (use 1.25 T Amp).
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)
