4 - System Setup
73
Custom Calibration of TankGauge
Calibration of the HARDI TankGauge is necessary if the factory calibration shows inaccurate. E.g. a different placed hitch
point on the tractor or other tyre mounting may result an inaccurate calculation of the tank contents.
Therefore it is recommended to begin the custom calibration with attaching the sprayer to the tractor that will be used for
spraying. Note that later changes of tractor can affect the accuracy of the TankGauge.
Preparations Prior to Calibration
The sprayer needs to be level and the fluid system hoses, valves, etc. need to be primed (filled with water) prior to calibration.
If not done, the calibration will be inaccurate because empty hoses will be filled during the calibration.
1. Park the sprayer at the normally used filling place.
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NOTE! Levelling the tractor and sprayer combination is of great importance as the accuracy is directly affected!
Assumed that the same tractor will be used after the custom calibration, it is not necessary for the sprayer to be level
itself. But for highest precision, the entire combination of tractor and sprayer must be level, i.e. placed on level ground.
HARDI recommend doing the TankGauge calibration at the normally used filling place.
2. Unfold the boom.
If not possible, alternatively attach a hose of maximum 50 mm in diameter after the flowmeter unit, to bypass the
nozzles. Larger hoses may cause inaccurate pressure measurement during calibration.
Priming Procedure
3. Fill 50 to 100 litres of water in the MainTank.
4. Engage the pump.
5. Circulate the water in order to fill suction and pressure filters. During this procedure, also check that are no leakages in
the fluid system.
6. Close the agitation valve. This must be kept closed during the calibration procedure.
7. Open the main spray ON/OFF to spray. All section valves must be open.
8. Manually set spray pressure to 5 bar by pressing or on the SetBox. This pressure
must be kept during the calibration procedure.
9. Close main spray ON/OFF to prime the bypass valve.
10. Disengage the pump.
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NOTE! The pump must be stopped before the MainTank runs empty. If it sucks air before
stopped, the steps 3-9 must be repeated.
11. Empty MainTank completely by pulling the drain valve cord.
Filling the MainTank
12. The are two options for filling the MainTank with clean water for the custom calibration:
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WARNING! Do not leave the sprayer whilst filling the tank and keep an eye on the level indicator in order NOT to
overfill the tank.
A. Filling using an external calibrated flowmeter:
1. Attach an external calibrated flowmeter.
2. Prime the filling hose and attach it to the flowmeter.
3. Set flowmeter to zero litres or read the actual value, depending on the flowmeter type.
4. Completely fill the MainTank with water, using the external calibrated flowmeter.
It is advisable to completely fill up to the tank lid, as the water level must be above nominal tank contents.
5. For later purpose note down the amount of water filled.
μ
ATTENTION! As the accuracy of the custom calibration is affected, it is of high importance that the external calibrated
flowmeter measures the correct quantity within a 2% deviation.
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