Consistent fertilization is only achieved at a uniform forward speed.
For example: 10 % increased speed results in 10 % underfertilization.
8.2
Implementing the calibration test
WARNING!
Risk of injury due to chemicals
Escaping fertilizer may lead to injury to eyes and nasal mucous membranes.
u
Wear safety goggles during calibration.
u
Before running the calibration test, ensure that all people leave the hazard zone of the
machine.
Requirements
•
The metering slides are closed.
•
The PTO and tractor engine are switched off and locked to prevent unauthorized starting.
•
An adequately sized collection vessel is ready for collecting the fertilizer (minimum capacity
25
kg
).
○
Determine the empty weight of the collecting vessel.
•
Prepare the calibration test chute. See
Fig. 33 Position of the calibration test chute
•
There is sufficient fertilizer in the hopper.
•
The preliminary settings for the metering slide stop, the PTO speed and the calibration test time
are specified and known from the fertilizer chart.
Select the values for the calibration test for the maximum possible fertilizer quantities. The higher
the quantity, the higher the precision of the measurement.
[1]
Calibration test chute
Fig. 33: Position of the calibration test chute
8. Calibration
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