Erreur ! Style non défini.
Erreur ! Style non défini.
46
Determination of the required mean fertiliser output per minute:
The calibration check is usually only carried out using
one
hopper outlet. Ho-
wever, the fertiiser quantity required is calculated for both hopper outlets i.e. to-
tal working width, therefore the calculated quantity should be halved for calibra-
tion purposes.
min
/
600
)
/
(
)
(
)
/
(
kg
ha
kg
rate
n
Applicatio
m
width
Working
h
km
speed
Tractor
=
×
×
min
/
72
600
/
300
18
/
8
:
kg
ha
kg
m
h
km
Example
=
×
×
Therefore
36 Kg/min
must flow through
one
hopper outlet in 60 seconds. In or-
der to determine the correct metering slide setting, several attempts may be re-
quired. (Use values provided in the spreading charts as a guideline.)
Output figures for a selection of application rates and tractor speeds are already
provided in the spreading charts.
This calibration can also be carried out using a calibration slide rule (see be-
low).
For example:
Position the 300 kg/ha figure below the 18m figure on the wor-
king width scale and then read off the value for kg/min above 8 km/h on the
speed scale. The result shows that 72 kg/min will be the required mean fertili-
ser output from
both
shutter outlets combined.
Only by driving at the given speed consistently can the desired ap-
plication rate be achieved!
ATTENTION
e.g. 10% higher forward speed
10 % less application rate
