horsch Leeb 6 GS, Operating Instructions Manual, Page: 104 / 154

104
Spraying pressure, nozzle size, application
quantity, travel speed, agitator
Should the spraying pressure drop considerably
all of a sudden, the solution tank is empty.
Should the spraying pressure drop under oth-
erwise unchanged conditions, the suction or
pressure filters are blocked.
Spraying pressure and nozzle size have an
influence on the drop size and the sprayed out
fluid volume.
The higher the spraying pressure, the smaller
the drop diameter of the sprayed solution. The
smaller droplets are subject to higher, undesired
windward drifting!
Increasing the spraying pressure also increases
the application quantity - reducing the spray-
ing pressure will also reduce the application
quantity.
Increasing the travel speed while leaving both
nozzle size and spraying pressure unchanged,
reduces the spraying quantity.
Reducing the travel speed while leaving both
nozzle size and spraying pressure unchanged,
increases the spraying quantity.
The travel speed is freely selectable, based on
the automatic, area related spraying quantity
control via the spraying computer.
The agitator normally remains switched on from
filling to the end of spraying. The information
provided by the chemical manufacturer are
decisive in this respect.
Choose the required nozzle size from the spray-
ing table before starting spraying – under due
consideration
- the intended travel speed,
- the required application quantity and
- the planned spraying pressure.
→ See also “11. Nozzle selection”.
¾
Choose a slow travel speed and a low spray-
ing pressure to prevent losses by windward
drifting!
→ See also “11. Nozzle selection”.
¾
Apply additional measures for windward drift
reduction at wind speeds of 3 m/s.
→ See also chapter 8.5.4 "Measures for wind-
ward drift reduction"!
¾
Refrain from treatments at average wind
speeds in excess of 5 m/s (leaves and small
twigs are moving).
¾
Switch spraying on and off only when driving
to avoid overdosing.
¾
Avoid overdosing caused by overlapping
- in case of inaccurate joining passes from
one spray track to the next and/or
- when cornering at the headland with the
spray boom switched on!
¾
During spraying operation always keep an
eye on the actual chemical consumption in
relation to the treated area. In case of discrep-
ancies between the actual and the displayed
application quantity calibrate the flow meter,
e.g. by using the "tank method". (see operat-
ing instructions Co. Müller-Elektronik, Job
computer II).
¾
In case of deviations between the actual and
the displayed distance calibrate the distance
sensor (pulses per 100 m), (see operating in-
structions Co. Müller-Elektronik Job computer
II crop protection sprayer).
¾
Strictly clean the filters, the pump, the fitting
and the spraying lines in case of weather
dependent interruptions of the spraying op-
eration.