Fast 9553P, Owner'S Manual

Page: 57 / 87

SPRAYER CALIBRATION
SPRAYER CALIBRATION 3PT Sprayer 9553P / 9573P Page 57
3. With the tank half-full of water, drive
the tractor and sprayer through the
measured distance.
4. Record the time required to travel the
measured distance.
5. Determine the actual tractor speed
from
Table 5. Recalibration is
recommended per speed chosen.
IMPORTANT: Always operate at the
engine RPM that will be used while
spraying the field.
If the machine is equipped with the automatic
controller, the ground speed can be changed
by up to 20% without making adjustments.
However, do not decrease the throttle below
its 2/3 setting.
Area Coverage
To determine application rates, it is
necessary to know the area covered by the
sprayer per unit distance. Table 2 gives the
area for seven widths.
Table 2: Actual Sprayer coverage
Field Calibration
To verify application rates in the field, follow
this procedure:
1. Fill the tank to the neck with water
and mark the level of water.
2. Check that all screens are clean.
3. Set the chemical system pressure to
the desired value and run the tractor
at the selected engine RPM in the
selected gear.
4. Drive through the measured distance
while spraying.
5. Refill the tank to the same mark and
measure the volume used.
6. Divide the amount of liquid sprayed
by the area covered to determine the
application rate.