FAST AG Solutions 973PT, Руководство пользователя

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SPRAYER CALIBRATION
SPRAYER CALIBRATION 3PT Sprayer 973PT Page 55
at 20 PSI. Increase or decrease pressure as
required to obtain the desired flow rate.
CAUTION: Never calibrate nozzles
with active chemical in the tank. The
solution can contaminate people, the
workplace, and the environment.
NOTE: If the Controller cannot
produce the required pressure in the
chemical circuit, decrease the
agitation flow to reset the system and
try again.
NOTE: Measuring the flow rate for
each nozzle will ensure a consistent
and uniform spray pattern across the
entire machine.
1. Remove all the nozzles from the
Sprayer.
2. Use clean water to wash each nozzle
and the check valve.
3. Reinstall the nozzles in the booms.
4. Add clean water until the tank is half
full.
5. Place a calibration cup under all the
nozzles on each boom. Calibration
cups are available from most
agricultural offices or weed
supervisors.
6. Run the tractor at the RPM selected
for field operation. Operate the
chemical circuit pump at the desired
pressure and measure the time that it
takes to spray 1.0 quart (0.95 liters)
through each nozzle. Use Table 4 to
determine a per nozzle flow rate.
7. Replace all nozzles giving more than
110% the nominal flow rate.
8. Clean all nozzles components from
nozzles less than 90% the nominal
flow rate, and then recheck them.
Machine Yard Calibration
After the nozzles have been calibrated, it is
recommended that the entire system be
calibrated. A yard run is the simplest method
to determine the total volume delivered. To
calibrate in the yard, follow this procedure:
1. Fill the tank full of water (no
chemicals.)
2. Check that all screens are clean.
3. Set the chemical system and boom
pressure to the desired value and run
the tractor at the selected engine
RPM.
4. Spray in a stationary position for a
known period of time.
5. Refill the tank and accurately
measure the amount of water used.
This will give the amount of spray
used per time.
The total volume can be changed by
increasing or decreasing the chemical
system pressure. However, if a change is
made, it is recommended that the entire
system be calibrated again to determine the
new volumes.
Ground Speed Calibration
For optimum spraying results, it is important
to maintain a known, constant speed to spray
the required chemical over a given area.
Because of wheel slippage, the operator
cannot rely on the tractor speedometer
reading to give the value of true ground
speed. The unit must be timed over a known
distance to determine true ground speed.
To calibrate, follow this procedure:
1. Mark off a distance of 100, 200 or 300
feet (328m, 656m, 984m) in the field
to be sprayed (longer distances
provide greater accuracy).
2. Place the tractor in the proper gear
for a speed as recommended in Table
1 and at the selected engine RPM.
Always operate at the speed
appropriate for the conditions.
Table 1: Recommended application speeds
Plant type MPH KPH
Cereal
(Broadcast)
6 – 12 9.7 – 19
Row Crops 5 – 10 8.1 – 16
General 6 – 8 9.5 – 13