PAGE 54
SPRAYER CALIBRATION
A sprayer can only apply the proper
amount of chemicals when each compo-
nent in the system is functioning properly.
Chemical action in the field is dependent
upon the accurate application of minute
amounts of the spray compound. A com-
plete calibration of the machine is required
at the start of each season or when chang-
ing chemicals during the spray season.
It is the responsibility of the customer to
determine the amount of chemical that
they want to apply for their particular appli-
cation. Many factors affect how much
chemical is applied such as, nozzle flow
rate, chemical circuit pressure, pump
speed, ground speed to name a few. In
this section, instructions are given on how
to accurately determine flow rates or appli-
cation rates and how to change them. It is
recommended that this procedure is fol-
lowed carefully so you know exactly how
much chemical is being applied.
Work closely with your chemical supplier,
nozzle manufacturer, and pest control spe-
cialists to equip and operate your machine
to obtain the best results. Several nozzle
types are available for the sprayer. Use
the type appropriate for your application.
Engine RPM
Although the exact value of the engine
speed is not particularly important to
sprayer function, it is recommended that it
always be set at 2/3 or more throttle posi-
tion. This will ensure that there will be suf-
ficient oil flow through the hydraulic
system and sufficient power to maintain
the ground speed.
Select the desired engine RPM and
always perform the calibration and run in
the field at the same setting.
If your sprayer is equipped with a PTO-
driven pump, run the engine RPM to
achieve the 540 PTO RPM.
Automatic Controller Calibration (If
equipped)
The controller must be set and calibrated
for your specific machine. Refer to the
Controller manual and follow its Calibra-
tion procedure. Use the same controller
settings during sprayer component cali-
brations as used in the field.
Ground Speed Calculation
For optimum spraying results, it is import-
ant 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 speed-
ometer 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 distance of 100, 200 or 300
feet in the field to be sprayed (longer
distances provide greater accuracy).
2. Place the tractor in the gear to give a
speed between 6 and 8 mph (9.5 and
13 kph) and at the selected engine
RPM.
3. With the tank 1/2 full of water, drive the
tractor and sprayer through the mea-
sured distance.
4. Record the time required to travel the
measured distance.
IMPORTANT: Always operate at the
engine RPM that will be used while
spraying the field.
Summary of Contents for UT3P
Page 1: ...820037 FAST UT3P Sprayer 9 20 2018 FAST UT3P Sprayer OPERATION AND MAINTENANCE MANUAL...
Page 2: ...820037 FAST UT3P Sprayer 9 20 2018...
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Page 19: ...MAJOR COMPONENTS PAGE 16 This page intentionally left blank...
Page 45: ...OPERATION PAGE 42 This page intentionally left blank...
Page 61: ...PAGE 58 This page intentionally left blank...
Page 83: ...820037 9 20 2018...
Page 84: ...820037 9 20 2018...
