4.2
Pinto BT-POM 1212 - Revision 5
Sprayer Calibration
Proper calibration considers all spraying variables.
Applying the correct amount of chemical
to a crop is only possible if:
• the sprayer is calibrated cor rect ly.
• the sprayer is operated cor rect ly.
• the sprayer is maintained correctly.
The variables of spray application
(distance, time, working width, liquid and
chemical volumes) must be measured and
controlled accurately to ensure chemicals
are applied at the correct rate.
The automatic spray controller measures
and controls the variables of speed and
fl ow rate to give constant application.
However proper nozzle selection, checking
calibration of nozzles, speed and fl ow rate
as well as correct mixing of chemicals
must be done to ensure the accuracy
and performance of the sprayer and its
controller.
Accurate calibration is essential to ensure
uniform application of the recommended
dose of chemical to the target.
Proper calibration involves setting up
the sprayer (nozzle selection, pressure,
speed), calculating chemical and water
rates and measuring the performance
of the sprayer itself. Only then can you
be totally confi dent in applying chemical
correctly.
Fully Automatic Spray
Controller (Optional)
The fully automatic spray controller
maintains the application rate (set by
the operator) when operated in Auto
position.
The controller monitors speed of travel
(speed sensor) and fl ow rate (fl ow meter)
and automatically adjusts fl ow rate (via a
servo valve) to maintain correct application
rate irrespective of speed variations within
the limits of the nozzles used.
IMPORTANT:
1 It should be remembered that the
spray controller does not eliminate
the necessity to measure and check
the accuracy of nozzle spray patterns
and outputs. These must be checked
regularly to ensure correct and
uniform application rates because
nozzles wear with use.
2 Flow meters used by the controller
also needs to be checked and
calibrated on a regular basis.
On the following page, you will see
how to maintain and check your
Rapid-check fl owmeter. It is
recommended you do this regularly
during the spraying season.
Calibration
Procedure
For accurate spray rate application, follow
this calibration procedure:
Step 1
Ensure Equip ment Is In
Good Work ing Order.
Tank, pump, boom, fi lters and nozzles
must be clean, free of leak ag es and
func tion ing properly.
Follow the pre-operation checklist,
maintenance and operating instructions
in this manual.
Install, calibrate and operate the spray
controller according to the spray controller
Installation/Operators Manual.
Calibration Procedure
Rapid Check Flowmeter
See the Controller Operator’s Manual for detailed
information and calibrating procedures specifi c
to you spray controller.
NOTE
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