SPRAYER CALIBRATION
SPRAYER CALIBRATION
3PT Sprayer 973PT
Page 54
SPRAYER CALIBRATION
A sprayer can only apply the proper amount
of chemicals when each component 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 complete calibration
of the machine is required at the start of each
season or when changing 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 application.
Many factors affect how much chemical is
applied such as: nozzle flow rate, chemical
circuit pressure, pump speed, and ground
speed, to name a few.
In this section, instructions are given on how
to accurately determine flow- or application-
rates and how to change them. It is
recommended that this procedure be
followed carefully so you know exactly how
much chemical is being applied.
Work closely with your chemical supplier,
nozzle manufacturer, and pest control
specialists 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.
Figure 19: Nozzles typical for a dry boom
Figure 20: Wet boom triple and single assemblies
Set 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 position. This will
ensure that there will be sufficient 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.
Controller Calibration
The controller must be set and calibrated for
your specific machine. Refer to the
Controller’s Manual and follow its Calibration
procedure. Use the same controller settings
during sprayer component calibrations as
used in the field.
The automatic controller will adjust the
chemical circuit to provide for a uniform
application rate when ground speed changes
up to + 20%. However, the system must be
calibrated to determine the application rate at
the nominal starting point.
Nozzle Calibration
Consult your dealer or the factory to
determine the type of nozzles on your
machine and their specific nominal flow rate.
To determine or set the application rate, the
flow rate of solution through the nozzles must
be known. Operate the tractor at the same
RPM and hydraulic setting as if running in the
field. Start with the chemical circuit pressure
Summary of Contents for AG SOLUTIONS 973PT
Page 1: ...973PT 120 132 3PT SPRAYER OWNER S MANUAL...
Page 2: ...820071 973PT 120 132 3PT Sprayer 2023 12 11...
Page 33: ...SAFETY SAFETY 3PT Sprayer 973PT Page 33...
Page 34: ...SAFETY SAFETY 3PT Sprayer 973PT Page 34 Main Frame...
Page 35: ...SAFETY SAFETY 3PT Sprayer 973PT Page 35...
Page 57: ...SPRAYER CALIBRATION SPRAYER CALIBRATION 3PT Sprayer 973PT Page 57 Table 3 Common conversions...
Page 58: ...SPRAYER CALIBRATION SPRAYER CALIBRATION 3PT Sprayer 973PT Page 58 Table 4 Nozzle flow rates...
