VI. CALIBRATION CALIBRATING YOUR SPRAYING SYSTEM It is important to apply chemicals as recom-
For help in determining the nozzle spacing and
mended by the manufacturers of the product. In
height of boom, refer to the spray product catalog
order to do so, the spraying system must be
that accompanies this manual. There are several
properly calibrated. Determine the speed at which
types
the sprayer will be driven while applying chemicals.
recommended by the catalog) and install the type
To select the best speed, consider the lay of
and size of nozzles best suited for the intended
the land, the condition of the soil, the type of crops,
spraying job. The type and size of nozzles selected
the height of the crops, etc. Select the nozzle
will depend upon the speed the sprayer will travel,
spacing (distance between each nozzle on the
the nozzle spacing, and the number of gallons one
spray boom) best suited for the intended spraying
intends to apply per acre.
and
sizes
of
nozzles.
Select
(as
job.
IMPORTANT: DO NOT ADD CHEMICALS UNTIL CALIBRATION IS COMPLETED.
VERIFYING CALIBRATION Check with manufacturer on recommended
switches. Make sure there are no leaks and that all
spray pressure. To test your system, fill the solution
nozzles are spraying a desirable pattern. Continue
tanks with clean water. Do not add chemicals until
spraying in the stationary position for at least 10
calibrated and verified.
minutes for proper warm-up of the sprayer and its
With brakes applied, start the engine of the sprayer; throttle the engine to operating speed and remain parked. Turn on all boom section solution
system. Catch one nozzle’s spray for one minute in an adequately sized and marked container.
