Great Plains 3P-FF900 Operator Manual - Manual (Page 21)

12/8/2009 500-643M
19 Preparation and Setup
Step 3
Turn on your sprayer and adjust the pressure. Op-
erate the sprayer at desired pressure and catch the
discharge in the calibration container for one
minute. Divide 128 into the number of ounces
caught to determine gallons per minute (GPM) per
nozzle. 128 fluid ounces equals one gallon.
Step 4
Determine your nozzle spacing in inches.
Example: 1 nozzle every 20 inches.
The above information will assure you of a check for
accurate application in the event there is an error in the
gauge, nozzle spacing, nozzle height, tractor speed or
nozzle wear. Since all tabulations are based on spray-
ing water, conversion factors must be used when
spraying solutions which are heavier or lighter than
water.
If sprayer is equipped with a Raven 450 or 440 Auto-
matic Rate Controller, this simple calibration procedure
will also work for verifying speed and proper nozzle
output.
All Raven 450 and 440 Control Systems require either
wheel drive speed sensor magnets or a radar speed
sensor. Calibration procedures for the speed sensor
magnets can be found in the Raven 450 or 440 manu-
al. Calculation procedures for radar speed sensors are
included with each radar unit dependent on make and
model. Make sure to follow initial programming instruc-
tions (Step 3) of the Raven manual to select either
SP1-(wheel drive sensor), or SP2-(radar sensor).
Example:
OPM (ounces per minute)
÷ 128 = GPM (gallons
per minute)
44 OPM
÷ 128 =.34 GPM
Solution:
GPA (gallons per acre) = 5,940 x GPM(per nozzle)
MPH x W (nozzle spacing)
Example: GPA = 5,940 x .34
5.05 x 20
GPA = 2020
101
GPA = 20
Field Adjustments
Boom Height
After calibrating the sprayer for the specific nozzle
that will be used at a desired pressure and tractor
speed, the main field adjustment is the boom height.
Depending on which type of nozzle is being used,
set the boom height so that the correct overlap for
that specific nozzle is achieved. If the crop canopy is
taller in some fields than others, adjust the boom
height accordingly. Refer to the Nozzle Charts in the
Application Guide to determine the height of the
boom.
Agitation Adjustments
The agitation valve is used to adjust the pressure to
the agitation nozzles in the tank. Refer to the agita-
tion gauge, and adjust the pressure to a desired rate.
Different chemicals require different agitation pres-
sures to keep the chemical in suspension. (See
chemical label)