Field adjustments – Great Plains TSF660 Operator Manual User Manual
Page 24

TSF660
500-644M
9/1/2009
22
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 440 Automatic
Rate Controller, this simple calibration procedure will
also work for verifying speed and proper nozzle output.
All Raven 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 440 manual. Calculation
procedures for radar speed sensors are included with
each radar unit dependent on make and model. Make
sure to follow initial programming instructions (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)
Tank Straps
The tank straps that wrap around the sprayer tank
may become loose after the first few hours of opera-
tion. This occurs when the tank settles in the saddle.
Polyethylene tanks are especially susceptible to this.
Retighten the tank straps to secure the tank.