Top Air TA1200, Operator'S Manual And Parts List

Page: 53 / 102

3-25
Maintenance
SPRAYER CALIBRATION
Use the following procedure to assist
with spray nozzle sizing and calibrating
the sprayer. Additional information can
be found in the spray controller owner’s
manual and also obtained from spray
nozzle manufacturers.
Note: the following procedure assumes
that an electronic spray rate controller is
being used.
•
Calibrate tractor speed
Accurate tractor speed calibration is
essential for proper spray coverage. To
correctly calibrate the tractor speed,
refer to the procedure in the spray
controller owner’s manual. In general,
this procedure will require towing the
sprayer a measured distance.
•
Determine required nozzle
size
1. Decide the typical operating speed
(in MPH) and coverage rate (in GPA)
that will be used.
2. Calculate nozzle flow:
Nozzle GPM=
*DCF = Density Conversion Factor
Example:
Speed= 8 miles per hour
Rate= 10 gallons per acre
Nozzle spacing= 20 inches
Liquid= Water
Nozzle GPM=
=
0.27 GPM
3. Select nozzle.
Choose a nozzle that will provide the
calculated GPM within the nozzle’s
operating pressure range. Typically, 2
or 3 nozzle sizes will be found that meet
the calculated GPM. However, it is
usually a good practice to choose a flow
size that lists this GPM in the mid-
portion of the nozzle’s advertised
ratings.
MPH x GPA x Nozzle spacing x DCF*
5940
8 MPH x 10 GPA x 20 inches x 1.0
5940
Density
Weight of Specific Conversion
Solution Gravity Factor (DCF)
7.0 lb/gal. 0.84 0.92
8.0 lb/gal. 0.96 0.98
8.34 lb/gal. 1.00 1.00
(Water)
9.0 lb/gal. 1.08 1.04
10.0 lb/gal. 1.20 1.10
10.65 lb/gal. 1.28 1.13
(28% Nitrogen)
11.0 lb/gal. 1.32 1.15
12.0 lb/gal. 1.44 1.20
14.0 lb/gal. 1.68 1.30