Fast BW500, Operation And Maintenance Manual

Page: 56 / 112

Adjust Ground Speed
Page 50
HYDRAULIC DRIVE PUMP (OPTIONAL)
Adjust Ground Speed
It will be necessary to establish travel
speed and then set flow to give desired
application rate. Always run at established
travel speed.
However, best results are obtained ground
speed is 8 - 13 kph (5 - 8 mph). Ground
speed variations in the field will automati-
cally be compensated.
Always operate at a comfortable speed.
Do not operate so fast that tool bar or tank
bounce while going through field.
Effective results require that liquid be
applied at a consistent depth in a consis-
tent manner. Machine bouncing will pre-
vent this required consistency.
Spraying Solutions Other Than Water
Since all the tabulations are based on
spraying water, which weighs 8.34 lbs. per
US gallon, conversion factors must be
used when spraying solutions which are
heavier or lighter than water. To determine
the proper size nozzle for the solution to
be sprayed, first multiply the desired GPM
or GPA of solution by the water rate con-
version factor. Then use the new con-
verted GPM or GPA rate to select the
proper size nozzle.
Example:
Desired application is 20 GPA of 28%N.
Determine the correct nozzle size as
follows:
GPA (solution) x Conversion factor = GPA
(from table)
20 GPA (28%) x 1.13 = 22.6 GPA (water)
The sprayer operator should choose a
nozzle size that will supply 22.6 GPA of
water at the desired pressure.
Tip Selection
Proper application of agricultural
chemicals is essential to good
performance. Applying the correct amount
and effectively covering the target are key
factors in proper application. Too often,
poor weed, disease, or insect control can
be traced to problems with spray
distribution along the boom.
Spray distribution refers to the uniformity
of spray coverage across the boom swath.
The goal in broadcast spraying is even
(uniform) spray distribution. Factors
affecting spray distribution include nozzle
type, spray pattern angle, nozzle spacing
and boom height. When selecting nozzles
to be used on a boom for broadcast
application, finding the correct
combination of these factors is important.
The nozzle spray angle and the height of
the boom will determine the overlap
between adjacent tips, which is critical to
uniform distribution.
Unless otherwise specified at the time of
manufacture, your sprayer is equipped
with flat fan spray nozzles having the
following characteristics:
• Volume: approximately 20 GPA at 30 psi
at 5 mph
• Spray angle: 110 degrees
•Nozzle spacing: 20 inches