5CS2004OM (rev 00 07/2020) 16
determine speed:
1. Measure a 200 or 300 foot distance on a
field or surface similar to where sprayer will
be used.
2. Drive tractor with half-full sprayer across
measured distance at a constant and
comfortable speed for spraying. There can
be no changes in speed while measuring
time.
3. Determine amount of time, in seconds, it
takes to travel the measured distance.
4. Speed can be determined by entering data
into the following equation: speed (mph) =
(distance (ft) x 60) / (time (sec) x 88) or by
consulting the following table
Speed
in MPH
Time (sec) required to travel a distance
of:
200 ft 300 ft
1.0 136 205
1.5 91 136
2.0 68 102
2.5 55 82
3.0 45 68
3.5 39 56
4.0 34 51
4.5 30 45
5.0 27 41
5.5 25 37
6.0 23 34
6.5 21 31
7.0 19 29
NOTE: If using boomless nozzles, use the
Boomless Nozzle Calibration Chart.
Useful Formulas
GPA = Gallons per Acre
GPM = Gallons per Minute
MPH = Miles per Hour
GAL/1000 sq ft = Gallons per 1000 sq ft
W = Nozzle spacing in inches
GPM Per Nozzle = GPA x MPH x W / 5940
GPM Per Nozzle = GAL/1000 sq ft x MPH x W
/ 136
GPA = 5940 x GPM (Per Nozzle) / MPH x W
GPA = Gallons per 1000 sq ft / 0.023
GAL/1000 sq ft = 136 x GPM (Per Nozzle) /
MPH x W
NOTE: Replace worn tips that have a streaky or
uneven pattern.
GPM
Seconds to
collect 1 qt
GPM
Seconds to
collect 1 qt
0.05 300 0.20 75
0.06 250 0.23 67
0.07 214 0.25 60
0.08 188 0.30 50
0.09 167 0.35 40
0.10 150 0.40 35
0.11 136 0.50 30
0.12 125 0.60 25
0.13 115 0.70 20
0.14 107 0.80 18
0.15 100 0.90 17
0.17 80 1.00 15
Determining Nozzle Size and Using
Calibration Chart
STANDARD / PRECISION BOOM
Tip
Size
PSI
GPM
one
nozzle
GPA
2 MPH 3 MPH 4 MPH 5 MPH
TF-
VP3
10 0.3 29.7 19.8 14.9 11.9
20 0.4 41.6 27.7 20.8 16.6
30 0.5 51.5 34.3 25.7 20.6
40 0.6 59.4 39.6 29.7 23.8
The spray nozzles on your sprayer are TF-VP3,
which match up with the calibration chart. Refer
to the calibration chart. Using tractor speed,
nozzle size, and desired gallons per acre
(GPA), find pressure (psi) necessary to achieve
your GPA.
Operation
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