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Speed in MPH
Time (sec) required to travel a distance
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
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.
Seconds to
GPM
collect 1 qt
0.05
300
0.06
250
0.07
214
0.08
188
0.09
167
0.10
150
0.11
136
0.12
125
0.13
115
0.14
107
0.15
100
0.17
80
of:
200 ft
300 ft
136
205
91
136
68
102
55
82
45
68
39
56
34
51
30
45
27
41
25
37
23
34
21
31
19
29
Seconds to
GPM
collect 1 qt
0.20
75
0.23
67
0.25
60
0.30
50
0.35
40
0.40
35
0.50
30
0.60
25
0.70
20
0.80
18
0.90
17
1.00
15
DETERMINING NOZZLE SIZE AND USING CALIBRATION
CHART
STANDARD / PRECISION BOOM
Tip
PSI
GPM
Size
one
nozzle
TF-
10
0.3
VP3
20
0.4
30
0.5
40
0.6
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.
NOTE: Lower pressure settings will result in less spray drift.
EXAMPLE:
Assume tractor speed is determined to be 4 mph, nozzles are gray
(TFVP3), and desired GPA is 20 GPA. The calibration charts show
that you should set sprayer's pressure at about 20 psi in order to
apply 20 GPA.
NOTE: Optimum spray performance is achieved between 20-25 psi.
When shutting off outer tips, use the regulator valve to adjust
your boom pressure accordingly.
ADJUSTING THE SPRAYER PRESSURE
NOTE: All calibration needs to be done with clean water.
Once correct pressure setting has been determined, the sprayer
must be adjusted to that pressure setting. Before adjusting sprayer's
pressure, it is important to set tractor rpm at rate that was used to
determine tractor speed.
1. Loosen lock ring and adjust knob to desired pressure. Pressure is
displayed on gauge.
2. Once desired pressure is achieved, tighten lock ring.
3. Sprayer is now calibrated.
5
GPA
2 MPH
3 MPH
4 MPH
29.7
19.8
14.9
41.6
27.7
20.8
51.5
34.3
25.7
59.4
39.6
29.7
Gauge
Selector Lever
Lock Ring
Adjustment Knob
5 MPH
11.9
16.6
20.6
23.8
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