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Toll-Free: (800) 461-5539
Phone: (509) 886-1566
Fax: (509) 884-5464
Address:
Mail:
PO Box 75
Wenatchee, WA 98807
Physical:
4857 Contractors Drive
E. Wenatchee, WA 98802
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|
 |
Rears Airblast Sprayer Calibration Charts
| 1000 ft run |
If Plant
Settings are: |
Plants per
1000 ft. |
| 3 ft. |
333.2 |
| 4 ft. |
250 |
| 5 ft. |
200 |
| 6 ft. |
166.6 |
| 7 ft. |
142.8 |
| 8 ft. |
125 |
| 9 ft. |
111.2 |
| 10 ft. |
100 |
| 11 ft. |
91 |
| 12 ft. |
83.3 |
| 13 ft. |
77 |
| 14 ft. |
71.4 |
| 15 ft. |
66.6 |
| 16 ft. |
62.5 |
| 17 ft. |
58.8 |
| 18ft. |
55.6 |
| 19 ft. |
52.6 |
| 20 ft. |
50 |
| 21 ft. |
47.6 |
| 22 ft. |
45 |
| 23 ft. |
43.5 |
| 24 ft. |
41.7 |
| 25 ft. |
40 |
| 26 ft. |
38.5 |
| 27 ft. |
37 |
| 28 ft. |
35.7 |
|
Step No. 1 - "Ground Speed Check"
(Do Not Rely on Tractor Speedometer) Establish a preferred "Operating Speed in a Pre-set Gear." Used the chart (or formula) below, Record selected speed and time.
| Elapsed Time in 1000ft of Travel at Given Speed |
| Speed |
Time |
| 1 mph |
11 min. 22 sec. |
| 1.5 mph |
7 min. 35 sec. |
| 2 mph |
5 min. 41 sec. |
| 2.5 mph |
4 min. 33 sec. |
| 3 mph |
3 min. 47 sec. |
| 3.5 mph |
3 min. 15 sec. |
| 4 mph |
2 min. 59 sec. |
| 4.5 mph |
2 min. 32 sec. |
| 5 mph |
2 min. 16 sec. |
Use the chart at left to locate you plant settings and the number of plants in 1000 feet of travel.
With the tank half full of water for proper ballast, make a "dry-run" in the established
"pre-set" gear and speed, "passing the noted number of plants in 1000ft. If the
elapsed time proves more or less than that established, adjust "throttle" accordingly
and repeat ground speed check.
|
Step No. 2 - "Pressure & Spray Pattern Check"
Fill tank with water, engage fan, turn on manifold and make a wet run in the "pre-set gear and speed." Record the maximum pressure gauge reading. Visually check the accuracy of you spray pattern.
Step No. 3 - "Calibration"
To determine the correct "Discs and Cores" and desired Gallons Per Acre (G.P.A) use the following formula: G.P.A. X Ground Speed X Plant Middles X .002=Boom Volume Divide Boom Volume by two to determine volume for one side.
Determine the nozzles you will use to cover the target portion of the plant.
Select the discs & cores from the following chart in Step No. 4 that totals the required boom volume employing the number of nozzles you will use. Legend:
- G.P.A. = Gallons Per Acre
- G.P.M. = Gallons Per Minute
- V.P.N. = Volume Per Nozzle
- Plant Middles = Distance Between Rows of Plants
- Plant Settings = Distance Between Plants in a Row
- Pre-Set Gear assures Centrifugal Pump's Constant Volume (G.P.A.)
Step No. 4 - "Core & Disc Selection"
Locate column representing your Operating Pressure (PSI). Low Volume: 100gpa or less, uses the Low
Volume No. 25 Core. Once you have established G.P.M. record this figure and go to Next Step.
DISC
orifice &
diameter |
HOLLOW CONE LOW VOLUME NOZZLE
25 CORE CAPACITY G.P.M. @ P.S.I. |
HOLLOW CONE DILUTE NOZZLES
45 CORE CAPACITY G.P.M. @ P.S.I. |
| 80psi |
100psi |
125psi |
150psi |
200psi |
80psi |
100psi |
125psi |
150psi |
200psi |
D-2
.041 |
.22 |
.25 |
.27 |
.29 |
.34 |
.28 |
.32 |
.35 |
.38 |
.44 |
| 58° |
60° |
60° |
61° |
61° |
55° |
57° |
57° |
58° |
58° |
D-3
.047 |
.26 |
.29 |
.32 |
.35 |
.40 |
.33 |
.36 |
.40 |
.44 |
.51 |
| 67° |
68° |
68° |
68° |
69° |
60° |
61° |
61° |
62° |
62° |
D-4
.063 |
.40 |
.45 |
.49 |
.54 |
.62 |
.50 |
.56 |
.62 |
.68 |
.78 |
| 80° |
81° |
81° |
82° |
82° |
72° |
73° |
73° |
73° |
73° |
D-5
.078 |
.48 |
.54 |
.59 |
.65 |
.75 |
.64 |
.71 |
.78 |
.86 |
.99 |
| 84° |
85° |
85° |
85° |
84° |
76° |
76° |
76° |
76° |
76° |
D-6
.094 |
.62 |
.70 |
.77 |
.85 |
.97 |
.83 |
.92 |
1.04 |
1.15 |
1.33 |
| 89° |
89° |
89° |
89° |
89° |
81° |
81° |
81° |
80° |
80° |
D-7
.109 |
.73 |
.81 |
.89 |
.85 |
1.18 |
.97 |
1.11 |
1.23 |
1.35 |
1.57 |
| 93° |
93° |
93° |
92° |
92° |
87° |
87° |
87° |
86° |
86° |
D-8
.125 |
.89 |
.97 |
1.08 |
1.19 |
1.36 |
1.21 |
1.35 |
1.51 |
1.68 |
1.94 |
| 97° |
97° |
97° |
96° |
96° |
90° |
90° |
90° |
89° |
89° |
D-10
.156 |
1.07 |
1.21 |
1.34 |
1.48 |
1.71 |
1.57 |
1.77 |
1.97 |
2.18 |
2.50 |
| 103° |
103° |
103° |
102° |
102° |
93° |
93° |
93° |
92° |
92° |
DISC
orifice &
diameter |
HOLLOW CONE LOW VOLUME NOZZLE
46 CORE CAPACITY G.P.M. @ P.S.I. |
HOLLOW CONE DILUTE NOZZLES
56 CORE CAPACITY G.P.M. @ P.S.I. |
| 80psi |
100psi |
125psi |
150psi |
200psi |
80psi |
100psi |
125psi |
150psi |
200psi |
D-2
.041 |
.37 |
.42 |
.46 |
.50 |
.57 |
.35 |
.39 |
.43 |
.47 |
.55 |
| 21° |
21° |
21° |
20° |
19° |
17° |
18° |
18° |
18° |
17° |
D-3
.047 |
.45 |
.51 |
.56 |
.61 |
.70 |
.45 |
.53 |
.59 |
.65 |
.75 |
| 24° |
24° |
24° |
23° |
22° |
23° |
24° |
24° |
24° |
23° |
D-4
.063 |
.78 |
.88 |
1.07 |
1.07 |
1.23 |
.78 |
.87 |
.96 |
1.06 |
1.23 |
| 33° |
33° |
33° |
32° |
32° |
29° |
30° |
30° |
30° |
29° |
D-5
.078 |
1.10 |
1.25 |
1.37 |
1.50 |
1.73 |
1.08 |
1.20 |
1.33 |
1.47 |
1.69 |
| 42° |
42° |
42° |
41° |
41° |
34° |
35° |
35° |
35° |
34° |
D-6
.094 |
1.58 |
1.73 |
1.95 |
2.16 |
2.50 |
1.55 |
1.74 |
1.93 |
2.13 |
2.46 |
| 50° |
50° |
50° |
49° |
48° |
41° |
41° |
41° |
40° |
39° |
D-7
.109 |
1.97 |
2.22 |
2.47 |
2.73 |
3.15 |
2.15 |
2.40 |
2.67 |
2.94 |
3.40 |
| 56° |
56° |
56° |
55° |
54° |
54° |
54° |
54° |
53° |
52° |
D-8
.125 |
2.62 |
2.93 |
3.26 |
3.60 |
4.17 |
2.73 |
3.05 |
3.39 |
3.73 |
4.32 |
| 62° |
62° |
62° |
61° |
60° |
59° |
59° |
59° |
58° |
57° |
D-10
.156 |
3.53 |
3.96 |
4.41 |
4.83 |
5.69 |
3.82 |
4.26 |
4.74 |
5.22 |
6.03 |
| 68° |
68° |
68° |
66° |
65° |
67° |
67° |
67° |
66° |
66° |
Step No. 5 - "Gallonage Accuracy Check"
With "Discs and Cores" established and installed, fill tank with water.
Mark water level on sight gauge.
In the "pre-set gear and speed" with airblast fan engaged, make a "wet run"
passing the number of plants previously marked off in 1000ft, shut down promptly at run's end.
Return to the same place and position where sprayer was filled and sight gauge was marked.
Using a five gallon can, measure amount of water required to refill tank to mark
on sight gauge. Record this figure as "Gallons User Per 1000ft" of
distance traveled. With the following factors now known: Plant Middles
(distance between rows); Distance Traveled (1000ft); and Gallons Used
(1000ft); the formula below will provide you with the actual G.P.A. used.
If this figure fails to coincide
with your "Selected Gallons Per Acre", change spray disc size accordingly and repeat
"Step No. 5 Gallonage Accuracy Check."
IMPORTANT
NOZZLES WILL WEAR!!! This is especially true when using wettable
powders. As the nozzles wear (enlarging orifice diameter), the application rate will increase even
though pressure and speed are accurately known and held constant. A periodic G.P.A. Accuracy Check
(Step No. 5 above) in accordance with use, is warranted to maintain "Gallons Per Acre"
accuracy.
CHANGING TRACTOR TIRES
If, in changing tractor tires, tire diameter is changed, the sprayer has to be recalibrated. |
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