SPRAYER CALIBRATION PROCEDURES
NOTE: To avoid wind drift, use lower pressure and higher spray volume.
Guidelines For Sprayer Calibration
Before calibrating your sprayer, first determine whether each nozzle is delivering at a uniform rate. Place quart jars under all nozzles and watch as they fill up. The level should rise uniformly and take the same time (within 10%) for all nozzles to fill the jars. Replace any nozzle showing a discharge rate different from the others.
Calibrating the Sprayer
1.Mark off 660 feet (1/8 mile).
2.Fill the tank with water.
3.Set the sprayer to your desired operating pressure.
4.Turn the sprayer on and drive at the constant speed you will be spraying. Calibration on a road or unplowed field will give different results than on soft cultivated ground. Note tachometer reading so same speed can be maintained later.
5.Measure the amount of water it takes to refill the tank completely.
6.Calculate the amount applied:
Number of gallons used x 66 (factor) | = | Gallons applied |
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| Spray Swath in Feet |
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| per acre |
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Example: If 10 gallons are used in 660 feet and the spray swath is 40 feet, spraying rate is 16.5 gallons per acre. |
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10 x 66 | = | 660 |
| or 16.5 gallons per acre |
| FLAT SPRAY NOZZLE |
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40 | 40 |
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| FOR BROADCAST SPRAYING | |||||||||||
7. | To calculate the amount of chemical to put in the tank: | ||||||||||||||||||
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| Gallons Per Acre |
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Sprayer Tank Size |
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| Liquid | Nozzle | Based on 20" Nozzle Spacing | |||||||||
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| then; | Nozzle | Presure Capacity | 4 | 5 | 7.5 | 10 | ||||||||||
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| No. | In PSI. | In GPM. | MPH | MPH | MPH | MPH | ||||
Desired GPA |
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| 8002 | 20 | .14 | 10.5 | 8.4 | 5.6 | 4.2 | ||||||
Recom. amount of chemical |
| Acres | Amt. of chemical |
| 25 | .16 | 11.8 | 9.4 | 6.3 | 4.7 | |||||||||
x |
| 30 | .17 | 12.9 | 10.3 | 6.9 | 5.2 | ||||||||||||
| 40 | .20 | 14.8 | 11.8 | 7.9 | 5.9 | |||||||||||||
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| 8003 | 20 | .21 | 15.7 | 12.6 | 8.4 | 6.3 | |||||||||
Example: If a 500 gallon tank is used and 16.5 gallons per acre are applied, one |
| 25 | .24 | 17.6 | 14.1 | 9.4 | 7.1 | ||||||||||||
| 30 | .26 | 19.0 | 15.4 | 10.3 | 7.7 | |||||||||||||
tank will cover 30.3 acres. If three pounds of chemical are required per acre, then |
| 40 | .30 | 22.0 | 17.8 | 11.8 | 8.9 | ||||||||||||
8004 | 20 | .28 | 21.0 | 16.8 | 11.2 | 8.4 | |||||||||||||
90.0 pounds of chemical are required per tankful. |
| 25 | .32 | 24.0 | 18.7 | 12.5 | 9.4 | ||||||||||||
| 30 | .35 | 26.0 | 21.0 | 13.7 | 10.3 | |||||||||||||
500 |
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| 40 | .40 | 30.0 | 24.0 | 15.8 | 11.9 | |
= | 30.3 acres covered |
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| then; |
| 8005 | 20 | .35 | 26.0 | 21.0 | 14.0 | 10.5 | ||||||
16.5 |
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| 25 | .40 | 29.0 | 23.0 | 15.7 | 11.7 | ||||||||
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| 30 | .43 | 32.0 | 26.0 | 17.2 | 12.9 | |
3 lbs. (gal.) x 30.3 = | 90.0 lbs. (gal.) per tankful |
| 40 | .50 | 37.0 | 30.0 | 19.8 | 14.9 | |||||||||||
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FLOODJET TIPS
FOR BROADCAST SPRAYING
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| Liquid | Capacity |
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Nozzle |
| Orifice | Pressure |
| In | 4 |
| 5 | 6 | 8 | 10 | ||||
No. |
| Dia. | In PSI. | GPM. | MPH | MPH | MPH | MPH | MPH | ||||||
TKSS2 |
| .046" | 10 | .20 | 7.4 |
| 6.0 | 4.9 | 3.7 | 3.0 | |||||
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| 20 | .28 | 10.5 |
| 8.4 | 6.9 | 5.2 | 4.2 | ||||
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| 30 | .35 | 12.9 |
| 10.3 | 8.7 | 6.5 | 5.2 | ||||
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| 40 | .40 | 14.8 |
| 11.8 | 9.9 | 7.5 | 5.9 | ||||
TKSS2.5 |
| .052" | 10 | .25 | 9.3 |
| 7.4 | 6.1 | 4.6 | 3.7 | |||||
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| 20 | .35 | 12.9 |
| 10.3 | 8.7 | 6.5 | 5.2 | ||||
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| 30 | .43 | 15.9 |
| 12.8 | 10.6 | 8.0 | 6.4 | ||||
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| 40 | .50 | 18.6 |
| 14.9 | 12.4 | 9.3 | 7.4 | ||||
TKSS3 |
| .057" | 10 | .30 | 11.1 |
| 8.9 | 7.5 | 5.6 | 4.5 | |||||
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| 20 | .42 | 15.7 |
| 12.6 | 10.4 | 7.8 | 6.3 | ||||
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| 30 | .52 | 19.3 |
| 15.4 | 12.8 | 9.7 | 7.7 | ||||
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| 40 | .60 | 22.0 |
| 17.8 | 14.8 | 11.2 | 8.9 | ||||
TKSS4 |
| .065" | 10 | .40 | 14.9 |
| 11.9 | 9.9 | 7.5 | 5.9 | |||||
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| 20 | .57 | 21.0 |
| 16.8 | 13.9 | 10.5 | 8.4 | ||||
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| 30 | .69 | 26.0 |
| 21.0 | 17.1 | 12.8 | 10.3 | ||||
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| 40 | .80 | 30.0 |
| 24.0 | 19.8 | 14.8 | 11.9 | ||||
TKSS5 |
| .073" | 10 | .50 | 18.6 |
| 14.9 | 12.4 | 9.3 | 7.4 | |||||
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| 20 | .71 | 27.0 |
| 21.0 | 17.6 | 13.1 | 10.7 | ||||
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| 30 | .87 | 33.0 |
| 26.0 | 21.7 | 16.1 | 13.1 | ||||
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| 40 | 1.00 | 38.0 |
| 30.0 | 25.2 | 18.6 | 15.1 | ||||
TKSS7.5 |
| .091 | 10 | .75 | 28.0 |
| 22.0 | 18.7 | 14.0 | 11.1 | |||||
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| 20 | 1.10 | 39.0 |
| 32.0 | 26.4 | 19.8 | 15.8 | ||||
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| 30 | 1.30 | 49.0 |
| 39.0 | 31.9 | 24.1 | 19.3 | ||||
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| 40 | 1.50 | 56.0 |
| 45.0 | 37.4 | 27.5 | 22.0 | ||||
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| 40" |
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| Nozzle Spacing |
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Floodjet tips are positioned as shown in the diagram by the chart below. When positioning the tip as shown in Figure A the tip can be operated closer to the ground, thereby reducing the chance of wind drift.
The chart below shows capacities in gallons per acre at various speeds and liquid pressures. Capacities are based on water at 70 degrees F. with nozzles spaced at 40 inches.
The rate chart is based on 40 inch row spacings. For other spacings of nozzles on the boom, multiply the tabulated GPA coverage by the conversion factors shown below.
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| Other Spacing | 20 | 24 | 28 |
| 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | ||||
Conversion Factor | 2 | 1.67 | 1.43 | 1.33 | 1.25 | 1.18 | 1.11 | 1.05 | 1.00 | .95 | .91 | |||||||
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Figure A
6" to 7"
Flat Uniform Sprayer Pattern
Page 29
