1128 Method Of Calibration Calibrating Hand Sprayers And High Pressure Hand Guns - PowerPoint PPT Presentation

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1128 Method Of Calibration Calibrating Hand Sprayers And High Pressure Hand Guns

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Because a gallon = 128 ounces and the area to be sprayed is 1/128 of ... Step 1. Measure area. 18.5 by 18.5 ft = 340 sq ft. Step 2. Time to spray = 51 seconds ... – PowerPoint PPT presentation

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Title: 1128 Method Of Calibration Calibrating Hand Sprayers And High Pressure Hand Guns


1
1/128 Method Of CalibrationCalibrating Hand
Sprayers And High Pressure Hand Guns
  • Because a gallon 128 ounces and the area to be
    sprayed is 1/128 of an acre, ounces collected
    gallons per acre.

2
Step 1
  • Measure out an area equal to 1/128th of an acre.
    Approximately 340 sq. ft. or an area 18.5 by 18.5
    ft.

18.5 ft
18.5 ft
3
Step 1
  • Maybe this shape would work better.

10 ft
34 ft
4
Step 1
  • Or maybe this shape.

1.5 ft
228 ft
5
  • The shape of the calibration course is not
    important.
  • However, the size of the course must equal 340 sq
    ft. or 128th of an acre.

6
Step 2
  • Measure the time it takes to spray the measured
    area. Repeat several times and take the average
    time.

7
Step 3
  • Spray into a container for the same amount of
    time it took to spray the measured area. Measure
    the water collected, in ounces. The amount
    collected in ounces equals gallons per acre.

8
EXAMPLE
HAND SPRAYER
  • Step 1. Measure area. 18.5 by 18.5 ft 340 sq
    ft
  • Step 2. Time to spray 51 seconds
  • Step 3. Amount collected 40 ounces
  • Therefore 40 ounces 40 GPA

9
Determining How Much Pesticide To Add To The
Spray Mixture
  • Recommendation is to apply 1 quart of 2,4-D per
    acre

10
  • The sprayer is applying 40 gallons per acre.
    Therefore You will need to add 1 quart of 2,4-D
    to each 40 gallons of water.
  • Your sprayer only holds 1 gallon of spray
    mixture. So how much pesticide will you need to
    add to the gallon of water?

11
  • 1 quart or 32 ounces divided by 40 gallons means
    that each gallon of water contains 0.8 ounces of
    2,4-D.
  • 1 fluid ounce 2 tablespoons. Therefore You
    will need 2 tablespoons of 2,4-D per gallon of
    water.

12
  • 1 fluid ounce 30 (cc) or (ml). Therefore If
    measuring in cc you would need 0.8 ounces X 30
    cc/ounce 24 cc per gallon of water.
  • A plastic syringe is an easy and accurate way to
    measure liquid pesticides.

13
  • How large of an area will 1 gallon spray? There
    are 43,560 ft2/acre. If 40 gallons will spray
    one acre then one gallon will spray an area 1/40
    that size.
  • 43,560 ft2 40
  • 1089 ft2.

14
1/128 Method Of Calibration
MULTIPLE NOZZLE BOOM-TYPE SPRAYERS
  • This method of sprayer calibration gives sprayer
    output in gallons per acre when nozzle discharge
    is measured in ounces over a course length that
    1/128th of an acre or 340 ft2

15
Step 1
  • Adjust the sprayer pressure and check for
    uniformity. Operate the sprayer for 1 minute and
    measure spray from each nozzle. Clean or replace
    any nozzle that delivers or - 5 than the
    output from a new nozzle in good condition.

16
Step 2
  • Measure the spray band width or nozzle spacing in
    inches on the boom to determine the course
    length.
  • The area to be sprayed must equal 1/128th of an
    acre or 340 ft2
  • If the nozzle spacing 20" then the distance to
    travel would be 204 ft.

17
  • 20" (1.67 ft) X 204 ft 340 ft2

204 ft
340 ft2 or 1/128 of an acre
1.67 ft
18
Step 3
  • Catch the spray from ONE nozzle while operating
    the sprayer under field conditions or for the
    time required to travel the needed distance at a
    desired speed.

19
Step 4
  • Measure the spray collected in ounces. The
    number of ounces collected is the same as the
    number of gallons per acre.

20
Example
  • You have a sprayer that has 15 nozzles on a 30
    inch spacing. How would you calibrate it using
    the 1/128th method?

21
Step 1
  • Make sure sprayer is adjusted properly and
    nozzles are in good working order.

22
Step 2
  • Measure nozzle spacing in inches on the boom to
    determine the course length.
  • Using the formula
  • 4084 / 30 inches 136 feet
  • Or from table 1. W 30 inches and D 136 feet

23
Table 1. Distance (D) to travel and seconds
required for selected speeds when nozzle coverage
is (W) inches.
W (in)
D (ft)
2 mph
3 mph
20
204
70 seconds
46 seconds
24
170
58
39
26
157
54
36
28
146
50
33
30
136
46
31
24
Step 3
  • Time how long it takes to travel the 136 ft at a
    desired speed. Travel this distance several
    times and get an average time.
  • Perhaps it takes an average of 31 seconds to
    travel the 136 feet.

25
Step 4
  • Collect the spray from ONE nozzle in a container
    for 31 seconds.
  • Measure the water collected in ounces.
  • The amount collected in ounces equals gallons per
    acre.
  • If in 31 seconds you collected 20 ounces your
    sprayer output would be 20 gallons per acre.

26
Determining How Much Pesticide To Add To The
Spray Mixture
  • The recommendation from the label is to apply 1
    quart of 2,4-D per acre.

27
  • The sprayer is applying 20 gallons per acre.
  • Therefore You will need to add 1 quart of 2,4-D
    to each 20 gallons of water.

28
  • Your sprayer holds 200 gallons. So how much
    pesticide will you need to add to the 200 gallon
    spray tank?
  • 200 gallons divided by 1 qt 2,4-D per 20 gallons
    water 10 quarts of 2,4-D per tank

29
  • How large an area can be sprayed by your 200
    gallon tank?
  • 200 gallons divided by 20 gallons per acre 10
    acres
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