7
When spraying with the boom, the sprayer must be calibrated to ensure proper spray coverage. Before calibrating the sprayer, it is
important to familiarize yourself with the “Operating Instructions” section. The calibration process is simplified when broken down
into the following steps:
1. Calculate the speed of the utility vehicle.
2. Consult the application rate charts for the desired or instructed Gallons per Acre (GPA) or Gallons per 1000 Sq. Ft.
1. Calculating the Speed
It is important to determine what speed you will be traveling at while spraying. While some utility vehicles may have speedometers,
it is still recommended that speed be calculated for accuracy purposes. To determine the speed follow these four steps:
NOTE: It is helpful for future references to record the
exact RPM and gear used to find your speed.
Speed in MPH
Time required (seconds) to travel
a distance of:
200 feet
300 feet
1.0
136
205
1.5
91
136
2.0
68
102
2.5
55
82
3.0
45
68
3.5
39
58
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
Calibrating the Sprayer
1. Measure a 200 foot or 300 foot distance on a field or a
surface similar to where you will be spraying.
2. Drive the equipment and sprayer (half-full is optimal)
across the measured distance at a constant rate of
speed. This should be a comfortable speed for spraying.
3. Have someone measure the amount of time (in seconds)
it takes to travel the measured distance. NOTE: Be sure
to maintain a constant speed while measuring the time.
4. Speed can be calculated by entering your data into
the equation Speed (mph) = (Distance (ft) x 60) / (Time
(seconds) x 88) or by consulting the table to the left.
