Micron Technology Turbofan - Manual (Page 21)

DRAFT
20
DISTANCE TRAVELLED
IN ONE MINUTE
SWATH WIDTH
W METRES
SPEED S KM/HR
The following steps describe the calibration procedure in detail:
1. Establish the average forward speed of the sprayer. The most accurate means of
assessing the speed is to drive the sprayer in the actual crop. The speed can than be
calculated from the time to cover a measured distance.
2. Establish the width of the swath of spray on the target. In row and broadacre crops
this will be proportional to the boom width. In orchard, vineyard and soft fruit
spraying this can be determined by the row spacing and the number of rows sprayed
at a time.
3. Calculate the area treated by the sprayer per minute. As an example, Fig 9 shows the
sprayer being operated over a field crop.
If the sprayer is being driven at S km/hr this corresponds to 1000 x S metres/hour:
Distance travelled =
1000 x S metres/minute
60
If the width of the swath is W metres, then the area treated per minute is:
Area treated
= 1000 x S x W metres
2
/minute
60
Figure 9. Coverage of sprayer