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Wear the appropriate protective clothing when checking the flow rate. Choose and fit
the feed nozzle that is likely to be required (see 'TO CLEAN FEED NOZZLE' for
fitting instructions). Fill the bottle with the spray mix, attach to the sprayer (avoiding
spillage) and then turn the sprayer over above a suitable container (N.B. do not
switch on the sprayer). Wait until the liquid flow is steady and then allow the liquid
to flow into a measuring container for one minute and measure the volume dispensed.
If the flow rate is very different from that required change the feed nozzle and repeat
the above procedure. If the flow rate is close to that required adjust walking speed.
Example: Required spray volume = 30 l/ha; Spray pass interval = 2 m
Flow rate measured = 85 ml/min
Walking speed (m/s) =
i.e. 0.24 m/s or 14.4 m in one minute (0.24 x 60)
Mark out a distance of 14.4 m and practice walking it in one minute using the sprayer
as if spraying (see 'BEFORE SPRAYING').
6 x spray pass interval (m) x total spray volume (l/ha)
=
85
6 x 2 x 30
Flow rate (ml/min)
= 0.24 m/sec
9
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