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To check the flow rate wear the appropriate protective clothing. 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 spill-
age) 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 = 2m
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 during the operation (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
8
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