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N.B. Do not exceed 3 metre spray pass intervals when using water-based spray mix-
tures (with the sprayer set at five batteries) since the larger spray droplet sizes being
used could then result in poor spray coverage and product efficacy. Spray pass inter-
vals should be reduced as crop height increases.
Choose and fit the feed nozzle that is likely to be required. The actual flow rate
should be checked holding the ULVA+ in the spraying position with the feed nozzle
vertical. Remove the atomiser disc by unscrewing the disc fixing screw by hand and
then turn over the sprayer. Wait until the liquid flow is steady and then allow the
liquid to flow into a suitable container for one minute and measure the volume dis-
pensed. If the flow rate is substantially 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 = 10 l/ha; Spray pass interval = 3m
Flow rate measured = 150 ml/min
Walking speed (m/s) =
i.e. 0.83 m/s or 50 metres in one minute (0.83 x 60)
Mark out a distance of 50 metres and practice walking it in one minute.
Flow rate (ml/min)
6 x spray pass interval (m) x total spray volume (l/ha)
RED
BLACK
Increased Flow Rate
9
GREY
PINK
150
= 0.83
=
6 x 3 x 10
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