horsch Leeb 5.280 VL, Operating Instructions Manual

Page: 301 / 308

HORSCH Leeb metering cup
The Horsch Leeb metering cup is used to adjust
and check agricultural spraying implements. Be-
fore starting the measurement, the field sprayer
to be calibrated must be filled with clean water.
Now open the nozzles with the desired settings
for placing the crop protection agents. All nozz-
les should always be opened during setting or
checking.
Determining the placing quantity in l/ha
To determine the placing quantity, the HORSCH
Leeb metering cup is held under a spraying
nozzle of the field sprayer for 30 seconds at
20 in. (50 cm) nozzle spacing and for 60 seconds
at 10 in. (25 cm) nozzle spacing. The pump must
be switched on for the entire period and the
placing quantity set on the terminal must not be
changed. Now place the metering cup on a level
surface. The fluid level indicates the measured
placing quantity at different travel speeds.
The example shows: 16 gal lqd/ac (150 l/ha) at
7.5 mph (12 km/h) or 21 gal lqd/ac (200 l/ha) at
5.6 mph (9 km/h) etc.
¾
Placing quantity too high, lower spraying
pressure.
¾
Placing quantity too low, increase spraying
pressure.
Nozzle selection and control
The fluid level, which indicates the placing
quantity in l/ha on one side of the HORSCH
Leeb metering cup, shows at the same time on
the other side of the measuring cup with which
nozzle size and at which spraying pressure this
placing quantity is reached.
¾
At a nozzle spacing of 20 in. (50 cm) the res-
pective nozzle sizes can be read off directly.
¾
At a nozzle spacing of 10 in. (25 cm) the res-
pective nozzle sizes must be halved.
Example: The previous fluid level indicates that
at 20 in. (50 cm) nozzle spacing the desired
placing quantity of 16 gal lqd/ac (150 l/ha) is
achieved at approx. 7 mph (12 km/h) with nozzle
size 04 (red) at approx. 40 psi (2.7 bar) or with
nozzle size 03 (blue) at approx. 70 psi (4.8 bar)
etc. Accordingly, with a nozzle spacing of 10 in.
(25 cm), the placing quantity of 16 gal lqd/ac
(150 l/ha) at 7 mph (12 km/h) is achieved with
nozzle size 02 (yellow) at approx. 40 psi (2.7 bar)
or with nozzle size 015 (green) at approx. 70 psi
(4.8 bar).
All values apply to water with a temperature of
59°F° (15 °C) and the pressure measured at the
nozzle. As a rule, the spraying pressure display-
ed at the terminal is slightly higher, as pressure
losses occur between the fittings and nozzles.
Only for crop protection agents
MF 297