INSTRUCTIONS FOR USE
AGS 1800 - 2000 EN-HV (HVB)
Rev.9/2018
126
19.5
USE OF TABLES
19.5.1
NOZZLE SELECTION
Example:
You have the following data:
•
desired consumption per hectare of 400 l
•
working speed: 6 km/h
1. In the speed column for 6 km/h of table 2 find the desired consumption per hectare 400 l/ha.
2. See the flow rate of the nozzle on the left side of the table; in our case, this is 2,00 l/min.
3. Select the appropriate nozzle at specific pressure from table 1: e.g. TABLE 1, nozzle
LECHLER, brown colour at a pressure of 3.2 bar.
19.5.2
SELECTING APPROPRIATE SPEED AND WORKING PRESSURE
Example:
•
desired consumption per hectare 400 l/ha
•
installed LECHLER nozzle, RED colour
•
desired pressure between 2 and 4 bar
•
desired working speed between 4 and 6 km/h
1. In table 1, find the nozzles, installed in your sprayer. LECHLER RED nozzles have a
flow rate of 1.26 l/min at a pressure of 2 bar and a flow rate of 1.8 l/min at a pressure
of 4 bar.
2. Find the consumption value of 400 l/ha at a nozzle flow rate between 1.2 and 1.8
l/min in table 2; find the speeds 4-6 km/h in the vertical column.Results:
o
4,5 km/h at a pressure of 2.8 bar
o
4,8 km/h at a pressure of 3.2 bar...
19.6
DIFFERENT CALCULATIONS
The water consumption values can be taken from the tables or calculated in accordance with the
following equation:
(km/h)
SPEED
WORKING
(l/min.)
RATE
FLOW
NOZZLE
x
1200
(l/ha)
HECTARE
PER
N
CONSUMPTIO
WATER
=
The required flow rate of a nozzle per hectare and the working speed can be calculated with the help of
the following equation:
1200
(km/h)
SPEED
x WORKING
(l/ha)
HECTARE
PER
N
CONSUMPTIO
WATER
(l/min.)
RATE
FLOW
NOZZLE
=
The simplest way to determine the tractor’s speed is to measure a certain distance and the required
time to pass this distance:
(s)
TIME
REQUIRED
3,6
x
(m)
TRAVELED
DISTANCE
(km/h)
SPEED
=
Remark: check the actual flow rate of the nozzles by measuring it. If the flow
rate of a nozzle at a specific pressure exceeds the table values for more than
10%, then the nozzle insert is worn and needs to be replaced .
