General - Goldacres Prairie Pro Operator's Manual

CALIBRATION

General

Spraying is a complex task, that is affected by many
variables. It is the responsibility of the operator to
be familiar with spraying variables and to understand
the spraying process prior to operation.
In general, the operator should know:
• The target application rate
• The required operating (spray) pressure
• The speed of travel
• The desired droplet size
To make the spray application as accurate as
possible, it is critical that your spray equipment is
regularly calibrated.
The Raven automatic controller is designed to
improve the uniformity of spray applications. Raven
controllers will monitor and control the determined
application volume, but prior calculations will be
required to ensure spraying pressures do not exceed
operating parameters.
The Raven system comprises a console, flow meter,
speed sensor and li uid flow control valve.
As the sprayer is moving, the console records
ground speed and then calculates the amount of
flow re uired to maintain the respective application
rate at that speed. The console monitors the amount
of flow being used via the flow meter and then
determines if the flow is correct for that speed. low
adjustments are made by the control valve which
varies the amount (volume) of bypass and thus the
volume being applied via the boom is controlled.
When the console is in the automatic mode, as
the ground speed increases, the flow to the booms
required to maintain the application volume will be
increased. This will result in the pressure (as displayed
on the gauge) increasing. Conversely, as the ground
speed decreases, the re uired flow to the booms, as
well as the pressure, decreases.
Prairie Pro Operator's Manual MY19 - REV 2
Chapter 6
When the console is in the manual mode, as the
ground speed increases, the pressure and flow will
remain constant and the application volume will
decrease. Similarly, as the ground speed decreases,
again the pressure and flow will remain constant and
the application rate will increase.
Record your console calibration information in the
table below for future reference:
BOOM VALUE BOOM
CAL
1
2
3
4
5
6
7
8
PARAMETER VALUE UNIT
Speed Cal
Meter Cal
Valve Cal
Rate 1
Rate 2
Tier 1
Tier 2
Tier 3
Pump Cal
L/min (per nozzle) =
60000 x l/min (per nozzle)
L/ha =
Km/hr x W (metres)
Metres x 3.6
Km/hr =
Time (seconds)
VALUE UNIT
CAL
9 cm
10 cm
11 cm
12 cm
13 cm
14 cm
15 cm
16 cm
-
-
-
L/Ha
L/Ha
L/min
L/min
L/min
RPM
L/ha x km/hr x W
60,000
Chapter 6 - Calibration -