TeeJet 844-AB Sprayer Control - Manual (Page 19)

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98-70007-EN R4
844-AB
CHAPTER 7 - OPERATIONS
Before operating, check connections related to the Sprayer control
assembly. The sensors should be checked to ensure the console
receives uninterrupted signals.
IMPORTANT! When work occurs around a sprayer/farm chemicals,
wear protective clothing and eye wear. Partially fill the
sprayer tank with water to flush the system. Perform an
inspection of the spray nozzles to ensure they are spraying
the correct pattern.
The Master Boom Switch should be in the “Off” position. Perform the
following steps prior to application:
1. Ensure the tank shut-off valve is “Open”.
2. Start the engine, engage the pump and set the RPM to the level
to be used during application.
3. Power on the 844-AB by pressing the Programme key.
4. Ensure the preset reference flow number matches the nozzles
being used.
5. Ensure the console recognizes simulated speed. If the simulated
speed has been disabled due to movement of the sprayer,
press the Programme and Plus keys to activate the high
simulated speed. Press the Programme and Minus keys to
activate the low simulated speed.
Figure 59: Simulated speed (Low)
Km/H
SPD
LO
SIM
9.7
1 2 3 4 5 6 7 8 9 10 11 12
6. Power “ON” the toggle switches for each spray boom section.
7. Press the Auto/man key so the red LED light indicates “MAN”
mode.
8. Toggle the Master boom switch to “ON”.
9. Adjust the pressure with the Plus and Minus keys. The
pressure should increase with the Plus key and decrease with
the Minus key. During adjustment, the sprayer will be active
so spray nozzle performance can be visually monitored.
10. Press the Auto/man key so the red LED light indicates “Auto”
mode. The 844-AB should adjust to the appropriate target
application rate for the simulated speed.
11. Press the Programme and Plus keys simultaneously
during spraying to switch the console to “high” simulated speed.
The 844-AB should adjust to the appropriate target application
rate for the simulated speed.
12. Press the Programme and Minus keys simultaneously
during spraying to switch the console to “low” simulated speed.
The 844-AB should adjust to the appropriate target application
rate for the simulated speed.
Toggle the Master boom switch to “OFF” to stop spraying.
NOTE: It is recommended that the entire sprayer be calibrated in
preparation for operation and to diagnose wear to spray
nozzles. Worn nozzles can contribute to costly chemical
waste and inaccurate spraying regardless of sprayer control
use. Calibration is important to obtain the benefits associated
with computerized sprayer control.
Spraying
Fill the sprayer tank and mix the chemical(s). The application rate
should already be programmed, as well as the spray nozzle size.
1. Power on the 844-AB by pressing the Programme key.
2. Toggle the appropriate individual boom switches to the “ON”
position.
3. Press the Auto/man key so the red LED light indicates “Auto”
mode.
4. With the Master boom switch in the “OFF” position, the target
application rate and the target symbol will be displayed on the
console.
5. With the Master boom switch in the “ON” position, the actual
application rate will be displayed and the target symbol will no
longer appear. The console will display the actual application
rate, vehicle speed, application area covered/total volume
applied and pressure (if a pressure transducer has been
installed).
6. Turn the Master boom switch to the “On” position as the area to
apply is entered. Spraying will begin.
7. Maintain vehicle speed for spraying. Moderate changes in
vehicle speed will not affect the application rate (changes are
compensated by automatic pressure increases or decreases).
To stop spraying, turn the Master boom switch to the “OFF” position.
Alarm warnings may occur momentarily while the pressure regulating
valve searches for a new setting (i.e. after the close of a boom
section or other changes in normal operation). However, if the alarm
continues for a longer time, the valve may have reached its limit and
the system will be unable to regulate flow correctly.