TeeJet 844-AB Sprayer Control - Manual (Page 20)

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844-AB
CHAPTER 8 - FEATURES
Boost mode
Increased or decreased chemical application may be required during
certain areas of application. The Plus and Minus keys allow for
easy adjustment. Boost mode can be activated while spraying during
“Auto” mode by pressing either the Plus or Minus keys once.
With each subsequent press of the Plus key, the application rate
will increase by 10%. With each subsequent press of the Minus
key, the application rate will decrease by 10%.
If the Plus or Minus key is pressed inadvertently during
operation, a delay of three seconds will deactivate Boost mode.
Succeeding presses will change the target rate in 10% increments to
a maximum of +/- 90% of the target rate.
Example: To increase the application rate by 10%, press the
Plus key once to activate Boost mode. Press the
Plus key again to initiate a 10% increase. To decrease
the application rate by 10%, press the Minus key once to
activate Boost mode. Press the Minus key again to initiate
a 10% decrease.
Application rate changes are monitored on the display as they occur.
The console will display “UP 10”, “UP 20”, “DN 20”, “DN 30”, etc. for
approximately three seconds before returning to actual application
rates.
Figure 60: Boost mode
1 2 3 4 5 6 7 8 9 10 11 12
70
UP
32
Bar
Km/H
L/Ha
0.166
Ha
To return the application rate to the original target rate, use the
Plus or Minus keys individually to increase/decrease the
rate in 10% increments, or press the Plus and Minus keys
simultaneously to return to the programmed target application rate.
NOTE: During boost mode, the target symbol will flash at the top
of the console to indicate the sprayer is not operating at the
target application rate.
Area/volume display
The 844-AB records application area and measures the total volume
applied while the Master boom switch is in the “ON” position. The
area counter measures treated hectares and is dependent on
the value programmed for swath width. The volume measured is
dependent on flow meter impulses and is available on flow-based
models only.
The console will alternately display the treated area sprayed and
the total volume applied (litres) since the last time the area counter/
volume measure was cleared.
To clear the area counter/volume measure, press and hold the
Plus and Minus keys simultaneously for three seconds. The
area/volume measure can only be cleared during Operations mode
with the Master boom switch in the “Off” position.
Figure 61: Area/volume display
1 2 3 4 5 6 7 8 9 10 11 12
60.0
3.1
5.6
Bar
Km/H
L/Ha
1.507
Ha
NOTES: The area counter/volume measure works only when the
Master boom switch is in the “On” position.
If a pressure-based controller is being used, the volume
feature will be disabled. The total area will be displayed at
all times.
Application alarm
If the 844-AB detects a continuous discrepancy of 10% or more
between the Target application rate and the Actual application rate,
the application rate units (L/Ha) will flash in the display window. This
will alert the operator to a problem with the plumbing, operation or
programming.
Figure 62: Application alarm
1 2 3 4 5 6 7 8 9 10 11 12
Err
3.1
4.8
Bar
Km/H
L/Ha
.545
Ha