TeeJet 844-E Sprayer Control - Manual (Page 28)

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844-E Sprayer Control
ChaptEr 5 - FEatUrES
boost Mode
There may be instances where ”on the go” increased or decreased
chemical application may be required in certain areas of your field.
In situations like this, the Plus key and Minus key will allow
you to easily make the necessary adjustments. The boost mode can
be activated while spraying in the Auto mode by pressing either the
Plus key or Minus key once. With each subsequent press of
the Plus key , the application rate will be increased by 10%. Each
subsequent press of the Minus key will reduce the application rate
by 10%.
If the Plus key or Minus key is pressed once inadvertently
during operation, a delay of three seconds will deactivate the boost
mode. Succeeding presses will change the target rate as explained
above.
ExAMPLE: If increasing the application rate by 10%, press the
Plus key once to activate the boost mode, and a
second time to make the 10% increase. If decreasing the
application rate by 10%, repeat the above procedure using
the Minus key .
The application rate changes are monitored in the display, as you make
them. The display will show UP 10, UP 20, dn 20, dn 30,
etc. This will be displayed for approximately 3 seconds before the
display returns to reading actual application rates. When making the
application rate changes, it is not necessary to set the Auto/Man to
“MAN” mode.
To return the application rate to its programmed status, you may use
the Plus key or Minus key individually to step back to the
application rate in 10% increments, or press them simultaneously to
return to the programmed target application rate.
NOTE: While in the boost mode, the target symbol will flash at the
top of the console display, to remind the operator they are not
spraying at the target application rate.
area/Volume Feature
The 844 Sprayer Control will count application acres (hectares) and
measure total volume applied while the master boom switch is in the
“on” position. The area counter will measure treated acres (hectares)
and is dependent on the value programmed for nozzle spacing on page
15. The volume measure is dependent on flow meter pulses and is
available on flow based models only.
The lower right of the display window will alternately show the treated
area sprayed and the total volume applied since the last clearing of the
area counter/volume measure.
To clear the area counter/volume measure, press and hold the Plus
key and Minus key simultaneously for three (3) seconds while
viewing the normal operating mode.
NOTE: The area memory counter/volume measure only works when
the Master Boom Switch is turned “ON”.
NOTE: If you are using a pressure based controller, the Volume feature
is disabled. The total area will then be displayed at all times
Flow rate Feature
The 844 Sprayer Control will measure a flow rate moving through
the flow meter in GPM (LPM) {Imp GPM}. This feature is activated by
pressing and holding the Program key while spraying in the normal
operating mode. The flow rate display replaces the area/volume display
in the lower right portion of the display.
Any time the Program key is pressed while spraying in the normal
operating mode the flow rate will be displayed. Releasing the Program
key will cause the display to return to area/volume.
This feature can be used for tip calibration or for calibrating the flow
meter. Refer to page 29 of this manual for flow meter calibration
procedures.
NOTE: Not all 844 models contain this feature. If the display makes no
change when pressing on the Program key while spraying
in the normal operating mode, then this feature is not available
with this console.
application alarm
If the 844 senses a continuous discrepancy of 10% or more between
the Target Application Rate and the Actual Application Rate, the
application rate units (GPA, G/1000 ft 2 or l/ha) will flash in the display
window. This alarms the operator to a problem with the sprayer
plumbing, operation or programming.
no Flow alarm
If the 844 stops receiving pulses from the flow meter, the turbine
symbol will flash at the top of the display. This alarm indicates
that the flow meter has stalled and alerts the operator that there is a
problem with the flow meter or elsewhere in the system.
This alarm will occur only when the Master Boom Switch and at least
one boom toggle switch is “on”.