39
844E Sprayer Crontrol
98-70006 R3
FEATURES
Boost Mode
There may be instances where ”on the go” increased or decreased chemical application may be required in
certain areas of your
fi
eld. In situations like this, the
and
keys 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
or
key once. With each subsequent press of the
key, the application rate will be increased by 10%. Each
subsequent press of the
key will reduce the application rate by 10%.
If the
or
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
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
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
or
keys 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
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 19. The volume measure is dependent on
fl
ow
meter pulses and is available on
fl
ow 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
and
keys simultaneously for three 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
