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844E Sprayer Crontrol
98-70006 R3
To accept this value and advance to the next step, press the key.
NOTE: This speed value can be adjusted to optimize system performance. If you notice that the valve seems to
“search” for the programmed application rate by cycling the pressure up and down continuously, reduce
the number until the “searching” is minimized or eliminated. Conversely, a higher number will increase the
valve response speed and speed up the rate of adjustment.
Control Valve Type
Boom Control Valve Type: 2-Way/3-Way
Default = 2 Way
While in the Boom Control Valve Type step, the symbol will be fl ashing at the top of the display. The
programmable information (2 Way or 3 Way) will be displayed at the left in the console display.
This programming step is used to distinguish the type of on-off boom control valves you have on your system.
There are two types of valves that can be used, 2-way control valves or 3-way control valves.
A 2-way control valve is simply an on/off valve. Flow is either directed to the boom section(s) or it is blocked or
diverted away from the booms. A 3-way control valve is know as a by-pass valve. Flow continuously passes
through this valve. When the valve is activated (on), fl ow is directed to the boom section(s). When the valve is not
activated (off), fl ow is directed through a bypass port, back to the supply tank.
If you are using the 3-way type of boom control valves in your system, change the value using the or keys.
Press the key to accept the value and advance to the next programming step.
If the default value is correct, press the key to accept the value and advance to the next programming step.
NOTE: If using 3-way, bypass boom control valves, refer to the instruction manual of the valve you are using for
proper calibration instructions.
Calibrate Speed
Speed Sensor Calibration
Default = 250
NOTE: During Speed Calibration, the 844 will automatically sense whether a Wheel Speed or Radar Speed
Sensor is being used.
While in the Speed Calibration Programming Step, the symbol will be fl ashing at the top of the display. The
programmable value (250) will be displayed in the lower right corner of the display.
Proximity/Magnetic Pulses
The speed sensor needs to be calibrated in order to provide the proper speed and area readings. The value for
this step is the number of pulses generated by the speed sensor in 300 ft / 100 m. This value can be determined
by automatic calibration while driving exactly 300 ft /100 m, or by entering the number manually.
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