APPENDIX H
122 Hawkeye Nozzle Control Operation Manual
Max Pump PWM
Enter a maximum PWM duty cycle percent to set the maximum desired output for
a pulse width modulated (PWM) hydraulic control valve. This setting limits how far
the PWM valve will open.
Maximum Pressure
Enter the maximum desired pressure for the system. Upon exceeding maximum
pressure, an alert will be displayed, flow control will be overridden and the rate
controller will maintain maximum pressure. For Hawkeye nozzle control, the
maximum operating pressure of Hawkeye nozzles is 80 PSI (550 KPA).
Flowmeter Cal
The flowmeter calibration value and units may be found on the tag attached to
the flowmeter installed in the application system. Select the appropriate units for
the flowmeter calibration to ensure proper calibration of the application system.
Min Pump PWM
Enter a minimum PWM duty cycle percent to set the minimum desired output
(zero point or shutoff point) for a pulse width modulated (PWM) hydraulic control
valve.
Minimum Nozzle
PWM
Enter a minimum PWM percent to set the minimum desired output (zero point or
shutoff point) for the Hawkeye nozzle control valves. With the machine master
switch in the on position, decrease this value until the minimum desired pressure
is reached in a liquid system.
Minimum Pressure
The minimum pressure feature will allow the operator to set the lowest tolerable
pressure during field operations. If the application system reaches the minimum
pressure, the VT will display an alert and application system will maintain the flow
rate to keep the monitored pressure consistent and to maintain the spray pattern.
Node Orientation
The number displayed in the orientation field is the downward direction depicted
in the graphic detected based on how the rate controller ECU is mounted.
Nozzle Spacing
The nozzle spacing value set during the calibration wizard is displayed on the
diagnostic prompt. Verify this value matches the tip spacing on the equipment to
ensure accurate application of products during field operations.
Number of Sections
The number of sections is the number of section valves installed on the machine.
For Hawkeye nozzle control systems without section valves, enter the desired
number of controlled sections. This value should be from 1 to 16.
Off Target Pressure
Percentage
The off pressure percent sets the allowable difference between the target and
actual pressures. If the difference between the actual and target pressure exceeds
the set percentage for more than five seconds, the system will display an off
pressure alarm.
Off Rate Limit
The off rate percent sets the allowable difference between the target and actual
product application rates. If the difference between the actual and target rate
exceeds the set percentage for more than five seconds, the system will display an
off rate alarm.
Override Seconds
Use the override seconds value to set the time which the system should override
automatic section commands and keep sections on. This feature may be used
when starting application with the equipment at a complete stop, or to manually
override all sections on for the set number of seconds.
Pressure +/-
Sets the increment by which either the target pressure will increase or decrease
when using the +/- softkeys during an active application.
Pressure Presets
Enter non-zero pressure presets to allow the operator to quickly switch between
the set pressures during field operations in the automatic pressure control mode.
Pressure Sensor Type
Select the pressure sensor drop down field and select the boom or sparge
transducer to be calibrated for operation.
Setting Help Screen Terminology
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