CHAPTER 4
24 ISOBUS Product Control Installation & Operation Manual
3. Select the HP Pressure or HP Plus Pump Control Setup button. The HP Pressure or HP Plus Pump Control Setup
screen will be displayed.
VALVE TYPE
The Valve Type option on the HP Pressure or HP Plus Pump Control Setup screen is locked to PWM close when
controlling an NH3 Applicator.
NOTE: Refer to the Pulse Width Modulation Valve Setup section on page 25 for details on setting the min
and max PWM, preset PWM and PWM frequency values.
VALVE CAL
The valve cal value sets the responsive characteristics of the control valve and is required for product control. The
recommended value is automatically entered when the valve type is selected. For more information about
adjusting the valve cal, see the Valve Cal section on page 62.
NOTE: Review the AccuFlow and AccuFlow HP and HP Plus Installation and Operation Manual for details on
initial settings and calibration information for boost pump control.
RESET VALVE CAL BUTTON
Select “Reset Valve Cal” button to reset the recommended value for the selected valve type.
MAX AND MIN PWM, PRESET PWM AND PWM FREQUENCY SETTINGS
Review the AccuFlow, AccuFlow HP, and AccuFlow HP Plus Installation and Operation Manual for details on initial
settings and calibration information for programming boost pump control.
PRESSURE CAL
A non-zero pressure cal value is required when controlling an AccuFlow HP or AccuFlow HP Plus system to ensure
that the ISOBUS product control node correctly engages the boost pump during anhydrous ammonia
applications. Two pressure transducers are required in HP Plus operation to engage the boost pump for higher
application rates.
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