CHAPTER
5
AccuFlow™ HP+ Calibration and Operation: Charging the AccuFlow™ HP+ System and Calibrating the Pres-
CHAPTER 5
ACCUFLOW™ HP+
CALIBRATION AND OPERATION
This chapter contains information on calculating or adjusting calibration values for the AccuFlow HP+ system.
These values must be programmed on the console providing product control. Refer to the console Installation and
Operation manual for detailed programming instructions.
The HP+ system requires a CANbus system with a Raven product control node.
• The HP+ system uses a 2-stage control. Stage 1 opens the control valve as needed to achieve target rate. Once
the valve reaches the full open position, stage 2 starts controlling the pump and ramps it to reach the target
rate (assuming tractor hydraulics are on). The process is reversed as the flow demand decreases.
CHARGING THE ACCUFLOW™ HP+ SYSTEM AND CALIBRATING THE
PRESSURE TRANSDUCERS (PRESSURE CAL)
The following procedure will step through the proper method for connecting and charging the AccuFlow system.
1. Verify that all hoses, fittings, and mounting bolts are securely fastened or tightened.
2. Verify that the AccuFlow flow meter is connected to the flow meter connector on the flow meter cabling.
3. Verify that the AccuFlow control valve is connected to the flow or product cable connector.
4. Verify the on/off valve(s) are connected to the on/off connectors on the flow meter cabling.
5. Verify pressure transducer connections (P1 connected to transducer near pressure gauge, P2 connected to
transducer on Vortex cooler).
6. Toggle the master switch to the off position.
7. Verify that the motorized control valves are in the ‘off’ position.
CAUTION
To avoid damage to boost pump seals, do not
run the boost pump dry. Be sure to shutdown the
boost pump when no anhydrous ammonia is
flowing through the pump or when the nurse
tank is empty.
NOTICE
Carefully read all directions in this section before
beginning this procedure and make sure that all
steps are completed before proceeding.
Review the safety requirements associated with
the handling and application of anhydrous
ammonia with a local NH
3
supplier.
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