Raven AccuFlow, Installation & Operation Manual

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Manual No. 016-0171-496 Rev. C 47
AccuFlow HP™ Calibration and Operation
13.
Once the system pressures have stabilized, verify that pressure gauge readings on the AccuFlow system
and the nurse tank are matching. If the pressure readings do not match, one of the gauges may be
defective and should be replaced.
14.
Enter the pressure gauge reading on the AccuFlow system in the pressure cal field on the control
console (e.g. Raven Envizio Pro II field computer).
Note:
The pressure cal is typically only set once per application season to calibrate the transducer. The
pressure cal value will revert to zero once entered and does not need to be set repeatedly during
an application season. This value must be set to the gauge pressure of the AccuFlow system or
tool bar, not the anhydrous tank pressure.
15.
Turn the nurse tank shut-off valve to fully open. The AccuFlow system is now charged and ready for
operation.
Verifying AccuFlow HP™ Operation
Once the AccuFlow system is charged, the system is ready for the application of anhydrous ammonia to the
field(s). The following items should be checked periodically to ensure proper operation of the AccuFlow system
and application of anhydrous ammonia:
1.
Verify that the implement/boom widths, speed cal, meter cal, valve cal, and rate cals have been
programmed correctly on the console (refer to the console’s Operation manual for details).
2.
Toggle the console to manual control mode.
3.
Toggle the master switch to the off position.
4.
Toggle the switch for section 1 (boom 1) on. If a multi-manifold system is in use, toggle all sections on.
Toggle any section switches not in use to their off positions.
5.
With the master switch in the off position, drive at the target application speed to verify the speed readout
on the control console.
6.
With applicator knives in the ground, toggle the master switch to the on position.
7.
While driving at the target application speed, manually adjust the flow with the INC/DEC switch until the
target rate is achieved.
Note:
The manifold pressure must be greater than 10 PSI [68 kPa] to ensure proper operation.
8.
Toggle the console to automatic mode. In automatic mode, the console will adjust the control valve
automatically to maintain the target rate regardless of vehicle speed.
9.
If the NH
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Rate Control product is not capable of maintaining the target rate, enable boost pump control:
a.
Observe the actual system operating pressure displayed on product 2.
Note:
When operating the AccuFlow HP system with a Viper Pro field computer, turn product 2 to
manual control mode to display the actual pressure of product 2 on the Viper Pro main screen.
b.
Start by setting product 2 rate cal approximately 5 to 10 PSI [34 to 68 kPa] higher than the operating
pressure observed.
c.
Set the tractor control valve (continuous flow) to provide flow to the hydraulic PWM control valve.
d.
Set product 2 to automatic control mode.