Hardi HC 5500 SPRAY BOX III, Instruction Book

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3 - Description
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DynamicFluid4 pressure regulation
Traditional fluid regulation starts, when the nozzles are opened.
With DynamicFluid4 (DF4), the regulation is a continuous process, even if the nozzles are closed. Two ceramic (or plastic)
discs regulate the pressure and ensures quick reaction and zero leakages. Sprayer speed, PTO speed and number of spray
sections activated are parameters used, and the benefit is more precise application rates from the second the sprayer begins
spraying.
The DynamicFluid4 use feed forward technology based on 5 sensors, which feed the Spray Box III with data necessary for
optimal regulation. It auto-primes the spray boom at start-up and moves the regulation valve towards its final position
immediately after the operator makes changes. For example, when section valves are opened or closed, the regulation valve
is started at the same time as the section valve motors are started. This prevents overpressure situations e.g. after running
empty and refilling of main tank.
The 5 sensors are also back-up for each other and ensures that the system can continue regulation, even if one or more
sensor signals fails.
Sensors for DF4:
•
Sprayer speed (km/h)
•
Flow (l/min)
•
Pressure (bar)
•
Pump speed (rpm)
•
Regulation valve opening angle (°)
The DynamicFluid4 pressure regulation features:
•
Very fast and accurate regulation, when all sensors are working ok, setup in menus are correct and pump, filters and
valves are in good condition.
•
Quick reacting valve, when sections are turned ON/OFF and at speed changes.
•
Optimized for different PTO systems.
•
Nozzle surveillance. No setup or tuning required for nozzle change.
•
Warning in display, if failures occur on boom plumbing, such as severe clogging of line or nozzle filters or large leakages
on hoses and fittings.
•
All functions work through with degraded performance (Limp-home modes), if:
Faults occur in fluid system, e.g. pump defects, clogged filters, leaking valves.
Sensor failure appear on pressure sensor, flow sensor or pump sensor.
There is a wrong setup of sprayer data in the menus.
•
Emergency mode, if angle sensor or speed sensor fails.