Hardi NAVIGATOR 4000, Instruction Book

Page: 18 / 116

3 - Description
16
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 discs regulate the pressure and ensure quick reaction and zero leakages.
Used parameters are sprayer speed, PTO speed and the number of activated sections. The benefit is more precise application
rates from the second the sprayer begins spraying.
The DynamicFluid4 uses feed forward technology based on 5 sensors, which feed the JobCom computer with data
necessary for optimal regulation. It auto-primes at start-up and starts to move the valve towards the 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 avoids overpressure situations e.g. after running
empty and refilling of the main tank.
The 5 sensors are also back-up for each other, ensuring that the system can continue regulation - even if one or more sensor
signals fails. The applied sensors measure:
•
Sprayer speed (km/h)
•
Fluid flow (l/min)
•
Fluid pressure (bar)
•
Pump speed (rpm)
•
Regulation valve opening angle (°)
Features for DF4
•
Very fast and accurate regulation when all sensors are 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 AutoSectionControl feature that predict boom sections to open and optimized nozzle pressure.
•
Optimized for different PTO systems.
•
Nozzle surveillance. No setup or tuning is required for nozzle change.
•
Warning in display, if failures occur on boom plumbing, such as severe clogging of line or nozzle filters or because of
large leakages on hoses and fittings.
•
All functions work through with degraded performance (Limp-home modes), if:
•
Failures occur in fluid system, e.g. pump defects, clogged filters or leaking valves.
•
Failures occur 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 sprayer speed sensor fails.
Screen icons
The sprayer driver selects one of three modes: Auto, Manual or Increment Steps. The sprayer computer detects one of three
regulation modes: Drop, Question Mark or Calibration Jug. This makes 9 modes in total.
Auto Manual Increment Steps
Automatic Volume
Rate. Manual Pressure
Control. Volume Rate is
changed in steps as
%-up or %-down.
Press a button on the controller box to select regulation mode.
Calibration Jug
Flow to the section valves.
Nozzle size (l/min at 3 bar) has been calculated.
Drop
No flow to the section valves.
The pump is not started, or the pressure SmartValve is set to another function than
spraying.
Question Mark
Flow to the section valves, but pressure and flow has not yet been stable, therefore the
nozzle size (l/min at 3 bar) has not yet been calculated.
The system uses the last saved nozzle size.