MAC/MTT-OPS-1
26 FEB 2019
SECTION 2
System Description
2-10
Speed Based Program Mode
Vehicle speed input is
acquired from the MEGA
provided GPS system that
relays the vehicle speed to the
controller. The controller will
determine the watering rate
Pulse Width Modulation
(PWM) for the selected spray heads. PWM is the
pulsing of spray heads to deliver a desired
coverage percentage of water that has been
selected through the RATE setting. Automatic
water reduction will occur before the PWM mode
begins, this is when the unit turns OFF the 2 inner
spray heads prior based on the SPEED setting
selected. As the vehicle speed is reduced the PWM
pattern will begin, this is where it pulses the 2
outer spray heads to achieve the requested
percentage of water coverage (RATE). (System,
water pump and at least one spray head must be
on and GPS must have satellite lock.)
Coverage Percentage Setting
Using the ‘WET +’ and ‘WET -’ function buttons the
operator can adjust the coverage percentage of
the Speed Based Program Mode.
Press to advance RATE setting
MORE water coverage percentage.
Press to advance RATE setting
LESS water coverage percentage.
Program Speed Setting
Using the ‘DRY +’ and ‘DRY -’ function buttons the
operator can adjust the MAXIMUM SPEED setting
for the Speed Based Program Mode.
Press to advance setting
INCREASE maximum program speed
Press to advance setting
DECREASE maximum program
speed
The speed based program mode will only control
the four (4) rear spray heads, all other functions
will remain in manual selection mode. All other
functions can be activated manually while in
Speed Based Programming mode but will not be
controlled through the speed based program
settings. All selected spray heads OFF at 4.8 kph (3
mph) and less.
Faults:
No GPS Lock - Flashing Red/
Green
No connection to GPS receiver -
Flashing Red/Blue
Button Color Coverage
White 15%
Blue 30%
Yellow 50%
Green 75%
Magenta 90%
Button Color
Speed
White
8 KPH/5 MPH
Blue
16 KPH/10 MPH
Yellow
24 KPH/15 MPH
Green
32 KPH/20 MPH
Magenta
40 KPH/25 MPH
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