MEGA Corp. MSC-OPS-1 - Manual (Page 19)

MSC/MST-OPS-1
31 Dec 2013
SECTION 2
System Description
2-10
The system warns the operator of all malfunctioning
system functions and provides full manual control of
all spray system functions in the event of an AUTO
mode failure. All automatic system protection
features of low water level conditions, no-flow
conditions and water pump soft start/stop feature
still operate normally in the AUTO mode.
GPS EXTENDED FUNCTION DESCRIPTIONS
AUTO – This function has priority over intermittent
mode. The intermittent light will illuminate steadily
when operating conditions are met and AUTO is ON.
AUTO enables vehicle speed signal from the GPS
module to activate the speed sensing mode, and
operates the spray system based on RATE and SPEED
adjustments. Pulse will begin when the AUTO
function requests reduced volume.
Near or below 4.8 KPH/3 MPH, AUTO will switch to
INTERMITTENT mode and discharge functions may
operate continuously or ramp down the water pump
to OFF. When vehicle speed rises above 4.8 KPH/3
MPH, AUTO will resume control of the system.
RATE – Is the distance traveled/time for spray head
ON cycle.
•
Knob turned counterclockwise reduces ON
distance/ ON time
• Knob turned clockwise increases ON distance/
ON time
SPEED – Above what vehicle speed the command is
sent for maximum flow of all selected discharge
functions (spray heads). Below this vehicle speed,
timed cycles and/or reduced water volume flow
occur.
The scale for the SPEED function is 0 KPH/0 MPH (Full
LEFT) to 48 KPH/30 MPH (Full RIGHT).
When vehicle speed goes below the set SPEED,
application rate of water discharged will be either
pulse the requested discharge functions and/or
reducing the number of discharge functions based
on the RATE selected.
IF vehicle speed is GREATER than set SPEED the RATE
has little or no effect on water discharge. Typically all
requested pressure discharge functions are ON and
no timing cycle.
Reduced Volume Mode – Reduction in discharge
volume by reducing the number of spray heads
requested to activate.
•
If 4 rear spray heads are requested, reduced
volume allows only the 2 outer spray heads to
turn ON and the 2 center spray heads are OFF.
• If 3 rear spray heads are requested 1 spray head
will be OFF, typically the center head adjacent to
the outer head requested.
• If 2 spray heads are requested 1 spray head will
be OFF typically the center spray head unless no
center spray heads are requested, then NO spray
heads will be OFF.
Pulsing – Reference to Pulse Width Modulation or
ON/OFF cycle.