Mega MAC - Page 30

MAC/MTT-OPS-1
26 FEB 2019
SECTION 2
System Description
2-19
• The scale for this F2 function is 0 KPH/0 MPH
(Full LEFT) to 48 KPH/30 MPH (Full RIGHT).
• If the vehicle speed is GREATER than the F2 dial
setting, the F1 dial has little or no effect on
water discharge. Typically in this case, all
requested pressure discharge functions are ON
and there is no timing cycle; pressure dis-
charge functions operate continuously.
R
EDUCED 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, in
which case NO spray heads will be OFF).
P
ULSING – Reference to Pulse Width Modulation or
ON/OFF cycle.
Distance-Based (Pattern-Based)
If both the AUTO and INTMNT switches are ON,
then the GPS mode is distance-based, or “pattern-
based”. Spray head functions operate to create wet
and dry patches, the lengths of which are
controlled by the F1 and F2dials, as follows:
F1
– Adjusts the length of the wet patches on a
linear scale from 10 m (FULL CCW) to 100 m (FULL
CW).
F2
– Adjusts the length of the dry patches on a
linear scale from 10 m (FULL CCW) to 100 m (FULL
CW).
In version 4.2, the minimum length of the dry
patch is 0 m, whereas in version 4.0, the minimum
dry patch length is 10 m. Verify your system’s
current firmware version before operating in this
mode.
The wet and dry patches will form a checkerboard
pattern. The activated left and right spray heads
will alternate spraying water to produce wet and
dry sections in the following
sequence:
If the system is PAUSED, spray head functions will
resume beginning with a dry patch once
unpaused. Distance-Based (Pattern-Based)
VEHICLE MOVEMENT
Begins with dry patch
(distance set by F2); all spray
heads OFF
Selected right spray heads
turn ON (distance set by F1)
All spray heads turn OFF
(distance set by F2)
Selected left spray heads turn
ON (distance set by F1)
All spray heads turn OFF
(distance set by F2)
Selected right spray heads
turn ON (distance set by F1)
DRY
WET
WET
DRY
DRY
WET