micro-trak DUAL CONTROL MT-3405D, Справочное руководство

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Appendix M
Overview of additional VRA features for the MT-3405D
1. VRA STATUS INDICATOR:
This is useful to verify that the VRA controller is communicating
with the console.
• Turn rotary dial to RATE position.
• Use ‘CONT SEL’ button to select either controller 1 or 2
for viewing VRA status.
• Ensure the selected controller (1 or 2) has its switch in
the “AUTO” position.
The left most display always shows the application rate
UNTIL some VRA command is received, after which it only
display the current VRA status as follows:
The “PC” reminds user that this is the PC/VRA status.
Any combination of the lowercase letters (c, d, b) may appear,
indicating the following status:
• ‘c’ = console has received a Target Rate command from
the computer (doing VRA).
• ‘d’ = computer has requested data from the console
(recording “as applied” data).
• ‘b’ = computer sent a remote boom on/off command to
the console (auto section control).
The VRA status message is shown as long as the rotary knob
is turned to ‘RATE’, and ‘AUTO’ switch position are selected.
Pressing CONT SEL causes the normal display to return to
view, until the next command is received from the PC.
HERE ARE SOME OTHER USEFUL VRA-STATUS FEATURES:
• There is a dot just ahead of each of the (.c .d .b) that
blinks ON for 1/2 second, each time that particular
command is received.
• You can independently check VRA status for either
controller 1 or 2 by pressing the “CONT SEL” button
while in the RATE position.
• If you see the entire message flashing, it is a reminder
that the selected controller is currently in “VRA Override”
mode. Once the mode is exited, then the message stops
flashing.
2. VRA OVERRIDE:
Remember that when in VRA mode and the console switch
is set to ‘AUTO’, the GPS/Mapping computer is in control and
consequently the console’s adjust rate buttons are disabled.
However, sometimes you may encounter conditions in the
field where you want to apply more or less than what is
prescribed. The MT-3405D console provides two different
methods to “override” the prescribed application rate (for
either Ch1 or Ch2).
MANUAL OVERRIDE:
Simply toggling the switch to the “MAN” position allows the
operator to override the currently prescribed VRA target rate
(or even a Target “Hold’ condition: TargetRate=0). So now
the operator can use the triangular adjust rate buttons to
manually adjust the servo valve, which in turn changes the
rate. Note that the operator has to manually adjust the rate
to compensate for any changes in speed or flow.
To exit “manual-override” and return to VRA control, simply
move the switch back to “AUTO”
AUTOMATIC OVERRIDE:
This method allows the operator to “override” the VRA
prescription and still have automatic control of the rate.
To enter “auto-override” press and hold either one of the
tria or - buttons for one second or longer, after which
the following applies:
•
The ‘AUTO’ icon starts flashing to indicate the “auto-
override” condition.
(NOTE: If rotary dial is set to
“RATE”, the VRA Status message also flashes).
• The rate now consists of the last VRA prescription rate
PLUS (or MINUS) the adjust amount.
• The Adjust buttons (tria or -) function as they
normally do when in AUTO: increase or decrease the
target rate by the “AdjustRate” amount.
To exit “auto-override” and return to VRA control, press
either the (+ or -) for one second or more.
NOTE: WHILE IN OVERRIDE, the Dual Controller will not
miss any new commands sent by the GPS/Mapping
Controller. They are simply ignored until the user toggles
the override off, at which point the most recent commands
are resumed.
WIDTH
CAL
FLOW
CAL
MIN
FLOW
ADJUST
RATE
TARGET
RATE
SPEED
CAL
INLINE
BYPASS
TEST
SPEED
VOLUME /
MINUTE
DISTANCE
AREA /
HOUR
VOLUME
(1) (2) (3)
RATE SPEED
AREA
(1) (2) (3)
CONTROLLER 1
TANK
___
CONTROLLER 2
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