Navitron NT888G MK2, Руководство по эксплуатации

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NT888G MK2 AUTOPILOT OPERATING MANUAL
2.35 Optimising the Off Heading & Course Comparator Alarms … (Continued).
Alarm Trip Level.
The specified limit (Alarm trip level) is operator selectable at 2° to 30° in 2° steps – or
can be switched OFF - via entry to the
LIMITS Menu.
NB. When in TRACK steering mode using HTC sentence data received from an
Approved Track Control System, the Off Heading Alarm limit may be set to a value
demanded by the Track system – or switched OFF - if ordered.
Alarm Cancellation.
The audible/visual display alarm can be cancelled by use of the alarm TEST key but
is programmable via the SET UP Menu in two categories:-
(i) OHA DELAY – Parameter No. 68 in the Set Up Menu, this can be
programmed from 10 to 60 seconds in 2 sec steps
as the delay time from exceeding the alarm trip level
to generation of audible and visual alarms.
This feature prevents unnecessary alarms due to
natural yaw/periodic motion of the vessel.
(ii) OHA ALARM TIMEOUT – Parameter No. 69 in the Set Up Menu, this can
be programmed from 30 to 120 seconds in 1
second steps as the delay time to allow the
vessel to turn to a new course when ordered by
the Autopilot.
If required, the audible alarm can also be permanently switched OFF via LIMITS
Menu.
To alter/set OHA Delay or OHA Alarm Timeout:-
a. Simultaneously press the “ CANCEL ” and “ CONFIRM ” keys for 5 seconds
until the Set Up Menu is displayed with a blue cursor highlighting the Set
Up parameter currently selected.
b. Rotate the Autopilot Set Course Control to move the cursor to parameter
number 68 ( OHA DELAY ) or 69 ( OHA TIMEOUT ).
c. Use the rotary (+/-) illum. control to set time (secs) as required.
To set the OHA Trip Level or switch the Off Heading Alarm OFF:-
d) Use the “ LIMITS ” key to enter the Limits Menu.
e) Use the “ LIMITS ” key again to select “ O.H.A. ” box followed by flashing
current value ( 2° to 30° or OFF ).
f) Use the rotary (+/-) illum. control to set as required.