2-2-20 Section 2: Using Digital Instruments
ST290 Instrument System Owner’s Handbook
Enabling alarms
To enable or disable an alarm:
1. In the Alarms chapter, select the required alarm page.
The alarm page shows either OFF to indicate the alarm is disabled, or
an alarm level value to indicate the alarm is enabled.
2. Use the button as necessary, to set the alarm either:
•OFF
or
• Soitshowsa level value. Withthis setting, an activated alarm will
sound at the ST290 system.
or
• So it shows a level value, and an A indicator. With this setting, an
activated alarm will sound both at the ST290 system and at an
Auxiliary Alarm, when connected to the DPU.
Setting alarm levels
To set an alarm level:
1. In the Alarms chapter, select the required alarm page.
2. Hold down the button for 1 second, to enter Edit mode. The cur-
rent level for this alarm flashes.
3. Use the or button, to set the alarm level as required.
4. Hold down the button for 1 second, to leave the edit mode.
Environment chapter
The chapter menu title is ENVIRONMENT. The pages are summarized in
Table 2-10 .
Table 2-10: ENVIRONMENT chapter pages
Page content Description
SEA TEMP Sea temperature, in °C or °F
TIDE SET Tide set (calculated), in degrees
TIDE RATE
Tide rate (calculated), in KTS
, K/H or MPH
SUNRISE Sunrise time
TWILIGHT AM Morning twilight time
81183_2 S2 chap 2.fm Page 20 Wednesday, May 7, 2003 9:41 AM
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