NorthStar Navigation Echo Sounder NorthStar 491 - Manual (Page 65)

491 Echo Sounder Operations Manual Page 61
Setting the upper
and lower
temperature limits
You can set the upper and lower temperature limits. When the
water temperature is either inside or outside these limits, the
temperature alarm will sound.
To set the upper temperature limit:
1. At the TEMPERATURE ALARM window, press SET UPPER
LIMIT.
The upper limit window is highlighted in black.
2. Press the CURSOR PAD up or down to set the
temperature, or use the KEYPAD to manually enter the
desired temperature.
The temperature is displayed in the tab just below the
SET UPPER LIMIT key.
To set the lower temperature limit:
1. At the TEMPERATURE ALARM window, press SET
LOWER LIMIT.
The lower limit window is highlighted in black.
2. Press the CURSOR PAD up or down to set the
temperature, or use the KEYPAD to enter the desired
temperature.
The temperature is displayed in the tab just below the
SET LOWER LIMIT key.
Setting inside or
outside
temperature limits
If you set the upper and lower temperature limits as inside
limits, the temperature alarm sounds when the temperature is
detected within these limits. If you set these limits as outside
limits, the temperature alarm sounds when the temperature is
detected outside of these limits.
Press INSIDE/OUTSIDE LIMITS on the TEMPERATURE ALARM
window to switch between the inside and outside settings. The
current setting is displayed in the tab just below the INSIDE/
OUTSIDE LIMITS key.
Turning the
temperature alarm
on and off
To turn the alarm on, at the TEMPERATURE ALARM window,
press TURN ALARM ON. To turn the alarm off, press TURN
ALARM OFF.