Humminbird 580 - Manual (Page 85)

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Low Battery Alarm
Low Battery Alarm sounds when the input
battery voltage is equal to or less than the menu setting. The battery alarm will
only sound for the battery that is connected to the Fishfinder. The Low Battery
Alarm should be set to warn you when the battery voltage drops below the
safety margin that you have determined. For instance, if you are running a
trolling motor (battery operated), you would want to set the Low Battery Alarm
to sound before the battery voltage drops too low for it to be used to start your
main, gasoline-powered engine.
To change the Low Battery Alarm setting:
1. Highlight Low Battery Alarm on the Alarms main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Low
Battery Alarm setting. (Off, 8.5V - 13.5V, Default = Off)
Temp Alarm
Temp Alarm sounds when the water temperature
detected by the Fishfinder reaches the Temp Alarm setting, which is either set
in degrees Fahrenheit or Celsius [International Models only]. For example, if
the Temp Alarm is set to 58 degrees Fahrenheit, and the water temperature falls
from 60 degrees to 58 degrees, the Temp Alarm will sound. Similarly, if the
water temperature rises from 56 degrees to 58 degrees, the Temp Alarm will
also sound.
To change the Temp Alarm setting:
1. Highlight Temp Alarm on the Alarms main menu.
2. Use the LEFT or RIGHT 4-Way Cursor Control keys to change the Temp
Alarm setting. (Off, 33-120 [Fahrenheit], 0-50 [Celsius], Default = Off)