Temp. Range High; Temp. Range Low - Raymarine DSM25 Owner's Handbook Manual

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The temperature unit used (°C or °F) is dependent upon the Units parameter set in
the System Set Up menu. The default setting is OFF.

Temp. Range High

Use the rotary knob or trackpad up/down keys to increment/decrement the upper
threshold for the Temp Alarm. If a temperature above this value is detected, the
Temp. Alarm is triggered. You cannot set the Temp. Range High setting to be lower
than Temp. Range Low.

Temp. Range Low

Use the rotary knob or trackpad up/down keys to increment/decrement the lower
threshold for the Temp Alarm. If a temperature below this value is detected, the
Temp. Alarm is triggered. You cannot set the Temp. Range Low setting to be
higher than Temp. Range High.
DSM25 Owner's Handbook