Oceanic DataMax Pro, Owner'S Manual

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TURNING OFF THE AUDIBLE ALARM
A special Access Mode allows you to turn the Audible Alarm on or off.
You can enter this mode by first accessing Dive Log Mode. After Dive Log
Mode displays a primary screen for the most recent dive, the secondary
screen for that same dive appears. During this secondary screen, press and
hold the activation button for at least six seconds to enter the Access Mode.
Keep holding the activation button and watch the display. You will see a
scrolling display of the words “ON” and “OFF” every three seconds. Which-
ever command is displayed when you release the activation button will be
issued to the DataMax Pro. If you release during display of the word “ON”,
the Audible Alarm will be accompanied by one “Beep.” Release during
display of the word “OFF” will result in a “Double Beep.” Ten minutes after
a dive another command “EA” is displayed along with ON and OFF. Release
during the “EA” command will enter an External Access Mode used during
manufacture to calibrate the computer. The EA mode is not user accessible.
WARNING: Turning off the audible alarm disables an impor-
tant tool for preventing decompression sickness or low air
emergencies. Oceanic does not recommend the disablement of
the audible alarm for any purpose.