Oceanic ATOM 2.0 Operating Manual - page 22
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SET MAIN TIME
This Mode allows the Date and Time of Day to be set which will
also serve as the basis for ALTERNATE TIME values.
There are 3 Time Set screens - Set Hour Format, Set Time of Day,
and Set Date.
NOTE: MAIN TIME must be selected as the Local
Default Time in order to set the Time and Date.
Sequence of Time/Date settings:
Hour Format screen > Time screen (Hour > Minute) > Date
screen (Year > Month > Day)
Day of the Week is set automatically when the Date is set.
Depressing and holding the M button at any time for 2
seconds and if no button is pressed during a period of 2
minutes, the unit will revert to the MAIN TIME screen.
While the MAIN TIME screen is being displayed, pressing the A
and S buttons simultaneously for 2 seconds will access the Set
Hour Format screen displaying the graphic HOUR, symbol
TIME, and the Hour Format Set Point 12 or 24 flashing (Fig. 10).
Fig. 10 - SET HOUR
FORMAT