Casio 2839 Operation Manual

MA0312-EA

Power Saving

Power Saving causes the watch to automatically enter a sleep state to save power whenever the watch is left in the dark. The Power
Saving feature is turned on at the factory.
• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.
❚ How the sleep state works
• Display sleep state
The display sleep state is triggered whenever the watch is left in
the dark for about one hour between the hours of 10 p.m. and 6
a.m.
• The display goes blank and a SLEEP indicator flashes on the
display. Alarms and the hourly time signal continue to operate
normally while the watch is in the display sleep state.
• The watch does not enter the sleep state if it is in the
Stopwatch Mode.
SLEEP Indicator
• Function sleep state
The function sleep state is triggered whenever the watch is left
in the dark for six or seven days.
• The SLEEP indicator stops flashing and remains on the display.
Alarms and the hourly time signal are also disabled while the
watch is in the function sleep state. Time calibration signal
reception is not performed while the watch is in the function
sleep state.
• Timekeeping continues internally in the function sleep state.
Modes and Display Screens
Timekeeping Mode
❚ Time Stamp (Time Memo)
Holding down the button for about one second
in the Timekeeping Mode creates a record
containing the current date (month and day) and
time (hour, minute, second) in memory. Storage
of the record is indicated by the watch beeping.
• The display shows the contents of the record
for about two seconds, after which the normal
Timekeeping Mode display reappears.
• See "Viewing Time Stamp (Time Memo) Data"
for information about recalling Time Stamp
records.
Record number flashes
for about three seconds.
Recorded hour
and minute
Current time
Operation Guide 2839
❚ To recover from the sleep state
Place the watch in an area that is well-lit, press any button, or
angle the watch toward your face to illuminate the display using
the Auto Light (see "To illuminate the display").
• It can take up to two seconds before display figures re-appear
after you place the watch in a well-lit area.
❚ To turn Power Saving on and off
Use the procedure under "Configuring Time and Date Settings
Manually" to turn Power Saving on or off.
• The watch automatically enters the sleep state if left in a
desk drawer or some other dark place for a long time while
Power Saving is turned on.
Day of the Week Month, Day
PM indicator
(no indicator
Hour, Minute,
for AM)
Second
(Light)
❚ Days of the Week
SUN: Sunday MON: Monday TUE: Tuesday
WED: Wednesday THU: Thursday FRI: Friday
SAT: Saturday
• The watch will automatically revert to the Timekeeping Mode if you leave it in the Alarm Mode or Recall Mode without performing any
operation for about two or three minutes.
• In the Alarm Mode, an alarm number, the snooze alarm indicator (SNZ), or the hourly time signal indicator (SIG) identifies the currently
displayed screen.
World Time Mode
City Code
Stopwatch Mode
Mode Indicator
Recall Mode
Mode Indicator
Alarm Mode
Alarm Number
1