Operation Guide 2804
" At Level 4, the display is disabled but timekeeping and other functionsTo enter the Power Saving Mode
continue to operate internally. Pressing any button causes theIn any mode (except while figures are flashing
Timekeeping Mode screen to appear for two or three minutes.on the display for input), hold down C for
Power saving indicator
" At Level 5, all functions are disabled. Functions are enabled once againabout two seconds.
after the rechargeable battery is charged, but anything previously stored in" This enters the Power Saving Mode, which
memory is lost. Because of this, you must set the current time and alarms,causes all figures (except Power Saving
and re-input Data Bank records after the rechargeable battery is charged.indicator) to disappear from the display.
" Leaving the watch in direct sunlight or some other very strong lightTimekeeping and other functions continue to
source can cause the battery power indicator to temporarily show abe performed internally, however.
reading that is actually higher than the battery level. The correct" Alarms, the Hourly Time Signal, and the
battery power indicator should appear after a few minutes.Power Saving Modebacklight are disabled while the watch is in
" Frequent backlight and alarm operations over a short period put athe Power Saving Mode.
heavy load on the battery, which can cause the battery power indicator" Pressing any button (except A) exits the
to flash, indicating that the backlight and alarm are disabled. NormalPower Saving Mode and enters the
operations should return after the battery recovers from the overloadTimekeeping Mode.
condition. The above condition can occur after about consecutive 200
backlight operations or about 360 alarm operations.
Reference
Charging Precautions
Certain charging conditions can cause the watch to become very hot.This section contains more detailed and technical information about
Avoid leaving the watch in the areas described below whenever chargingwatch operation. It also contains important precautions and notes about
its rechargeable battery.the various features and functions of this watch.
Also note that allowing the watch to become very hot can cause its liquid
crystal display to black out. The appearance of the LCD should becomeAuto Display
normal again when the watch returns to a lower temperature.Auto Display is a demonstration feature that continually changes the
Warning!contents of the digital display. Note that you cannot use any of the
Leaving the watch in bright light to charge its rechargeable batterywatchOs other functions while Auto Display is operating.
can cause it to become quite hot. Take care when handling the
watch to avoid burn injury. The watch can become particularly hotTo turn off Auto Display
when exposed to the following conditions for long periods.Hold down A for about two seconds until the watch beeps.
" On the dashboard of a car parked in direct sunlight
" Too close to an incandescent lampTo turn on Auto Display
" Under direct sunlight1. In any mode (except while figures are flashing on the display for input),
hold down C for about two seconds to enter the Power Saving Mode.
Charging Guide
2. Hold down A for about two seconds until the watch beeps. This
After a full charge, timekeeping remains enabled for up to about sixindicates that Auto Display is on.
months, while the watch is used under the conditions described below." Leaving the watch in a dark area can cause Auto Display operation to
Operating Conditionsstop. Normal operation should resume when the watch is again
"Watch is not exposed to lightexposed to light.
"1 backlight operation (2 seconds) per day" Auto Display cannot be turned on while the rechargeable battery is at
"20 seconds of alarm operation per dayLevel 4 or Level 5. Auto Display also turns off automatically whenever
the rechargeable battery drops to Level 4 or Level 5.
Charge Times
Exposing the watch to light for the periods shown below each day
Auto Return Features
restores the power used by the above operating conditions.
If you leave a screen with flashing digits or a cursor on the display for
two or three minutes without performing any operation, the watch
Exposure Level (Brightness)Approximate
automatically saves anything you have input up to that point and exits the
Exposure Time
setting screen.
Outdoor Sunlight (50,000 lux)5 minutes
Sunlight Through a Window (10,000 lux)25 minutesData and Setting Scrolling
Daylight Through a Window on a Cloudy Day50 minutesThe B and D buttons are used in various modes and setting screens
(5,000 lux)to scroll through data on the display. In most cases, holding down these
Indoor Fluorescent Lighting (500 lux)8 hoursbuttons during a scroll operation scrolls through the data at high speed.
" Stable operation is promoted by frequent charging.Initial Screens
Recovery TimesWhen you enter the Data Bank, World Time, or Alarm Mode, the data
The table below shows the amount exposure that is required to take theyou were viewing when you last exited the mode appears first.
battery from one level to the next.
Timekeeping
Exposure LevelApproximate Exposure Time
" The day of the week is automatically displayed in accordance with the
(Brightness)Level 5 Level 4Level 3 Level 2Level 1
date (year, month, and day) settings.
" The year can be set in the range of 2000 to 2039.
Outdoor Sunlight3183" The watchOs built-in full automatic calendar automatically makes
21 hoursallowances for different month lengths and leap years. Once you set
(50,000 lux)hours hours hours
the date, there should be no reason to change it except when battery
Sunlight Through a Window149413power drops to Level 5.
108 hours
(10,000 lux)hours hours hours
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping
Daylight Through a Window2818825
� � �
on a Cloudy Day (5,000 lux)hours hours hoursMode is also applied in all modes.
" With the 12-hour format, the P (PM) indicator appears on the display
" The above exposure time values are all for reference only. Actual requiredfor times in the range of noon to 11:59 p.m. and no indicator appears
exposure times depend on lighting conditions.for times in the range of midnight to 11:59 a.m.
" With the 24-hour format, times are displayed in the range of 0:00 to
23:59 without any indicator.
World Time
" GMT differential is calculated by this watch based on Universal Time
Coordinated (UTC) data.
" The seconds count of the World Time is synchronized with the
seconds count of the Timekeeping Mode.
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ACEC
CASIO
