Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch where
it is not exposed to light causes the battery to run down.
Make sure the watch is exposed to light as much as possible.
When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright light.
•You should try to keep the watch outside of your sleeve
as much as possible. Charging is reduced significantly if
the face is only partially covered.
•The watch continues to operate, even when it is not exposed to light. Leaving the
watch in the dark can cause the battery to run down, which will result in some watch
functions to be disabled. If the battery goes dead, you will have to re-configure watch
settings after recharging. To ensure normal watch operation, be sure to keep it
exposed to light as much as possible.
(Converts light to
Some or all
Battery charges in the light.Battery discharges in the dark.
•The actual level at which some functions are disabled depends on the watch model.
•Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fluorescent lighting
•Be sure to read “Power Supply” for important information you need to know
when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
•See “Power Saving Function” for more information.
About This Manual
•Button operations are indicated using the letters shown
in the illustration.
•Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
•Press C to change from mode to mode.
•In any mode, press B to illuminate the display.
Battery Level Indicator
World Time Mode
Hand Setting Mode
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates
its time setting accordingly. The time calibration signal
includes both Standard Time and Daylight Saving Time
(summer time) data.
•This watch is designed to pick up the time calibration
signal transmitted from Anthorn, England and the signal
from Mainflingen, Germany.
Day of week
Current Time Setting
This watch automatically adjusts its time setting in accordance with a time calibration
signal. You can also perform a manual procedure to set the time and date, when
•The first thing you should do after purchasing this watch is to set your Home City,
which is the city where you will normally use the watch. For more information, see
“To set your Home City” below.
•When using the watch in an area that is outside of the range of the transmitters in
Anthorn and Mainflingen, you need to manually adjust the time as required. See
“Timekeeping” for information about manual settings.
•The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is automatically adjusted whenever you change the digital
setting. See “Analog Timekeeping” for more information.
To set your Home City
1. In the Timekeeping Mode, hold down A until the
transmitter indicator (
) starts to flash,
which indicates the setting screen.
•If the displayed transmitter indicator shows something
AT, use D to display AT before
advancing to the next step.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
2.Press C to display the city code setting screen.
3. Use D (east) and B (west) to select the city code you
want to use as your Home City.
•The following are the city codes for major cities in the
Western Europe time zones.
PAR and BER:Paris, Berlin, Milan, Rome,
Amsterdam, Hamburg, Frankfurt,
Vienna, Barcelona, Madrid
4. Press A twice to exit the setting screen.
•The first press of A displays the 12/24-hour setting screen. Pressing A again exits
the setting screen.
•The second hand will advance at high speed to the correct position in accordance
with seconds count of the digital time, and resume normal movement from there.
•Normally, your watch should show the correct time as soon as you select your Home
City Code. If it does not, it should adjust automatically after the next auto receive (in
the middle of the night). You can also perform manual receive or you can set the time
•If you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting.
•See “Transmitters” for details about the transmitter indicator.
To display the digital time and last signal screen
•In the Timekeeping Mode, press A to cycle through the digital time screens as
•In the Timekeeping Mode, press D to display the last signal screen. The last signal
screen shows the date and time of the last successful time calibration signal
Last Signal Screen
Day of week
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
With auto receive, the watch automatically picks up the time calibration signal five
times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more
information, see “About Auto Receive”.
Manual receive lets you start time calibration signal reception with the press of a
button. For more information, see “To perform manual receive”.
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