Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully.
Your watch is shipped with it Auto Display feature (which continually changes the
contents of the digital display) turned on. Calibration signal reception is disabled while
Auto Display is turned on.
Press any button to turn off Auto Display and return to the Timekeeping Mode.
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 in order to perform operations in
each mode. Further details and technical information
can be found in the “Reference” section.
Countdown Timer Mode
Stopwatch ModeAlarm Mode
World Time Mode
•Press C to change from mode to mode.
•In any mode (except when a setting screen is on the display), press B to illuminate
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates
its time setting accordingly.
•Supported time calibration signals: United States (Fort
Collins), England (Rugby).
Current Time Setting
This watch adjusts its time setting automatically in
accordance with a time calibration signal. You can also
perform a manual procedure to set the time and date,
•The first thing you should do after purchasing this watch
is to specify your Home City (the city where you
normally will use the watch). For more information, see
“To specify your Home City”.
Month – Day
Day of week
(Hour : Minutes Seconds)
•When using the watch outside the areas covered by the time signal transmitters, you
will have to adjust the current time setting manually as required. See “Timekeeping”
for more information about manual time settings.
•The U.S. time calibration signal can be picked up by the watch while in North
America. The term “North America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
To specify your Home City
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press D(east) and B(west) to select the city code you
want to use as your Home City.
•Time calibration signal reception is supported when
any one of the city codes shown in the table below is
selected as your Home City.
U.S. SignalU.K. Signal
3. Press A to exit the setting screen.
•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
operation (in the middle of the night). You can also perform manual receive or you
can set the time manually.
•The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see “Home
City Codes and Transmitters”.
•Under factory default settings, auto receive is turned off for all of the following city
codes: HNL (Honolulu), ANC (Anchorage), ATH (Athens), and MOW (Moscow). For
details about turning on auto receive for these city codes, see “To turn auto receive
on and off”.
•You can disable time signal reception, if you want. See “To turn auto receive on and
off” for more information.
•See the maps under “Reception Ranges” for information about the reception ranges
of the watch.
•If you are in an area that does not use Daylight Saving Time (summertime), turn off
the DST setting.
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 receives the time calibration signal automatically up to
six times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.
•When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o'clock side facing towards a window.
Make sure there are no metal objects nearby.
•Make sure the watch is facing the right way.
•Proper signal reception can be difficult or even impossible under the conditions listed
•Signal reception normally is better at night than during the day.
•Time calibration signal reception takes from two to seven minutes, but in some
cases it can take as long as 14 minutes. Take care that you do not perform any
button operations or move the watch during this time.
or a mobile
•The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Home City Code
HNL*, ANC*, YVR,
LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO,
MAD, PAR, ROM, BER,
STO, ATH*, MOW*
Fort Collins, Colorado
(the United States)
Home City Codes and Transmitters
* The areas covered by the HNL, ANC, ATH, and MOW city codes are quite far from
the time calibration signal transmitters, and so certain conditions may cause
problems with signal reception.
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