Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully and keep it on hand for later reference
• This watch does not have a time zone that corresponds to the Greenwich
Mean Time differential of –3.5 hours. Because of this, the radio-controlled
timekeeping and World Time functions will not display the correct time for
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright
• Be sure to read "Power Supply" for important information you need to know
when exposing the watch to bright light.
If the digital display of the watch is blank...
Power saving on indicator
• Press C to change from mode to mode.
• In any mode, press B to illuminate the face of the watch.
• The Battery Level Screen shows the current battery level. See "Battery Power
Levels" for more information.
Radio-controlled Atomic Timekeeping
Day of week
Current Time Setting
This watch automatically adjusts its digital time setting 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 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 outside the range of the U.S. transmitter, you have to adjust
the current time setting manually as required. See "Timekeeping" for more
information about manual time setting.
• 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
• 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
• See the map under "Reception Range" for information about the reception range of
• The DST indicator on the display indicates that Daylight Saving Time (summer time)
is in effect for the selected Home City code. If you are in an area that does not use
Daylight Saving Time (summer time), turn off the DST setting.
starts to flash in place of the city code when you hold down A in
step 1 of the above procedure, press A again to exit the setting screen. After that,
press D and then perform step 1 again.
Operation Guide 3366
If the Power Saving on indicator is flashing on the display,
it means that the Power Saving function has turned off the
display to conserve power. Power Saving automatically
turns off the display and enters a sleep state whenever
the watch is left for a certain period where it is dark.
• The initial factory default setting is Power Saving on.
• The watch will recover from the sleep state if you move it
to a well-lit area,
if you press any button, or if you angle
the watch towards your face for reading.
It can take up to two seconds for the display to turn on .
• See "Power Saving" for more information.
Battery Level Screen
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 in the United States (Fort Collins,
• 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.
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press D to scroll eastwardly through the city codes
until the one you want to use as your Home City is
• The following are the city codes of the major cities in
North America where signal reception is possible.
: Los Angeles, San Francisco, Las Vegas,
Seattle/Tacoma, Vancouver, Tijuana
: Denver, El Paso, Edmonton, Culiacan
: Chicago, Houston, Dallas/Fort Worth,
New Orleans, Winnipeg, Mexico City
: New York, Detroit, Miami, Boston, Montreal
• Note that this watch does not have a city code that
corresponds to Newfoundland.
3. Press A to exit the setting screen.
About This Manual
• Button operations are indicated using the letters shown
in the illustration.
• Most of the display examples in this manual show only
the digital display, without the analog hands.
• 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.
World Time Mode
Hand Setting Mode
To display the digital time and last signal screens
In the Timekeeping Mode, press A or D to change the digital screen contents as
• The last signal screens show the date and time of the last successful time calibration
signal reception. If time calibration signal reception has not been successful since
the battery level dropped to Level 4 or since the battery was replaced,
shown in place of the receive date and receive time in the last signal screens.
Hour : Minutes
Day of week
• The last signal screens continue to cycle on the display for about one or two
minutes. After that, the Timekeeping Mode screen reappears.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive .
• Auto Receive
With auto receive, the watch automatically picks up the time calibration signal four
times a day at midnight, 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more information, see
"About Auto Receive".
• Manual Receive
Manual receive lets you start a time calibration signal reception 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.
• The watch should not be on its side or facing the wrong way.
Last Signal Screens