Operation Guide 3725 3726
Getting Acquainted
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 when necessary.
Expose the watch to bright light to charge its batteries before using it. You can use this watch even as its batteries are being charged by exposure to bright light.
• Be sure to read “Power Supply” of this manual for important information you need to know when exposing the watch to bright light.
If the digital display of the watch is blank...
If the Power Saving indicator ( | ) is flashing, it means |
Power saving indicator that the display is blank because the watch’s Power | |
Saving function has turned it off to conserve power. Power | |
Saving automatically turns off the display and enters a | |
sleep state whenever your watch is left for a certain period | |
in an area where it is dark. If the watch is kept in the dark for a longer period, the analog hands will also stop moving after a few days.
• The initial factory default setting is Power Saving on.
• The watch will recover from the sleep state if you move it to a
•See “Power Saving Function” for more information.
About This Manual
(Light)
(Light)
•Depending on the model of your watch, display text appears either as dark figures on a light background, or light figures on a dark background. All sample displays in this manual are shown using dark figures on a light background.
•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.
General Guide
• Press Cto change from mode to mode.
• In any mode, press L to illuminate the digital display areas.
| World Time Mode |
Timekeeping Mode |
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Press C. |
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▲ | P |
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Radio-controlled Timekeeping
Hour hand | This watch receives a time calibration signal and updates |
Minute hand 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 Rugby, England and the signal |
| from Mainflingen, Germany. |
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Seconds | Day of week | |||
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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 necessary.
•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 Rugby 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.
Alarm Mode | Countdown Timer Mode |
▲ | ▲ |
Hand Setting Mode | Stopwatch Mode |
▲ | ▲ |
To display the digital time and last signal screen
•In the Timekeeping Mode, press B to cycle through the digital time screens as shown below.
•In the Timekeeping Mode, press D to display the last signal screen in the bottom
dial. The last signal screen shows the date and time of the last successful time | |||
calibration signal reception. |
| Seconds Seconds | Hour: |
| Day | ||
| Minutes | ||
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Press B. | B | B |
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▲ | ▲ | ▲ |
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Day of week | Month. Day | PM indicator |
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▲ | B |
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Press D. |
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Day of
Seconds week
DST indicator | Last Signal | Reception date | Reception time |
| Screen |
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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 five |
times a day at midnight, 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 |
Manual receive lets you start a time calibration signal reception with the press of a |
To set your Home City
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City code
1.In the Timekeeping Mode, hold down A until the city code starts to flash in the bottom dial, which indicates the setting screen.
2.Use D(east) and B(west) to scroll through the city codes until the one you want to use as your Home City is displayed.
•The following are the city codes for major cities in the Western Europe time zones.
LON: London
PAR and BER: Paris, Berlin, Milan, Rome,
Amsterdam, Hamburg, Frankfurt,
Vienna, Barcelona, Madrid
button. For more information, see “To perform manual receive”. |
Important!
•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.
Resin Band Metal Band
3. Press Ato 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 (in the middle of the night). You can also perform manual receive or you can set the time manually.
•If you are in an area that does not use Daylight Saving Time (summer time), turn off the DST setting.
•The watch should not be on its side or facing the wrong way.
•Proper signal reception can be difficult or even impossible under the conditions listed below.
Inside or | Inside a | Near | Near a | Near high- | Among or |
among | vehicle | household | construction | tension | behind |
buildings |
| appliances, | site, airport, or | power lines | mountains |
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| office | other sources |
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| equipment, | of electrical |
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| or a mobile | noise |
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| phone |
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