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Operation Guide 3140

1

MA08

10

-EA

 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. 

  • 

 This watch does not have a time zone that corresponds to the UTC offset of 

3.5 hours. Because of this, the radio-controlled timekeeping and World Time 

functions will not display the correct time for Newfoundland, Canada. 

 Caution! 

 Your watch is shipped with its 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. 

 General Guide 

  • 

 Press  

 to change from mode to mode. 

  • 

 In any mode (except when a setting screen is on the display), press  

 to illuminate 

the display. 

Timekeeping Mode

World Time Mode

Countdown
Timer Mode

Alarm Mode

Stopwatch Mode

Press

.

 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 (Anthorn). 

  • 

 See the information under “Signal Reception 

Troubleshooting” if you experience problems with time 
calibration signal reception. 

 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, 
when necessary. 

  •  

 The fi rst 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” .

 

  • 

 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  

 until the city 

code starts to fl ash, which indicates the setting screen. 

 2. Press  

(east) and  

(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. Signal

U.K. Signal

City
Code

City
Name

City
Code

City
Name

City
Code

City
Name

City
Code

City
Name

HNL

Honolulu

YWG

Winnipeg

LIS

Lisbon

ATH

Athens

ANC

Anchorage

CHI

Chicago

LON

London

MOW

Moscow

YVR

Vancouver

MIA

Miami

MAD

Madrid

LAX

Los Angeles

YTO

Toronto

PAR

Paris

YEA

Edmonton

NYC

New York

ROM

Rome

DEN

Denver

YHZ

Halifax

BER

Berlin

MEX

Mexico City

YYT

St. Johns

STO

Stockholm

 

 3. Press  

 twice to exit the setting screen. 

Day of week

Year

Home Time
(Hour : Minutes Seconds)

Month – Day

PM indicator

DST
indicator

 Important! 

  • 

 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 “Approximate 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. 

  • 

 Auto 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 

 Manual receive lets you start a time calibration receive operation with the press of a 
button. For more information, see “To perform manual receive”. 

City code

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