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Operation Guide 3159

1

MO1005-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.

Keep the watch exposed to bright light

The electricity generated by the solar cell of the watch is
stored by a rechargeable 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 covered only partially.

ll

l

l

l

l

l

l

l

l

l

Bright Light

Solar cell

All 
functions
enabled

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Charge

Rechargeable battery

Bright Light

Electrical 
energy

Solar cell
(Converts light to 
electrical power.)

Battery charges in the light.

Battery discharges in the dark.

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.

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Some or all
functions
disabled

Dis-

charge

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 about 8 hours 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.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage
or loss suffered by you or any third party arising through the use of this product or
its malfunction.

About This Manual

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 

C

 to change from mode to mode.

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

B

 to illuminate

the display.

Timekeeping Mode

Press 

C

.

Countdown Timer  Mode

Stopwatch  Mode

Alarm Mode

World Time  Mode

Radio-controlled Atomic Timekeeping

This watch receives a time calibration signal and updates its time setting accordingly.

This watch is designed to pick up the time calibration signals transmitted in Germany
(Mainflingen), England (Anthorn), the United States (Fort Collins), China (Shangqiu),
and Japan (Fukushima, Fukuoka/Saga).

Current Time Setting

This watch adjusts its time setting automatically in accordance with a time calibration
signal. You also can perform a manual procedure to set the time and date, when
necessary.

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”.

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.

As of December 2009, China does not use Daylight Saving Time (DST). If China
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.

Using this watch in a country covered by a time calibration that is different from the
countries it supports may result in incorrect time indication due to local application of
summer time, etc.

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.

LIS

,

 LON

: Lisbon, London

MAD

PAR

ROM

BER

STO 

: Madrid, Paris,

Rome, Berlin, Stockholm

ATH

: Athens

MOW

: Moscow

HKG

BJS

TPE

 : Hong Kong, Beijing, Taipei

SEL

TYO

: Seoul, Tokyo

HNL

: Honolulu

ANC

: Anchorage

YVR

LAX

: Vancouver, Los Angeles

YEA

DEN

: Edmonton, Denver

MEX

CHI

: Mexico City, Chicago

MIA

YTO

NYC

: Miami, Toronto, New York

YHZ

: Halifax

YYT

: St.Johns

PM indicator

l l l ll

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l l l

City code

Hour : Minutes

Seconds

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 also can 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
“Important!” under “Time Calibration Signal Reception” and “Transmitters”.

See the maps under “Approximate Reception Ranges” for information about the
reception ranges of the watch.

You can disable time signal reception, if you want. See “To turn auto receive on and
off” for more information.

Under factory default settings, auto receive is turned off for all of the following city
codes: 

MOW

 (Moscow), 

HNL

 (Honolulu), and 

ANC

 (Anchorage). For details about

turning on auto receive for these city codes, see “To turn auto receive on and off”.

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 (five times a day for the Chinese calibration signal). 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”.

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 pointing towards a window.
This watch is designed to receive a time calibration signal late at night. Because of
this, you should place the watch near a window as shown in the illustration when you
take it off at night. Make sure there are no metal objects nearby.

12 o’clock

or

Make sure the watch is facing the right way.

Summary of Contents for 3159

Page 1: ...he time and date when necessary 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 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 informati...

Page 2: ...ceive Start Times 1 2 3 4 5 6 Next day HKG BJS TPE SEL TYO HNL ANC YVR LAX YEA DEN MEX CHI MIA YTO NYC YHZ YYT Standard Time and Daylight Saving Time Standard Time Standard Time and Daylight Saving Time 1 00 am Midnight Midnight 2 00 am 1 00 am 1 00 am 3 00 am 2 00 am 2 00 am 4 00 am 3 00 am 3 00 am 5 00 am 4 00 am 4 00 am 5 00 am 5 00 am Note When a calibration time is reached the watch will rece...

Page 3: ... Hold down A to toggle between Daylight Saving Time DST indicator displayed and Standard Time DST indicator not displayed The DST indicator is shown on the World Time Mode screen while Daylight Saving Time is turned on Note that the Standard Time Daylight Saving Time setting affects only the currently displayed city code Other city codes are not affected Note that you cannot switch between Standar...

Page 4: ... should try to keep the watch outside of your sleeve as much as possible Charging is reduced significantly if the face is covered only partially Solar cell Important Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is blocked from exposure to light can cause rechargeable battery power to run down Be sure that the watch is exposed to bright l...

Page 5: ...reas use Daylight Saving Time The time calibration signals transmitted from Mainflingen Germany Anthorn England or Fort Collins the United States include both Standard Time and DST data When the Auto DST setting is turned on the watch switches between Standard Time and DST summer time automatically in accordance with the signals Though the time calibration signals transmitted by the Fukushima and ...

Page 6: ...nel that provides illumination loses power after very long use Illumination may be difficult to see when viewed under direct sunlight The watch may emit an audible sound whenever the display is illuminated This is due to vibration of the EL panel used for illumination and does not indicate malfunction Illumination turns off automatically whenever an alarm sounds Frequent use of illumination runs d...

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