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Operation Guide 3155

1

MO080

7

-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 built-in 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 only partially covered.

ll

l

l

l

l

l

l

l

l

l

Bright Light

Solar cell

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.

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.)

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Some or all 
functions 
disabled

Dis-

charge

Battery charges in the light.

Battery discharges in the dark.

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 

L

 to illuminate

the display.

Timekeeping Mode

Press 

C

.

Countdown Timer

Mode

Stopwatch Mode

Alarm Mode

Rally Mode

Recall 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” below.

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.

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

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City code

Hour : Minutes

PM indicator

Seconds

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

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 “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 6
times a day (5 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 facing 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.

Proper signal reception can be difficult or even impossible under the conditions listed
below.

Inside or
among
buildings

Inside a
vehicle

Near a
construction
site, airport, or
other sources of
electrical noise

Near high-
tension
power lines

Among or
behind
mountains

Near household
appliances, office
equipment,
or a mobile
phone

Summary of Contents for 3155

Page 1: ...al 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 below When using the watch outside the areas covered by the time signal transmitters you will have to adjust the current time settin...

Page 2: ...ht 1 00 am 2 00 am 3 00 am 4 00 am 5 00 am and Daylight Saving Time Next day HNL ANC LAX DEN CHI NYC YVR YEA MEX MIA YTO YHZ YYT Note When a calibration time is reached the watch will receive the calibration signal only if it is in either the Timekeeping Mode or World Time Mode Reception is not performed if a calibration time is reached while you are configuring settings Auto receive of the calibr...

Page 3: ...he value you want You can use the B button to select the target time you want while the current target time is reset to its initial value LT 01 0 10 LT 07 1 30 LT 02 0 20 LT 08 2 00 LT 03 0 30 LT 09 3 00 LT 04 0 40 LT 10 5 00 LT 05 0 50 OFF LT 06 1 00 LT 05 LT 05 target time 0 50 To change a target time 1 While the current target time is reset to its initial value in the Rally Mode hold down A unt...

Page 4: ...imekeeping Mode is correct Select a city code in the World Time Mode to display the current time in any particular time zone around the globe See the UTC Differential City Code List for information about the UTC differential settings that are supported City code Current time in selected city All of the operations in this section are performed in the World Time Mode which you enter by pressing C To...

Page 5: ...Use D and B to change the setting Setting Hours Minutes Screen To use the countdown timer Press D while in the Countdown Timer Mode to start the countdown timer The countdown timer operation continues even if you exit the Countdown Timer Mode Press D while a countdown operation is in progress to pause it Press D again to resume the countdown To stop a countdown operation completely first pause it ...

Page 6: ...e After a full charge timekeeping remains enabled for up to about seven months The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations Since these are the specs we can include all the technical details Watch not exposed to light Internal timekeeping Display on 18 hours per day sleep state 6 hours per...

Page 7: ...ignal bounces off the ionosphere Because of this such factors as changes in the reflectivity of the ionosphere as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible Even if the time calibration signal is received properly certain conditions can cause the...

Page 8: ... a problem with the watch Pago Pago Honolulu Anchorage Vancouver Los Angeles Edmonton Denver Mexico City Chicago Miami Toronto New York 11 0 10 0 09 0 08 0 07 0 06 0 05 0 PPG HNL ANC YVR LAX YEA DEN MEX CHI MIA YTO NYC UTC Differential City Code List City City UTC Code Differential SCL YHZ YYT RIO RAI UTC LIS LON MAD PAR ROM BER STO Santiago Halifax St Johns Rio De Janeiro Praia Lisbon London Madr...

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