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Operation Guide 2972 2973

1

MO050

9

-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 and keep it on hand for later reference when necessary.

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 batter y 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 cause 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.

Bright Light

Electrical 
energy

All 
functions
enabled

LEVEL 1

LEVEL 2

LEVEL 3

Charge

Solar cell
(Converts light to 
electrical power.)

Rechargeable battery

LEVEL 1

LEVEL 2

LEVEL 3

Some 
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 quickly run down the battery 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 50 minutes 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.

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.

(Light)

(Light)

Alarm Mode

Countdown Timer  Mode

Stopwatch Mode

General Guide

Press 

C

 to change from mode to mode.

In any mode, press 

L

 to illuminate the display.

Timekeeping Mode

Press 

C

.

World Time  Mode

Radio-controlled Timekeeping

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 from Rugby, England and the signal
from Mainflingen, Germany.

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.

Month – Day

Hour : Minutes Seconds

PM
indicator

The first thing you should do after purchasing this watch is to set your Home City,
which is the city where you will use the watch normally. For more information, see
“To set your Home City” below.

When using the watch outside the ranges of the time signal transmitters, you have to
adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time setting.

To set your Home City

1. In the Timekeeping Mode, hold down 

A

 until the city

code starts to flash, which indicates the setting screen.

2. Use 

D

(east) and 

B

(west) to select the city code you

want to use as your Home City.

The following are the city codes for major cities in the
Western Europe time zones.

3. Press 

A

 to exit the setting screen.

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City code

City

London

Paris

Berlin

Athens

City

Code

LON

PAR

BER

ATH

Other major cities in same time zone

Dublin, Lisbon, Casablanca, Dakar,
Abidjan
Milan, Rome, Madrid, Amsterdam,
Algiers, Hamburg, Frankfurt, Vienna,
Stockholm
Cairo, Jerusalem, Helsinki, Istanbul,
Beirut, Damascus, Cape Town

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.

If you are in an area that does not use Daylight Saving Time (summer time), 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 five or
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”.

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

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.

Signal reception is normally better at night than during the day.

Time calibration signal reception takes from two to six minutes. Take care that you
do not perform any button operations or move the watch during this time.

Inside or
among
buildings

Inside a
vehicle

Near
household
appliances or
office
equipment,
or a mobile
phone

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

Near high-
tension
power lines

Among or
behind
mountains

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