Casio 2555 Operation Manual Download Page 1

Operation Guide 2555 2868

1

MO031

1

-EA

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 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, press 

B

 to illuminate the display.

Date Alert Mode

Stopwatch Mode

Timekeeping Mode

Alarm Mode

Press 

C

.

World Time  Mode

Time Recorder 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.

In the Timekeeping Mode, press 

D

 to display the Last Signal screen. The Last

Signal screen shows the date and time of the last successful time cailbration signal
reception.

Last Signal Screen

Press 

D

.

Day of week

Receive date

Receive time

Month – Day

Hour : Minutes Seconds

PM
indicator

Alternate at the
2-second interval

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 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 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.

To set your Home City

1. In the Timekeeping Mode, hold down 

A

 until the

transmitter indicator (

A/T

MSF

, or 

DCF

) starts to

flash, which indicates the setting screen.

If the displayed transmitter indicator shows something
other than 

A/T

, use 

D

 to display 

A/T

 before

advancing to the next step.

2. Press 

C

 to display the city code setting screen.

3. 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.

LON

: London

PAR

 and 

BER

: Paris, Berlin, Milan, Rome,

Amsterdam, Hamburg, Frankfurt, Vienna,
Barcelona, Madrid

4. Press 

A

 to exit the setting screen.

City code

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.

See “Transmitters” for details about the transmitter indicator.

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 0:00 a.m., 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 receive operation with the press of a
button. For more information, see “To perform manual receive”.

Important!

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 five minutes, but in some cases it
can take as long as 14 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

This watch is designed to receive the time calibration signal transmitted from Rugby,
England and the signal from Mainflingen, Germany.  Signal reception is possible
within the area represented by a circle with a radius of about 1,500 kilometers.

At distances further than about 500 kilometers from a transmitter, signal reception
may not be possible during certain times of year or times of day. Radio interference
may also cause problems with reception.

Rugby

Mainflingen

1,500 kilometers

500 kilometers

See the information under “Signal Receive Troubleshooting” if you experience
problems with time calibration signal reception.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00
a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will
also perform an additional auto receive operation at 5:00 a.m. if none of regularly
scheduled auto receive operations are successful.

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