Casio 2555 User manual

Operation Guide 2555 2868
1
MO0311-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 Cto change from mode to mode.
•In any mode, press Bto 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 Dto 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 Auntil 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 Dto display A/T before
advancing to the next step.
2. Press Cto 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 Ato 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.

Operation Guide 2555 2868
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Note
•The auto receive operation is performed only if the watch is in the Timekeeping
Mode or World Time Mode when one of the calibration times is reached. It is not
performed if a calibration time is reached while an alarm is sounding, or while you
are configuring settings (while settings are flashing on the display).
•Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can easily receive the signal.
•When auto receive is turned on, the watch receives the calibration signal for two to
five minutes everyday when the time in the Timekeeping Mode reaches each of the
calibration times. Do not perform any button operation within five minutes before or
after any one of the calibration times. Doing so can interfere with correct calibration.
•Remember that reception of the calibration signal depends on the time kept in the
digital display. The receive operation will be performed whenever the display shows
any one of the calibration times, regardless of whether or not the displayed time is
actually the correct time.
•When two, three, four, or five receptions are successful, the watch uses the data of
the last reception for calibration. When only one reception is successful, the watch
uses the data of the successful reception.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Receiving indicator
•Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
•Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
•The Level 4 receiving indicator remains on the display in all modes following
reception of the time calibration signal and calibration of the watch’s time setting.
The Level 4 receiving indicator is not displayed if signal reception was unsuccessful
or after manual adjustment of the current time setting.
Weak Strong
(Level 1) (Level 4)
•The Level 4 receiving indicator is displayed only when the watch is able to
successfully receive both time and date data. It does not appear when only time data
is received.
•The Level 4 receiving indicator indicates that at least one of the calibration signal
receive operations was successful. Note, however, that the Level 4 receiving
indicator is cleared from the display at 3:00 a.m. each day.
To perform manual receive
1. Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
•Note that signal reception is poor when the 12 o’clock
side of the watch is not facing towards a window.
2. In the Timekeeping Mode, hold down Dfor about two
seconds until the watch beeps.
3. Release Dand the message RC! appears to indicate
that signal reception has started.
•Time calibration signal reception takes from two to five
minutes. Take care that you do not perform any button
operations or move the watch during this time.
Receiving indicator
•After signal reception is complete, the display of the watch changes to the Last
Signal screen.
Note
•To interrupt a receive operation and return to the Timekeeping Mode, press D.
•If the receive operation is unsuccessful, the message ERR appears on the display
for about one or two minutes. After that, the watch returns to the Timekeeping Mode.
•You can also change from the Last Signal or ERR screen to the normal
timekeeping screen by pressing D.
To turn auto receive on and off
1. In the Timekeeping Mode, hold down Auntil the
transmitter indicator starts to flash, which indicates the
setting screen.
2. Press Cthree times to move the flashing to the auto
receive on/off setting.
3. Press Dto toggle auto receive on (ON) and off (OF).
•If the current Home City setting is a city code that
does not support signal receive, “xx”appears in
place of the on/off indicator. This means you cannot
turn auto receive on or off.
4. Press Ato exit the setting screen.
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On/off status
•For further information, see “Important!”under “Time Calibration Signal Reception”
and “Radio-controlled Timekeeping Precautions”.
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
Probable Cause
• The watch is not in the Timekeeping Mode.
•Your current Home City is not one of the
following city codes:
BER, PAR, or LON.
•The transmitter setting is incorrect.
•The transmitter setting is incorrect.
•You changed the time setting manually.
•The watch was not in the Timekeeping
or World Time Mode, or you performed
some button operation during the auto
receive operation.
• Even if receive is successful, the Level 4
receiving indicator disappears every day
at 3 am.
•Time data (hour, minutes, seconds) only
was received during the last receive
operation. The Level 4 receiving
indicator appears only when time data
and date data (year, month, day) are
both received.
•If the time is one hour off, the DST
setting may be incorrect.
•The Home City code setting is not
correct for the area where you are using
the watch.
What you should do
•Enter the Timekeeping Mode
and try again.
•Select BER, PAR, or LON
as your Home City.
•Select the transmitter setting
appropriate for your current
location.
•Select the transmitter setting
appropriate for your current
location.
•Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
•Check to make sure the watch
is in a location where it can
receive the signal.
•Change the DST setting to
Auto DST.
•Select the correct Home City
code.
World Time
The World Time shows the current time in 30 cities (29
time zones) around the world.
•If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City settings and
make the necessary changes.
•The watch will perform a signal receive operation even if
it is in the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
•All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
Current time in the
selected city code
(Hour : Minutes Seconds)
City code
Home city time
DST indicator
To view the time in another city code
In the World Time Mode, press Dto scroll through city codes (time zones) to the east
or Ato scroll to the west.
•For full information on city codes, see the “City Code Table”.
•The World Time Mode times are always displayed using 24-hour format.
•You can change the DST (Daylight Saving Time)/Standard Time settings for each
city code in the Timekeeping Mode. See “Daylight Saving Time (DST)”for more
information.
Alarms
The Alarm Mode gives you a choice of four one-time
alarms and one snooze alarm. One of the one-time
alarms functions as a “target alarm”, which counts the
time remaining from the current Timekeeping Mode time
(Home City time) to the target alarm time.
Also use the Alarm Mode to turn the Hourly Time Signal
(SIG) on and off.
•There are five alarms numbered AL1 through AL3,
TAL,and SNZ. You can configure SNZ as a
snooze alarm only. Alarms AL1 through TAL
(target alarm) can be used as one-time alarms only.
•Alarm settings (and Hourly Time Signal settings) are
available in the Alarm Mode, which you enter by
pressing C.
Alarm time (Hour : Minutes)
Home city time
Alarm number
Countdown
(Hours : Minutes Seconds)
Target Alarm Screen
To set an alarm time
1. In the Alarm Mode, use Dto scroll through the alarm
screens until the one whose time you want to set is
displayed.
2. After you select an alarm, hold down Auntil the hour
setting of the alarm time starts to flash, which indicates
the setting screen.
•This operation automatically turns on the alarm.
3. Use Cto move the flashing in the sequence shown
below to select other settings.
MinutesHour On/Off
AL1 AL2 AL3
SIG SNZ TAL
Alarm on indicator
Snooze indicator
4. While a setting is flashing, use Dand Bto change it.
•While the hour or minute setting is flashing, use D(+) and B(–) to change it.
•While the on/off setting is flashing, use Dto toggle it on (ON) and off (OF).
5. Press Ato exit the setting screen.
•When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (Pindicator).
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, or until you turn the alarm off.
•Pressing any button stops the alarm tone operation.
•If any alarm operation (one-time alarm, snooze) occurs while a signal receive
operation is in progress, the receive operation is canceled.
•Displaying the Timekeeping Mode setting screen during a 5-minute interval between
snooze alarms stops the current snooze alarm operation (but snooze alarm remains
as the alarm type setting).
•The snooze indicator ( ) flashes during the 5-minute intervals between alarms.
•The alarm on indicator ( ) and snooze indicator ( ) are displayed in all modes.
•In all modes, the alarm on indicator is shown for any alarm that is currently turned
on.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.

Operation Guide 2555 2868
3
To turn an alarm on and off
1. In the Alarm Mode, use Dto scroll through the alarm
screens until the one whose time you want to set is
displayed.
2. After you select an alarm, hold down Auntil the hour
setting of the alarm time starts to flash, which indicates
the setting screen.
•This operation automatically turns on the alarm.
3. Press Ctwice to move the flashing to the alarm’s on/
off setting.
4. While the on/off setting is flashing, press Dto toggle it
on (ON) and off (OF).
5. Press Ato exit the setting screen.
On/off status
Press C
twice.
▲
Alarm on
indicator
To turn the Hourly Time Signal on and off
1. In the Alarm Mode, use Dto scroll through the alarm
screens until the Hourly Time Signal screen (SIG) is
displayed.
2. Hold down Auntil the Hourly Time Signal on/off setting
starts to flash, which indicates the setting screen.
•This operation automatically turns on the Hourly Time
Signal.
3. While the on/off setting is flashing, press Dto toggle it
on (ON) and off (OF).
4. Press Ato exit the setting screen.
•The Hourly Time Signal on indicator is displayed in all
modes when the Hourly Time Signal is turned on.
Hourly time signal
on indicator
On/off status
Date Alert
Date Alert helps you to remember an important date. After you set an alert date
(month and day), a date alert indicator (!) and the current date flash for 24 hours after
the alert date arrives in the Timekeeping Mode.You can set up to five different date
alerts.
Timekeeping Mode Screen
Alert number Current date (Month –Day)
Date alert indicator
Home city time
Alert date
(Month –Day)
Date Alert Mode Screen
•To stop the flashing of the date alert indicator and date, use the procedure below to
turn off the alert for that date.
To set the alert date
1. Use Cto enter the Date Alert Mode.
2. Use Dto scroll through the alert screens until the one
whose date you want to set is displayed.
3. After you select an alert, hold down Auntil the month
setting of the alert date starts to flash, which indicates
the setting screen.
•This operation automatically turns on the alert.
DA1 DA2 DA3
DA5 DA4
On/off status
4. Press Cto move the flashing in the sequence shown below.
5. While a setting is flashing, use Dand Bto change it.
•While the month or day setting is flashing, use D(+) and B(–) to change it.
•While the on/off setting is flashing, press Dto toggle it on (ON) and off (OF).
6. Press Ato exit the setting screen.
DayMonth
Alert date
On/Off
Time Recorder
The Time Recorder Mode lets you store up to 50 time
entries (hour, minutes, seconds) with the touch of a
button. One way you can use the Time Recorder Mode is
to record the start time and the end time of a particular
event.
•All of the operations in this section are performed in the
Time Recorder Mode, which you enter by pressing C.
To record a Time Recorder time
1. Use Cto enter the Time Recorder Mode.
•This displays the Time Recorder standby screen.
2. Press Dto record the Home City time (hour, minutes,
seconds).
Standby Screen
Home city time
Home city time seconds
•The recorded time flashes for about two seconds and then assigned the next
available record number, in the range of T1 through T50. Next the time recorder
standby screen appears.
•A new time is recorded each time you press Dwhile the standby screen is on the
display.
•The Time Recorder Mode always displays times using 24-hour format, regardless of
the 12-hour/24-hour format setting in the Timekeeping Mode.
To recall Time Recorder times
In the Time Recorder Mode, press Ato scroll through
times stored in memory.
•Each press of Ascrolls through time records from
higher numbered (newer) records to lower numbered
records.
•Whenever you enter the Time Recorder Mode, the
standby screen appears first.
•Press Dto return to the standby screen.
Time record number
Recorded time
(Hour : Minutes Seconds)
To delete all Time Recorder times
Enter the Time Recorder Mode. While holding down A,
press Dto delete all Time Recorder times.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
•The display range of the stopwatch is 23 hours, 59
minutes, 59.99 seconds.
•The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
•Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
•The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
•All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
1/100 second
Hours
Home city time
Seconds
Minutes
D
Start Stop
Elapsed Time
➤
Re-start Clear
D➤
Stop
D➤D➤A
Split Time
D
Start Split
➤
Split release Clear
A➤
Stop
A➤D➤A
Two Finishes
D
Start Split
➤
Stop Clear
A➤
Split release
D➤A➤A
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
(and flash)
To measure times with the stopwatch
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. This section
also explains how to manually set the current date and time.
•All of the operations in this section are performed in the Timekeeping Mode, which
you enter by pressing C.
•In the Timekeeping Mode, press Dto display the Last Signal screen.
▲
Press D.
Month –Day Hour : Minutes Seconds
PM
indicator
▲
Last Signal Screen
Day of week
Setting the Time and Date Manually
Make sure you select your Home City code before you change the current time and
date settings. World Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, World Time Mode times will not be
correct if you do not select the proper Home City code before setting the time and
date in the Timekeeping Mode.
•When setting the time and date, you can also configure settings for the transmitter,
your Home City code (the code for the city where you normally use the watch),
summer time (Daylight Saving time or DST), auto receive, and the 12/24-hour
format.
To set the time and date manually
1. In the Timekeeping Mode, hold down Auntil the
transmitter indicator start to flash, which indicates the
setting screen.
2. Press Conce to move the flashing to the city code
setting (see the illustration below), and then use Band
Dto display the city code you want to use as your
Home City code.
•Make sure you select your Home City code before
changing any other setting.
•For full information on city codes, see the “City Code
Tab le”.
3. Press Cto move the flashing in the sequence shown below to select other settings.
Auto
Receive
DSTCity Code
Seconds
HourMinutes
12/24-Hour
Format
Day Month Year
Transmitter
•Records are assigned numbers sequentially from T1 through T50.
•Storing a new time record when there are already 50 records stored in memory
automatically deletes record T1, shifts the remaining records upwards by 1, and
stores the new record as T50.

Operation Guide 2555 2868
4
4. When the setting you want to change is flashing, use Band Dto change it as
described below.
To do this:
Change the transmitter setting (A/T, MSF,
or DCF)
Change the city code
Toggle between Daylight Saving Time (ON),
Standard Time (OF), or Auto DST (A)
Toggle between auto receive on (ON) and
off (OF)
Toggle between 12-hour (12H) and 24-
hour (24H) timekeeping
Reset the seconds to 00
Change the hour, minutes, year, month, day
Screen To do this:
Press D.
Use D (east) and B (west).
Press D.
Press D.
Press D.
Use D(+) and B(–).
A/T
LON
10:58
A
DST
ON
R/C
10:58 50
12H
10:58 50
'04
6-30
Press D.
5. Press Ato exit the setting screen.
Note
•The transmitter setting specifies which transmitter’s signal should be used for time
calibration. See “Transmitters”for more information.
•Auto DST (A) can be selected only while BER, PAR, LON, or ATH is selected as the
Home City code. For more information, see “Daylight Saving Time (DST)”below.
•The auto receive setting is used for time calibration signal reception only. See “About
Auto Receive”for details.
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
The time calibration signals transmitted from Rugby and Mainflingen 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 received time signal.
Note
•Auto DST (A) can be selected only while BER, PAR, LON, or ATH is selected
for the city code setting.
•If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight Saving Time (summer
time) manually.
•The DST indicator appears when DST (summer time) is being applied for the
currently displayed time.
•Note that summer time is not supported for the GMTcity code.
•See “To change the DST setting for the Home City code”and “To change the DST
setting for a World Time Mode city code”for more information.
To change the DST setting for the Home City code
1. In the Timekeeping Mode, hold down Auntil
transmitter indicator starts to flash, which indicates the
setting screen.
2. Press Ctwice to display the DST setting screen.
3. Use Dto cycle through the DST settings in the
sequence shown below.
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Auto DST ( A ) DST off ( OF ) DST on ( ON )
4. When the setting you want is selected, press Ato exit
the setting screen.
To change the DST setting for a World Time Mode city code
1. In the Timekeeping Mode, hold down Auntil
transmitter indicator starts to flash, which indicates the
setting screen.
2. Press Cto display the city code setting screen.
3. Use Band Dto display the city code whose DST
setting you want to change.
4. Press Cto display the DST setting screen.
5. Press Dto toggle the DST setting between ON (DST
on) and OF (DST off).
•If you select BER, PAR, LON, or ATH as the city
code in step 3, pressing Dwill cycle through three
settings: A(Auto DST), ON (DST on) and OF (DST
off). For this World Time Mode setting procedure,
select either OF (DST off) or ON (DST on).
6. When the setting you want is selected, press Cnine times to display the city code
setting screen.
7. Use Band Dto return the city code setting to your Home City code.
8. Press Ato exit the setting screen.
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Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Features
•If you leave the watch in the Alarm (except for the target alarm screen) or Date
Alert Mode for two or three minutes without performing any operation, it
automatically changes to the Timekeeping Mode.
•If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
Scrolling
The A, B, and Dbuttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Initial Screens
When you enter the World Time, Alarm, or Date Alert Mode, the data you were
viewing when you last exited the mode appears first.
Radio-controlled Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time being set.
•Even when the watch is within the reception range of the transmitter, signal
reception is impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
•Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
•The time calibration signal is bounced 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 time setting to be off by up to one second.
•The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
•The watch is designed to automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2039. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2040.
•This watch can receive signals that differentiate between leap years and non-leap
years.
•Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.
•Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows date as kept in the Timekeeping Mode at the
time of signal reception.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.
•If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your transmitter, current city code, DST
(summer time), and auto receive settings. The following are the initial factory defaults
for these settings.
Setting
Transmitter
City code
DST
(summer time)
Auto receive
Initial Factory Default
60 MSF (Rugby) (Module 2555) 77 DCF (Mainflingen) (Module 2868)
LON (London) (Module 2555) BER (Berlin) (Module 2868)
A DST (Auto switching)
ON R/C (Auto receive)
•To find out the module number of your watch, look at its
back cover. The Module number (2555 or 2868) will be
engraved inside the box on the back cover.
2555
2868
Transmitters
This watch is designed to receive the time calibration signal transmitted from Rugby,
England and the signal from Mainflingen, Germany. You can select either one of the
transmitters, or you can configure the watch to automatically select the transmitter that
has the strongest signal.
•The following explains how the watch determines which transmitter it should check
first while the watch is configured for auto transmitter search (A/T).
In this case:
The first signal auto search operation
after factory default settings are in effect,
or after the city code has been changed.
Any case other than the above.
The watch does this:
1. Checks the Rugby signal first.
2. If the Rugby signal cannot be received,
checks the Mainflingen signal.
1. Checks the last successfully received
signal first.
2. If the last successfully received signal
cannot be received, checks the other
signal.
Module 2555
In this case:
The first signal auto search operation
after factory default settings are in effect,
or after the city code has been changed.
Any case other than the above.
The watch does this:
1. Checks the Mainflingen signal first.
2. If the Mainflingen signal cannot be
received, checks the Rugby signal.
1. Checks the last successfully received
signal first.
2. If the last successfully received signal
cannot be received, checks the other
signal.
Module 2868
•Since the watch checks signals from both transmitters when A/T is selected as the
transmitter setting, the signal receive operation can take as long as 14 minutes.
To select a transmitter
1. In the Timekeeping Mode, hold down Auntil the
transmitter indicator starts to flash, which indicates the
setting screen.
2. Use Dto scroll through available transmitter settings
until the one you want to select is displayed.
•Note that --- appears in place of the transmitter indicator when any city code
besides LON, PAR, BER, or ATH is selected as the Home City code. This
indicates that you cannot specify a transmitter.
3.Press Ato exit the setting screen.
To set up the watch to do this:
Automatically select the Rugby or Mainflingen signal
Receive the Mainflingen signal
Receive the Rugby signal
Select this transmitter setting:
A/T
DCF
MSF

Operation Guide 2555 2868
5
Timekeeping
•Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
•The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
•The year can be set in the range of 2000 to 2039.
•The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced.
•The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
•GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* The letters “UTC”stands for “Universal Time Coordinated”, which is the world-wide scientific
standard of timekeeping. It is based upon carefully maintained atomic (cesium) clocks that
keep time accurately to within microseconds. Leap seconds are added or subtracted as
necessary to keep UTC in sync with the Earth’s rotation. The reference point for UTC is
Greenwich, England.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in the Alarm Mode.
•With the 12-hour format, the P(PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
•With the 24-hour format, times are displayed in the range of 0:00 to 23:59. The
indicator 24 indicates the 24-hour format.
•In any mode other than the Timekeeping Mode, the current Home City time is
displayed in the upper part of the display in 24-hour format.
Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark.
In any mode, press Bto illuminate the display for about one second.
•The electro-luminescent panel that provides illumination loses power after very long
use.
•The illumination provided by the backlight may be hard 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.
•The backlight automatically turns off whenever an alarm sounds.
•Frequent use of the backlight shortens the battery life.
Honolulu
Anchorage
Los Angeles
Denver
Chicago
New York
Caracas
Rio De Janeiro
London
Paris
Berlin
City City GMT Other major cities in same time zone
Code Differential
City Code Table
–––
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–––
–––
GMT
LON
PA R
BER
–11.0
–10.0
–09.0
–08.0
–07.0
–06.0
–05.0
–04.0
–03.0
–02.0
–01.0
+00.0
+01.0
Pago Pago
Papeete
Nome
San Francisco, Las Vegas, Vancouver,
Seattle/Tacoma, Dawson City, Tijuana
El Paso, Edmonton, Culiacan
Houston, Dallas/Ft. Worth,
New Orleans, Mexico City, Winnipeg
Montreal, Detroit, Miami, Boston,
Panama City, Havana, Lima, Bogota
La Paz, Santiago, Pt. Of Spain
Sao Paulo, Buenos Aires, Brasilia, Montevideo
Praia
Dublin, Lisbon, Casablanca, Dakar, Abidjan
Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg,
Frankfurt, Vienna, Stockholm
Athens
Cairo
Jerusalem
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Hong Kong
Seoul
Tokyo
Adelaide
Sydney
Noumea
Wellington
+02.0
+03.0
+03.5
+04.0
+04.5
+05.0
+05.5
+06.0
+06.5
+07.0
+08.0
+09.0
+09.5
+10.0
+11.0
+12.0
Helsinki, Istanbul, Beirut, Damascus,
Cape Town
Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow
Shiraz
Abu Dhabi, Muscat
Male
Mumbai, Kolkata
Colombo
Jakarta, Phnom Penh, Hanoi, Vientiane
Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,
Ulaanbaatar
Pyongyang
Darwin
Melbourne, Guam, Rabaul
Pt. Vila
Christchurch, Nadi, Nauru Is.
ATH
CAI
JRS
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
SEL
TYO
ADL
SYD
NOU
WLG
•Based on data as of June 2003.