Casio 2556 Watch User Manual


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USER’S GUIDE 2556
4
General Precautions
• 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.
• 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.
• Reception is best when the antenna built into the 12 o'clock edge of the watch is
facing in the general direction of the signal transmitter. Note, however, that moving
the watch while the time calibration signal receive operation is taking place will make
stable reception impossible.
• Think of the watch as acting like a TV or radio when it is receiving the calibration
signal. When receiving indoors, move to a location as near as possible to a window.
• Proper signal reception can be difficult or even impossible under the conditions
listed below.
Near TVs, refrigerators, computers, or other household appliances
Far away from broadcasting stations among ferro-concrete structures or near
mountains
Underground, in tunnels or in ferro-concrete buildings
Near high-tension wires, neon signs, or radio stations with interfering frequencies
Near railroads, highways or airports
In trains or cars
• Radio interference can make signal reception impossible.
• Strong electrostatic charge can result in the wrong time being set.
Troubleshooting
Check the following points whenever you experience problems with your watch.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the receive
indicator does
not appear on
the display.
Probable Cause
•
The watch is not in the Timekeeping Mode.
• You do not select one of the following
City Codes as your Home City Code:
NYC, CHI, DEN, or LAX.
• You changed the time setting manually.
• The watch was not in the Timekeeping
or World Time Mode, or you were
performing some button operation
during the auto signal receive operation
was performed.
•
Even if receive is successful, the receive
indicator disappears every day at 3am.
• Time data (hour, minutes, seconds) only
was received during the last receive
operation. The receive indicator appears
only when time data and date data
(year, month, day) are both received.
What you should do
• Enter the Timekeeping Mode
and try again.
• Select the correct Home City
Code.
• 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.
•
Put the watch in a location
that is suitable for good
reception.
Time setting is
incorrect
following signal
reception.
• 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.
• Change the DST setting to
Auto DST.
• Select the correct Home City
Code.
Auto Summer Time (DST) Switching
The time calibration signal transmitted from Fort Collins, Colorado includes both
standard time and summer time (Daylight Saving Time) data. When auto summer time
(DST) switching is turned on, the watch switches between standard time and summer
time (DST) automatically in accordance with the Fort Collins signal.
• Daylight Saving Time (DST) advances the time setting by one hour from Standard
Time. Remember that not all countries or even local areas use Daylight Saving Time.
• When using the watch in the Continental United States, select Auto DST for the auto
summer time setting.
• The default auto summer time settings is Auto DST whenever you select one of the
following city codes as your Home City code: NYC, CHI, DEN, LAX, ANC, or HNL.
• If you experience problems receiving the time calibration signal in your area, it is
probably best to turn off auto time switching.
To select the auto summer time setting
1. In the Timekeeping Mode, hold down A until the current auto receive on/off setting
to flash, which indicates the setting screen.
2. Press C three times until the summer time (DST) setting screen appears.
3. Use D to cycle through the summer time settings in the sequence shown below.
4. When the setting you want is selected, press A to exit the setting screen.
Auto DST( ) DST off( ) DST on( )
Timekeeping
• 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 automatically 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 the 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 accurate 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 all other modes (except for the World Time Mode and Time Recorder
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 the 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, with 24
indicator.
• The Word Time Mode and Time Recorder Mode always display times using 24-hour
format, regardless of the 12-hour/24-hour format setting in the Timekeeping Mode.
• In all modes besides the Timekeeping Mode, the current Home City time in the
upper left corner of the display is always displayed using 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 B to 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
PA RIS
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
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
+00
+01
PAGO PAGO
PAPEETE
NOME
SAN FRANCISCO, LAS VEGAS, VANCOUVER,
SEATTLE, DAWSON CITY
EL PASO, EDMONTON
HOUSTON, DALLAS/FORT WORTH,
NEW ORLEANS, MEXICO CITY, WINNIPEG
MONTREAL, DETROIT, MIAMI, BOSTON,
PANAMA CITY, HAVANA, LIMA, BOGOTA
LA PAZ, SANTIAGO, PORT 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
TOKYO
SEOUL
ADELAIDE
SYDNEY
NOUMEA
WELLINGTON
+02
+03
+3.5
+04
+4.5
+05
+5.5
+06
+6.5
+07
+08
+09
+9.5
+10
+11
+12
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
PORT VILA
CHRISTCHURCH, NADI, NAURU ISLAND
AT H
CAI
JRS
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
TYO
SEL
ADL
SYD
NOU
WLG
• Based on data as of December 2001.
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