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Operation Guide 3054
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 Fort Collins (the United States) or Rugby
(England) includes 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.
• The default DST setting is Auto DST (
YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, YYT, LIS, LON, MAD, PAR,
ROM, BER, STO, ATH, or MOW as your Home City code.
• If you experience problems receiving the time calibration signal in your area, it
probably is best to switch between Standard Time and Daylight Saving Time
(summer time) manually.
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down A until the city code starts to flash, which
indicates the setting screen.
2. Press C and the DST setting screen appears.
3. Use D to cycle through the DST settings in the sequence shown below.
Auto DST (
)
DST off (
4. When the setting you want is selected, press A to exit the setting screen.
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
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 Display
Auto Display continually changes the contents of the digital display.
To turn off Auto Display
Press any button to turn off Auto Display. This returns to the Timekeeping Mode.
To turn on Auto Display
In the Timekeeping Mode, while holding down B, hold down D for about two
seconds until the watch beeps.
Note
• Calibration signal reception is disabled while Auto Display is being performed.
• Auto Display cannot be performed while a setting screen is on the display.
Button Operation Tone
The button operation tone sounds any time you press one
of the watch's buttons. You can turn the button operation
tone on or off as desired.
• Even if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
MUTE indicator
display), hold down C to toggle the button operation tone
on (
not displayed) and off (
• Since the C button is also the mode change button, holding it down to turn the
button operation tone on or off also causes the watch's current mode to change.
•
is displayed in all modes when the button operation tone is turned off.
Auto Return Features
• If you leave the watch with the Last Signal screen in the Timekeeping Mode for one
or two minutes without performing any operation, it returns to the Current Time and
Date screen in the Timekeeping Mode automatically.
• If you leave the watch in the Alarm Mode for two or three minutes without performing
any operation, it returns to the Timekeeping Mode automatically.
• If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
B and D are used in various modes and setting screens to scroll through data. 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 or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
Radio-controlled Atomic Timekeeping Precautions
• The display of the watch is blank while an auto receive operation is in progress.
• Strong electrostatic charge can result in the wrong time being set.
• 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 update the date and day of the week automatically for the
period January 1, 2000 to December 31, 2099. Setting of the date by a time
calibration signal cannot be performed starting from January 1, 2100.
• 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 Receive Mode is the date data
included in the received time calibration signal. When only time data is received,
however, the Receive Mode shows the date as kept in the Timekeeping Mode at the
time of signal reception.
) whenever you select ANC, YVR, LAX,
)
DST on (
)
displayed).
• 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 current city code, DST (summer
time), and auto receive settings.
The following are the initial factory defaults for these settings.
Setting
Initial Factory Default
City code
NYC
(New York)
DST (summer time)
(Auto switching)
Auto receive
(Auto receive)
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 displayed automatically in accordance with the date (year,
month, and day) settings.
• The year can be set in the range of 2000 to 2099.
• 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 times for the Timekeeping Mode and all the city codes of the World Time Mode
are calculated in accordance with each city's UTC differential.
• The UTC differential is a value that indicates the time difference between a
reference point in Greenwich, England and the time zone where a city is located.
• The letters "UTC" is the abbreviation 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.
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.
• With the 12-hour format, the PM indicator (P) appears on the display for times in the
range of noon to 11:59 p.m. and AM indicator (A) 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, without
any indicator.
Illumination
This watch has an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In any mode (except when a setting screen is on the
display), press B to illuminate the display for about three seconds.
Illumination Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
• Illumination 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.
• Illumination automatically turns off whenever an alarm sounds.
• Frequent use of illumination runs down the battery.
Day of the Week List
Sunday
Monday Tuesday Wednesday Thursday
ENx
SUN
oON
TUE
ESP
DOo
LUN
oAR
FRA
DIo
LUN
oAR
POR
DOo
SEx
TER
DEU
SON
oON
DIE
ITA
DOo
LUN
oAR
CHN
BT
RUS
CS
QO
JPN
City Code Table
City
UTC
City
Code
Differential
PPG
Pago Pago
–11.0
HNL
Honolulu
–10.0
Papeete
ANC
Anchorage
–09.0
Nome
YVR
Vancouver
San Francisco, Las Vegas,
–08.0
LAX
Los Angeles
Seattle/Tacoma, Dawson City
YEA
Edmonton
–07.0
El Paso
DEN
Denver
MEX
Mexico City
YWG
Winnipeg
–06.0
Houston, Dallas/Fort Worth, New Orleans
CHI
Chicago
MIA
Miami
Montreal, Detroit, Boston,
YTO
Toronto
–05.0
Panama City, Havana, Lima, Bogota
NYC
New York
CCS
Caracas
–04.0
La Paz, Santiago, Port Of Spain
YHZ
Halifax
YYT
St. Johns
–03.5
RIO
Rio De Janeiro
–03.0
Sao Paulo, Buenos Aires, Brasilia, Montevideo
RAI
Praia
–01.0
LIS
Lisbon
+00.0
Dublin, Casablanca, Dakar, Abidjan
LON
London
MAD
Madrid
PAR
Paris
ROM
Rome
+01.0
Milan, Amsterdam, Algiers, Hamburg, Frankfurt, Vienna
BER
Berlin
STO
Stockholm
ATH
Athens
Helsinki, Istanbul, Beirut, Damascus,
CAI
Cairo
+02.0
Cape Town
JRS
Jerusalem
MOW
Moscow
+03.0
Kuwait, Riyadh, Aden, Addis Ababa, Nairobi
JED
Jeddah
THR
Tehran
+03.5
Shiraz
DXB
Dubai
+04.0
Abu Dhabi, Muscat
KBL
Kabul
+04.5
KHI
Karachi
+05.0
Male
DEL
Delhi
+05.5
Mumbai, Kolkata
Friday
Saturday
WED
THU
FRI
SAT
oIb
JUE
VIE
SaB
oER
JEU
VEN
SAo
QUA
QUI
SEX
SaB
oIT
DON
FRE
SAo
oER
xIO
VEN
SAB
SR
YT
QT
SB
Other major cities in same time zone
4
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