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Operation Guide 3311 5052
Radio-controlled Atomic Timekeeping Precautions
• Strong electrostatic charge can result in the wrong time being set.
• The time calibration signal bounces 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 manually.
• The watch is designed to automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2099. Setting of the date by the 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 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 the 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 ±15 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
TYO
(Tokyo)
DST (summer time)
(Auto switching)
Auto receive
(Auto receive)
Configuring Transmitter Selection Mode Settings
Note that the transmitter selection mode setting can be configured only when
SEL
, or
HKG
is selected as the Home City. See the map for more information.
To configure the transmitter selection mode setting
1. In the Timekeeping Mode, hold down A until the
transmitter indicator starts to flash, which indicates the
setting screen.
• The second hand will move at high speed to the 12
o'clock position, where it will stop.
2. Use D to select the transmitter you want to use.
• Each press of D cycles through the available settings
as described below.
AT
: The watch automatically selects the
Transmitter indicator
frequency that has the strongest signal.
: Receives the signal from Fukushima (40kHz).
: Receives the signal from Fukuoka/Saga
(60kHz).
3. Press A twice to exit the setting screen.
• Reception can take up to 14 minutes when the
• The second hand will advance at high speed to the correct position in accordance
with seconds count of the digital time, and resume normal movement from there.
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 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 or when battery level drops to
Level 4.
• 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.
* UTC 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 all other modes.
• 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 without
any indicator.
Illumination Precautions
• The illumination provided by the light may be hard to see when viewed under direct sunlight.
• Illumination automatically turns off whenever an alarm sounds.
• Frequent use of illumination shortens the battery operating time.
TYO
,
AT
option is selected.
City Code Table
City
GMT
City
Code
Differential
– – –
–11.0
Pago Pago
HNL
Honolulu
–10.0
Papeete
ANC
Anchorage
–09.0
Nome
San Francisco, Las Vegas, Vancouver,
LAX
Los Angeles
–08.0
Seattle/Tacoma, Dawson City, Tijuana
DEN
Denver
–07.0
El Paso, Edmonton, Culiacan
Houston, Dallas/Fort Worth,
CHI
Chicago
–06.0
New Orleans, Mexico City, Winnipeg
Montreal, Detroit, Miami, Boston,
NYC
New York
–05.0
Panama City, Havana, Lima, Bogota
CCS*
Caracas
–04.0
La Paz, Santiago, Port Of Spain
RIO
Rio De Janeiro
–03.0
Sao Paulo, Buenos Aires, Brasilia, Montevideo
– – –
–02.0
– – –
–01.0
Praia
GMT
Dublin, Lisbon, Casablanca, Dakar, Abidjan
+00.0
LON
London
PAR
Paris
Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg,
+01.0
Frankfurt, Vienna, Stockholm
BER
Berlin
ATH
Athens
Helsinki, Istanbul, Beirut, Damascus,
CAI
Cairo
+02.0
Cape Town
JRS
Jerusalem
JED
Jeddah
+03.0
Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow
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, Colombo
DAC
Dhaka
+06.0
RGN
Yangon
+06.5
BKK
Bangkok
+07.0
Jakarta, Phnom Penh, Hanoi, Vientiane
Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,
HKG
Hong Kong
+08.0
Ulaanbaatar
SEL
Seoul
Pyongyang
+09.0
TYO
Tokyo
ADL
Adelaide
+09.5
Darwin
SYD
Sydney
+10.0
Melbourne, Guam, Rabaul
NOU
Noumea
+11.0
Port Vila
WLG
Wellington
+12.0
Christchurch, Nadi, Nauru Island
• Based on data as of March 2008.
• The rules governing global times (GMT differential and UTC offset) and summer time
are determined by each individual country.
* In December 2007, Venezuela changed its offset from –4.0 to –4.5. Note however, that
this watch displays an offset of –4.0 (the old offset) for the CCS (Caracas, Venezuela)
city code.
Other major cities in same time zone
6
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