Casio 5052 City Code Table, Radio-controlledAtomic Timekeeping Precautions, Timekeeping, Illumination Precautions, GMT, City, City, Setting, ll l l l

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 TYO, SEL, or HKG is selected as the Home City. See the map for more information.

To configure the transmitter selection mode setting

City Code Table

City	City	GMT	Other major cities in same time zone
Code		Differential
– – –		–11.0	Pago Pago
HNL	Honolulu	–10.0	Papeete
ANC	Anchorage	–09.0	Nome
LAX	Los Angeles	–08.0	San Francisco, Las Vegas, Vancouver,
			Seattle/Tacoma, Dawson City, Tijuana
DEN	Denver	–07.0	El Paso, Edmonton, Culiacan
CHI	Chicago	–06.0	Houston, Dallas/Fort Worth,
			New Orleans, Mexico City, Winnipeg
NYC	New York	–05.0	Montreal, Detroit, Miami, Boston,
			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		+00.0	Dublin, Lisbon, Casablanca, Dakar, Abidjan
LON	London
PAR	Paris	+01.0	Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg,
BER	Berlin		Frankfurt, Vienna, Stockholm
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
HKG	Hong Kong	+08.0	Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,
			Ulaanbaatar
SEL	Seoul	+09.0	Pyongyang
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.

ll l l l
l	l
l	l
l	l

l		l
l	l l l	l

Transmitter indicator

1.In the Timekeeping Mode, hold down Auntil 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 Dcycles through the available settings as described below.

AT : The watch automatically selects the 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 AT option is selected.

•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.

6