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3

Operation Guide 3100

To toggle a city code time between Standard Time and Daylight Saving Time

1. In the World Time Mode, use 

D

 and 

C

 to display the

city code whose Standard Time/Daylight Saving Time
setting you want to change.

2. Hold down 

A

 for about one second to toggle Daylight

Saving Time (

DST

 displayed) and Standard Time (

DST

not displayed).

The 

DST

 indicator appears on the display whenever you

display a city code for which Daylight Saving Time is
turned on.

Note that the DST/Standard Time setting affects only the
currently displayed city code. Other city codes are not
affected.

DST indicator 

Alarm

When the Daily Alarm is turned on, the alarm sounds for
10 seconds at the preset time each day. When the Hourly
Time Signal is turned on, the watch beeps every hour on
the hour.

All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing 

B

.

To set the alarm time

1. Hold down 

A

 while in the Alarm Mode until the hour

digits start to flash on the display. The hour digits flash
because they are selected.

This operation turns on the alarm automatically.

Current time 

Alarm on indicator 

Hourly time signal 
on indicator 

Alarm time 
(Hour : Minutes) 

2. Press 

B

 to change the selection in the following sequence.

Hour

Minutes

3. While a setting is flashing, use 

D

 and 

C

 to change it as described below.

4. After you set the alarm time, press 

A

 to return to the Alarm Mode.

To stop the alarm

Press any button to stop the alarm after it starts to sound.

To switch the Daily Alarm and Hourly Time Signal on and off

Press 

D

 while in the Alarm Mode to change the status of the Daily Alarm and Hourly

Time Signal in the following sequence.

Hourly Time
Signal only

Daily Alarm
only

Both off

Both on

To test the alarm

Hold down 

D

 while in the Alarm Mode to sound the alarm.

Screen

12:00

To do this:

Change the hour and minutes

Do this:

Use 

D

 (+) and 

C

 (–).

With the 12-hour format, set the time
correctly as a.m. (

A

 indicator) or p.m.

(

P

 indicator).

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.

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
alarms, the Hourly Time Signal, the countdown alarm,
and the event timer alarm all operate normally.

To toggle the button operation tone on and off

In any mode (except when a setting screen is on the
display), hold down 

B

 to toggle the button operation tone

on (  not displayed) and off (  displayed).

Holding down 

B

 to toggle 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.

Scrolling

The 

C

 and 

D

 buttons 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 at high speed. This is true except when the countdown timer number
is flashing on the Countdown Timer Mode screen.

Auto Return Features

If you leave the watch in the Alarm Mode for two or three minutes without performing

   any operation, it changes to the Timekeeping Mode automatically.

If you leave a screen with flashing digits on the display for two or three minutes

   without performing any operation, the watch exits the setting screen automatically.

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 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.

World Time

The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.

All World Time Mode times are calculated from the current Home City time in the
Timekeeping Mode using UTC time differential values.

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.

Illumination Precautions

An LED (light-emitting diode) illuminates the display for easy reading in the dark. In
any mode (except when a setting screen is on the display), press 

L

 to turn on

illumination for about two seconds.

Illumination may be hard to see when viewed under direct sunlight.

Illumination turns off automatically whenever an alarm sounds.

Frequent use of illumination runs down the battery.

City

City

UTC

Other major cities in same time zone

Code

Differential

Pago Pago

Honolulu

Anchorage
Vancouver

San Francisco

Los Angeles

Denver

Mexico City

Chicago

Miami

New York

Caracas

St. Johns

Rio De Janeiro

Praia

Lisbon

London

Barcelona

Paris
Milan

Rome
Berlin

Athens

Johannesburg

Istanbul

Cairo

Jerusalem

Moscow

Jeddah

Tehran

Dubai
Kabul

Karachi

Male
Delhi

Dhaka

Yangon

Bangkok

Singapore

Hong Kong

Beijing

Seoul
Tokyo

Adelaide

Guam

Sydney

Noumea

Wellington

–11.0
–10.0
–09.0
–08.0

–07.0
–06.0

–05.0

–04.0
–03.5
–03.0
–01.0
+00.0

+01.0

+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

Papeete
Nome
Las Vegas, Seattle/Tacoma, Dawson City

El Paso, Edmonton
Winnipeg, Houston, Dallas/Fort Worth, New Orleans

Montreal, Detroit, Boston, Panama City, Havana, Lima,
Bogota
La Paz, Santiago, Port Of Spain

Sao Paulo, Buenos Aires, Brasilia, Montevideo

Dublin, Casablanca, Dakar, Abidjan

Amsterdam, Algiers, Hamburg, Frankfurt, Vienna,
Stockholm, Madrid

Helsinki, Beirut, Damascus, Cape Town

Kuwait, Riyadh, Aden, Addis Ababa, Nairobi

Shiraz
Abu Dhabi, Muscat

Mumbai, Kolkata, Colombo

Jakarta, Phnom Penh, Hanoi, Vientiane
Kuala Lumpur, Taipei, Manila, Perth, Ulaanbaatar

Pyongyang

Darwin
Melbourne, Rabaul

Port Vila
Christchurch, Nadi, Nauru Island

PPG
HNL
ANC
YVR
SFO

LAX

DEN
MEX

CHI
MIA

NYC
CCS

YYT

RIO
RAI

LIS

LON
BCN
PAR

MIL

ROM

BER
ATH

JNB

IST
CAI

JRS

MOW

JED

THR
DXB

KBL

KHI

MLE
DEL
DAC

RGN

BKK

SIN

HKG

BJS
SEL

TYO
ADL

GUM

SYD

NOU
WLG

City Code Table

*Based on data as of December 2006.

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