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Operation Guide 2877
World Time
World Time shows the current time in 27 cities (29 time
zones) around the world.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing D.
To view the time in another city code
In the World Time Mode, press C to scroll through city
codes (time zones) to the east or A to scroll to the west.
• For full information about city codes, see the “City Code
Table”.
• If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City code settings
and make the necessary changes.
City code
Current time in the zone
of the selected city code
Timekeepin
g
Mode time
Hourly time signal
on indicator
Alarm on indicator
Alarm time (Hour : Minutes)
Timekeeping Mode time
AM indicator
• When the currently selected time zone is one that includes mostly ocean, a value
indicating the zone’s Greenwich Mean Time differential appears in place of a city
code.
To toggle a city code time between Standard Time and Daylight Saving Time
1.In the World Time Mode, use A and C to display the
city code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.
2.Hold down B for about one second to toggle Daylight
Saving Time (DST displayed) and Standard Time (DST
not displayed).
• The DST indicator is 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.
Alarm
When the alarm is turned on, the alarm sounds when the
alarm time is reached. You can also turn on an Hourly
Time Signal, which will cause the watch to beep twice
every hour on the hour.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing D.
To set the alarm time
1.In the Alarm Mode, hold down B until the hour setting
of the alarm time starts to flash, which indicates the
setting screen.
• This operation automatically turns on the alarm.
2.Press D to move the flashing between the hour and
minute settings.
3. While a setting is flashing, use C (+) and A (–) to change it.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (
A
indicator) or p.m. (
P
indicator).
4. Press B to exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds, regardless of the mode the
watch is in.
• To stop the alarm tone after it starts to sound, press any button.
To test the alarm
In the Alarm Mode, hold down C to sound the alarm.
To turn the Daily Alarm and the Hourly Time Signal on and off
In the Alarm Mode, press A to cycle through the settings as shown below.
Hourly Time Signal On Indicator / Alarm On Indicator
Signal Off
Alarm On
Signal Off
Alarm Off
Signal On
Alarm On
Signal On
Alarm Off
• The alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.
Auto light switch on indicator
Parallel to ground More than 40
°
Illumination
The display of the watch is illuminated using an EL
(electro-luminescent) panel for easy reading in the dark.
The watch’s auto light switch automatically turns on
illumination when you angle the watch towards your face.
• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
• You can specify 1.5 seconds or 2.5 seconds as the
illumination duration.
• See “Illumination Precautions” for other important
information about using illumination.
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on, whenever you position
your wrist as described below in any mode.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
To turn on illumination manually
The button you need to press to illuminate the display depends on the mode you are in.
• In the Timekeeping*, Stopwatch, or Countdown Timer Mode*, press C.
*
If the Timekeeping Mode or Countdown Timer Mode setting screen is on the
display, press
E
.
• In the Recall, World Time, or Alarm Mode, press E.
• The above operation turns on illumination regardless of the current auto light switch
setting.
Warning!
••
••
• Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
startle or distract others around you.
••
••
• When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create
a distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down C for about two seconds to toggle the auto light
switch on (
displayed) and off ( not displayed).
• The auto light switch on indicator (
) is on the display in all modes while the auto
light switch is turned on.
• In order to protect against running down the battery, the auto light switch will turn off
automatically approximately six hours after you turn it on. Repeat the above
procedure to turn the auto light switch back on if you want.
To specify the illumination duration
1.In the Timekeeping Mode, hold down B until the
seconds start to flash, which indicates the setting
screen.
2.Press A to toggle the illumination duration setting
between 2.5 seconds (
) and 1.5 seconds ( ).
3.Press B to exit the setting screen.
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 Return Feature
If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
Scrolling
The A and C 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 through the data at high speed.
Initial Screens
When you enter the World Time Mode, the data you were viewing when you last
exited the mode appears first.
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.
• 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
A
(AM) 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.
• 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 World Time Mode times are calculated from the current Home City time setting
in the Timekeeping Mode, using the Greenwich Mean Time (GMT) differentials
associated with each city code.
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
• The GMT differential is a value that indicates the time difference between Greenwich
Mean Time and the time zone where a city is located.
• GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC) data.
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 shortens the battery life.