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Operation Guide 3786
World Time
The World Time Mode digitally displays the current time in
48 cities (29 time zones) around the world.
• If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
City code
Current time in
selected city
To view the time in another city
While in the World Time Mode, press D to scroll through the city codes (time zones)
to the east.
• For full information on city codes, see the "City Code Table".
To toggle a city code time between Standard Time and Daylight Saving Time
1. In the World Time Mode, use D to display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down A to toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator
not displayed).
DST indicator
• Note that you cannot use the World Time Mode to change the DST setting of the
Home City code you currently have selected in the Timekeeping Mode. See "To
toggle the Timekeeping Mode digital time between DST and Standard Time" for
information about turning the Home City code DST setting on and off.
• The DST indicator will appear 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.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
Minutes
and two finishes.
Seconds
• The display range of the stopwatch is 59 minutes, 59.99
seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
1/100 second
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
To measure times with the stopwatch
Elapsed Time
D
➤
D
➤
D
Start
Stop
Re-start
Split Time
D
➤
A
➤
A
Start
Split
Split release
Two Finishes
D
D
➤
A
➤
Start
Split
Stop
First runner
Second runner
finishes.
finishes.
Display time of
first runner.
Countdown Timer
You can set the countdown timer within a range of one to
Minutes
60 minutes. An alarm sounds when the countdown
Seconds
reaches zero.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
To set the countdown start time
1. While the countdown start time is on the display in the Countdown Timer Mode,
hold down A until the current countdown start time starts to flash, which indicates
the setting screen.
• If the countdown start time is not displayed, use the procedure under "To use the
countdown timer" to display it.
2. While a setting is flashing, use D (+) and B (–) to change it.
3. Press A to exit the setting screen.
To use the countdown timer
Press D while in the Countdown Timer Mode to start the countdown timer.
• When the end of the countdown is reached, the alarm sounds for 10 seconds or until
you stop it by pressing any button. The countdown time is automatically reset to its
starting value after the alarm stops.
• Press D while a countdown operation is in progress to pause it. Press D again to
resume the countdown.
• To completely stop a countdown operation, first pause it (by pressing D), and then
press A. This returns the countdown time to its starting value.
Alarm
Alarm on indicator
To set the alarm time
1. In the Alarm Mode, hold down A 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 C to move the flashing between the hour and minute settings.
3. While a setting is flashing, use D (+) and B (–) to change it.
• When setting the alarm time using the 12-hour format, take care to set the time
4. Press A 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 D to sound the alarm.
To turn the Daily alarm and the Hourly Time Signal on and off
In the Alarm Mode, press D to cycle through the settings shown below.
• 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.
Illumination
D
A
➤
➤
Stop
Clear
A
➤
D
➤
Stop
Clear
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
➤
A
➤
A
functions of this watch.
Clear
Split release
Display time of
Auto Return Features
second runner.
• If you leave the watch in the Alarm or Hand Setting Mode for two or three minutes
without performing any operation, it automatically returns to the Timekeeping Mode.
• If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
Scrolling
The B 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 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.
• 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.
• 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.
Alarm time
When the alarm is turned on, the alarm sounds when the
(Hour : Minutes)
alarm time is reached. You can also turn on an Hourly
Time Signal, which will cause the watch to beep twice
PM indicator
every hour on the hour.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Hourly time signal
on indicator
correctly as a.m. (no indicator) or p.m. (P indicator).
Alarm On Indicator / Hourly Time Signal On Indicator
Alarm Off
Alarm On
Signal Off
Signal Off
An LED (light-emitting diode) and light guide panel
illuminate the digital display for easy reading in the dark.
• See "Illumination Precautions" for other important
information.
To turn on illumination
In any mode, press B to illuminate the display.
• You can specify 1.5 seconds or 2.5 seconds as the
illumination duration. See "To set the digital time and
date" for more information.
Alarm Off
Alarm On
Signal On
Signal On
2
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