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Operation Guide 3188
L-1
City Code Table
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Alarms: 5 daily alarms (4 one-time alarms: 1 snooze alarm); Hourly Time Signal
Illumination: EL Backlight (electro-luminescent panel); Selectable illumination
duration
Other: Button operation tone on/off
Battery: One lithium battery (Type: CR1616)
Approximately 3 years on type CR1616 (assuming alarm operation 10 seconds per
day, and one illumination operation 1.5 seconds per day)
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Specifi cations
Accuracy at normal temperature: ±30 seconds a month
Timekeeping: Hour, minutes, seconds, a.m./p.m. (P), day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Daylight Saving
Time (summer time)/Standard Time
World Time: 48 cities (29 time zones)
Other: Daylight Saving Time/Standard Time
Stopwatch
Measuring unit: 1/100 second
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time, two fi nishes
Countdown Timer
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
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Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears fi rst.
World Time
The seconds count of the World Time is synchronized with the seconds count of the x
Timekeeping Mode.
All World Time Mode times are calculated from the current Home City time in the x
Timekeeping Mode using UTC time differential values.
The UTC differential is a value that indicates the time difference between a x
reference point in Greenwich, England and the time zone where a city is located.
The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the x
world-wide scientifi c 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.
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Holding down x C to turn the button operation tone on or off also causes the watch’s
current mode to change.
The MUTE indicator is displayed in all modes when the button operation tone is x
turned off.
Auto Return Features
If you leave the watch in the Alarm Mode for two or three minutes without performing x
any operation, it automatically changes to the Timekeeping Mode.
If you leave a screen with fl ashing digits or a cursor on the display for two or three x
minutes without performing any operation, the watch automatically saves any
settings you have made up to that point and 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 at high speed.
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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
MUTE indicator
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 alarm, x
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down C to toggle the button operation tone
on (MUTE indicator not displayed) and off (MUTE indicator
displayed).
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To illuminate the display
In any mode, press L to turn on illumination.
You can use the procedure below to select either 1.5 seconds or 3 seconds as the x
illumination duration. When you press L, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current illumination duration setting.
To specify the illumination duration
In the Timekeeping Mode, hold down 1. A until the
seconds start to fl ash, which indicates the setting
screen.
While the seconds are fl ashing, press 2. B to toggle the
illumination duration between 1.5 seconds (
) and
3 seconds (
).
Press 3. A to exit the setting screen.
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Illumination
This watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark.
Illumination Precautions
The electro-luminescent panel that provides illumination x
loses power after very long use.
Illumination may be hard to see when viewed under direct x
sunlight.
The watch may emit an audible sound whenever the x
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 x
sounds.
Frequent use of illumination runs down the battery. x
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To turn the Hourly Time Signal on and off
Hourly time signal
on indicator
On/Off status
In the Alarm Mode, use 1. D and B to select the Hourly
Time Signal (
).
Press 2. A to toggle it on (
displayed) and off
(
displayed).
The Hourly Time Signal on indicator is shown on the x
display in all modes while the Hourly Time Signal is
turned on.
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To turn an alarm on and off
Alarm on
indicator
Snooze alarm indicator
On/Off status
In the Alarm Mode, use 1. D and B to select an alarm.
Press 2. A to toggle it on (
displayed) and off
(
displayed).
Turning on a one-time alarm ( x
through )
displays the alarm on indicator on its Alarm Mode screen.
Turning on the snooze alarm ( x
) displays the alarm
on indicator and snooze alarm indicator on the Alarm
Mode snooze alarm screen.
In all modes, the alarm on indicator is shown for any x
alarm that is currently turned on.
The alarm on indicator fl ashes while the alarm is x
sounding.
The snooze alarm indicator fl ashes during the 5-minute x
intervals between alarms.