User manual
Operation Guide 3287
E-28
Alarms: 5 daily alarms (4 one-time alarms: 1 snooze alarm); Hourly Time Signal
Illumination: LED (light-emitting diode); 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)
Frequent use of illumination runs down the battery.
E-27
Specifications
Accuracy at normal temperature: ±30 seconds a month
Timekeeping: Hour, minutes, seconds, a.m. (A)/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 finishes
Countdown Timer
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
E-26
Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
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.
E-25
• Holding down C to turn the button operation tone on or off also causes the watch’s
current mode to change.
• The
indicator is displayed in all modes when the button operation tone is turned
off.
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 saves any settings you have made up
to that point and exits the setting screen automatically.
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 scrolls at high
speed.
E-24
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 alarm,
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 (
not displayed) and off ( displayed).
E-23
To illuminate the display
In any mode (except when a setting screen is on the display), press B to turn on
illumination.
• You can use the procedure below to select either 1.5 seconds or 3 seconds as the
illumination duration. When you press B, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current setting.
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. While the seconds are flashing, press B to toggle the
illumination duration between 1.5 seconds (
) and 3
seconds (
).
3. Press A to exit the setting screen.
E-22
Illumination
Two LEDs (light-emitting diodes) illuminate the display for
easy reading in the dark.
Illumination Precautions
• 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.
E-21
To turn the Hourly Time Signal on and off
1. In the Alarm Mode, use D to select the Hourly Time
Signal (
).
2. Press A to toggle it on (
displayed) and off
(
displayed).
• The Hourly Time Signal on indicator is shown on the
display in all modes while the Hourly Time Signal is
turned on.
On/Off status
Hourly time signal
on indicator
E-20
To turn an alarm on and off
1. In the Alarm Mode, use D to select an alarm.
2. Press A to toggle it on (
displayed) and off
(
displayed).
• Turning on a one-time alarm (
through )
displays the alarm on indicator on its Alarm Mode
screen.
• Turning on the snooze alarm (
) 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
alarm that is turned on currently.
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator flashes during the 5-minute
intervals between alarms.
On/Off status
Alarm on indicator
Snooze alarm indicator




