Operation Guide 5479
E-39
Countdown Timer:
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Stopwatch:
Measuring unit: 1/100 of a second
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time, two fi nishes
Other: 2 analog hands: hour, minutes (hand moves every 20seconds)
Battery: One lithium battery (Type: CR2025)
Approximately 10 years on type CR2025 (assuming alarm operation 10 sec./day)
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Specifi cations
Accuracy at normal temperature: ± 30 seconds a month
Timekeeping: Hour, minutes, seconds, a.m. (A)/p.m. (P), month, 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:  2 screen formats (Date, Time); Daylight Saving Time (summer time)/
Standard Time
Telememo:
Memory capacity:  Up to 30 records, each including a name (8 characters) and 
telephone number (16 digits)
Other: Remaining memory screen; Auto sort
World Time: 30 cities (29 time zones)
Other: Daylight Saving Time/Standard Time
Alarms: 3 daily alarms (2 one-time alarms: 1 snooze alarm); Hourly Time Signal
E-37
To measure times with the stopwatch
Elapsed Time
D
D D D A
Start Stop Resume Stop Reset
Split Time
D
A A D A
Start Split Split release Stop Reset
Two Finishes
D
A D A A
Start Split
First runner fi nishes.
Display time of fi rst 
runner.
Stop
Second runner 
fi nishes.
Split release
Display time of 
second runner.
Reset
E-36
Stopwatch
The stopwatch lets you measure elapsed time, split 
times, and two fi nishes.
 x  The display range of the stopwatch is 23hours, 
59minutes, 59.99seconds.
 x  The stopwatch continues to run, restarting from zero 
after it reaches its limit, until you stop it.
 x  The stopwatch measurement operation continues even if 
you exit the Stopwatch Mode.
 x  Exiting the Stopwatch Mode while a split time is frozen 
on the display clears the split time and returns to 
elapsed time measurement.
 x  All of the operations in this section are performed in
 
the Stopwatch Mode, which you enter by pressing C 
(page E-7).
Hours
Minutes
Seconds
1/100 second
E-35
To use the countdown timer
Press D while in the Countdown Timer Mode to start the 
countdown timer.
 x  When the end of the countdown is reached, the alarm 
sounds for 10seconds or until you stop it by pressing 
any button. The countdown time is automatically reset to 
its starting value after the alarm stops.
 x  Press D while a countdown operation is in progress to pause it. Press D again to 
resume the countdown.
 x  To completely stop a countdown operation, fi
 rst pause it (by pressing D), and 
then press A. This returns the countdown time to its starting value.
 x  The countdown timer measurement operation continues even if you exit the
 
Countdown Timer Mode.
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Countdown Timer
The countdown timer can be set within a range of 
one minute to 24hours. An alarm sounds when the 
countdown reaches zero.
 x  All of the operations in this section are performed in the 
Countdown Timer Mode, which you enter by pressing 
C (page E-7).
To set the countdown start time
1.  
In the Countdown Timer Mode, hold down A until the 
hour setting of the countdown start time starts to fl ash, 
which indicates the setting screen.
2.  Press C to move the fl ashing between the hour and minute settings.
3.  While a setting is fl ashing, use D (+) and B (–) to change it.
 x  To set the starting value of the countdown time to 24hours, set 0:00.
4.  Press A to exit the setting screen.
Hours
Minutes
Seconds
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 x  The above on indicators appear on the display in all modes.
 x  An on indicator on the display fl ashes while its corresponding alarm operation 
is sounding.
 x  The snooze alarm on indicator fl ashes during the 5-minute intervals between 
alarms.
E-32
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
 To turn an alarm and the Hourly Time Signal on and off
1.  In the Alarm Mode, use D to select an alarm or the Hourly Time Signal.
2.  Press A to toggle it on and off.
 x  The indicators shown below appear on the display when the daily alarm 
and Hourly Time Signal are turned on. Each indicator disappears when the
 
corresponding function is turned off.
Alarm 2 on indicator
Snooze alarm on indicator
Alarm 1 on indicator
Hourly time signal on indicator
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4.  While a setting is fl ashing, use D (+) and B (–) to change it.
 x  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).
5.  Press A to exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10seconds, regardless of the mode 
the watch is in. In the case of the snooze alarm, the alarm operation is performed a 
total of seven times, every fi ve minutes, or until you turn the alarm off (page E-32).
 x  Alarm and Hourly Time Signal operations are performed in accordance with the 
Timekeeping Mode digital time.
 x  To stop the alarm tone after it starts to sound, press any button.
 x  Performing any one of the following operations during a 5-minute interval between 
snooze alarms cancels the current snooze alarm operation.
 −  Displaying the Timekeeping Mode setting screen (page E-6)
 −  Displaying the SNZ setting screen (page E-30)
E-30
To set an alarm time
1.  In the Alarm Mode, use D to scroll through the alarm 
screens until the one whose time you want to set is 
displayed.
 SNZ AL2AL1 SIG
DDD
D
 x  To set a one-time alarm, display one of the screens indicated by an alarm 
number AL1 or AL2. To set the snooze alarm, display the screen indicated by 
SNZ.
 x  The snooze alarm repeats every fi ve minutes.
2.  After you select an alarm, hold down A until the hour setting of the alarm time 
starts to fl
 ash, which indicates the setting screen.
 x  This operation automatically turns on the alarm.
3.  Press C to move the fl ashing between the hour and minute settings.