Seiko S651 User manual

INSTRUCTIONS (P. 3)
BEDIENUNGSANLEITUNG (S. 25)
INSTRUCTIONS (P. 48)
ISTRUZIONI (P. 70)
INSTRUCCIONES (P. 94)
INSTRUÇÕES (P. 116)
用法説明 (137 頁)
Cal. S651

2
English
You are now the proud owner of a SEIKO Digital Quartz Watch Cal. S651. For best results, please
read the instructions in this booklet carefully before using your SEIKO Digital Quartz Watch.
Please keep this manual handy for ready reference.
Sie sind jetzt Besitzer einer SEIKO Digital-Quarzuhr Kal. S651. Bitte lesen Sie diese Bedienungsan-
leitung vor Verwendung der Uhr sorgfältig durch und heben Sie sie gut auf.
Vous voici l’heureux propriétaire d’une montre numérique SEIKO quartz Cal. S651. Pour obtenir
d’excellentes performances de cet article SEIKO, veuillez lire attentivement cette brochure que
vous conserverez pour toute référence ultérieure.
Siete ora in possesso di un orologio SEIKO digitale al quarzo Cal. S651. Per ottenere i migliori
possibili risultati dal Vostro orologio, leggere attentamente le istruzioni di questo manuale prima
di utilizzare il Vostro orologio SEIKO digitale al quarzo. Conservare poi il manuale stesso per ogni
qualsiasi eventuale futuro riferimento.
Enhorabuena por su adquisición de un reloj SEIKO digital de cuarzo Cal. S651. Para óptimo
resultado, lea detenidamente las instrucciones de este folleto antes de usar el reloj. Guarde este
manual para consulta posterior.
Você pode sentir-se orgulhoso de possuir um Relógio SEIKO Quartz Digital Cal. S651. Para obter
os melhores resultados, leia atentamente as instruções contidas neste opúsculo antes de usar o
seu Relógio SEIKO Quartz Digital. Queira conservar este manual para referências futuras.

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English
ENGLISH
CONTENTS
Page
MODE CHANGE ...................................................................................................... 5
TIME/CALENDAR SETTING ..................................................................................... 6
STOPWATCH ........................................................................................................... 8
TIMER ...................................................................................................................... 10
ALARM .................................................................................................................... 12
ILLUMINATING LIGHT ............................................................................................. 14
NOTES ON USING THE WATCH ............................................................................. 15
BATTERY CHANGE .................................................................................................. 18
TO PRESERVE THE QUALITY OF YOUR WATCH................................................... 20
SPECIFICATIONS ..................................................................................................... 23

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English
CAL. S651
TIME/CALENDAR
STOPWATCH
●Measures up to 10 hours in 1/100 second increments.
●Memory recall function: Up to 8 lap times can be stored in memory.
TIMER
●Preset timer function: Four different lengths of time have been preset.
●Adjustable timer function: Can be set for up to 9 hours and 59 minutes in one-minute
increments.
ALARM
AUTO ILLUMINATION FUNCTION
●The display is illuminated for 2 seconds with each press of any of the buttons.
●While the stopwatch or timer is counting, the display is illuminated for 2 seconds every
minute to signal the lapse of time.
ILLUMINATING LIGHT (ELECTROLUMINESCENT PANEL)

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English
MODE CHANGE
AWith each press, the mode changes in the following order:
TIME/
CALENDAR
mode ➡STOPWATCH
mode ➡TIMER mode ➡ALARM mode
➡
A
BC
D
E

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TIME/CALENDAR SETTING
Month
AD
BC
“A” (AM)/“P” (PM) mark
Day
Date
Auto illumination mark
BPress and hold for 2 to 3 seconds to show
TIME/CALENDAR SETTING display.
▼
CPress repeatedly to select the digits (flash-
ing) to be adjusted.
▲
▲
▲
Minutes
Seconds
Auto
illumination
on/off Hour
Date
▲
Month
▲ ▲
12-/24-hour
indication Year
▲
▲
▼
D
▼
▼
B
*
*See the next page.
Press to return to TIME/CALENDAR mode.
Press to set the flashing digits.
▼
APress to show TIME/CALENDAR mode.

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●TURNING ON/OFF OF THE AUTO ILLUMINATION
✩The display is illuminated for 2 seconds with each press of any of the buttons.
✩While the stopwatch or timer is counting, the display is illuminated for 2 seconds every
minute to signal the lapse of time.
D
BBPress and hold for 2 to 3 seconds in TIME/
CALENDAR mode.
▼
DWith each press, the auto illumination is
alternately turned on and off.
▼
BPress to return to TIME/CALENDAR mode.
●TURNING ON/OFF OF THE HOURLY TIME SIGNAL AND BUTTON OPERATION
CONFIRMATION SOUND
CCWith each press in TIME/CALENDAR
mode, the hourly time signal and button
operation confirmation sound are alter-
nately turned on and off.
Hourly time signal mark

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English
STOPWATCH
●The stopwatch measures up to 10 hours in 1/100 second increments.
●The first 8 lap times are automatically stored in memory.
APress to show STOPWATCH mode.
AD
BC
Current time
Hour Seconds
1/100 seconds
Minutes
STOPWATCH OPERATION
Standard measurement
C
START
C
STOP RESET
D
▼
▼

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Accumulated elapsed time measurement
C
START
C
STOP RESTART
▼
▼
C
STOP RESET
D
▼
C
○○○○
▼
BPress to activate the memory recall func-
tion.
▼
DWith each press, the stored data are re-
called from the oldest to the newest.
▼
BPress to return to STOPWATCH mode.
* Restart and stop of the stopwatch can be repeated by pressing button C.
Lap time measurement
C
START LAP 1 LAP 2
▼
▼
C
STOP RESET
D
▼
○○○○
▼
DD
* Measurement of lap time can be repeated by pressing button D.
D
Recall mark
●MEMORY RECALL FUNCTION
The stored data can be recalled either during or after the measurement.
B

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English
TIMER
●Two types of timers are available: preset timer and adjustable timer.
●Four different lengths of time have been preset for the preset timer: 3, 5, 10 and 15 minutes.
●The adjustable timer can be set for up to 9 hours and 59 minutes in one minute increments.
AD
BC
Set time
Hour Seconds
Number of times
the countdown is
repeated
Minutes
PRESET TIMER SETTING
APress to show TIMER mode.
DPress repeatedly to select the desired preset time.
▲
3 minutes 5 minutes
▲
10 minutes
▲
15 minutes
▲Adjustable timer
▲

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ADJUSTABLE TIMER SETTING
DPress to select the adjustable timer.
▲
3 minutes 5 minutes
▲
10 minutes
▲
15 minutes
▲Adjustable timer
▲
C
▼
Press to select the digits (flashing) to be ad-
justed.
▼
BPress and hold for 2 to 3 seconds to show ADJUSTABLE TIMER SETTING
display.
▼
▲
Minutes
Hour
▲
DPress to set the flashing digits.
▼
▼
BPress to return to TIMER mode.
TIMER OPERATION
C
START
C
STOP RESTART
▼
▼
C
STOP RESET
D
▼
C
○○○○
▼

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ALARM
●The alarm can be set to ring on a 24-hour basis.
●At the designated time, the display is illuminated as the alarm rings.
ALARM TIME SETTING
Current time
AD
BC
“A” (AM)/
“P” (PM)
mark Set alarm time
Alarm mark
BPress and hold for 2 to 3 seconds to show
ALARM SETTING display.
▼
CPress to select the digits (flashing) to be
adjusted.
▼
▼
APress to show ALARM mode.
▲
Minutes
Hour
▲
▼
D
▼
Press to set the flashing digits.
BPress to return to ALARM mode.
* The alarm and “on” marks are displayed and
the alarm is automatically engaged.
“on”/“– –”
(alarm engagement/
disengagement) mark

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●ALARM ENGAGEMENT/DISENGAGEMENT
CCWith each press in ALARM mode, the
alarm is alternately engaged and disen-
gaged.
Alarm mark
“on” mark
* At the designated time the alarm rings for 20 seconds, and the display is illuminated as the alarm
rings. To stop them manually, press any of the five buttons.

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ILLUMINATING LIGHT (Electroluminescent panel)
●Certain materials emit light when voltage passes through them. This phenomenon, known
as “electroluminescence”, is used to illuminate the display.
E
Press in any mode.
E
* The display is illuminated for 3 seconds.

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NOTES ON USING THE WATCH
MODE CHANGE
●When the confirmation sound is switched on, a beep sounds with each press of button A. As a
reference aid, the pitch is different when the TIME/CALENDAR mode appears.
TIME/CALENDAR SETTING
●The calendar automatically adjusts for odd and even months including February of leap years from the
year 1995 up to the end of 2044.
●Once the year, month and date have been set, the day of the week is automatically set.
●The flashing digits except on/off of the auto illumination function, the seconds and the 12-/24-hour
indication move quickly if button D is kept pressed.
●In setting the seconds, when the seconds read any number from “30” to “59” and button D is pressed,
one minute is added and the seconds are reset to “00”.
●Changeover between 12- and 24-hour indications is made alternately with each press of button D.
●If the watch is left untouched in the TIME/CALENDAR SETTING display with the digits flashing, it will
automatically return to the TIME/CALENDAR mode in 2 to 3 minutes.
●When the hourly time signal mark is displayed, the hourly time signal rings every hour on the hour and
the confirmation sound beeps with each press of the buttons.
●When all the segments light up:
If buttons C and D are pressed at the same time in the TIME/CALENDAR
SETTING display, all the segments of the display will light up as shown
at right. This is not a malfunction.
Press any of the five buttons to return to the TIME/CALENDAR mode
and then, set the time/calendar again.

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English
STOPWATCH
●When button D is pressed to measure a lap time, the lap time measured and lap number remain
displayed for 10 seconds and then, the display automatically returns to the measurement in progress.
●The lap number counts up to “99”. After “99”, the number is displayed in two digits such as “00” for
100, “01” for 101, and so on.
●By turning on both the button operation confirmation sound and auto illumination function, a beep
sounds and the display is illuminated every minute to signal the lapse of time for the first 19 minutes.
The beep sounds every minute after the first 19 minutes.
●Even if the STOPWATCH mode is changed to another while the measurement is in progress, it
continues counting properly and the flashing STOPWATCH mode mark indicates that the stopwatch
is in use. After the stopwatch is used, however, be sure to reset it to prevent the overconsumption
of battery energy that would shorten the battery life.
●In memory recall after measurement, the oldest measurement in memory is displayed first.
In memory recall during measurement, the newest one is displayed first.
TIMER
●In the adjustable timer setting, the flashing digits move quickly if button D is kept pressed.
●If the watch is left untouched in the TIMER SETTING display with the digits flashing, it will
automatically return to the TIMER mode in 2 to 3 minutes.
●Restart and stop of the timer can be repeated by pressing button C.
●When the set time is up, a warning sound beeps for 5 seconds. To stop it manually, press any of the
five buttons.
●After the set time is up, the timer counts down the set time repeatedly. After the timer is used,
therefore, be sure to reset it.
●After the countdown is repeated 99 times, the number of times the countdown is repeated is displayed
in two digits such as “00” for 100, “01” for 101, and so on.
●By turning on the button operation confirmation sound, a beep sounds every minute to signal the lapse
of time.

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●By turning on the auto illumination function, the display is illuminated every minute to signal the lapse
of time for the last 19 minutes of the countdown. If the countdown is repeated more than 10 times,
however, the display will not be illuminated.
●Even if the TIMER mode is changed to another while the measurement is in progress, it continues
counting properly and the flashing TIMER mode mark indicates that the timer is in use. After the timer
is used, however, be sure to reset it to prevent the overconsumption of battery energy that would
shorten the battery life.
ALARM
●In the alarm time setting, the flashing digits move quickly if button D is kept pressed.
●When the time function is displayed in the 24-hour indication, the alarm is also displayed in the 24-hour
indication.
●When setting the hour digits in the 12-hour indication, check that AM/PM is properly set.
●If the watch is left untouched in the ALARM SETTING display with the digits flashing, it will
automatically return to the ALARM mode in 2 to 3 minutes.
●The alarm can be tested by keeping buttons C and D pressed at the same time in the TIME/CALENDAR
mode.
ILLUMINATING LIGHT (Electroluminescent panel)
●The electroluminescent panel loses its luminance as the battery voltage decreases. Also, its
luminance level decreases gradually with use. After 240 hours of use, the level decreases by about
half.
●When the illuminating light becomes dim, replace the battery with a new one. If the illuminating light
remains dim after the battery is replaced, have the electroluminescent panel replaced with a new one
by the retailer from whom the watch was purchased, or an AUTHORIZED SEIKO DEALER. It will be
replaced at cost.
●While the illuminating light is used, the watch gives out a slight noise. However, this is not a
malfunction.

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BATTERY CHANGE
The miniature battery which powers your watch should last approximately
2 years. However, because the battery is inserted at the factory to check
the function and performance of the watch, its actual life once in your
possession may be less than the specified period. When the battery expires,
be sure to replace it as soon as possible to prevent any malfunction. For
battery replacement, we recommend that you contact an AUTHORIZED
SEIKO DEALER and request SEIKO CR2025 battery.
2
Years
* The battery life may be less than 2 years if:
• the stopwatch is used for more than 10 hours a day,
• the timer is used for more than 10 hours a day,
• the alarm is used more than once a day,
• the illuminating light is used more than 3 times a day,
• the auto illumination function is used more than 30 times a week, and/or
• the confirmation sound is used more than 24 times a day.
●Battery life indicator
When all the digits start flashing, replace the battery with a new one as soon as
possible. Otherwise, the watch will stop operating in 2 to 3 days. We suggest that
you have the battery replaced by a SEIKO DEALER.
* Even though the display is flashing, time accuracy is not affected.
●Necessary procedure after battery change
After the battery is replaced with a new one, or an abnormal display (broken digits,
etc.) appears, follow the procedure below to reset the IC.

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D
Press and hold buttons A, B, C and D at the same
time for 2 to 3 seconds.
* The display shown at right appears when the buttons are
released.
* Before using the watch, set the time/calendar and then the
alarm.
C
B
A
●Never short-circuit, heat or otherwise tamper with the battery, and never
expose it to fire. The battery may burst, become very hot or catch fire.
●The battery is not rechargeable. Never attempt to recharge it, as this may cause
battery leakage or damage to the battery.
CAUTION
●Do not remove the battery from the watch.
●If it is necessary to take out the battery, keep it out of the reach of children. If
a child swallows it, consult a doctor immediately.
WARNING

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TO PRESERVE THE QUALITY OF YOUR WATCH
Condition
of use
WATER
RESISTANT
5 BAR
WATER
RESISTANT
No indication
Indication on
case back
Non-water
resistant
Degree
of water
resistance*
Accidental
contact with
water such
as rain and
splashes
Swimming,
yachting and
taking a
shower
No No No No
Yes No No No
Yes Yes No No
Yes Yes Yes No
WATER
RESISTANT
10/15/20 BAR
Scuba
diving**
and
saturation
diving
Taking a bath
and shallow
diving
3 bar
5 bar
10/15/20 bar
■WATER RESISTANCE