Seiko 7T82 User manual

You are now the proud owner of a SEIKO 1/100-Second Retrograde
Chronograph Cal. 7T82. For best results, please read the instructions in this
booklet carefully before using your SEIKO Analogue Quartz Watch. Please
keep this manual handy for ready reference.
Es usted ahora el orgulloso propietario del Cronógrafo Retrógrado de 1/100
de Segundo de SEIKO, Cal. 7T82. Para óptimo resultado, lea detenidamente
las instrucciones de este folleto antes de usar el reloj. Guarde este manual
para consulta posterior.

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ENGLISH
CONTENTS
Page
FEATURES ............................................................................................................... 4
SCREW DOWN CROWN ......................................................................................... 6
TIME AND CALENDAR SETTING AND
STOPWATCH HAND POSITION ADJUSTMENT ..................................................... 7
HOW TO USE THE STOPWATCH ........................................................................... 12
DEMONSTRATION FUNCTION OF THE STOPWACH HAND MOVEMENT ........... 16
TACHYMETER (for models with tachymeter scale on the dial) ............................... 17
TELEMETER (for models with telemeter scale on the dial) ..................................... 19
BATTERY CHANGE .................................................................................................. 21
NECESSARY PROCEDURE AFTER BATTERY CHANGE ......................................... 23
TROUBLESHOOTING .............................................................................................. 24
SPECIFICATIONS ..................................................................................................... 26
✩
For the care of your watch, see “TO PRESERVE THE QUALITY OF YOUR
WATCH” in the attached Worldwide Guarantee and Instruction Booklet.

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a b c
Hour hand
Minute hand
STOPWATCH second hand
STOPWATCH minute hand
Small second hand
Date
a: Normal position:
b: First click:
Date setting
c: Second click:
Time setting,
Hand position adjustment
STOPWATCH 1/100-second hand
STOPWATCH 1/10-second hand
• If your watch has a screw down crown, refer to "SCREW DOWN CROWN" section
on the next page.
• Simplified illustrations are used in the following sections of this manual.
CAL. 7T82
■TIME/CALENDAR
Hour, minute and small second hands
■STOPWATCH
• 40-minute measurement in 1/100-second increments, consecutively meas-
urable up to 120 minutes
• 4 STOPWATCH hands
1/100-second, 1/10-second, second and minute hands
• Split time measurement on demand
• 1/100-second high-speed movement
The STOPWATCH 1/100-second hand makes 10 full circles in one sec-
ond.
• 40-minute dial with a retrograde minute hand
When the minute counting reaches 40 minutes, the STOPWATCH minute
hand immediately returns and continues counting from 41 minutes
onward. The minute counting is repeated in the same manner for
another rotation, up to 120 minutes, at that time the stopwatch automati-
cally stops counting.
FEATURES
1/100 SEC.
1/100 SEC.
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60
15
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40
MIN.
MIN.
A
B
CROWN

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TIME AND CALENDAR SETTING AND
STOPWATCH HAND POSITION ADJUSTMENT
STOPWATCH second hand
STOPWATCH minute hand
STOPWATCH 1/100-second hand
STOPWATCH 1/10-second hand
Hour hand
●This watch is designed so that the following adjustments are made with the crown
at the second click position:
1) time setting
2) stopwatch hand position adjustment
Once the crown is pulled out to the second click, be sure to make both the above
adjustments 1) and 2) at the same time.
Small second hand
Minute hand
●The date adjustment is done with the crown at first click position.
SCREW DOWN CROWN
• Some models have a screw down crown to prevent accidental operation and help
maintain water-resistant quality.
• To use the crown, it is necessary to unlock the crown first before pulling it out, and
it is important to securely screw the crown in after each use.
HOW TO OPERATE THE SCREW DOWN CROWN
The crown must be securely locked in the case except when you use it to set the
watch.
* When screwing the crown in, ensure that the crown is correctly aligned and turn it
gently. If it is too hard to turn, unscrew it first, and then rewind it. Do not screw it
in by force as it may damage the thread of the screw or the case.
<How to unlock the crown>
Turn the crown counterclockwise to unscrew it.
The crown is released and projected outward
from its original position.
<How to lock the crown>
Turn the crown clockwise while pressing it to the
case until it is screwed all the way in and locked.
The crown is locked.
The crown is unlocked
and can be pulled out.
CROWN
1/100 SEC.
1/100 SEC.
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15
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MIN.
MIN.

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* It is recommended that the minute hand
be set 4 to 5 minutes ahead of the time,
and then turn it back to the exact minute.
CROWN Turn clockwise to advance hour and
minute hands past 12:00 AM. Doing so
will advance the date to the current
date.
CROWN Set the hour and minute hands to the
desired time taking AM and PM into
consideration.
1. It is necessary to adjust the date at the end of February and 30-day months.
2. Do not set the date between 9:00 p.m. and 1:00 a.m. Otherwise, the date may not
change properly.
60
60
15
15
30
30
45
45
Current date
1) TIME AND CALENDAR SETTING
CROWN Pull out to first click.
CROWN Turn clockwise until the previous day's
date appears.
Small second hand
60
60
15
15
30
30
45
45
Pull out to second click when the small
second hand is at the 12 o’clock posi-
tion. The small second hand will stop
on the spot.
CROWN
* If the crown is pulled out when the
stopwatch is measuring, the stopwatch
will be automatically reset.
Previous day's date
Minute hand
Hour hand

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●If Button is pressed again for 2 seconds, you can go back to the
adjustment of 1/10- and 1/100-second hands and so on in the following
order.
APress for 2 seconds.
* STOPWATCH minute hand turns a full
circle.
Press repeatedly to set it to the “0”
position.
* The hand moves quickly if Button B is
kept pressed.
* STOPWATCH minute hand turns a full
circle passing the 40-minute marker
only during the STOPWATCH hand
position adjustment.
0
10
10
20
20
30
30
40
40
MIN.
MIN.
After all the adjustments are completed,
push back in to the normal position in
accordance with a time signal.
CROWN
B
A
B
A
STOPWATCH
second hand
STOPWATCH
minute hand
STOPWATCH
1/10- and 1/100-second
hands
2) STOPWATCH HAND POSITION ADJUSTMENT
✩If the STOPWATCH hands are not in the “0” position, follow the procedure below to set them
to the “0” position.
B
APress for 2 seconds.
* STOPWATCH 1/10-second and 1/100-
second hands turn a full circle.
Press repeatedly to set the STOPWATCH
hands to the “0” position.
* The hands move quickly if Button B is
kept pressed.
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BPress repeatedly to set it to the “0”
position.
* The hand moves quickly if Button B is
kept pressed.
* STOPWATCH second hand turns a full
circle.
Press for 2 seconds.
A
B
A
A
B

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• Reading the 1/100-second and 1/10-second hands requires extra attention.
<Remarks on the STOPWATCH minute hand movement>
• When the minute counting reaches 40 minutes, the STOPWATCH minute hand
immediately returns and continues counting from 41 minutes onward. The minute
counting is repeated in the same manner for another rotation, up to 120 minutes,
at that time the stopwatch automatically stops.
• The final position of the STOPWATCH minute hand, after completing 120 minutes
of counting, is illustrated below.
* The display illustrated at the left should be read as
“19,” not "29." When the 1/100-second hand is
moving toward larger numbers, the 1/10 second
hand comes close to the next marker, which may
cause you to wrongly read the hands as "29."
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40
• Before starting to use the stopwatch again, make sure to reset the stopwatch by
pressing Button B.
HOW TO USE THE STOPWATCH
●The stopwatch features a 40-minute dial with a retrograde minute hand.
●The stopwatch can consecutively measure up to 120 minutes in 1/100-second
increments. When the measurement reaches 120 minutes, the stopwatch auto-
matically stops counting.
●Split time measurement is possible.
●After 3 minutes of timing from a start, the STOPWATCH 1/100-second and 1/10-
second hands remain pointing to the “0” position until the watch is stopped or
split time measurement is made, at such a time, they move to display the
measured time. They start to move for a maximum of three minutes after the
watch is restarted or the split time display is released.
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<How to read the stopwatch hands>
The time measured is indicated by the four stopwatch hands below.
STOPWATCH second hand
STOPWATCH minute hand
STOPWATCH 1/100-second hand STOPWATCH 1/10-second hand

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* Measurement and release of split time can be repeated by pressing Button B.
* If the time measured reaches 120 minutes while the split time is being
displayed, the stopwatch automatically stops counting and releases the split
time display, showing “40' 00" 00.” Before starting the next measurement,
make sure to reset the stopwatch by pressing Button B.
Accumulated elapsed time measurement
A
START
A
STOP RESTART
▼
▼
A
STOP RESET
B
▼
A
○○○○
▼
* Restart and stop of the stopwatch can be repeated by pressing Button A.
Split time measurement
A
START SPLIT
▼
▼
A
STOP RESET
B
▼
○○○○
▼
BB
SPLIT
RELEASE
Measurement of two competitors
A
START
▼
▼
B
RESET
B
▼
▼
BA
FINISH TIME
OF 1ST
COMPETITOR
2ND COMPETITOR
FINISHES
FINISH TIME
OF 2ND
COMPETITOR
<How to reset the stopwatch>
While the STOPWATCH hands are moving
1. Press Button A to stop the stopwatch.
2. Press Button B to reset the stopwatch.
While the STOPWATCH hands are stopped
(When the stopwatch is stopped)
1. Press Button B to reset the stopwatch.
(When the split time measurement is displayed while the stopwatch is measuring.)
1. Press Button B to release the split time display and return to the normal display
2. Press Button A to stop the stopwatch
3. Press Button B to reset the stopwatch
(When the split time measurement is displayed and the stopwatch is stopped.)
1. Press Button B to release the split time display.
2. Press Button B to reset the stopwatch.
Standard measurement
A A B
▼
▼
START STOP RESET

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TACHYMETER
(for models with tachymeter scale on the dial)
●Tachymeter scale can be used only when the time required is less than 60
seconds.
To measure the hourly average speed of a vehicle
Use the stopwatch to determine
how many seconds it takes to go
1 km or 1 mile.
Tachymeter scale indicated by
STOPWATCH second hand gives
the average speed per hour.
Ex. 1
STOPWATCH
second hand:
40 seconds
Tachymeter scale:
“90”
“90” (tachymeter scale figure) x 1 (km or mile)
= 90 km/h or mph
Ex. 2: If the measuring distance is extended to 2 km or miles or shortened to
0.5 km or miles and STOPWATCH second hand indicates “90” on
tachymeter scale:
“90” (tachymeter scale figure) x 2 (km or mile) = 180 km/h or mph
“90” (tachymeter scale figure) x 0.5 (km or mile) = 45 km/h or mph
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DEMONSTRATION FUNCTON OF THE STOP-
WATCH HAND MOVEMENT
• The demonstration function allows you to view the movement of the four
STOPWATCH hands.
• Each of the four STOPWATCH hands demonstrates high-speed movements and
when the demonstration is finished, they return to the original position.
* After approximately 3 seconds, the demonstration finishes, and the stopwatch is
reset for the next use.
* If either Button A or B is pressed during a demonstration, the demonstration will be
stopped and the stopwatch will be reset.
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●How to view the demonstration
1. Reset the stopwatch.
* Refer to "HOW TO USE THE STOPWATCH"
section of this manual.
2. Press Button B for 2 seconds or longer.
B

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CAUTION
The telemeter provides only a rough indication of the distance to the place where
lightning struck, and therefore, the indication cannot be used as the guideline to avoid
the danger of lightning. It should also be noted that the speed of the sound differs
depending on the temperature of the atmosphere where it travels.
TELEMETER
(for models with telemeter scale on the dial)
●The telemeter can provide a rough indication of the distance to the source of light
and sound.
●The telemeter indicates the distance from your location to an object that emits
both light and sound. For example, it can indicate the distance to the place where
lightning struck by measuring the time elapsed after you see a flash of lightning
until you hear the sound.
●A flash of lightning reaches you almost immediately while the sound travels to
you at a speed of 0.33 km/second. The distance to the source of the light and
sound can be calculated on the basis of this difference.
●The telemeter scale is so graduated that the sound travels at a speed of 1 km in
3 seconds.*
* Under the condition of temperature of 20 ºC (68 ºF).
To measure the hourly rate of operation
Use the stopwatch to measure
the time required to complete 1
job.
Tachymeter scale indicated by
STOPWATCH second hand gives
the average number of jobs ac-
complished per hour.
Ex. 1
STOPWATCH
second hand:
20 seconds
Tachymeter scale:
“180”
“180” (tachymeter scale figure) x 1 job
= 180 jobs/hour
Ex. 2: If 15 jobs are completed in 20 seconds:
“180” (tachymeter scale figure) x 15 jobs = 2700 jobs/hour
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