Seiko 7T92 User manual

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Do not attempt to dive using this watch unless you have been properly
trained in diving. For your safety, please abide by the rules of diving.
Do not use the watch for saturation diving using helium gas.
Before diving, make sure that the watch operates normally.
WARNING
Please read and observe the instructions described in this booklet to ensure
the proper functioning of your diver's watch.
Do not operate the crown when the watch is wet or in water.
Do not operate the buttons when the watch is wet or in water.
Avoid hitting the watch against hard objects such as rocks.
CAUTION
ENGLISH

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PRECAUTIONS ON USING THE WATCH FOR DIVING
Before diving, make sure that the watch operates normally and be sure to observe the
precautions described below.
BEFORE DIVING
Do not use the watch for saturation diving using helium gas.
To measure the elasped time while you are underwater, always use the rotating bezel.
Check that:
• the second hand is moving at one-second intervals.
• the “•” mark on the case back indicates the expected life limit of the battery. (See “BATTERY
CHANGE” on page 22.)
• the crown is locked tightly in place.
• the buttons are locked tightly in place.
• there are no visible cracks in the crystal or the watch band.
• the strap or bracelet is securely fastened to the watch case.
• the buckle keeps the strap or bracelet firmly secured to the wrist.
• the rotating bezel turns counterclockwise smoothly (the rotation must not be too loose or too tight)
and the “ ” mark aligns with the minute hand.
• the time and calendar are appropriately set.
If there are any malfunctions, we recommend that you contact an AUTHORIZED SEIKO SERVICE
CENTER.
WHILE DIVING
Do not operate the crown and the buttons when the watch is wet or in water.
Take care not to hit the watch against hard objects such as rocks.
Bezel rotation may become slightly stiffer underwater. This is not a malfunction.
AFTER DIVING
Rinse the watch in fresh water after diving and wash out all seawater, soil, sand, etc.
Wipe the watch thoroughly dry to prevent possible rust on the case after cleaning the watch in fresh water.
WARNING
CAUTION
WARNING notes indicate any condition or practice which, if not strictly observed,
could result in severe personal injury or possible death.
CAUTION notes indicate any condition or practice which, if not strictly observed,
may result in personal injury or property damage.

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CAL. 7T92
A
B
a b c
CROWN
Hour hand
Minute hand
STOPWATCH 1/20-second hand
TIME/CALENDAR
STOPWATCH
Measures up to 12 hours in 1/20 second increments.
Split time measurement is possible.
Small second hand
Date
a: Normal position
b: First click
c: Second click
STOPWATCH hour hand STOPWATCH second hand
STOPWATCH minute hand
CONTENTS
Page
SETTING THE TIME AND ADJUSTING THE STOPWATCH HAND POSITION ........ 8
SETTING THE DATE ................................................................................................ 11
STOPWATCH ........................................................................................................... 12
TACHYMETER ......................................................................................................... 15
TELEMETER ............................................................................................................ 17
ROTATING BEZEL ................................................................................................... 19
SCREW DOWN CROWN ......................................................................................... 20
SECURITY LOCK BUTTON OPERATION ................................................................. 21
BATTERY CHANGE .................................................................................................. 22
TO PRESERVE THE QUALITY OF YOUR WATCH ................................................... 24
SPECIFICATIONS ..................................................................................................... 27
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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1. When the stopwatch is measuring or has been measuring and is now stopped, pulling the crown out
to the second click will automatically reset the stopwatch hands to “0”.
2. If is recommended that the hands be set to the time a few minutes ahead of the current time, taking
into consideration the time required to adjust the STOPWATCH hand position if necessary.
3. When setting the hour hand, be sure to check that AM/PM is correctly set. The watch is so designed
that the date changes once in 24 hours.
4. When setting the minute hand, first advance it 4 to 5 minutes ahead of the desired time and then turn
it back to the exact minute.
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
STOPWATCH second hand
STOPWATCH hour hand
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STOPWATCH 1/20-second hand
A
STOPWATCH minute hand
SETTING THE TIME AND
ADJUSTING THE STOPWATCH HAND POSITION
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Minute hand
Hour hand
CROWN Pull out to second click when the second hand is at the 12 o’clock position.
CROWN Turn to set the hour and
minute hands.
Small
second
hand
1. TIME SETTING
This watch is so designed that the following are all 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 check and adjust the time. If
needed, the position of the stopwatch hands should also be adjusted then.

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Before setting the date, be sure to set the main time.
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CROWN
Date
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.
SETTING THE DATE
Press for 2 seconds to select the stopwatch hand(s) to be adjusted.
STOPWATCH
second hand
CROWN
Selection of the hand(s) can be made in the following order by
pressing button for 2 seconds.
A
STOPWATCH
1/20-second hand
STOPWATCH
hour and minute
hands
* The selected hand(s) turn(s) a full circule.
Press repeatedly to set the selected stopwatch hand(s) to the “0” position.
* The hand(s) move(s) quickly if button B is kept pressed.
* After all the adjustments are completed, check that the hour and minute hands for time
display indicate the current time.
B
A
Push back into normal position in accordance with a time signal.
Unscrew the crown and pull out to first
click position.
Turn clockwise until the desired date
appears.
Screw the crown all the way in until it is
locked.

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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.
Standard measurement
A A B
START STOP RESET
After the stopwatch is restarted or split time is released, the stopwatch 1/20-second
hand moves for about 10 minutes and stops automatically.
In the same manner, if the stopwatch is stopped and restarted repeatedly or split time
is measured and released repeatedly, the stopwatch 1/20-second hand moves for
about 10 minutes and stops automatically.
Before using the stopwatch, be sure to check that the crown is set at the normal position and
that the stopwatch hands are reset to the “0” position.
* If the stopwatch hands do not return to the “0” position when the stopwatch is reset to “0”, follow the
procedure in “SETTING THE TIME AND ADJUSTING THE STOPWATCH HAND POSITION”.
STOPWATCH
The stopwatch can measure up to 12 hours in 1/20-second increments.
When the measurement reaches 12 hours, the stopwatch automatically stops counting.
A
B
STOPWATCH second hand
STOPWATCH minute hand
[ Ex.: 2 hours, 30 minutes and 10.85 seconds ]
Movement of the stopwatch 1/20-second hand
After the stopwatch is started, the stopwatch 1/20-second hand moves for about 10
minutes and automatically stops at the “0” position.
When the measurement is stopped or split time is measured, it moves to indicate the
elapsed 1/20 seconds.
STOPWATCH 1/20-second hand
STOPWATCH hour hand

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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.
1
Tachymeter scale indicated by
the stopwatch second hand gives
the average speed per hour.
2
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 the 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
Split time measurement
A
START SPLIT
A
STOP RESET
B
○○○○
BB
* Measurement and release of split time can be repeated by pressing button B.
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

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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 ° C(68 ° F).
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.
To measure the hourly rate of operation
Use the stopwatch to measure
the time required to complete 1
job.
1
Tachymeter scale indicated by
the stopwatch second hand gives
the average number of jobs ac-
complished per hour.
2
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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HOW TO USE THE TELEMETER
Before beginning, check that the stopwatch has been reset.
START
(Flash of light)
STOP
(Crash of thunder)
Press button A to start the
stopwatch as soon as you
see the light.
When you hear the sound,
press button A to stop the
stopwatch.
Read the telemeter scale
that the stopwatch second
hand points to.
Approx. 3 km
Please note that the stopwatch second hand moves in 1 second increments and does not always
point exactly to the graduations of the telemeter scale. The telemeter scale can be used only
when the measured time is less than 60 seconds.
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ROTATING BEZEL
The rotating bezel can show the elapsed time up to 60 minutes. By setting it before
diving, you can know how many minutes you are underwater.
Start(10:10 AM)
“ ” mark
30 minutes have elapsed.
"30" on rotating bezel
1. Turn the rotating bezel to align its “ ” mark with the minute hand.
* The rotating bezel rotates with clicks. With each click, it turns half a minute.
2. To know the elapsed time, read the number on the rotating bezel that the minute
hand points to.
To prevent accidental rotation, the rotating bezel is so designed that rotation
becomes harder in water. Also for safty's sake, it roatates only counterclockwise,
so that the time measured is never shorter than the actual elapsed time.
Minute hand
Example:
Bezel rotation may become slightly stiffer underwater. This is not a malfunction.

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SECURITY LOCK BUTTON OPERATION
Locking the push-buttons
- Turn Security Lock Buttons clockwise until you no longer feel the threads turning.
- The buttons cannot be pushed in.
Unlocking the push-buttons
- Turn Security Lock Buttons counterclockwise until you no longer feel the threads turning.
- The buttons can be pushed in.
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Locking
Unlocking
Locking
A
B
SECURITY LOCK OF PUSH-BUTTONS A & B
Unlocking
1. Before diving, make sure that both buttons are locked tightly in place.
2. Do not operate the buttons when the watch is wet or in water.
SCREW DOWN CROWN
• Your watch has 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.
<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.
1. Before diving, make sure that the crown is locked tightly in place.
2. Do not operate the crown when the watch is wet or in water.
3. When screwing the crown in, ensure that the crown is correctly aligned and turn it gently.
If it is 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.