Seiko 7T82 Specifications download pdf (Page 19)

●

How to use the tachymeter（For the models with a tachymeter scale on the dial）

○The tachymeter can be used to measure the hourly average speed of a vehicle

and the hourly rate of operation.

①Use the stopwatch to determine how

many seconds it takes to go one

kilometer.

②Read the tachymeter scale where the

second hand points.

80km/h

To measure the hourly average speed of a vehicle

①Use the stopwatch to measure the

time required to complete one

product.

②Read the tachymeter where the

second hand points.

200 products/hour

To measure the hourly rate of operation

1km

START STOP START STOP

One product

※Resetting the IC will initialize the watch. Before starting to use the watch, it will be

necessary to set the time and adjust the STOPWATCH hands to the "0" position.

Refer to "Setting the time and adjusting the stopwatch hand position" section of

this manual.

Button B

Button A

CROWN

After the battery is replaced with a new one, or when an abnormal display appears,

follow the procedures below to reset the built-in IC. The watch will resume its normal

operation.

1. Pull out the crown to the second click.

2. Press Button A and B at the same time

for 3 seconds or longer.

3. Push the crown back in to the normal

position and check if the hands move as

normal.

Necessary procedure after battery change

※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.

・

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.

● 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.

Demonstration function of the STOPWATCH hand movement

ButtonB

Specifications

1. Frequency of crystal oscillator--------

2. Loss/gain (monthly rate)--------------

3. Operational temperature range-------

4. Driving system--------------------------

5. Display system

Time/calendar-----------------------

Stopwatch---------------------------

6. Battery----------------------------------

7. Battery life------------------------------

8. Battery life indicator

9. IC (Integrated Circuit)------------------

32,768 Hz

± 15 seconds at normal temperature range (5℃∼35℃)

−10℃∼＋60℃

step motor, 4 pieces

Hour, minute and small second hands

Date is displayed in numerals.

STOPWATCH 1/100-second hand (0.1 second/360 degree)

STOPWATCH 1/10-second hand (1 second/360 degrees)

STOPWATCH second hand (60 seconds/360 degrees)

STOPWATCH minute hand (40 minutes/240 degrees)

Miniature silver oxide battery SB-BP 1 piece

Approximately 3 years

If the stopwatch is used for longer than 2

hours a day, the battery life may be shorter

than the specified period.

C-MOS-IC, 1 piece

※The specifications are subject to change without prior notice for product improvements.

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Seiko 7T82 Specifications Page 19

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