Seiko 7T82 - User Manual

Questions and Answers

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Amber GonzalezJul 30, 2025
Why does my Seiko 7T82 Watch temporarily gain or lose time?
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  thorntontammyJul 31, 2025
  Your Seiko Watch may temporarily gain or lose time if it has been exposed to extremely high or low temperatures. If this occurs, return the watch to a normal temperature and reset the time. Also, the watch may gain or lose time if it has been left close to an object with a strong magnetic field. To correct this, move the watch away from the magnetic source and reset the time. If resetting the time doesn't restore normal accuracy, contact the retailer.
D
David RossAug 6, 2025
What to do if my Seiko 7T82 stops operating?
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  Duane KelleyAug 6, 2025
  If your Seiko Watch stops operating, the battery has likely run down. Have the battery replaced with a new one immediately by the retailer from whom the watch was purchased.
M
melissa13Aug 12, 2025
What to do if the small second hand on my Seiko Watch moves at two-second intervals?
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  Timothy FischerAug 12, 2025
  If the small second hand on your Seiko Watch moves at two-second intervals, the battery is likely nearing its end. Have the battery replaced with a new one immediately by the retailer from whom the watch was purchased.
J
Jose FisherAug 17, 2025
Why does the date change at 12 o’clock noon on my Seiko 7T82 Watch?
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  edwardkeithAug 18, 2025
  If the date on your Seiko Watch changes at 12 o’clock noon, the AM/PM setting is not properly set. To correct this, advance the hour hands for 12 hours to correctly set the time and date.
J
Jennifer ParkAug 25, 2025
What to do if the STOPWATCH hands do not return to the “0” position when the stopwatch is reset on my Seiko 7T82 Watch?
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  Jared WilliamsAug 25, 2025
  If the STOPWATCH hands on your Seiko Watch do not return to the “0” position when the stopwatch is reset, it may be because the watch has been affected by magnetism or exposed to strong shocks or vibrations. Reset the stopwatch hands to the “0” position, following the procedure in "TIME AND CALENDAR SETTING AND STOPWATCH HAND POSITION ADJUSTMENT." If moisture has entered the watch because the gasket has deteriorated, contact the retailer from whom the watch was purchased.

Summary

SEIKO Cal. 7 T82 Features

Time and Calendar Display

Details the hour, minute, and small second hands for basic timekeeping.

Stopwatch Functions Overview

Covers 40-minute retrograde dial, 1/100-sec increments, and 120-min measurement.

Screw Down Crown Operation

Time, Calendar, and Stopwatch Hand Setting

Setting Time and Calendar

Procedure for adjusting the watch's time, date, and handling month differences.

Adjusting Stopwatch Hand Positions

Instructions for resetting all stopwatch hands to their correct zero positions.

How to Use the Stopwatch

Reading Stopwatch Hands

Guidance on interpreting the 1/100, 1/10, second, and minute stopwatch hands.

Stopwatch Measurement Modes

Details on accumulated elapsed, split time, and two-competitor measurement modes.

Stopwatch Hand Movement Demonstration

Tachymeter Scale Usage

Telemeter Functionality

How to Use the Telemeter

Instructions for estimating distance to sound/light sources using the telemeter.

Battery Change and Indicators

Battery Life Indicator

How to identify low battery status via the small second hand's movement.

Procedure After Battery Replacement

Resetting the Watch IC

Steps to reset the built-in IC after battery replacement for normal operation.

Troubleshooting Common Watch Issues

Watch Specifications

Seiko 7T82 Specifications

Operating Environment

operational temperature range	–10 ºC ~ +60 ºC
loss/gain (monthly rate)	± 15 seconds at normal temperature range (5 ºC ~ 35 ºC)
frequency of crystal oscillator	32, 768 Hz

Power

battery type	SEIKO SR927W, 1 piece
battery life	Approximately 3 years
driving system	Step motor, 4 pieces

Display

time/calendar display	Hour, minute and small second hands
date display	Displayed in numerals
stopwatch display	1/100-second hand (0.1 second/ 360 degrees), 1/10-second hand (1 second/ 360 degrees), second hand (60 seconds/ 360 degrees), minute hand (40 minutes/ 240 degrees)

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