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Seiko 7T84 User Manual

Seiko 7T84
21 pages
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Cal. 7T84
INSTRUCTIONS (P. 3)
BEDIENUNGSANLEITUNG (S. 41)
INSTRUCTIONS (P. 79)
ISTRUZIONI (P. 117)
INSTRUCCIONES (P. 155)
INSTRUÇÕES (P. 193)
(231 )

Questions and Answers:

Seiko 7T84 Specifications

Frequency and Timing IconFrequency and Timing
frequency of crystal oscillator32, 768 Hz
loss/gain (monthly rate)Less than 15 seconds
operational temperature range–10 ºC to +60 ºC
Display System IconDisplay System
time displayHour, minute, and small second hands
yacht timer/timer displayCenter hand: 1-minute and 1-second increments
stopwatch displayCenter hand: 1/5-second increments
Power and Battery IconPower and Battery
battery typeSEIKO SR927W
battery lifeApproximately 3 years
driving systemStep motor 4 pieces

Summary

Features Overview

Yacht Timer Mode

Combines count down timer and stopwatch for yacht racing.

Stopwatch Mode

Stopwatch measures up to 12 hours in 1/5-second increments.

Alarm Mode

Single-time or regular alarm functions available.

Local Time Mode

Displays time in another time zone for dual display.

Display and Buttons

Screw Lock Type Crown

Crown with Driving Wheel

Mode Change

Time Mode

How to Set the Time

Procedure for setting the main and small watch hands to the correct time.

How to Set the Date

Yacht Timer Mode

Yacht Timer Operation

Details on using the 5-, 6-, and 10-minute yacht timer modes.

How to Use the Yacht Timer

Step-by-step guide to operating the yacht timer function.

How to Read the Yacht Timer Measurement

Automatic Relay Function of the Stopwatch

How to Reset the Yacht Timer

Instructions for resetting the yacht timer function.

Yacht Timer-Stopwatch Operational Flow

Standard Measurement Following Yacht Timer

Flow for standard measurement after yacht timer finishes.

Accumulated Elapsed Time Measurement Following Yacht Timer

Flow for accumulated elapsed time measurement.

Split Time Measurement Following Yacht Timer

Flow for split time measurement after yacht timer.

Measurement of Two Competing Yachts

Flow for measuring two competing yachts.

Restart Setting Function

Timer Mode

Stopwatch Mode

Alarm Mode

Single-Time Alarm

Sounds once at a designated alarm time, set within 12 hours.

Regular Alarm

Sounds daily at a designated time, set on a 12-hour basis.

Local Time Mode

How to Set the Local Time

Procedure to set the small watch for dual time display.

Battery Change

Battery Life Indicator

Indicator for low battery, showing second hand movement.

Necessary Procedure After Battery Change

How to Reset the IC

Procedure to reset the built-in IC after battery replacement.

Hand Position Adjustment

How to Adjust Hand Positions

Adjusting hand positions for stopwatch, timer or after IC reset.

Troubleshooting

Specifications

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