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Seiko Astron 8X53 User Manual

Seiko Astron 8X53
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8X53
HANDY MANUAL
Printed in Japan
  BSN 8X53-A1506
< 
English
>
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Seiko Astron 8X53 Specifications

Frequency and Accuracy IconFrequency and Accuracy
frequency of crystal oscillator32, 768 Hz
loss/gain (monthly rate)±15 seconds
Operating Environment IconOperating Environment
operational temperature range−10°C to +60°C
normal temperature range5°C to 35°C
Power IconPower
power sourcesecondary battery, 1 piece
duration of operation (without power save)approximately 6 months
duration of operation (with power save)approximately 2 years

Summary

Watch Features and Functions

GPS Signal Reception

Enables automatic local time setting worldwide via GPS signals and supports 40 time zones.

Solar Charging System

The watch utilizes solar energy for power, requiring light exposure for charging.

Automatic Time Adjustment

Watch automatically syncs time based on GPS signals and user activity patterns.

Standard Charging Time Guide

Details charging times under various light conditions for optimal battery performance.

Checking Watch Charging Status

GPS Reception Status

Indicator hand shows GPS reception capability; second hand indicates energy level.

Low Power Status

Details low charging states and energy depletion warnings indicated by the second hand.

Understanding Time Zones

Definition of Time Zones

Standard time zones based on UTC, adopted by countries and regions worldwide.

Coordinated Universal Time (UTC)

Universal standard time coordinated internationally via agreement, used as the primary time standard.

Daylight Saving Time (DST)

System to extend daylight by advancing time by one hour, adopted regionally.

Adjusting Time Zones

Automatic Time Zone Adjustment

Localizes the time zone with a single button operation, supporting DST manually.

Manual Time Zone Adjustment Procedure

Steps to adjust time zone by directing watch upward for GPS signal reception.

Time Zone Adjustment Precautions

Advises on potential issues near time zone boundaries and manual setting recommendations.

Manual Main-Dial Time Zone Setting

Manual Time Zone Selection Capability

Allows manual setting of the time zone when automatic adjustment is not possible.

Procedure for Manual Main-Dial Setting

Step-by-step guide to adjust the main-dial time zone using the crown.

Manual Sub-Dial Time Zone Setting

Sub-Dial Time Zone Adjustment Capability

Adjusts the sub-dial to reflect the time zone setting, outside of automatic adjustment.

Procedure for Sub-Dial Time Zone Setting

Guide to setting the sub-dial time zone using the crown and button B.

Main-Dial Daylight Saving Time (DST) Setting

Enabling Main-Dial DST

Manually enables Daylight Saving Time on the main-dial by advancing the hour hand.

Disabling Main-Dial DST

Manually disables Daylight Saving Time on the main-dial by returning the hour hand.

Sub-Dial Daylight Saving Time (DST) Setting

Enabling Sub-Dial DST

Manually sets Daylight Saving Time on the sub-dial, affecting the hour and minute hands.

Disabling Sub-Dial DST

Manually disables Daylight Saving Time on the sub-dial by adjusting the indicator hand.

Manual Time Adjustment Procedure

Manual Time Adjustment Overview

Sets the watch to the precise current time within the currently set time zone.

GPS-Assisted Manual Time Adjustment

Steps to manually adjust time by receiving GPS signals, involving Button A.

In-Flight Mode Operation

In-Flight Mode Functionality

Disables GPS functions to prevent interference with aircraft electronics.

Activating In-Flight Mode

Instructions on how to activate the in-flight mode using Button B.

Deactivating In-Flight Mode

Instructions on how to deactivate the in-flight mode by carrying out operation ①.

Leap Second Data and Reception

Leap Second Definition

Compensates for deviations between universal time and atomic time by adding a second.

Automatic Leap Second Reception

Automatically receives leap second data from GPS signals when additions occur.

Leap Second Data Reception Process

Details when and how leap second data is received, taking up to 18 minutes.

Reception Result Display

GPS Signal Reception Results

Displays the outcome of GPS signal reception for time or time zone adjustments.

Leap Second Data Reception Results

Indicates the success or failure of leap second data reception.

Checking Time Zone Configuration History

Caliber-Case Number Identification

Identifies the watch type and potential time zone data configuration date via the case back number.

Updating Time Zone Data for Changed Regions

Procedure to update time zone settings when official time zones change, using manual adjustments.

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