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eta 251.252 User Manual

eta 251.252
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COMMUNICATION
TECHNIQUE
TECHNISCHE
MITTEILUNG
TECHNICAL
COMMUNICATION
ETA 251.252 / 251.262 / 251.272
13
1
/4
´´´
Français / Deutsch / English - 10.12.2003 / STAR / 03
251.252 251.262 251.272
13
1
/4
´´´
ø 30,00 mm
5,00 mm
5,00 mm
251.252
251.262
4,60 mm
251.272
Hauteur sur mouvement
Höhe auf Uhrwerk
Height on movement
ETA SA Manufacture Horlogère Suisse
Customer Service
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eta 251.252 Specifications

General IconGeneral
Brandeta
Model251.252
CategoryWatch
LanguageEnglish

Summary

Technical Overview and Specifications

Movement Dimensions and Height

Key dimensions including diameter and height on movement.

Movement Technical Communication

Communication sections for technical details in multiple languages.

Interchangeability and Parts List

List of Components (Fournitures)

Detailed list of all watch movement parts and their reference numbers.

Interchangeability Matrix

Cross-reference table showing part interchangeability across calibers.

Interchangeability and Parts List

Identical Parts Cross-Reference

Listing of parts that are identical across different models.

Component Visuals and Materials

Caliber 251.252 Components

Visual representation of components for caliber 251.252.

Caliber 251.252/262 Components

Visual representation of components for calibers 251.252 and 251.262.

Caliber 251.252/272 Components

Visual representation of components for calibers 251.252 and 251.272.

Component Visuals and Materials

Caliber 251.262/272 Components

Visual representation of components for calibers 251.262 and 251.272.

Caliber 251.272 Components

Visual representation of components for caliber 251.272.

Caliber 251.252/262/272 Components

Visual representation of components for calibers 251.252, 251.262, and 251.272.

Display Assembly Procedure

Parts for Display Assembly

List of parts and their assembly order for the watch display.

Calendar Mechanism Assembly

Parts for Calendar Mechanism

List of parts and their assembly order for the calendar mechanism.

Calendar Mechanism Lubrication

Recommended lubrication for the calendar mechanism parts.

Handsetting and Electronic Module Assembly

Parts for Handsetting/Electronic Module

List of parts and their assembly order for handsetting and electronic module.

Handsetting/Electronic Module Lubrication

Recommended lubrication for handsetting and electronic module.

Handsetting and Electronic Module Assembly

Parts for Handsetting/Electronic Module

List of parts and their assembly order for handsetting and electronic module.

Handsetting/Electronic Module Lubrication

Recommended lubrication for handsetting and electronic module.

Electronic Module and Motor Assembly

Parts for Electronic Module and Motors

List of parts and their assembly order for electronic module and motors.

Electronic Module/Motor Lubrication

Recommended lubrication for electronic module and motor assembly.

Electronic Module and Motor Assembly

Parts for Electronic Module and Motors

List of parts and their assembly order for electronic module and motors.

Electronic Module/Motor Lubrication

Recommended lubrication for electronic module and motor assembly.

Chronograph Part Assembly

Parts for Chronograph Assembly

List of parts and their assembly order for the chronograph function.

Chronograph Lubrication

Recommended lubrication for chronograph assembly parts.

Counter Wheels Details

12-Hour Counter

Details and diagram for the 12-hour counter wheel.

1/100 Second Counter

Details and diagram for the 1/100 second counter wheel.

Main Watch Hands and Small Second

Details and diagram for central hands and small second.

60 Seconds Counter

Details and diagram for the 60-second counter wheel.

30 Minutes Counter

Details and diagram for the 30-minute counter wheel.

Chronograph Part Assembly

Parts for Chronograph Assembly

List of parts and their assembly order for the chronograph function.

Chronograph Lubrication

Recommended lubrication for chronograph assembly parts.

Counter Wheels Details

1/10 Second Counter

Details and diagram for the 1/10 second counter wheel.

60 Minutes Counter

Details and diagram for the 60-minute counter wheel.

Main Watch Hands and Small Second

Details and diagram for central hands and small second.

60 Seconds Counter

Details and diagram for the 60-second counter wheel.

12 Hours Counter

Details and diagram for the 12-hour counter wheel.

Chronograph Part Assembly

Parts for Chronograph Assembly

List of parts and their assembly order for the chronograph function.

Chronograph Lubrication

Recommended lubrication for chronograph assembly parts.

Counter Wheels Details

1/10 Second Counter

Details and diagram for the 1/10 second counter wheel.

60 Seconds Counter

Details and diagram for the 60-second counter wheel.

Main Watch Hands and Small Second

Details and diagram for central hands and small second.

30 Minutes Counter

Details and diagram for the 30-minute counter wheel.

Counting Wheels Interchangeability

Small Counting Wheels Interchangeability

Interchangeability chart for small counting wheels by part number.

Centre Wheels Interchangeability

Interchangeability chart for centre wheels by part number.

Electrical Tests Overview

Test 1: Battery Voltage

Procedure for measuring battery voltage.

Test 2: Coil Pulses

Procedure for measuring coil pulses.

Test 3: Working Voltage Limit

Procedure for checking the working voltage limit.

Test 4: Coil Continuity

Procedure for checking coil continuity.

Electrical Tests Overview

Test 1: Battery Voltage

Procedure for measuring battery voltage.

Test 2: Coil Pulses

Procedure for measuring coil pulses.

Test 3: Working Voltage Limit

Procedure for checking the working voltage limit.

Test 4: Coil Continuity

Procedure for checking coil continuity.

Electrical Test Procedures and Remarks

Battery Voltage Measurement Procedure

Detailed procedure and remarks for battery voltage testing.

Coil Pulse Measurement Procedure

Detailed procedure and remarks for coil pulse testing.

Working Voltage Limit Procedure

Detailed procedure and remarks for working voltage limit testing.

Coil Continuity Check Procedure

Detailed procedure and remarks for coil continuity testing.

Chronograph Hand Setting

Zeroing Chronograph Counters

Instructions for resetting chronograph counters to zero.

Time, Date, and Month Correction

Procedures for setting time, date, and month.

Chronograph Settings and Corrections (Cal. 251.262)

Chronograph Hand Initialization

Setting chronograph hands to zero or real time.

Time and Date Correction

Procedures for time and date adjustment.

Chronograph Settings and Corrections (Cal. 251.272)

Chronograph Hand Initialization

Setting chronograph hands to zero or real time.

Time and Date Correction

Procedures for time and date adjustment.

Hand Fitting Heights and Dimensions

Hand Fitting Height Measurements

Detailed measurements for hand fitting heights of various components.

Hand Fitting Force and Inertia Data

Data on force and inertia for hand fitting components.

Hand Fitting Heights and Dimensions (Cal. 251.262)

Hand Fitting Height Measurements

Detailed measurements for hand fitting heights of various components.

Hand Fitting Force and Inertia Data

Data on force and inertia for hand fitting components.

Indications for Hands (Cal. 251.272/281/283/285)

Hand Fitting Height Data

Measurements of hand fitting heights and dimensions for components.

Hand Fitting Force and Balance Data

Data on hand fitting force, balance, and critical dimensions.

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