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Citizen 3740 User Manual

Citizen 3740
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This watch is an analog (hand) display diver's watch equipped with an elec-
tronic depth meter. The familiar watch-face format is convenient to confirm
depths while diving. Further, a chronograph function finds uses in a variety of
activities besides diving. (Please note that the depth meter function should be
used only as an auxiliary instrument.)
"Highly reliable water resistant for use at depths of up to 200 meters"
The high-reliability water resistant conforms to ISO standards for diving watches.
* ISO diving watch standards are those set forth by the International Organization For
Standardization.
<ISO/6425, 15 May 1984>
All repairs of this product, including battery replacement,
should be conducted at a Citizen Service Center. For repairs
and inspections please contact the place of purchase or contact
a Citizen Service Center directly.
3
Two models of this watch are available:one with depth readings indicated in
meters (m), the other with readings indicated in feet (ft).

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Citizen 3740 Specifications

General IconGeneral
BrandCitizen
Model3740
CategoryWatch
MovementQuartz
Display TypeAnalog
Case MaterialStainless Steel
CrystalMineral
FeaturesDate Display

Summary

Diving with this watch

Safe Diving Procedures

Guidance on safe diving practices and watch usage.

Safety Warnings and Precautions

When Not to Use Depth Meter

Conditions where the depth meter may not function accurately or safely.

When to Stop Use While Diving

Indicators that signal the watch should be stopped during diving.

Operating Instructions

Watch Parts Identification

Identifies the names and functions of various watch parts.

Switching Between Watch Modes

Instructions on how to switch between Time, Diving, and Chronograph modes.

Time Mode Operations

Setting Time and Date

Procedure to set the watch's time and date accurately.

Crown Manipulation Precautions

Safety and operational notes regarding the watch crown.

Diving Mode Functions

Maximum Depth Memo Function

How the watch records and displays the deepest point reached during a dive.

Depth Reading and Range

Details on how depth is measured, displayed, and its limits.

Auto Return and Malfunction Prevention

Automatic mode switching and protection against depth meter errors.

Diving Preparation and Care

Depth Reading Accuracy and Conditions

Tips for accuracy, and considerations for high altitude/freshwater.

Pre-Dive Checks and Post-Dive Care

Essential checks before diving and instructions for after diving.

Chronograph Mode Operations

Chronograph Measurement Guide

Step-by-step guide on how to use the chronograph functions.

Chronograph Display Overview

Explanation of the hands and indicators in the chronograph display.

Alerts and Battery Information

Low Battery Warning Indicator

Indicates a low battery warning and its implications.

Battery Life and Replacement

Information regarding battery life, original battery, and replacement procedures.

Hand Position Adjustment

ALL RESET Procedure

Procedure to reset all hands to their correct default positions.

Hand Position Correction

Adjusting Function Hand Position

Steps to correct the function hand's position when it is incorrect.

Automatic Time Adjustment Function

How the watch automatically adjusts time after hand position correction.

Advanced Watch Features

Using the Register Ring

How to use the register ring to measure elapsed time.

No Decompression Limits

Information on dive decompression limits based on depth and time.

Care for Long Term Use

Water Resistance and Pressure Sensor Care

Details on water resistance, usage, and pressure sensor maintenance.

Watch Band, Temperature, Shock, and Magnetism

Care for band, temperature/shock limits, and magnetic field resistance.

Watch Protection and Cleaning

Static Electricity and Chemicals

Precautions against static electricity and chemical exposure.

Luminous Display and Safekeeping

Info on luminous paint and recommendations for watch storage.

Keeping Your Watch Clean

Instructions for cleaning the watch and its band.

Watch Specifications

Model, Display, and Temperature Range

Details on watch model, display type, and operational temperature limits.

Accuracy and Measurement Specifications

Information on time and depth measurement accuracy and ranges.

Additional Functions and Battery Details

Overview of extra functions, IC, battery, and battery life.

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