Citizen B740 User Manual

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When reading this instruction manual please keep the watch diagram at
left folded out and in view.
• Refer to “3. NAME OF PARTS” (p.18) for the symbols on the diagram.
• The design may differ according to the model.
Pendant la lecture de ce mode d'emploi, dépliez le dessin de la montre à
gauche de manière à pouvoir vous y référer.
• Pour les symboles du dessin de la montre, reportez-vous à “3. NOMEN-
CLATURE DES ORGANES” (p. 83).
• Le design de la montre peut varier selon le modèle.
Cuando lea este manual de instrucciones por favor tenga el esquema del
reloj de la izquierda desplegado y a la vista.
• Diríjase a “3. DENOMINACION DE LAS PARTES” (pág. 156) para los
símbolos que aparecen en el esquema.
• El diseño puede variar según el modelo.
Beim Lesen dieser Bedienungsanleitung beziehen Sie sich bitte auf die
Abbildung im linken Faltblatt.
• Für die in der Abbildung verwendeten Symbole sich auf das Kapitel “3.
BEZEICHNUNG DER TEILE” (S. 226) beziehen.
• Das Design kann je nach Modell verschieden sein.
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Citizen B740 Specifications

General

Brand	Citizen
Model	B740
Category	Watch
Movement	Quartz
Caliber	Eco-Drive
Case Material	Stainless Steel
Water Resistance	100 meters
Band Material	Stainless Steel
Case Diameter	42 mm
Case Thickness	11 mm
Crystal	Mineral
Dial Color	Black
Calendar	Date

Summary

1. BEFORE USING

How to use this watch properly

Recommendations for proper usage to ensure optimal performance and battery life.

2. BEFORE USING FOR DIVING

CAUTION Before using this watch for diving

User training, understanding of operation, and precautions for safe diving.

WARNING Regarding the depth meter function

Depth meter is auxiliary; use as a guideline, not an official gauge.

CAUTION For safe diving

Emphasizes buddy system, safe depth limits, and full battery charge before diving.

3. NAMES OF PARTS

Component Descriptions

Detailed explanations of each labeled part of the watch and its function.

4. WARNING FUNCTIONS OF THIS SOLAR POWERED WATCH

Warning Indications Overview

Overview of how the watch indicates low battery and potential issues.

Charge level indication

Explains battery charge levels (LV.1, LV.2, NG) and their implications for diving.

Insufficient charge warning function

Watch shifts to Time mode with 2-second interval movement when battery is low.

Stop and Time reset warning functions

Explains watch stoppage and time reset indicators due to battery depletion.

Overcharge prevention function

Describes the watch's protection against overcharging the secondary battery.

5. TIME REQUIRED FOR CHARGING

Charging time guidelines

Table showing time needed for charging based on illuminance and environment.

6. SPECIAL CARE FOR THIS SOLAR POWERED WATCH

Battery charging precautions

Advice on charging the battery, avoiding heat, and general care.

Secondary battery handling and usage

Warnings about battery removal, safety, and using only specified batteries.

7. SWITCHING BETWEEN MODES

Automatic mode transitions

How the watch automatically switches between Time, Chronograph, and Diving modes.

8. ADJUSTING TIME AND DATE (Time mode)

Adjusting time and date

Step-by-step guides for setting the correct time and date using the crown.

9. DIVING MODE

Diving mode standby status

Details on the watch's state when ready for diving, including hand positions.

Depth indication and reading

How depth is measured, displayed, and read in the diving mode.

Canceling the Diving mode

Procedures to exit the diving mode and return to time mode.

10. CHRONOGRAPH MODE

Recalling memorized maximum depth

How to retrieve the deepest point recorded during the last dive.

Chronograph indication and reset

How to view and reset the chronograph's measured time.

Measuring and stopping time

Steps to start, stop, and measure elapsed time using the chronograph.

11. MEASURES AGAINST POSSIBLE PROBLEMS

Hand position and indication errors

Troubleshooting for misaligned hands and incorrect indications.

Mode switching and sensor issues

Resolving problems with mode transitions and sensor-related errors.

12. SETTING FUNCTION HAND AT “0” POSITION

Automatic time correction function

How the watch automatically corrects time after hand adjustment.

13. ALL RESET/ADJUSTING HAND POSITION

Full reset and hand adjustment

Comprehensive steps to reset all functions and adjust all hands.

14. NOTE ON SECONDARY BATTERY

15. OTHER FUNCTIONS

Rotating bezel usage

How to use the rotating bezel to track elapsed time during diving.

No decompression limits

Table and explanation of limits for divers to avoid decompression stops.

16. PROPER CARE FOR LONG TERM USE

Water-resistance and maintenance

Information on water resistance, servicing, and replacement of parts.

Watch repair and luminous dial care

Guidance on authorized service, repairs, and luminous paint maintenance.

Cleaning and operating environment

Instructions for cleaning the watch and precautions for operating environments.

17. SPECIFICATIONS