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Manual Casio Collection B640WC-5AEF Watch

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Manual

Operation Guide 3294

E-9

3. When the setting you want to change is ﬂ ashing, press D to change it as

described below.

To change this setting Perform this button operation

Seconds

Press D to reset to 00.

Hour, Minutes, Year, Month, Day

Press D to increase the setting.

Pressing x D while the seconds are in the range of 30 to 59 resets them to 00 and

adds 1 to the minutes. In the range of 00 to 29, the minutes are unchanged.

To toggle between the 12-hour and 24-hour formats, press

x B

while some

digits are ﬂ ashing.

Press 4. A to exit the setting screen.



x The day of the week is automatically displayed in accordance with the date

(year, month, and day) settings.



x The year can be set in the range of 2000 to 2099.

E-8

Timekeeping

Use the Timekeeping Mode to set and view the current

time and date.

To set the time and date

In the Timekeeping Mode, press 1. A. The seconds digits

will start to ﬂ ash, which indicates the setting screen.

Press 2. C to move the ﬂ ashing in the sequence shown

below to select other settings.

Seconds Hour Minutes

YearMonthDay

Day of week

Month

Day

PM indicator

Hour

Minutes

Seconds

E-7

After you perform an operation in any mode, pressing x C returns to the

Timekeeping Mode.

Press

x B in any mode to illuminate the display for about two seconds.

Countdown Timer Mode Stopwatch Mode

E-6

General Guide

Press x C to change from mode to mode.

Timekeeping Mode Alarm Mode

C C

E-5E-4

E-18 Countdown Timer

E-19 To set the countdown start time

E-20 To use the countdown timer

E-21 To turn auto-repeat on and off

E-22 Stopwatch

E-23 To measure times with the stopwatch

E-24 Reference

E-25 Speciﬁ cations

E-3

Contents

E-2 About This Manual

E-6 General Guide

E-8 Timekeeping

E-8 To set the time and date

E-11 Backlight

E-11 To switch the backlight function on and off

E-13 Alarm

E-15 To set the alarm time

E-16 To stop the alarm

E-17 To switch an alarm and Hourly Time Signal on and off

E-2

About This Manual

x Depending on the model of your watch, display text

appears either as dark ﬁ gures on a light background or

light ﬁ gures on a dark background. All sample displays

in this manual are shown using dark ﬁ gures on a light

background.

Note that the product illustrations in this manual are

intended for reference only, and so the actual product

may appear somewhat different than depicted by an

illustration.

Button operations are indicated using the letters shown

in the illustration.



x Each section of this manual provides you with the

information you need to perform operations in each

mode. Further details and technical information can be

found in the “Reference” section.

E-1

ENGLISH

Congratulations upon your selection of this CASIO watch.

MA1110-EA

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Specifications

Brand	Casio
Model	Collection B640WC-5AEF
Category	Watches
File type	PDF
File size	0.15 MB

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Frequently Asked Questions about Casio Collection B640WC-5AEF Watch

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

A battery in my device is oxidized, can I still safely use it? Verified

Ja, the device can still be safely used. Firstly, remove the oxidizd battery. Never use bare hands to do this. Then clean the battery compartment with a cotton swab dipped in vinegar or lemon juice. Let it dry and insert new batteries.

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My mechanical watch runs fast, what can I do? Verified

This might be caused by exposure to a magnetic field. It can be solved by a demagnetisation process performed by a professional watchmaker.

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What do AM and PM stand for? Verified

AM stands for Ante Meridiem and indicates that the time is before midday. PM stands for Post Meridiem and indicates that the time is past midday.

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What is a 'Chronograph'? Verified

A 'Chronograph' is literally a 'writer of time'. The term is used to describe clocks and watches that tell the time of day as well as measure a certain period of time, like a stopwatch.

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What is GMT? Verified

GMT stands for Greenwich Mean Time (sometimes called UTC, standing for Coordinated Universal Time). It is the time for the longitude 0, that passes through Greenwich near London.

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What is a quartz movement? Verified

Watches and clocks with a quartz movement are driven by a battery. This sends an electric current through quartz crystals that will vibrate. These vibrations are passed on to the movement. Because the vibrations have a fixed frequency, watches and clocks with a quartz movement are extremely precise.

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There is moisture on the inside of the glass of my Casio watch, what should I do? Verified

Casio states that if the moisture appeared after an extreme change in temperature and disappears relatively quickly afterwards, there is probably nothing wrong. If the moisture does not disappear, you should have your watch repaired as soon as possible.

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