Casio Edifice EQW-A1200B-1A

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Operation Guide 5325

E-4

To start HS1 high-speed movement

While the crown is pulled out, rotate it rapidly three turns away from you (for

forward movement) or towards you (for reverse movement). High-speed

movement will continue even if you release the crown.

To start HS2 high-speed movement

While HS1 high-speed movement is progress, again rotate the crown rapidly three

turns in the same direction as the current HS1 movement (away from you for

forward movement or towards you for reverse movement).

To stop high-speed movement

Rotate the crown in the direction that is opposite that of the current high-speed

movement or press any button.

Note

 If you do not perform any operation for more than two minutes after pulling out the crown, crown

operations will become disabled automatically. If this happens, push the crown back in and then pull it

out again to re-enable crown operations.

 You can use high-speed hand movement when conﬁ guring time settings in the Timekeeping Mode,

Alarm Mode, or Countdown Timer Mode.

 Button operations become disabled after you perform a crown operation. If this happens, rotate the

crown slightly. This should restore button operations.

MA1302-EA

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ENGLISH

Congratulations upon your selection of this CASIO watch.

 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.

This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of

this, the radio-controlled atomic timekeeping function will not display the correct time for Newfoundland,

Canada.

Warning!

 The measurement functions built into this watch are not intended for taking measurements that

require professional or industrial precision. Values produced by this watch should be considered as

reasonable representations only.

 To ensure correct direction readings by this watch, be sure to perform bidirectional calibration before

using it. The watch may produce incorrect direction readings if you do not perform bidirectional

calibration. For more information, see “To perform bidirectional calibration” (page E-37).

 Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered

by you or any third party arising through the use of this product or its malfunction.

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About This Manual

Operations are performed using the watch’s crown, and the three buttons

indicated by the letters A, B and C in this manual.

Hands and Indicators

z Hour Hand

x Second Hand

c Minute Hand

v Upper Dial Hand: Indicates a time, in 24-hour format, depending on the

current mode.

b Lower Dial Hand: Indicates the current mode.

n Day Indicator

This User’s Guide uses numbers shown above to identify watch hands and

indicator.

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Using the Crown

The crown of this watch is a screw in lock crown. Before using the crown, you

must ﬁ rst rotate it towards you to loosen it.

Important!

 To maintain water resistance and avoid impact damage to the crown, be sure

to screw it back in when you are not using it.

The illustrations below show the different crown operations.

Pull out Rotate Push in

High-speed Movement

When rotating the crown to move the hands of the watch, you can use the operations described below

to move the hands at high speed, either forward or back. There are two high-speed levels: HS1 and HS2

(faster than HS1).

Crown

Loosen

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Things to check before using the watch

1. Hold down C at least two seconds to enter the Timekeeping Mode, and then observe the

movement of the x

Second Hand.

Is the x Second Hand moving smoothly at one-second intervals?

Is the x Second Hand moving at two-second

intervals or is it stopped completely?

Go to step 2.

The watch is charged. For details about

charging, see “Charging the Watch” (page E-10).

Power is low. Charge the watch by placing it in a

location where it is exposed to light. For details,

see “Charging the Watch” (page E-10).

YES

2. Check the Home City.

Use the procedure under “To conﬁ gure Home City settings” (page E-25) to conﬁ gure your Home City.

Important!

 Proper time calibration signal reception depends on correct Home City, time, and day settings in the

Timekeeping Mode. Make sure you conﬁ gure these settings correctly.

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3. Set the current time.

 To set the time using a time calibration signal

See “To get ready for a receive operation” (page E-17).

 To set the time manually

See “Conﬁ guring Current Time and Day Settings Manually” (page E-28).

The watch is now ready for use.

 For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic

Timekeeping” (page E-15).

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Contents

E-2 About This Manual

E-3 Using the Crown

E-5 Things to check before using the watch

E-10 Charging the Watch

E-11 To check the current power level

E-14 To recover from the sleep state

E-15 Radio Controlled Atomic Timekeeping

E-17 To get ready for a receive operation

E-19 To perform manual receive

E-20 To check the result of the latest receive operation

E-20 To turn auto receive on and off

E-22 Mode Reference Guide

E-23 To determine the watch’s current mode

E-23 To return to the Timekeeping Mode from any other mode

E-23 To select a mode

E-24 Timekeeping

E-25 Conﬁ guring Home City Settings

E-25 To conﬁ gure Home City settings

E-27 To switch between standard time and summer time manually

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Summary

About This Manual

Hands and Indicators

Describes the watch's hands and indicators used in manual operation.

Using the Crown

High-speed Movement

Explains how to move watch hands rapidly for setting.

Things to check before using the watch

Check the Home City.

Details the initial check of the Home City setting before watch use.

Set the current time.

Outlines the process for setting the watch's current time.

Charging the Watch

Checking the Current Power Level

Details how to check the watch's power level using the second hand.

Low Power

Describes indicators and consequences of low power levels on watch function.

Power Recovery Mode

Explains the watch's automatic mode to conserve power during low battery.

Charging Times

Provides estimated times required to charge the watch under various light conditions.

Radio Controlled Atomic Timekeeping

Power Saving

Describes the watch's sleep modes that conserve power when not in use.

To recover from the sleep state

Explains how to wake the watch from its power-saving sleep state.

Configuring Current Time and Day Settings Manually

To change the current time setting manually

Provides steps to manually set the watch's time.

To change the current day setting manually

Provides steps to manually set the watch's date.

Taking Direction Readings

Hand Indicators

Lists the specific hands used for direction readings.

To take a direction reading

Details the procedure for performing a digital compass reading.

Calibrating Direction Readings

Direction Reading Calibration Methods

Introduces methods to improve digital compass accuracy.

Bidirectional Calibration

Explains the process for calibrating the compass in two directions.

Northerly Calibration

Describes calibrating the compass to detect true north.

To perform bidirectional calibration

Step-by-step guide for bidirectional compass calibration.

Checking the Current Time in a Different Time Zone

Hands and Indicators

Lists the watch hands and indicators for World Time mode.

To view the time in another time zone

Explains how to check the time in different global cities.

Swapping your Home City and World Time City

To swap your Home City and World Time City

Describes how to interchange Home and World Time cities.

Using the Stopwatch

Hands and Indicators

Lists the watch hands and indicators for Stopwatch mode.

To perform an elapsed time operation

Details how to measure total elapsed time.

To perform lap time measurement

Explains how to measure individual lap times.

Using the Countdown Timer

Hands and Indicators

Lists the watch hands and indicators for Countdown Timer mode.

To specify the countdown start time

Guides setting the duration for the countdown timer.

To perform a countdown timer operation

Explains how to start and manage the countdown timer.

Using the Alarm

Hands and Indicators

Lists the watch hands and indicators for Alarm mode.

To change the alarm time setting

Details how to set a specific alarm time.

To turn the alarm on or off

Explains how to activate or deactivate the daily alarm.

Adjusting Home Positions

Auto Home Position Adjustment

Describes the automatic correction of hand positions.

Manual Home Position Adjustment

Outlines the manual procedure for correcting hand positions.

Troubleshooting

Hand Movement and Position

Addresses issues related to incorrect hand movement and alignment.

Sensor modes

Discusses errors indicated during operation of the watch's sensors.

Charging

Explains troubleshooting steps related to watch charging.

Time Calibration Signal

Covers troubleshooting for radio-controlled time synchronization.

Alarm

Addresses issues and troubleshooting for the watch's alarm function.

This document describes the operation and features of a CASIO watch, model MA1302-EA, with an Operation Guide number 5325. The watch is a solar-powered, radio-controlled atomic timepiece with a variety of functions including timekeeping, direction readings, stopwatch, countdown timer, and alarm.

Function Description

The CASIO watch is designed to provide accurate timekeeping through its radio-controlled atomic timekeeping feature, which receives time calibration signals. It also offers a digital compass for direction readings, a stopwatch for measuring elapsed and lap times, a countdown timer, and a daily alarm. The watch is powered by a solar panel and a rechargeable battery, making it a low-maintenance device.

Timekeeping

The watch displays time using hour, minute, and second hands, along with an upper dial hand for 24-hour format and a lower dial hand indicating the current mode. A day indicator also shows the current day of the week. The timekeeping mode is the default and central mode from which all other functions are accessed.

Radio-Controlled Atomic Timekeeping: The watch automatically updates its time settings by receiving time calibration signals up to six times a day (five times for the Chinese signal) between midnight and 5 a.m. This ensures high accuracy. Manual reception is also possible. The watch supports reception from transmitters in Japan, North America, Europe, and China, corresponding to specific Home City codes like TYO (Tokyo), HNL (Honolulu), LON (London), PAR (Paris), ATH (Athens), HKG (Hong Kong), and others. Signal reception can be affected by location (e.g., inside buildings, near appliances, mountains), power level, and ongoing operations.

Home City Settings: Users can configure their Home City from 29 global city codes. This setting is crucial for accurate time calibration signal reception and proper display of local time and Daylight Saving Time (DST).

Daylight Saving Time (DST) / Standard Time (STD) Switching: The watch offers an AUTO setting for DST, which automatically switches between standard time and daylight saving time according to its calendar. Users can also manually set it to STD or DST.

Manual Time and Day Settings: If signal reception is not possible, the current time and day settings can be adjusted manually using the crown. The watch's full automatic calendar accounts for different month lengths and leap years, so manual day adjustment is rarely needed once set.

Direction Readings

The watch features a magnetic sensor for taking digital compass readings. It can indicate magnetic north, and with calibration, true north. The 2 Second Hand points to magnetic north during a direction reading.

Calibration: To ensure accurate direction readings, bidirectional calibration is recommended, especially when using the watch in areas with magnetic interference or if readings differ from another compass. Northerly calibration is also available to detect true north.

Stopwatch

The stopwatch mode allows for measuring elapsed time and lap times. It can store up to 10 lap times and keeps track of the fastest lap time.

Countdown Timer

The countdown timer can be set for durations from one minute to 60 minutes. An alarm sounds for 10 seconds when the timer reaches zero.

Alarm

A daily alarm can be set to sound for 10 seconds at a preset time, even if the watch is not in the Alarm Mode.

Usage Features

The watch's operations are primarily controlled by its screw-in lock crown and three buttons (A, B, C).

Crown Operation: The crown must be rotated outwards to loosen it before use and screwed back in to maintain water resistance and prevent damage. It supports high-speed movement (HS1 and HS2) for quickly adjusting hands, either forward or backward, by rapidly rotating it.

Mode Selection: The watch has five modes: Timekeeping, World Time, Stopwatch, Countdown Timer, and Alarm. The 5 Lower Dial Hand indicates the current mode. Pressing button C cycles through these modes. Holding button C for at least two seconds returns the watch to Timekeeping Mode.

Checking Power Level: Pressing button B in Timekeeping Mode moves the 2 Second Hand to H (High), M (Mid), or L (Low) to indicate the current power level.

World Time: The World Time Mode allows viewing the current time in 29 different time zones. The 2 Second Hand indicates the selected World Time City.

Swapping Home City and World Time City: This feature allows users to quickly swap their Home City and World Time City, useful for frequent travelers.

Abnormal Magnetism Detection: If the 1 Hour Hand stops at 6 o'clock during a direction reading, it indicates abnormal magnetism. The watch also indicates sensor errors during operation if subjected to strong impact or internal circuitry issues.

Maintenance Features

The watch is designed with several features to ensure its longevity and reliable performance.

Solar Charging: The watch's face acts as a solar panel, charging a built-in rechargeable battery when exposed to light. This eliminates the need for regular battery replacements.

Power Saving: To conserve power, the watch enters a sleep state (second hand sleep or function sleep) when left in the dark for a certain period. Moving the watch to a well-lit area or pressing any button recovers it from sleep.

Power Recovery Mode: If power suddenly drops below a certain level (e.g., due to continuous signal reception or other operations), the watch enters a power recovery mode, temporarily stopping hand operation. Normal operation resumes after power recovers, which can be expedited by exposing the watch to light.

Low Battery Alert: If the power level is low (Level 2), the 2 Second Hand moves at two-second intervals. If power drops further (Level 3), the 2 Second Hand stops, and all functions are disabled. Recharging is necessary in these cases.

Auto Home Position Adjustment: The watch automatically corrects the home positions of its hands in Timekeeping Mode, ensuring accurate alignment even after exposure to strong magnetism or impact. Manual home position adjustment is also available for the day indicator or if auto-correction is insufficient.

Troubleshooting: The manual provides extensive troubleshooting guidance for common issues such as incorrect time settings, sensor malfunctions, charging problems, and alarm failures, directing users to relevant sections for solutions.