Casio GD-100MS-3ER Instruction manual

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About This Manual

Indicators

Alarm on indicator

Hourly time signal on indicator

Operation Guide 3263

Depending on the model of your watch, display text appears • either as dark ﬁgures on a light background or light ﬁgures on a dark background. All sample displays in this manual are shown using dark ﬁgures on a light background. Button operations are indicated using the letters shown • in the illustration. 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.

Mute indicator

Graphic area A

DST indicator

PM indicator

Flash Alert on indicator

Graphic area B

Auto light switch on indicator

General Guide

Press • C to change from mode to mode. In any mode (except when a setting screen is on the display), press B to illuminate

• .

the display

Timekeeping Mode World Time Mode Alarm Mode Stopwatch Mode

Press C.

Timekeeping

Day of week

Month – Day

PM indicator

Hour : Minutes Seconds

Switching Between Time Screens

Each press of D cycles the time screens in the sequence shown below.

While the Home City Time (T-1) screen is displayed, pressing • A will switch the day of the week / month-day indication to the currently selected Home City code and the T-1 indicator for about one second. You can change the current time setting for your Home City Time (T-1) only. • For Local Times (T-2, T-3, T-4), you only can change the city code and DST setting. •

Scrolling through the Time Screens

In the Timekeeping Mode, holding down • D for about three seconds will cycle the time screens in sequence, from T-1 through T-4. Pressing any button will display the Home City Time (T-1) screen. •

The Timekeeping Mode’s Multi Time feature gives you quick and easy access to the current time and date in four different cities, numbered from T-1 (Time 1) through T-4 (Time 4). T-1 is your Home City Time, and T-2, T-3, and T-4 are Local Times. Local Times are kept in synchronization with your Home City Time (T-1).

Displayed for one second

D D

Changing the Current Home City Time and Date Settings

When the setting you want to change is ﬂashing, use 4. D and B to change it as described below.

Screen To do this: Do this:

Reset the seconds to .

Toggle between Daylight Saving Time ( ) and Standard Time ( ).

Change the city code.

Change the hour or minutes.

Toggle between 12-hour ( ) and 24-hour ( ) timekeeping.

Change the year.

Change the month or day.

Toggle the setting between 1.5 seconds ( ) and 3 seconds ( ).

Toggle between Flash Alert on ( ) and off ( ).

See “Daylight Saving Time (DST)” for details about DST setting. • For information about Flash Alert, see “Flash Alert”. •

Press 5. A to exit the setting screen.

The day of the week is displayed automatically in accordance with the date (year, • month, and day) settings.

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time.

Countdown Timer

Mode

Use 1. D to display the current Home City Time (T-1) screen. Hold down 2. A until the seconds start to ﬂash, which indicates the setting screen. Press 3. C to move the ﬂashing in the sequence shown below to select other settings.

Press D.

Use D (east) and B (west).

Use D (+) and B (–).

Press D.

Use D (+) and B (–).

Press D.

Operation Guide 3263

To toggle the Timekeeping Mode time between DST and Standard Time

DST indicator

12/24-Hour Format

With the 12-hour format, the • P (PM) indicator appears to the left of the hour digits for times in the range of noon to 11:59 p.m. and no indicator appears to the left of the hour digits for times in the range of midnight to 11:59 a.m. With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without • any indicator. The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is • applied in all other modes.

Changing the City Setting of a Local Time

You can select any one of the city codes in the table at the back of this manual as a Local Time city.

Display the Local Time whose city setting you want to change, and then hold down 1. A for about one second until the current city code starts fo ﬂash. Use 2. D (east) and B (west) to select the city code you want. Press 3. C to display the DST setting screen. Press 4. D to toggle between Daylight Saving Time (

displayed).

Time ( After the settings are the way you want, press 5. A.

Swapping the Home City Time with a Local Time

You can use the procedure below to swap the current Home City Time (T-1) with one of the Local Times (T-2, T-3, T-4).

In the Timekeeping Mode, use 1. D to display the Local Time that you want to swap with the Home City Time. Press 2. A and B at the same time.

Use 1. D to display the current Home City Time (T-1) screen. Hold down 2. A until the seconds start to ﬂash, which indicates the setting screen. Press 3. C to display the DST setting screen. Press 4. D to toggle between Daylight Saving Time

displayed) and Standard Time ( displayed).

( Press 5. A to exit the setting screen.

The • DST indicator appears on the Timekeeping screen to indicate that Daylight Saving Time is turned on.

displayed) and Standard

World Time

City code

Current time and date in the zone of the selected city code

To toggle a city code time between Standard Time and Daylight Saving Time

DST indicator

To change your Home Time city to the current World Time city

In the World Time Mode, use 1. D to display the city you want to make your new Home Time city. Press 2. A and B at the same time.

This makes the World Time city you selected in step 1 your new Home Time city. •

World Time shows the current time in 48 cities (31 time zones) around the world.

All of the operations in this section are performed in the • World Time Mode, which you enter by pressing C.

To view the time for another city code

In the World Time Mode, press D to scroll eastwardly through city codes.

For full information about city codes, see the “City Code • Table”. If the current time for a city is wrong, check your • Timekeeping Mode time and time zone settings and make the necessary changes.

In the World Time Mode, use 1. D (east) to display the city code (time zone) whose Standard Time/Daylight Saving Time setting you want to change. Hold down 2. A for about one second to toggle Daylight Saving Time (DST displayed) and Standard Time (DST

not displayed). The • DST indicator is on the display whenever you display a city code for which Daylight Saving Time is turned on. Note that the DST/Standard Time setting affects only • the currently displayed city code. Other city codes are not affected. Note that you cannot switch between Standard Time • and Daylight Saving Time while UTC is selected as the city code.

To set an alarm time

After you select an alarm, hold down 2. A until the hour setting of the alarm time starts to ﬂash, which indicates the setting screen.

This operation turns on the One-time Alarm automatically. •

Press 3. C to move the ﬂashing in the sequence shown below to select other settings.

While a setting is ﬂashing, use 4. D and B to change it as described below.

Screen To do this: Do this:

Change the hour and minutes.

Toggle between One-

time Alarm and Daily Alarm.

Press 5. A to exit the setting screen.

Alarm Operation

The alarm tone sounds at the preset time for 20 seconds, regardless of the mode the watch is in.

Alarm and Hourly Time Signal operations are performed in accordance with the • Home City Time (T-1). To stop the alarm tone after it starts to sound, press any button. •

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

To turn an alarm on and off

In the Alarm Mode, use 1. D to select an alarm. Press 2. A to cycle through the alarm settings as shown below.

Alarm Off One-Time Alarm OnDaily Alarm On

In all modes, the alarm on indicator is shown for the alarm that is currently turned • on. The alarm on indicator ﬂashes while the alarm is sounding. •

To turn the Hourly Time Signal on and off

Hourly time signal on indicator

In the Alarm Mode, use 1. D to scroll through the alarm screens until the alarm number you want to set is displayed.

Hour Minutes

One-time Alarm/Daily Alarm Selection

Use D (+) and B (–).

With the 12-hour format, set the time correctly • as a.m. or p.m. (P indicator).

Press D. One-time Alarm on: Daily Alarm on:

In the Alarm Mode, use 1. D to select the Hourly Time Signal. Press 2. A to toggle it on and off.

The Hourly Time Signal on indicator is shown on the • display in all modes while this function is turned on.

Countdown Timer

1/10 second

The countdown timer can be set within a range of one second to 24 hours. An alarm sounds when the countdown reaches zero.

All of the operations in this section are performed in the • Countdown Timer Mode, which you enter by pressing C.

Alarms

Alarm on indicator

Alarm time (Hour : Minutes)

Alarm number

Your watch has a total of ﬁve alarms, each of which you can conﬁgure as a daily alarm or one-time alarm.

Daily Alarm: Sounds at the preset time each day. • One-time Alarm: Sounds once at the preset time and then • is disabled automatically.

You can also turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

All of the operations in this section are performed in the • Alarm Mode, which you enter by pressing C. Alarms operate in coordination with the current Home • City Time.

Hours

Minutes

Seconds

To conﬁgure the countdown timer

When the setting you want to change is ﬂashing, use 3. D (+) and B (–) to change the ﬂashing item.

To specify a countdown start time of 24 hours, set •

Press 4. A to exit the setting screen.

While the countdown start time is on the display in the 1. Countdown Timer Mode, hold down A until the current countdown start time starts to ﬂash, which indicates the setting screen.

If the countdown start time is not displayed, use the • procedure under “To use the countdown timer” to display it.

Press 2. C to move the ﬂashing in the sequence shown below to select other settings.

Hours Minutes Seconds

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