Timekeeping; Confi Guring Home City Settings; Current Time And Date Settings - Casio GDF100-1A Operation Manual

Operation Guide 3255
Selecting a Mode
• The illustration below shows which buttons you need to press to navigate between
modes.
• In any mode (except when a setting screen, with fl ashing digits is on the display),
press to illuminate the display.
World Time Mode World Time Mode
Stopwatch Mode Stopwatch Mode
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General Functions (All Modes)
The functions and operations described in this section can be used in all of the modes.
Auto Return Features
• The watch returns to the Timekeeping Mode automatically if you do not perform any
button operation for two or three minutes in the Alarm Mode.
• The watch will return to the Timekeeping Mode automatically if you do not perform
any operation for about one hour after entering the Barometer/Thermometer Mode.
• If you leave a setting screen with fl ashing digits on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Initial Screens
When you enter the World Time Mode or Alarm Mode, the data you were viewing
when you last exited the mode appears fi rst.
Scrolling
The and buttons are used on the setting screen to scroll through data on the
display. In most cases, holding down these buttons during a scroll operation scrolls
through the data at high speed.
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Confi guring Home City Settings
There are two Home City settings: actually selecting the Home City and selecting
either standard time or daylight saving time (DST).
To confi gure Home City settings
PM indicator PM indicator
1. In the Timekeeping Mode, hold down
City code City code
currently selected city code (Home City) starts to fl ash.
This is the city code setting screen.
• Before the city code starts to fl ash, the message
SET Hold will appear on the display. Keep
depressed until SET Hold disappears and the city
code starts to fl ash.
• The watch will exit the setting mode automatically if
you do not perform any operation for about two or
three minutes.
• For details about city codes, see the "City Code
Hour : Minutes Hour : Minutes
Table" at the back of this manual.
Seconds Seconds
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To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down
DST indicator DST indicator
currently selected city code (Home City) starts to fl ash.
This is the city code setting screen.
• Before the city code starts to fl ash, the message
SET Hold will appear on the display. Keep
depressed until SET Hold disappears and the city
code starts to fl ash.
2. Press to display the DST setting screen.
3. Press to toggle between Daylight Saving Time (On)
and Standard Time (OFF).
Setting Setting
4. After all the settings are the way you want, press
return to the Timekeeping Mode.
• The DST indicator appears to indicate that Daylight
Saving Time is turned on.
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3. Press to move the fl ashing in the sequence shown below to select the other settings.
City
12/24-Hour
DST Seconds
Code
Format
Barometer Altitude Temperature
unit unit unit
• The following steps explain how to confi gure timekeeping settings only.
4. When the timekeeping setting you want to change is fl ashing, use
change it as described below.
Screen To do this:
Change the city code
Toggle between Daylight Saving Time (On)
and Standard Time (OFF).
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Barometer/ Barometer/
Thermometer Mode Thermometer Mode
Countdown Countdown
Timer Mode Timer Mode
until the
until the
to
Hour Minute Year Month
Illumination Button Operation
Day
Duration Tone On/Off
and/or to
Do this:
Use (East) and
(West).
Press .
Timekeeping Mode Timekeeping Mode
Alarm Mode Alarm Mode

Timekeeping

Use the Timekeeping Mode to set and view the current
PM indicator PM indicator Graphic Graphic
time and date.
Day of week Day of week
• In the Timekeeping Mode, the graphic in the upper right
corner of the display indicates the passage of seconds.
Month Day Month Day
Hour : Minutes Hour : Minutes Seconds Seconds
2. Press (East) and
DST indicator DST indicator
you want to use as your Home City.
• Keep pressing
to select as your Home City appears on the display.
3. Press to display the DST setting screen.
4. Press to toggle between Daylight Saving Time (On)
and Standard Time (OFF).
• Note that you cannot switch between standard
time and daylight saving time (DST) while UTC is
selected as your Home City.
Setting Setting
5. After all the settings are the way you want, press
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
Note
• After you specify a city code, the watch will use UTC* offsets in the World Time
Mode to calculate the current time for other time zones based on the current
time in your Home City.
* Coordinated Universal Time, the world-wide scientifi c standard of timekeeping.
The reference point for UTC is Greenwich, England.
Confi guring Current Time and Date Settings
You can use the procedure below to adjust the current time and date settings if they
are off.
To change the current time and date settings
1. In the Timekeeping Mode, hold down
PM indicator PM indicator
currently selected city code (Home City) starts to fl ash.
This is the city code setting screen.
City code City code
• Before the city code starts to fl ash, the message
SET Hold will appear on the display. Keep
depressed until SET Hold disappears and the city
code starts to fl ash.
2. Use and
• Select your Home City code before changing any
other setting.
• For full information on city codes, see the "City
Code Table" at the back of this manual.
Hour : Minutes Hour : Minutes Seconds Seconds
Screen To do this:
Toggle between 12-hour (12H) and 24-hour
(24H) timekeeping.
Reset the seconds to 00
Change the hour or minute
Change the year, month, or day
5. Press to exit the setting screen.
Altimeter Mode Altimeter Mode
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(West) to select the city code
or until the city code you want
to return to the Timekeeping Mode.
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until the
to select the city code you want.
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Do this:
Press .
Press .
Use (+) and
(–).
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