Casio 5240 Mode Reference Guide, Timekeeping, Configuring Home City Settings, Configuring Current Time and Day Settings Manually, STD/DST Switching

Operation Guide 5240

Mode Reference Guide

Your watch has fi ve “modes”. The mode you should select depends on what you want to do.

To do this:	Enter this mode:	See:
ξ Configure Home City and DST (daylight saving time) settings
ξ Perform a time calibration signal receive operation
ξ Change the Auto Receive on/off setting	Timekeeping Mode	E-33
ξ Configure time and day settings manually
ξ Measure temperature
ξ View the current time in one of 29 cities around the globe		E-53
ξ Configure World Time City and summer time settings	World Time Mode	E-54
ξ Swap the Home City and World Time City		E-57
Use the stopwatch to measure elapsed time	Stopwatch Mode	E-58
Use the countdown timer	Countdown Timer	E-61
	Mode
ξ Set an alarm time	Alarm Mode	E-64
ξ Turn the alarm ON or OFF		E-67
E-30

Selecting a Mode

With this watch, everything starts from the Timekeeping Mode.

To determine the watch’s current mode

Check what the b Lower Dial Hand is indicating as shown under “To select a mode” (page E-32).

	To return to the Timekeeping Mode from any other
	mode

Hold down Cfor at least two seconds.

E-31

To select a mode

Each press of Cwill cycle between modes. The currently selected mode is indicated by the b Lower Dial Hand.

	C
Timekeeping Mode	World Time Mode
	C
C	Stopwatch Mode
	C
Alarm Mode	Countdown Timer Mode
	C

E-32

Timekeeping

To enter the Timekeeping Mode, hold down Cat least two seconds.

Hands and Indicators

zHour Hand

x Second Hand

c Minute Hand

v Upper Dial Hand: Indicates the current hour in the



Home City time in 24-hour format.

b Lower Dial Hand: Points to the day of the week.

n Day Indicator

E-33

Configuring Home City Settings

The Home City is location where you will normally use the watch. You can choose from a selection of city codes that represent 29 cities around the globe.

ξ If you do not perform any operation with the crown for about two minutes after

pulling it out, crown operations will become disabled and the hand will not move

if you rotate the crown. If this happens, push the crown back in and then pull it

out again.

ξ For details about city codes, see the “City Code Table” at the back of this



To configure Home City settings

Note

ξ This watch does not have a city code that corresponds to Newfoundland.

1. Pull out the crown.

ξ This will cause the x Second Hand to move to the city code of the currently selected Home City.

ξ This indicates the city code setting mode.

manual.

2.Rotate the crown to move the x Second Hand to the city code you want to select as your Home City.

	ξ Each time you select a city code, the z Hour Hand,
	c Minute Hand and n Day Indicator move to the
	current time and day for that city code.
	3. Push the crown back in to return to the Timekeeping
	Mode.

TYO (TOKYO)

E-34 E-35

STD/DST Switching

You can select summer time or standard time independently for each city. The initial default setting for all cities is AT (AUTO).

Normally you should use the AT (AUTO) setting because it automatically switches between summer time and standard time. You should change the setting to STD (standard time) or DST (summer time) in the following cases.

−When using a time of a location that is not included in the watch’s list of 29 cities

−When the preset AUTO standard time/summer time timing is incorrect for some reason

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.

ξNote that you cannot switch between STD (standard time) and DST (daylight saving time) while UTC* is selected as your Home City.

*Coordinated Universal Time, the world-wide scientific standard of timekeeping. The reference point for UTC is Greenwich, England.

To switch between standard time and summer time manually

1.Perform steps 1 and 2 under “To confi gure Home City settings” (page E-34).

ξSelecting a city code will cause the z Hour Hand, c Minute Hand, and

v Upper Dial Hand to move automatically to the current time for the selected city code.

ξIf you will use the watch in a city that is not included in the city code list, select a city code that is in the same time zone as your city.

ξDisplaying the Home City Settings screen will cause the b Lower Dial Hand to move to AT (auto switching), STD (standard time), or DST (daylight saving time).

AT (AUTO) The watch automatically switches between standard time and daylight saving time in accordance with its calendar.

STD	The watch always shows standard time.
DST	The watch always shows daylight saving time.

E-36 E-37

2.Hold down Afor about one second to cycle through the summer time settings as shown below.

A A

AT (AUTO) STD DST

A

3. After the setting is way you want, push the crown back in.

Configuring Current Time and Day Settings Manually

You can confi gure current time and day settings manually when the watch is unable to receive a time calibration signal.

To change the current time setting manually

1. Pull out the crown.

ξ This will cause the x Second Hand to move to the city code of the currently selected Home City.

	ξ If you do not perform any operation with the crown
	for about two minutes after pulling it out, crown
	operations will become disabled and the hand will
	not move if you rotate the crown. If this happens,
	push the crown back in and then pull it out again.

TYO (TOKYO)

E-38 E-39