Casio 5311 Mode Reference Guide, Timekeeping, Configuring Home City Settings, STD/DST Switching, Daylight Saving Time (DST)

Operation Guide 5311

Note

ξThe x Second Hand will indicate N (NO) if you have adjusted the time or day setting manually since the latest receive operation.

To turn auto receive on and off

Y (YES) 1. In the Timekeeping Mode, press B. The x Second Hand will move to Y (YES) or N (NO) to indicate the last calibration signal receive result.

Radio-controlled Atomic Timekeeping Precautions

ξ Strong electrostatic charge can result in the wrong time setting.

ξ Even if a receive operation is successful, certain conditions can cause the time

setting to be off by up to one second.

ξ The watch is designed to update its day setting automatically for the period from

January 1, 2000 to December 31, 2099. Updating of the day setting by signal

reception will no longer be performed starting from January 1, 2100.

ξ If you are in an area where signal reception is not possible, the watch keeps time

with the precision noted in “Specifications” (page E-95).



2. Pull out the crown.

The x Second Hand will perform one full revolution and then stop at the current on/off setting.

3. Rotate the crown to move the x Second Hand to the setting you want.

ξ To turn on auto receive, select Y (YES).

ξTo turn off auto receive, select N (NO).

ξ The receive operation is disabled under any of the following conditions.

− While power is at Level 2 or lower (page E-16)

− While the watch is in the power recovery mode (page E-17)

− While the watch is in the function sleep state (power saving, page E-19)

− While the watch is not in the Timekeeping Mode

− While a direction reading or Countdown Timer operation is in progress (even if the

watch is in the Timekeeping Mode)

N (NO)

4.Push the crown back in to return to the Timekeeping Mode.

ξ A receive operation is cancelled if an alarm sounds while it is being performed.

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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 or view
the last receive result	Timekeeping Mode
ξ Change the Auto Receive on/off setting		E-35
ξ Configure time and day settings manually
ξ Determine magnetic north		E-48
ξ View the current time in one of 29 cities around the globe		E-63
ξ Configure World Time City and summer time settings	World Time Mode	E-64
ξ Swap the Home City and World Time City		E-67
Use the stopwatch to measure elapsed time	Stopwatch Mode	E-69
Use the countdown timer	Countdown Timer	E-72
	Mode

To do this:	Enter this mode:	See:
ξ Set an alarm time	Alarm Mode	E-75
ξ Turn the alarm ON or OFF		E-78

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-34).

	To return to the Timekeeping Mode from any other
	mode

Hold down Cfor at least two seconds.

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To select a mode

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

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

E-34

Timekeeping

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

Hand Functions

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-35

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.

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.

TYO (TOKYO)

ξIf 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.

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

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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-36).

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.

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