Casio 5179 World Time, Stopwatch, Home City and DST, Cumulative Elapsed Time Measurement, Daylight Saving Time (summer time), Swapping your Home City and World Time City

Operation Guide 5179

Problem	Probable Cause	What you should do
The time setting	• The Home City setting is not	• Select the correct Home
is incorrect	correct for the area where you are	City (page E-12).
following signal	using the watch.	• Enter the home position
reception.	• The home position of the hands is	adjustment mode and
	off.	adjust the home position
		(page E-45).

•For further information, see “Important!” (page E-21) and “Radio-controlled Atomic Timekeeping Precautions” (page E-60).

E-30

To start or stop an elapsed time operation

In the Stopwatch Mode, press B to start and stop the stopwatch.

•Pressing Dduring an elapsed time operation stops the hands at the split time. Elapsed time measurement continues internally. After about five seconds, the hands will return to normal elapsed time indication.

•1/20-second timing is performed only for the first 30 seconds after you start or restart an elapsed time operation. The 1/20-second hand also jumps to the elapsed time position when you stop an elapsed time operation.

•Pressing D while the stopwatch is stopped will reset stopwatch to zero. The following operations are not possible while the watch’s hands are moving during a stopwatch elapsed time operation.

Split, reset

E-32

World Time

City code		World time lets you display the current time in any one of
		29 cities (29 time zones) around the world.
		• If the current time is not correct, check your current
		Home City settings and make adjustments as required
		(page E-38).
		• The following operations are not possible while the
		watch’s hands are moving to the current time for a newly
	30	selected city code.
		Using A to switch between standard time (STD) and
		daylight saving time (DST).
		Using B to swap the Home City and World Time City
World Time		• For full information on city codes, see the “City Code
		Table” at the back of this manual.

In the World Time Mode, indicates the current daylight saving time setting (STD or DST).

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Stopwatch

The stopwatch measures elapsed time in units of 1/20

Stopwatch second hand				second up to 23 hours, 59 minutes, 59.95 seconds (24
				hours). When the maximum limit is reached, the elapsed
				time returns to zero automatically and timing continues
				from there.
	30
Stopwatch time			Points to 0 in the
hour and minute			Stopwatch Mode.
hands			Functions as a 1/20-
			second hand during an
			elapsed time operation.
							E-31
To measure elapsed time
B					B		D
Start					Stop		Reset
To measure split times
B		D		Normal measurement		B	D
Start		Split		resumed after 5 seconds.		Stop	Reset

•Pressing D again while a split time is indicated will cause the hands to jump to a new (current) split time.

•Pressing B while a split time is indicated will stop the elapsed time operation, causing the hands to jump to the stop time.

Cumulative Elapsed Time Measurement

Pressing B to restart the stopwatch without resetting it will resume the elapsed time operation from where it was last stopped.

E-33

To search for a city

In the World Time Mode, press Dto move the second hand (which is pointing at the currently selected city code) clockwise.

•About one second after you release D, the hands of the watch will move to the current time in the zone of the city code indicated by the second hand.

Daylight Saving Time (summer time)

Daylight saving time calls for setting clocks ahead one hour from standard time during the summer season.

•Note that the start and end of daylight time, and whether it is used at all depends on each country and geographic area.

Standard time The hand points to STD (standard time).

Daylight saving time The hand points to DST (daylight saving time).

E-35

To change the STD/DST setting of a particular city code

1. In the World Time Mode, use D to select the city whose setting you want to change.

2. Hold down A for about two seconds to toggle between daylight saving time and standard time.

• You can select STD or DST for each World Time city code, except UTC.

30

▲ Hold down

A for two seconds.

▲

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Home City and DST

Swapping your Home City and World Time City

You can use the procedure below to swap your Home City and World Time City. This capability can come in handy when you travel frequently between two cities in different time zones.

•If your current World Time City supports receipt of a time calibration signal, making it your Home City enables calibration signal reception.

To swap your Home City and World Time City

1.In the World Time Mode, use D to select the World Time City you want.

2.Hold down B for about three seconds.

•This will make the World Time City (which you selected in step 1), your Home City. At the same time, it will change the Home City you had selected prior to step 2 to your World Time City.

•After swapping the Home City and World Time City, the watch stays in the World Time Mode with the city that was selected as the Home City prior to step 2 now displayed as the World Time City.

E-37

• Home City C Hour and C Year C Month C Day

3030

City code

Use the procedure in this section to configure your Home City (the place where you normally use the watch) and daylight saving time settings.

•Use the Timekeeping Mode to configure Home City and daylight saving time settings.

To set your Home City time

1.In the Timekeeping Mode, keep A depressed (for about five seconds) as the second hand moves to the last signal reception result (“Y” or “N”), then to “READY” (or “R” for some models), and then to the city code of

the currently selected Home City.

• This indicates the city code setting mode.

2.Use C to cycles through available settings in the sequence shown below.

• DST setting minute

C

3.Use D to move the second hand clockwise to select the city code you want.

4.While the city code you want is selected, press B to toggle between STD (standard time) and DST (daylight saving time).

•You will not be able to change the STD/DST setting while the watch’s hands are moving to the current time for a newly selected city code. Wait until the hands stop moving.

Standard time	The hand points to STD (standard time).
Daylight saving time	The hand points to DST (daylight saving time). Daylight
	saving time is one hour ahead of standard time.

E-38 E-39