Casio 5105 Stopwatch, Countdown Timer, World Time, Alarms, Dual Time, Right Dial Hand, Swapping your Home City and World Time City

Operation Guide 5105

Stopwatch

To change the Daylight Saving Time (summer time) setting

			1. In the Timekeeping Mode, hold down A for about five
lll			seconds until the left dial hand points to T1 and the city
			code flashes on the upper display. This is the setting
l	l
l	l		mode.
l
l		l
lll			2. Press C. This will display the DST setting screen.
			3. Press Dto toggle between Daylight Saving Time (ON
			displayed) and Standard Time (OFF displayed).
			4. When the setting you want is selected, press A twice
			to exit the setting mode.
DST indicator			• The DST indicator appears to indicate that Daylight

Saving Time is turned on.

Dual Time

Hours

Minutes 1/100 second

Seconds

The stopwatch lets you measure elapsed time, split times, and two finishes.

•The digital display range of the stopwatch is 23 hours, 59 minutes, 59.99 seconds.

•The stopwatch continues to run, restarting from zero after it reaches its limit, until you stop it.

•The stopwatch measurement operation continues even if you exit the Stopwatch Mode.

•Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time and returns to elapsed time measurement.

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

Dual Time lets you display the current time in another time zone called your “Dual Time City”, in addition your Home City’s current time. This feature is very handy for business professionals and others who need to keep track of the current time in two different time zones.

•For information about how to display the current time in the Dual Time City in the lower display, see “Timekeeping”.

To specify the Dual Time City

To measure times with the stopwatch
Elapsed Time
D	➤ D	➤ D	➤ D	➤ A
Start	Stop	Re-start	Stop	Clear
Split Time
D	➤ A	➤ A	➤ D	➤ A

l	ll ll
	l
l		l
l		l
	ll ll

Left dial hand

1.In the Timekeeping Mode, hold down Afor about five seconds until the left dial hand points to T1 and the city code flashes on the upper display. This is the setting mode.

2.Press Aagain. The left dial hand will move to T2 and the current Dual Time City code will start to flash on the upper display. This is the Dual Time City selection screen.

3.Use D(eastward) and B (westward) to scroll through the available city codes.

•See the “City Code Table” for information about city codes.

4.Press Ato exit the setting mode.

Start	Split	Split release	Stop	Clear
	(SPL displayed)
Two Finishes
D	➤ A	➤ D	➤ A	➤ A
Start	Split	Stop	Split release	Clear
	First runner	Second runner	Display time of
	finishes.	finishes.	second runner.
	Display time of
	first runner.

Countdown Timer

World Time

Start time (minutes)

You can set the countdown timer start time within a range of one minute to 60 minutes. An alarm sounds when the

Currently selected

World Time City

Right dial hand (World Time hour)

World Time digitally displays the current time in one of 48 cities (29 time zones) around the world. A simple operation swaps your Home City with the currently selected World Time City.

• The times kept in the World Time Mode are

synchronized with the time being kept in the

Timekeeping Mode. If you feel that there is an error in

any World Time Mode time, check to make sure you

have the correct city selected as your Home City. Also

check to make sure that the current time as shown in

the Timekeeping Mode is correct.

• Times in the World Time Mode are based on UTC

Minutes

Seconds

countdown reaches zero.

•You also can select auto-repeat, which automatically restarts the countdown from the original value you set whenever zero is reached.

•All of the operations in this section are performed in the

Countdown Timer Mode, which you enter by pressing

C.

Current time in World Time City

offsets. See the “City Code Table” for information about

the UTC offsets that are supported.

• All of the operations in this section are performed in the

World Time Mode, which you enter by pressing C.

To use the countdown timer

Press Dwhile in the Countdown Timer Mode to start the countdown timer.

• When the end of the countdown is reached and auto-repeat is turned off, the alarm

will sound for 10 seconds or until you stop it by pressing any button. The countdown

time is reset to its starting value automatically after the alarm stops.

Right Dial Hand

The right dial hand shows the current hour in the World Time City in all modes.

•The right dial hand moves just like the normal hour hand, completing one revolution every 12 hours.

•Between the noon and midnight in the World Time Mode, a PM indicator (PM▼) appears above the right dial hand.

To view the current time in another time zone

In the World Time Mode, use Dto scroll through available city codes (time zones). Holding down the button scrolls at high speed.

•When the city code (time zone) you want is selected, you can press Ato display the date. After about one second, the watch will resume regular timekeeping.

	Press A.
	▲
	One second
Hour : Minutes Seconds	Date

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

1.In the World Time Mode, press Dto display the city code (time zone) whose Standard Time/Daylight Saving Time setting you want to change.

2.Hold down Afor about three seconds to toggle

between Daylight Saving Time (DST indicator displayed) and Standard Time (DST indicator not displayed).

•The DST indicator is shown in the bottom (World Time) display while Daylight Saving Time is turned on.

• When auto-repeat is turned on, the countdown will restart automatically without

pausing when it reaches zero. The alarm sounds to signal when the countdown

reaches zero. The countdown is repeated up to eight times, and then stops.

• The number of the current repeat (1 to 8) is shown in the lower display.

• The countdown timer measurement operation continues even if you exit the

Countdown Timer Mode.

• To stop a countdown timer operation completely, first pause it (by pressing D), and

then press A. This returns the countdown time to its starting value.

To configure countdown start time and auto-repeat settings

1.While the countdown start time is on the display in the Countdown Timer Mode, hold down A for about three

			seconds until the minute setting of the countdown start
			time starts to flash. This is the setting mode.
lll			• If the countdown start time is not displayed, use the
			procedure under “To use the countdown timer” to
l	l
l	l		display it.
l
l	l	l
ll			2. Press Cto move the flashing in the sequence shown
			below, and select the setting you want to change.
Start time (minutes)			Start Time	C	Auto-Repeat
			(Minutes)		On/Off

3.Perform the following operations, depending on which setting currently is selected on the display.

•While the start time setting is flashing, use D(+) and B(–) to change it.

•While the auto-repeat on/off setting (on or OFF) is flashing on the display, press D to toggle auto-repeat on (on) and off (OFF).

4.Press Ato exit the setting mode.

• The auto-repeat on indicator () is displayed on the Countdown Timer Mode screen while this function is turned on.

•Frequent use of auto-repeat and the alarm can run down battery power.

Alarms

DST indicator

Swapping your Home City and World Time City

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

To swap your Home City and World Time City

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

2.Hold down Aand Buntil the watch beeps.

•This will make the World Time City you selected in step 1 your Home City, and cause the hour and minute hands to move to the current time in that city. At the same time, it will change the Home City you had selected prior to step 2 your World Time City, and cause the content upper and lower displays to change accordingly.

•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.

Alarm number

Alarm time (Hour : Minutes)

When an alarm is turned on, the alarm tone will sound when its alarm time is reached. One of the alarms is a snooze alarm, while the other four are one-time alarms. You also can turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

•There are five alarm screens numbered AL1, AL2, AL3 and AL4 for the one-time alarm, and a snooze alarm screen indicated by SNZ. The Hourly Time Signal screen is indicated by SIG.

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

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