Casio 4378, 4379 Alarms, Timekeeping, Stopwatch, Alarm Operation, Setting the Digital Time and Date Manually, Daylight Saving Time (DST)

Operation Guide 4378 4379

Alarms

Timekeeping

On/Off status

Alarm number

Alternate at two-second interval

Alarm time (Hour : Minutes)

To set an alarm time

You can set three independent Daily Alarms. When an alarm is turned on, the alarm tone sounds when the alarm time is reached. You can also turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

•The alarm and Hourly Time Signal operate in accordance with the current digital time.

•The alarm number (AL1 though AL3) indicates an alarm screen. SIG appears in place of the alarm number when the Hourly Time Signal screen is shown.

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

1.In the Alarm Mode, press Dto select the alarm whose time you want to set.

Use the Timekeeping Mode to set and view the current time and date. This section also explains how to manually set the current date and time.

•In the Timekeeping Mode, press Ato cycle through the digital time screens as shown below.

•In the Timekeeping Mode, press Dto display the last signal screen. The last signal screen shows the date and time of the last successful time calibration signal reception.

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

Date Screen				Receiving indicator
Day	▲Receiving
	Press A.	Indicator and		Seconds
		Seconds Count
	▲		▲	A
	A	Current Time		Hour :
Day of week ▲		Screen
				Minutes
Press D.				PM indicator
▲
Reception date

AL1 AL2 AL3 SIG

2. Hold down Auntil the hour setting of the alarm time

On/Off status starts to flash, which indicates the setting screen.

•This automatically turns on the alarm.

3.Press C to move the flashing between the hour and minute settings.

4.While a setting is flashing, use D(+) and B(–) to change it.

•When setting the alarm time using the 12-hour format, take care to set the time correctly as a.m. (no indicator) or p.m. (P indicator).

•If you have 24-hour timekeeping selected in the Timekeeping Mode, the alarm time is also displayed in 24-hour format.

5.Press A to exit the setting screen.

Alarm Operation

The alarm sounds in all modes at the preset time for about 10 seconds, or until you stop it by pressing any button.

To test the alarm

In the Alarm Mode, hold down Dto sound the alarm.

To turn an alarm and the Hourly Time Signal on and off

1.In the Alarm Mode, press D to select an alarm or the Hourly Time Signal.

2.When the alarm or the Hourly Time Signal you want to set is selected, press Ato turn it on (ON) and off (OF).

Stopwatch

	2 seconds
	Reception Time
Last Signal Screen	2 seconds

2 seconds

Setting the Digital Time and Date Manually

Make sure you select your Home City code before you change the current time and date settings. World Time Mode times are all displayed in accordance with the Timekeeping Mode settings. Because of this, World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode.

To set the current digital time and date manually

	1. In the Timekeeping Mode, hold down Auntil the city
		code starts to flash, which indicates the setting screen.
		• The second hand will move at high speed to the 12
		o’clock position, where it will stop.
	2. Use Cto move the flashing in the sequence shown
		below to select other settings.
						12/24-Hour
City code		City Code		DST				Seconds
						Format
		Day	Month		Year		Minutes		Hour

3.When the setting you want to change is flashing, use B and/or Dto change it as described below.

1/100

Seconds second

More than

one minute

Minutes Seconds

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

•The display range of the stopwatch is 99 minutes, 59.99 seconds.

•The 1/100-second value appears while the elapsed time operation is stopped or while a split time is frozen on the display.

Elapsed Time Screen		1/100 second
Elapsed time
(Minutes : Seconds)
Split Time Screen	Split time
Split indicator	(Minutes : Seconds) 1/100 second

Screen:	To do this:			Do this:
	Change the city code			Use D (east) and B(west).
	Toggle between Daylight Saving			Press D.
	Time (ON) , Standard Time (OF),
	or Auto DST (A)
	Toggle between 12-hour (		) and	Press D.
	24-hour (	) timekeeping
	Reset the seconds to			Press D.
	Change the hour or minutes			Use D (+) and B(–).
	Change the year			Use D (+) and B(–).
	Change the month or day			Use D (+) and B(–).

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

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

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

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

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
Start	Split	Split release	Stop	Clear
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.

• See “City Code Table” for a complete list of available city codes.

4.Press Ato exit the setting screen.

•The second hand will advance at high speed to the correct position in accordance with the digital time seconds count, and resume normal movement from there.

•When you exit the setting screen, the analog hands are adjusted automatically to match the digital time. See “Analog Timekeeping” for more information.

Note

•Auto DST (A) can be selected only while BER, PAR, LON, or ATH is selected as the Home City code. For more information, see “Daylight Saving Time (DST)” below.

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.

The time calibration signals transmitted from Rugby and Mainflingen includes both Standard Time and DST data. When the Auto DST setting is turned on, the watch switches between Standard Time and DST (summer time) automatically in accordance with the received time signal.

•Auto DST (A) can be selected only while BER, PAR, LON, or ATH is selected as the Home City code.

•The default DST setting is Auto DST (A) whenever you select BER, PAR, LON, or ATH as your Home City code.

•If you experience problems receiving the time calibration signal in your area, it is probably best to switch between Standard Time and Daylight Saving Time (summer time) manually.

To change the Daylight Saving Time (summer time) setting

1.In the Timekeeping Mode, hold down Auntil the city code starts to flash, which indicates the setting screen.

2.Press Cto display the DST setting screen.

3.Use Dto cycle through the DST settings in the sequence shown below.

Auto DST (A) DST off (OF) DST on (ON)

4. When the setting you want is selected, press Ato exit the setting screen.

• The DST indicator appears on the display to indicate that Daylight Saving Time is turned on.

3