Casio 4723 Alarm, Adjusting the Home Positions, Timekeeping, Illumination, Alarm Operation, Setting the Time and Date Manually, Daylight Saving Time (DST)

Operation Guide 4723

Alarm

Alarm time minute handAlarm time 24- hour hand

Alarm time	On/Off status
hour hand

When the alarm is turned on, the alarm sounds when the alarm time is reached.

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

To set an alarm time

1.In the Alarm Mode, hold down Afor two seconds to display the setting mode.2.Use B to change the alarm time.•Press Bto move the hands clockwise in one-minute steps.3.After setting the alarm time, press Ato exit the setting mode.•Setting the alarm time causes the alarm to turn on automatically.

To set the time and date manually

DST indicator								1. In the Timekeeping Mode, hold down Auntil the GMT
								differential value 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.
		ll l l l l			ll		GMT differential value
	l
l						l
l						l
l		l	l l l l	ll				: +2.0	: -4.0
									Minus sign

• The GMT differential value indicates the time difference in hours between

Greenwich Mean Time and the currently selected time zone.

• The DST indicator indicates that Daylight Saving Time (summer time) is turned on

for the currently selected time zone.

2. Use Bto select the time zone you want to use as your Home Time Zone.

• For full details about GMT differential values, see the “Time Zone Table”.

Alarm Operation

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in.

•Alarm operations are performed in accordance with the Timekeeping Mode time.•Pressing any button stops the alarm tone operation.

To toggle an alarm on and off

In the Alarm Mode, press Bto toggle the alarm ON and OFF.•The watch will beep when you turn on the alarm.

Adjusting the Home Positions

•If the time and date settings are wrong even after the time calibration signal is received normally, use the following procedure to adjust their home positions.

•You can use the procedure in this section to adjust the position of the second hand, the stopwatch minute hand and stopwatch 1/20 second hand whenever they do not align with the 12 o’clock position when you enter the Hand Setting Mode.

To adjust the home positions

Second hand						1. In the Timekeeping Mode, press Cfour times to enter
						the Hand Setting Mode.
						2. Hold down Auntil 0 0 starts to flash, which indicates
						the analog setting screen.
						• The second hand is at the proper home position if it
						moves to 12 o’clock. If it doesn’t, press Bto move it
						to 12 o’clock.
	ll			l		3. After confirming that the second hand is at the proper
	ll l l lll
	l			l
	l		l l l		l	home positions, press C. This will switch to hour hand
	ll			ll
						and minute hand home position adjustment (Hm
						flashed).
Minute hand	Hour hand					• The hour hand and minute hand are at their proper
						home positions if they both move to 12 o’clock, and if
						the 24-hour hand is pointing at hour 24. If the hands
						are not positioned correctly, use B to move them to
						their proper home positions.
	ll					4. After confirming that the hour hand and minute hand
				l		are both at their proper home positions, press C.
	ll l l lll
	l			l
	l			ll		This will switch to stopwatch 1/20 second hand home
	l	l l l l l
						position adjustment (20 flashed).
						• The stopwatch 1/20 second hand is at the proper
Stopwatch 1/20 second hand						home position if it moves to 0 position. If it doesn’t,
						use Bto move it to 0 position.
						5. After confirming that the stopwatch 1/20 second hand is
						at the proper home positions, press C. This will switch
						to stopwatch minute hand home position adjustment
	ll l l lll					(60 flashed).
						• The stopwatch minute hand is at the proper home
	l			l
	l			l
	ll			ll
	l					position if it moves to 60 position.If it doesn’t, use B
		l ll l l
						to move it to 60 position.
						6. Press Ato exit the setting screen.
Stopwatch minute hand						• After you complete the home position adjustment
						procedure, place the watch in a location that allows
						good time calibration signal reception, and then perform
						a manual receive operation. See “To perform manual
						receive” for more information.
	ll l l lll
	l			l
	ll			l
	l			ll
	l	l l l l l

Timekeeping

Use the Timekeeping Mode to set and view the current

Hour hand Minute hand time and date. This section also explains how to set the current date and time manually.

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

Date

24-Hour hand

Second hand

Setting the Time and Date Manually

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

•When setting the time and date, you can also configure settings for your Home Time Zone (the time zone where you normally use the watch) and summer time (Daylight

Saving time or DST).

3. Press Cto move the flashing in the sequence shown below to select other

settings.

GMT differential	DST	Minutes
value

Day Month Year

4.When the setting you want to change is flashing, use B to change it as described below.

Screen	To do this:	Do this:
	Change the time zone	Use B.
	Toggle between Daylight Saving Time ( ),	Press B.
	Standard Time ( ), or Auto DST ( )
	Change the minutes (time)	Use B.
	Change the year	Use B.
	Change the month	Press B.
	Change the day	Press B.

5. Press Ato exit the setting screen.

•When you exit the setting screen, the analog hands are adjusted automatically to

match the digital time.

• Auto DST () can be selected only while +0.0, +1.0, or +2.0 (+1.0, +2.0, or +3.0 while DST is turned on) is selected as the Home Time Zone. 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 include 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 signal it receives.

•The auto DST setting can be turned on only while +0.0, +1.0, or +2.0 (+1.0, +2.0, or +3.0 while DST is turned on) is selected as the Home Time Zone.

•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 GMT differential value starts to flash, which indicates the setting screen.

2.Press Cto display the DST setting screen.3.Press Bto cycle through the DST settings in the sequence shown below.

Auto DST ( ) DST off ( ) DST on ( )

4. Press Ato exit the setting screen.

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

•Turning on DST causes the GMT differential value to be increased by one.

Illumination

An LED (light-emitting diode) illuminate the face of the watch for easy reading in the dark. The watch’s auto light switch illuminates the face automatically when you angle the watch towards your face.

•The auto light switch must be turned on for it to operate.

•See “Illumination Precautions” for other important information.

To illuminate the face of the watch

In Timekeeping mode (except when a setting screen is on the display), press Bto illuminate the face of the watch.

•The above operation turns on illumination regardless of the current auto light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the face to illuminate, whenever you position your wrist as described below in any mode. Note that this watch features an “Auto LED Light,” so the auto light switch operates only when available light is below a certain level. It does not illuminate the face under bright light.

Moving the watch to a position that is parallel to the ground and then tilting it towards you at more than 40 degrees causes illumination to turn on.

•Wear the watch on the outside of your wrist.

Parallel to	More than
ground	40°

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