Casio 4398 World Time, Stopwatch, Alarm, Illumination, Reference, Alarm Operation, Illumination Precautions, Button Operation Tone, Auto Return Features, Scrolling

Operation Guide 4398

3. Use Dand B to adjust the analog setting as described below.

When you want to do this:	Perform this button operation:
Move the hand setting forward	• Press D.
20 seconds
Move the hand setting a short way	• Hold down D.
forward at high speed	• Release Dwhen the hands reach the setting you
	want.
Move the hand setting a long way	• While holding down Dto move the hands at high
forward at high speed	speed, press Bto lock the high-speed hand
	movement.
	• To stop the hand movement, press any button.
	• Hand movement stops automatically if the hour hand
	makes one full (12-hour) revolution or if a daily alarm
	or Hourly Time Signal starts to sound.

4. Press A to exit the setting screen.

•The watch will automatically adjust the minute hand slightly to match its internal second count when you exit the setting screen.

•To return to the Timekeeping Mode, press C.

World Time

To set an alarm time

1. In the Alarm Mode, hold down A until the hour setting of the alarm time starts to flash, which indicates the setting screen.

• This operation automatically turns on the alarm.

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

3. 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).

4.Press A to exit the setting screen.

Alarm Operation

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

•To stop the alarm tone after it starts to sound, press any button.

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

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

Current time for the selected city code

City code

World Time digitally displays the current time in 48 cities (29 time zones) around the world.

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

To view the time in another city

1.In the World Time Mode, press D to display the currently selected city code.

2.While the city code is displayed, press Dto scroll eastwardly through the city codes.

•The city code is displayed for about one second, and then it is replaced with the current time for that city code.

•For full information about city codes, see the “City Code Table”.

In the Alarm Mode, press Dto cycle through the settings shown below.

Dark figures on a light background

	Alarm On	Alarm Off	Alarm On	Alarm Off
	Signal On	Signal Off	Signal Off	Signal On
Light figures on a dark background

•If the current time shown for a city is wrong, it probably means there is a problem with your Timekeeping Mode time and/or Home City code settings. Go to the Timekeeping Mode and make the necessary adjustments.

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

1. In the World Time Mode, use Dto display the city code whose Standard Time/Daylight Saving Time setting you want to change.

2. Hold down Afor about one second to toggle between Daylight Saving Time (DST indicator displayed) and Standard Time (DST indicator not displayed).

DST indicator

•The DST indicator is on the display whenever you display a city code for which Daylight Saving Time is turned on.

•Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected.

•Note that you cannnot use the World Time Mode to change the DST setting of the Home City code you currently have selected in the Timekeeping Mode. See “To toggle the Timekeeping Mode digital time between DST and Standard Time” for information about turning the Home City code DST setting on and off.

Stopwatch

	1/100 second				The stopwatch lets you measure elapsed time.
					• The display range of the stopwatch is 59 minutes,
			Seconds		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.
					• All of the operations in this section are performed in the
					Stopwatch Mode, which you enter by pressing C.
		Minutes
To measure times with the stopwatch
Elapsed Time
Start				Stop		Re-start	Stop	Clear
Alarm
Alarm on indicator					When the alarm is turned on, the alarm tone sounds when
					the alarm time is reached.
					You can turn on an Hourly Time Signal that causes the
					watch to beep twice every hour on the hour.
					• All of the operations in this section are performed in the
					Alarm Mode, which you enter by pressing C.
Alarm time
(Hour : Minutes)

Alarm On	Alarm Off	Alarm On	Alarm Off
Signal On	Signal Off	Signal Off	Signal On

•The alarm on indicator and the Hourly Time Signal on indicator are shown on the display in all modes while these functions are turned on.

Illumination

Two LEDs (light-emitting diodes) illuminate the face of the watch for easy reading in the dark.

Illumination Precautions

• Illumination may be hard to see when viewed under direct sunlight.

• Illumination automatically turns off whenever an alarm sounds.

•Frequent use of illumination runs down the batteries.

To illuminate the face of the watch

In any mode (except when a setting screen is on the display), press Bto turn on illumination.

Reference

This section contains more detailed and technical information about watch operation. It also contains important precautions and notes about the various features and functions of this watch.

Button Operation Tone

MUTE indicator	The button operation tone sounds any time you press one
	of the watch’s buttons. You can turn the button operation
	tone on or off as desired.
	• Even if you turn off the button operation tone, the alarm,
	and Hourly Time Signal all operate normally.
	To turn the button operation tone on and off
	In any mode (except when a setting screen is on the
	display), hold down Cto toggle the button operation tone
	on (MUTE indicator not displayed) and off (MUTE
	indicator displayed).

•Since Cis also the mode change button, holding it down to turn the button operation tone on or off also causes the watch’s current mode to change.

•The MUTE indicator is displayed in all modes when the button operation tone is turned off.

Auto Return Features

•If you leave the watch in the Alarm Mode or Hand Setting Mode for two or three minutes without performing any operation, it automatically changes to the Timekeeping Mode.

•If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch automatically saves any settings you have made up to that point and exits the setting screen.

Scrolling

The Dand Bbuttons are used in various modes and setting screens to scroll through data on the display. In most cases, holding down these buttons during a scroll operation scrolls at high speed.

Initial Screens

When you enter the World Time, the data you were viewing when you last exited the mode appears first.

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