Casio 5398 Operation Manual Download Page 4

Operation Guide 5398

E-39

Countdown in Progress

Display: TMR

Timer hand: 

 Indicates remaining time.
Rotates counterclockwise.

Countdown Complete

Display: OVER

Timer hand: 

 Indicates elapsed time.
Rotates clockwise.

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To confi gure the countdown timer

1.  Rotate the rotary switch to adjust the minutes setting.

 

 If a countdown timer operation is in progress, press 

T

 to stop it and then press 

D

 to reset to the current 

starting time.

 

 If a countdown timer operation is paused, press 

D

 to 

reset to the current starting time.

 To perform a countdown timer operation

T

T

T

T

D

Start

Stop

(Resume)

(Stop)

Reset

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 Countdown Timer

The countdown timer can be set within a range of 
one minute to 60 minutes. An alarm sounds when 
the countdown reaches zero. When the end of the 
countdown is reached, the timer starts to count up and 
continues timing up to 60 minutes.

To enter the Countdown Timer Mode

Use 

C

 to select the Countdown Timer Mode as shown 

on page E-11.

Minutes

Timer hand

Seconds

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

 In the Alarm Mode, rotate the rotary switch to select an 
alarm or the Hourly Time Signal.

 

 When the alarm you want or the Hourly Time Signal 
is displayed, press 

T

 to toggle it between on 

(“

” displayed) and off (“

” displayed).

 

 The alarm on indicator (when any alarm is on), snooze 
alarm indicator (when the snooze alarm is on), and the 
Hourly Time Signal on indicator (when the Hourly Time 
Signal is on) are shown on the display in all modes.

To stop the alarm

Press any button.

 Hourly time signal 
on indicator

 Snooze alarm on indicator

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2.  Hold down 

A

 for about two seconds until the alarm time starts to fl ash. This is 

the setting mode.

3.  Press 

C

 to move the fl ashing to the setting you want to change.

 

 When both the hour and minute setting is fl ashing: the hour setting will change 
automatically as you change the minute setting in the next step.

 

 When just the hour setting is fl ashing: just the hour setting will change in the 
next step.

4.  Rotate the rotary switch to change the currently fl ashing setting.

 

 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).

5.  Press 

A

 to exit the setting mode.

To test the alarm

In the Alarm Mode, hold down 

T

 to sound the alarm.

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To enter the Alarm Mode

Use 

C

 to select the Alarm Mode as shown on page E-11.

 

 The snooze alarm screen is indicated by 

SNZ

, while the other alarm screens are 

numbered 

AL1

 through 

AL4

. The Hourly Time Signal screen is indicated by 

SIG

.

 

 When you enter the Alarm Mode, the data you were viewing when you last exited 
the mode appears fi rst.

 To set an alarm time

1.  In the Alarm Mode, rotate the rotary switch to scroll 

through the alarm screens until the one whose setting 
you want to change is displayed.

AL1

AL3

AL2

SNZ

SIG

AL4

 Alarm indicator

Alarm ON/OFF indicator

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  Using the Alarm

You can set fi ve independent daily alarms. When a daily 
alarm is turned on, an alarm tone will sound for about 
10 seconds each day when the time in the Timekeeping 
Mode reaches the preset alarm time. One of the alarms 
is a snooze alarm, while the other four are one-time 
alarms. The snooze alarm operation will repeat every fi ve 
minutes, up to seven times.
You can also turn on an Hourly Time Signal, which will 
cause the watch to beep twice every hour on the hour.

Alarm number

Alarm time (Hour : Minute)

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To swap your Home City and World Time City

In the World Time Mode, hold down 

T

 for at least three seconds.

This will swap your Home City and World Time City.

Example:  To swap the Home City (TYO) and World Time City (NYC)

T

, at least 3 seconds

World Time City (NYC) time

New World Time City (TYO)

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 To specify standard time or daylight saving time (DST) for a city

1.  In the World Time Mode, rotate the rotary switch to 

display the city code (time zone) whose Standard 
Time/Daylight Saving Time setting you want to change.

2.  Hold down 

A

 for about two seconds.

 

 This toggles the city code you selected in step 1 
between Daylight Saving Time (

DST

 indicator 

displayed) and standard time (

DST

 indicator not 

displayed).

 

 Note that you cannot switch between standard time/
daylight saving time (DST) while 

UTC

 is selected as 

the World Time City.

 

 The standard time/daylight saving time (DST) setting 
affects only the currently displayed city. Other cities 
are not affected.

DST indicator

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To enter the World Time Mode

Use 

C

 to select the World Time Mode as shown on page E-11.

To view the time in another time zone

In the World Time Mode, rotate the rotary switch to change the city code setting.

 

 To display the UTC city code (differential 0), hold down 

D

.

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