Casio 5398 Operation Manual Download Page 3

Operation Guide 5398

E-29

 Checking the Current Time in a Different Time Zone

You can use the World Time Mode to view the current 
time in one of 31 time zones (48 cities) around the globe. 
The city that is currently selected in the World Time 
Mode is called the “World Time City”.

 

 The hour and minute hands indicate information for the 
currently selected Home City.

 

 When you enter the World Time Mode, the currently 
selected city code and city name scroll once across 
the digital display. After that, the city code remains 
displayed. This same scrolling operation is also 
performed whenever you change the World Time City to 
a different city or when you press 

T

.

World Time City information

E-28

To use Auto-Start

1.  While the stopwatch screen is showing all zeros in 

the Stopwatch Mode, rotate the rotary switch to set 
the number of countdown seconds (or 

STW

 for no 

countdown).

2.  Press 

T

 to start the countdown.

 

 When the countdown reaches zero, a tone sounds 
and a stopwatch timing operation starts automatically.

 

 Pressing 

T

 while the Auto-Start countdown is in 

progress immediately starts the stopwatch.

Countdown seconds

E-27

Note

 

 The Stopwatch Mode can indicate elapsed time up to 23 hours, 59 minutes, 
59 seconds.

 

 Once started, stopwatch timing continues until you press 

T

 to stop it, even if 

you exit the Stopwatch Mode to another mode and even if timing reaches the 
stopwatch limit defi ned above.

 

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

Auto-Start

With Auto-Start, you can confi gure the stopwatch to perform a countdown and start 
elapsed time measurement automatically when the countdown reaches zero.

 

 Set a countdown length in the range of one to 60 seconds before using Auto-Start.

 

 Auto-Start is disabled automatically after the stopwatch elapsed time operation it 
started is complete.

 

 If you do not want to use a countdown, select 

STW

 for the countdown value.

 

 During the fi nal three seconds of the countdown, a beeper sounds with each 
second.

E-26

To perform an elapsed time operation

T

T

T

T

D

Start

Stop

(Resume)

(Stop)

Reset

To pause at a split time

T

D

D

T

D

Start

Split

(

SPL

 displayed)

Split release

Stop

Reset

To measure two fi nishes

T

D

T

D

D

Start

Split

(

SPL

 displayed)

First runner fi nishes.
Display time of fi rst 
runner.

Stop

Second runner 
fi nishes.

Split release

Display time of 
second runner.

Reset

E-25

  Using the Stopwatch

The stopwatch measures elapsed time, split times, and 
two fi nishes.

 

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

 To enter the Stopwatch Mode

Use 

C

 to select the Stopwatch Mode as shown on 

page E-10.

Seconds

Minutes

1/100 Second

Hours

E-24

Note

 

 Resetting the seconds to 00 while the current count is in the range of 30 to 59 
causes the minutes to be increased by 1.

 

 While the “Minute (and hour)” setting is selected above, the hour setting will change 
automatically whenever you move the minute setting past midnight.

 

 The watch’s built-in full automatic calendar makes allowances for different month 
lengths and leap years. Once you set the date, there should be no reason to 
change it except after you have the watch’s battery replaced.

 

 The day of the week changes automatically when the date changes.

E-23

3.  When the timekeeping setting you want to change is fl ashing, perform the 

operation described below.

Screen

To do this:

Do this:

Toggle between 12-hour (

12H

) and 24-hour 

(

24H

) timekeeping

Rotate the rotary switch.

Reset the seconds to 

00

Press 

D

.

Change the hour or minute

Rotate the rotary switch.

Change the year

Change the month or day

4.  Press 

A

 to exit the setting mode.

E-22

2.  Press 

C

 to move the fl ashing in the sequence shown below to select the other 

settings.

City Code 

(page E-18)

C

DST 

(page E-20)

C

12/24-Hour Format 

C

Seconds

C

C

Minute 

(and hour)

C

 Illumination Duration

(page E-41)

Hour 

(only)

C

C

 Button Operation Tone On/Off 

(page E-49) 

C

Month/Day

C

Year

E-21

 Adjusting the Digital Time and Date Settings

Use the procedure below to adjust the digital time and date settings.

 To confi gure the digital time and date settings

1.   In the Timekeeping Mode, hold down 

A

 until the 

fl ashing 

Hold

 indicator disappears from the display 

and the currently selected city code appears on the 
right side of the upper display.

 

 This indicates the city code setting mode.

E-20

 To change the Daylight Saving Time (summer time) setting

1.  In the Timekeeping Mode, hold down 

A

 until the 

fl ashing 

Hold

 indicator disappears from the display 

and the currently selected city code appears on the 
right side of the upper display.

 

 This indicates the city code setting mode.

2.  Press 

C

 to display the DST setting mode.

3.  Rotate the rotary switch to toggle between Daylight 

Saving Time (

ON

) and Standard Time (

OFF

).

 

 Note that you cannot switch between daylight saving 
time and standard time while UTC is selected as your 
Home City.

4.  After the setting is the way you want, press 

A

 to 

return to the Timekeeping Mode.

 

 The 

DST

 indicator appears to indicate that Daylight 

Saving Time is turned on.

DST indicator

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