Casio 3458 User Manual
MO1709-EA © 2017 CASIO COMPUTER CO., LTD.
Operation Guide 3458
About This Manual
• Depending on the model of your watch, digital display
text appears either as dark figures on a light
background, or light figures on a dark background. All
examples in this manual are shown using dark figures
on a light background.
• Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
E-1
• Note that the product illustrations in this manual are intended for reference only,
and so the actual product may appear somewhat different than depicted by an
illustration.
E-2
Alarms ……………………………………………………………………………………E-21
To set an alarm time ……………………………………………………………E-22
To test the alarm ………………………………………………………………E-24
To turn an alarm on and off ……………………………………………………E-25
To turn the Hourly Time Signal on and off ……………………………………E-26
Countdown Timer………………………………………………………………………E-27
To configure the countdown timer ……………………………………………E-28
To use the countdown timer ……………………………………………………E-29
Stopwatch ………………………………………………………………………………E-30
To measure times with the stopwatch ………………………………………E-31
Reference ………………………………………………………………………………E-32
To turn the button operation tone on and off …………………………………E-34
To turn off Auto Display ………………………………………………………E-37
To turn on Auto Display ………………………………………………………E-37
E-4
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
Timekeeping Mode World Time Mode
Contents
About This Manual …………………………………………………………………… E-1
General Guide ………………………………………………………………………… E-6
Timekeeping …………………………………………………………………………… E-8
To toggle the Timekeeping Mode time between DST and
Standard Time ………………………………………………………………E-14
To turn on illumination …………………………………………………………E-17
World Time ………………………………………………………………………………E-18
To view the time for another city code ………………………………………E-18
To toggle a city code time between Standard Time and
Daylight Saving Time ………………………………………………………E-19
To change your Home Time city to the current World Time city …………E-20
Specifications …………………………………………………………………………E-38
Alarm Mode Countdown Timer
Mode
Stopwatch Mode
E-3
E-5
E-6
Timekeeping
PM indicator
Digital dial
Map
Month – Day
Day of week
Hour : Minutes
E-8
Press C.
The Timekeeping Mode’s Multi Time feature gives you
quick and easy access to the current time and date in four
different cities, numbered from T-1 (Time 1) through T-4
(Time 4). T-1 is your Home City Time, and T-2, T-3, and
Seconds
T-4 are Local Times. Local Times are kept in
synchronization with your Home City Time (T-1).
• The digital dial at the top of the screen indicates the
current Home City Time (T-1). For details on reading the
map and digital dial, see “Map and Digital Dial” (page
E-32).
Switching Between Time Screens
Each press of D cycles the time screens in the sequence shown below.
DDD
A
Displayed for one second.
D
E-7
E-9
Operation Guide 3458
l
l
l
l
l
l
l
l
l
l
l
l
• While the Home City Time (T-1) screen is displayed, pressing A will switch the day
of the week / month-day indication to the currently selected Home City code and
the T-1 indicator for about one second.
• You can change the current time setting for your Home City Time (T-1) only.
• For Local Times (T-2, T-3, T-4), you can change the city code and DST settings
only.
E-10
Screen To do this: Do this:
Reset the seconds to . Press D.
Toggle between Daylight Saving Time ( ) and
Standard Time ( ).
Change the city code. Use D (east) and B (west).
Change the hour or minutes. Use D (+) and B (–).
Toggle between 12-hour ( ) and 24-hour ( )
timekeeping.
Change the year. Use D (+) and B (–).
Change the month or day. Use D (+) and B (–).
Toggle the setting between 1.5 seconds ( ) and
3 seconds ( ).
• See “Daylight Saving Time (DST)” on page E-13 for details about DST setting.
E-12
To toggle the Timekeeping Mode time between DST and Standard Time
DST indicator
1. Use D to display the current Home City Time (T-1)
screen.
2. Hold down A until the seconds start to flash, which
indicates the setting screen.
3. Press C to display the DST setting screen.
4. Press D to toggle between Daylight Saving Time
(
displayed) and Standard Time ( displayed).
5. Press A to exit the setting screen.
DST
• The
indicator appears on the Timekeeping
screen to indicate that Daylight Saving Time is turned
on.
Press D.
Press D.
Press D.
Changing the Current Home City Time and Date Settings
Seconds Minutes
Illumination
Duration Setting
4. When the setting you want to change is flashing, use D and B to change it as
described below.
5. Press A to exit the setting screen.
• The day of the week is displayed automatically in accordance with the date
(year, month, and day) settings.
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.
12/24-Hour Format
• With the 12-hour format, the PM indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and no indicator appears to the left of the
hour digits for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
Changing the City Setting of a Local Time
You can select any one of the city codes in the table at the back of this manual as a
Local Time city.
1. Display the Local Time whose city setting you want to change, and then hold down
A
for about two seconds until the current city code starts to flash.
2. Use D (east) and B (west) to select the city code you want.
3. Press C to display the DST setting screen.
1. Use D to display the current Home City Time (T-1)
screen.
2. Hold down A until the seconds start to flash, which
indicates the setting screen.
3. Press C to move the flashing in the sequence shown
below to select other settings.
City CodeDST Hour
12/24-Hour
YearMonthDay
Format
E-11
E-13
E-14
4. Press D to toggle between Daylight Saving Time ( displayed) and Standard
5. After the settings are the way you want, press A.
Changing Your Home City Time
Use the following procedure to change your current Home City Time to any one of the
three Local Times.
1. In the Timekeeping Mode, press D to display the Local Time which you want to
2. Press A and B at the same time.
E-16
displayed).
Time (
make your Home City Time.
• This makes the Local Time you selected in step 1 your new Home City Time.
World Time
City code
Current time and date in
the zone of the selected
city code
E-18
World Time shows the current time in 48 cities (31 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
(page E-6).
To view the time for another city code
In the World Time Mode, press D to scroll eastwardly
through city codes, or B to scroll westwardly.
• For full information about city codes, see the “City Code
Table” at the back of this manual.
• If the current time for a city is wrong, check your
Timekeeping Mode time and time zone settings and
make the necessary changes.
E-15
Illumination
An LED (light-emitting diode) illuminates the display for easy reading in the dark.
Illumination Precautions
• The illumination provided by the light 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 battery.
To turn on illumination
In any mode, press L to turn on illumination.
• You can use the procedure above to select either 1.5 seconds or 3 seconds as the
illumination duration. When you press L, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current illumination duration setting.
E-17
To toggle a city code time between Standard Time and Daylight Saving Time
DST indicator
1. In the World Time Mode, use D (east) or B (west) to
display the city code (time zone) whose Standard Time/
Daylight Saving Time setting you want to change.
2. Hold down A for about one second to toggle Daylight
Saving Time (DST displayed) and Standard Time (DST
not displayed).
DST
• The
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 cannot switch between Standard Time
and Daylight Saving Time while UTC is selected as
the city code.
E-19
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