MA1909-EA
© 2019 CASIO COMPUTER CO., LTD.
Operation Guide 3484
About This Manual
x Button operations are indicated using the letters
shown in the illustration.
x 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.
x To ensure that this watch provides you with the years
of service for which it is designed, be sure to carefully
read and follow the instructions under “Operating
Precautions” and “User Maintenance”.
x Be sure to keep all user documentation handy for
future reference.
E
Procedure Lookup
The following is a handy reference list of all the operational procedures contained in
this manual.
To toggle the Timekeeping Mode time between DST and Standard Time ...... E-12
To turn on illumination .......................................................................................... E-15
To view the time for another city code................................................................E-16
To toggle a city code time
between Standard Time and Daylight Saving Time .......................................E-17
To change your Home Time city to the current World Time city ......................E-18
To set an alarm time .............................................................................................E-20
To test the alarm ...................................................................................................E-22
To turn an alarm on and off .................................................................................. E-23
To turn the Hourly Time Signal on and off .......................................................... E-24
To configure the countdown timer ......................................................................E-26
To use the countdown timer ................................................................................E-27
E-2
General Guide
x Press C to change from mode to mode.
x In any mode (except when a setting screen is on the display), press B to
illuminate the display.
Timekeeping Mode World Time Mode
CC
Contents
General Guide .......................................................................................................... E-4
Timekeeping ............................................................................................................E-6
World Time .............................................................................................................E-16
Alarms.....................................................................................................................E-19
Countdown Timer .................................................................................................. E-25
Stopwatch ..............................................................................................................E-28
Reference ...............................................................................................................E-30
Specifications ........................................................................................................E-36
Operating Precautions ..........................................................................................E-38
User Maintenance .................................................................................................E-48
To measure times with the stopwatch ................................................................ E-29
To turn the button operation tone on and off ....................................................E-32
To turn off Auto Display ........................................................................................ E-35
To turn on Auto Display ........................................................................................E-35
Alarm Mode
Countdown Timer
C
Mode
Stopwatch Mode
C
E-1
E-3
E-4
Timekeeping
Graphic area B
Graphic area A
Day of week
Month – Day
Hour : Minutes
PM indicator
E-6
x You can change the current time setting for your Home City Time (T-1) only.
x For Local Times (T-2, T-3, T-4), you only can change the city code and DST
setting.
E-8
Seconds
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 T-4 are Local Times. Local Times are kept in
synchronization with your Home City Time (T-1).
x The graphic area B indicates the current Home City
Time (T-1). For details on reading the graphic areas,
see “Graphic Areas” (page E-30).
C
Switching Between Time Screens
Each press of D cycles the time screens in the sequence shown below.
Displayed for one second
A
DDD
x 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.
Changing the Current Home City Time and Date Settings
Seconds DST Minutes
C
Illumination Duration
Setting
4. When the setting you want to change is flashing, use D and B to change it as
described below.
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.
CC
C
Day
City Code
C
Month
C
C
Year
Hour
C
C
12/24-Hour
Format
E-5
D
E-7
C
E-9
Operation Guide 3484
Screen To do this: Do this:
Reset the seconds to 00
Toggle between Daylight Saving Time
(On) and Standard Time (OFF)
Change the city code
Change the hour or minutes
Toggle between 12-hour (12H) and 24hour (24H) timekeeping.
Change the year
Change the month or day
Toggle the setting between 1.5 seconds
(1) and 3 seconds (3)
x See “Daylight Saving Time (DST)” on page E-11 for details about DST setting.
E-10
To toggle the Timekeeping Mode time between DST and Standard Time
On/Off status
DST indicator
E-12
4. Press D to toggle between Daylight Saving Time (On displayed) and Standard
Time (OFF displayed).
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
make your Home City Time.
2. Press A and B at the same time.
x This makes the Local Time you selected in step 1 your new Home City Time.
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 (On
displayed) and Standard Time (OFF displayed).
5. Press A to exit the setting screen.
x The DST indicator appears on the Timekeeping screen
to indicate that Daylight Saving Time is turned on.
Press D.
Press D.
Use D (east) and B (west).
Use D (+) and B (–).
Press D.
Use D (+) and B (–).
Use D (+) and B (–).
Press D.
5. Press A to exit the setting screen.
x 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.
E-11
12/24-Hour Format
x With the 12-hour format, the P (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.
x With the 24-hour format, times are displayed in the range of 0:00 to 23:59,
without any indicator.
x 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.
E-13
Illumination
An LED (light-emitting diode) illuminate the display for easy reading in the dark.
Illumination Precautions
x The illumination provided by the light may be hard to see when viewed under
direct sunlight.
x Illumination automatically turns off whenever an alarm sounds.
x Frequent use of illumination runs down the battery.
To turn on illumination
In any mode (except when a setting screen is on the display), press B to turn on
illumination.
x When you press B, the illumination will remain on for about 1.5 seconds or
3seconds, depending on the current illumination duration setting (page E-9).
E-14
World Time
Current time and date
in the zone of the
selected city code
City code
E-16
To change your Home Time city to the current World Time city
1. In the World Time Mode, use D to display the city you want to make your new
Home Time city.
2. Press A and B at the same time.
x This makes the World Time city you selected in step 1 your new Home Time
city.
E-18
World Time shows the current time in 48 cities (31 time
zones) around the world.
x All of the operations in this section are performed in
the World Time Mode, which you enter by pressing C
(page E-4).
To view the time for another city code
In the World Time Mode, press D to scroll eastwardly
through city codes.
x For full information about city codes, see the “City
Code Table” at the back of this manual.
x If the current time for a city is wrong, check your
Timekeeping Mode time and time zone settings and
make the necessary changes.
To toggle a city code time between Standard Time and Daylight Saving Time
DST indicator
1. In the World Time Mode, use D (east) 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).
x The DST indicator is on the display whenever you
display a city code for which Daylight Saving Time is
turned on.
x Note that the DST/Standard Time setting affects only
the currently displayed city code. Other city codes are
not affected.
x Note that you cannot switch between Standard Time
and Daylight Saving Time while UTC is selected as
the city code.
Alarms
Your watch has a total of five alarms, each of which you
can configure as a daily alarm or one-time alarm.
x Daily Alarm: Sounds at the preset time each day.
x One-time Alarm: Sounds once at the preset time and
then is disabled automatically.
You can also turn on an Hourly Time Signal that causes
Alarm time
(Hour : Minutes)
Alarm number
the watch to beep twice every hour on the hour.
x All of the operations in this section are performed
in the Alarm Mode, which you enter by pressing C
(page E-5).
x Alarms operate in coordination with the current Home
City Time.
E-15
E-17
E-19
Operation Guide 3484
To set an alarm time
Alarm on indicator
2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash, which indicates the setting screen.
x This operation turns on the One-time Alarm automatically.
E-20
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in.
x Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
x 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.
E-22
To turn the Hourly Time Signal on and off
Hourly time signal
on indicator
1. In the Alarm Mode, use D to scroll through the alarm
screens until the alarm number you want to set is
displayed.
D
1. In the Alarm Mode, use D to select the Hourly Time
Signal.
2. Press A to toggle it on and off.
x The Hourly Time Signal on indicator is shown on the
display in all modes while this function is turned on.
D DD
–1 –2
:00
D D
–3
–5
–4
3. Press C to move the flashing in the sequence shown below to select other
settings.
Hour Minutes
One-time Alarm/Daily Alarm Selection
C
CC
4. While a setting is flashing, use D and B to change it as described below.
Screen To do this: Do this:
Change the hour and
minutes.
Toggle between One-time
/
Alarm and Daily Alarm.
Use D (+) and B (–).
x With the 12-hour format, set the time
correctly as a.m. or p.m. (P indicator).
Press D.
One-time Alarm on: 1-On
Daily Alarm on: On
5. Press A to exit the setting screen.
To turn an alarm on and off
1. In the Alarm Mode, use D to select an alarm.
2. Press A to cycle through the alarm settings as shown below.
AA
ALM OFF
Alarm Off One-Time Alarm On Daily Alarm On
x In all modes, the alarm on indicator is shown for the alarm that is currently
turned on.
x The alarm on indicator flashes while the alarm is sounding.
ALM 1-On
A
ALM On
Countdown Timer
1/10 second
Hours
Minutes
The countdown timer can be set within a range of
one second to 24 hours. An alarm sounds when the
countdown reaches zero.
x All of the operations in this section are performed
in the Countdown Timer Mode, which you enter by
pressing C (page E-5).
Seconds
E-21
E-23
E-24
To configure the countdown timer
3. When the setting you want to change is flashing, use D (+) and B (–) to change
the flashing item.
x To specify a countdown start time of 24 hours, set 0:00 00.
E-26
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the current
countdown start time starts to flash, which indicates the
setting screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
C
Hours Minutes Seconds
C
C
Stopwatch
1/100 second
Hours
Minutes
E-28
The stopwatch lets you measure elapsed time, split times,
and two finishes.
x The display range of the stopwatch is 23 hours,
59minutes, 59.99 seconds.
x The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
x The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
Seconds
x Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
x All of the operations in this section are performed in
the Stopwatch Mode, which you enter by pressing C
(page E-5).
4. Press A to exit the setting screen.
To use the countdown timer
Press D while in the Countdown Timer Mode to start the
countdown timer.
x When the end of the countdown is reached, the alarm
sounds for ten seconds or until you stop it by pressing
any button. The countdown time is reset to its starting
value automatically when the alarm sounds.
x Press D while a countdown operation is in progress
to pause it. Press D again to resume the countdown.
x To stop a countdown operation completely, first pause
it (by pressing D), and then press A. This returns the
countdown time to its starting value.
To measure times with the stopwatch
Elapsed Time
D
Start Stop Resume Stop Reset
D D D A
Split Time
D
Start Split
A A D A
(SPL displayed)
Split release Stop Reset
Two Finishes
D
Start Split
A D A A
First runner
finishes.
Display time of first
runner.
Stop
Second runner
finishes.
Split release
Display time of
second runner.
Reset
E-25
E-27
E-29
Operation Guide 3484
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.
Graphic Areas
There are two graphic areas named A and B.
Graphic area B
Graphic area A
E-30
To turn the button operation tone on and off
In any mode (except when a setting screen is on the display), hold down C to toggle
the button operation tone on (the mute indicator not displayed) and off (the mute
indicator displayed).
x Holding down C to turn the button operation tone on or off also causes the
watch’s current mode to change.
x The mute indicator is displayed in all modes when the button operation tone is
turned off.
Auto Return Features
x If you leave the watch in the Alarm Mode for two or three minutes without
performing any operation, it automatically changes to the Timekeeping Mode.
x If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting
screen.
E-32
World Time
x The seconds count of the World Time is synchronized with the seconds count of
the Timekeeping Mode.
x All World Time Mode times are calculated from the current Home City Time in
the Timekeeping Mode using UTC time offset values.
x The UTC offset is a value that indicates the time difference between a reference
point in Greenwich, England and the time zone where a city is located.
x The letters “UTC” is the abbreviation for “Coordinated Universal Time”,
which is the world-wide scientific standard of timekeeping. It is based upon
carefully maintained atomic (cesium) clocks that keep time accurately to within
microseconds. Leap seconds are added or subtracted as necessary to keep
UTC in sync with the Earth’s rotation.
Second hand
Minute hand
Hour hand
x Graphic area A: In the Timekeeping Mode and World Time Mode, segments
x Graphic area B: In all modes, segments indicate the current Home City Time
Button Operation Tone
Scrolling
The B and D buttons 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 or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
Timekeeping
x 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. In the range of 00 to 29, the seconds
are reset to 00 without changing the minutes.
x The year can be set in the range of 2000 to 2099.
x 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.
Auto Display
Auto Display continually changes the contents of the digital display.
To turn off Auto Display
Press any button to turn off Auto Display. This returns to the Timekeeping Mode.
To turn on Auto Display
In the Timekeeping Mode (page E-4), hold down D for about three seconds until
the watch beeps.
Note
x Auto Display cannot be performed while a setting screen is on the display.
indicate the current time (in units of 1 second). In the
Countdown Timer Mode and Stopwatch Mode, segments
indicate the ongoing timer measurement (in units of 1 second).
(T-1) hour, minute, and second.
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.
x Even if you turn off the button operation tone, the
alarms, the Hourly Time Signal, and the countdown
alarm all operate normally.
Mute indicator
E-31
E-33
E-34
Specifications
Accuracy at normal temperature: ±30 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Multi Time (one Home City Time and three Local Times); Daylight Saving
Time (summer time)/Standard Time
World Time: 48 cities (31 time zones) and Coordinated Universal Time
Other: Standard Time/Daylight Saving Time (summer time); Home Time City/
World Time City swapping
Alarms: 5 alarms (One-time or Daily), Hourly Time Signal
Countdown Timer
Measuring unit: 1/10 second
Input range: 1 second to 24 hours (1-second increments, 1-minute increments and
E-36
1-hour increments)
Stopwatch
Measuring unit: 1/100 second
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time, two finishes
Illumination: LED (light-emitting diode); Selectable illumination duration
Other: Button operation tone on/off; Auto Display function
Battery: One lithium battery (Type: CR2025)
Approximately 10 years on type CR2025; 10 seconds of alarm operation,
1.5 seconds of illumination per day
Frequent use of the light shortens the battery life.
Specifications are subject to change without notice.
City Code Table
E-35
E-37
L-1
Operation Guide 3484
City Code Table
City
Code
PPG Pago Pago –11
HNL Honolulu –10
ANC Anchorage –9
YVR Vancouver
LAX Los Angeles
YEA Edmonton
DEN Denver
MEX Mexico City
NYC New York –5
SCL Santiago
YHZ Halifax
YYT St. Johns –3.5
FEN
L-2
City
CHI Chicago
RIO Rio De Janeiro –3
Fernando de Noronha
UTC Offset/
GMT Differential
City
City
Code
–8
–7
–6
–4
–2
MAD Madrid
PAR Paris
ROM Rome
BER Berlin
STO Stockholm
ATH Athens
MOW Moscow
THR Tehran +3.5
City
RAI Praia –1
UTC
LON London
JRS Jerusalem
JED Jeddah
UTC Offset/
GMT Differential
0LIS Lisbon
+1
+2CAI Cairo
+3
Code
KTM Kathmandu +5.75
DAC Dhaka +6
RGN Yangon +6.5
BKK Bangkok +7
HKG Hong Kong
BJS Beijing
TPE Taipei
TYO Tokyo
ADL Adelaide +9.5
GUM Guam
SYD Sydney
City
DXB Dubai +4
KBL Kabul +4.5
KHI Karachi +5
DEL Delhi +5.5
SIN Singapore
SEL Seoul
UTC Offset/
GMT Differential
+8
+9
+10
City
Code
x Based on data as of July 2019.
x The rules governing global times
City
NOU Noumea +11
WLG Wellington +12
(UTC offset and GMT differential)
and summer time are determined by
each individual country.
UTC Offset/
GMT Differential
L-3
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