CASIO 3551 Digital Watch User Guide
- June 11, 2024
- Casio
Table of Contents
3551 Digital Watch
Product Information
The product is a Casio watch with the model number MA2212-EA and
the operation guide number 3551. The watch features include Multi
Time, World Time, Alarm, Timer, and Stopwatch. The watch has a
Timekeeping Mode, World Time Mode, Alarm Mode, Timer Mode, and
Stopwatch Mode. The watch allows you to toggle the time between DST
and Standard Time, turn on illumination, view the time for another
city code, and toggle a city code time. The watch also has a handy
reference list of all the operational procedures contained in the
manual.
Product Usage Instructions
To use the watch, follow the below instructions:
-
Selecting a Mode: Press C to change from mode to mode. In any
mode (except when a setting screen is on the display), press B to
illuminate the display. -
Timekeeping: 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). The graphic area A at the top of the screen indicates the
current Home City Time (T-1). Switch between time screens by
pressing D. Use A to 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. Change the current time setting for
your Home City Time (T-1) only. For Local Times (T-2, T-3, T-4),
you can only change the city code and DST setting. -
World Time: In World Time Mode, use D to select the city code
you want to view. Press A to toggle between the Home City Time and
the selected city code time. -
Alarm: In Alarm Mode, press D to cycle through the alarm
screens. Hold down A until the hour digits start to flash, which
indicates the alarm setting screen. Press C to move the flashing in
the sequence shown below to select the other settings. Use D and B
to change the settings. -
Timer: In Timer Mode, hold down A until the minute digits start
to flash, which indicates the timer setting screen. Press C to move
the flashing in the sequence shown below to select other settings.
Use D and B to change the settings. -
Stopwatch: In Stopwatch Mode, press D to start and stop the
stopwatch. Hold down D to reset the stopwatch.
MA2212-EA
© 2023 CASIO COMPUTER CO., LTD.
Operation Guide 3551
You can also find information about operational procedures at the CASIO
website.
https://s.casio.jp/mw/en/3551/
ENGLISH
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.
EN-2
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… EN-18 To
turn on illumination ………………………………………………………………………….. EN-21 To view the time for
another city code …………………………………………………… EN-22 To toggle a city code time
between Standard Time and Daylight Saving Time ……………………………… EN-23 To change
your Home Time city to the current World Time city………………. EN-24 To set an
alarm time ……………………………………………………………………………… EN-26 To test the alarm
………………………………………………………………………………….. EN-29 To turn an alarm on and off
…………………………………………………………………… EN-30 To turn the Hourly Time Signal on and
off………………………………………………. EN-31 To configure the countdown timer
…………………………………………………………. EN-33
EN-4
Watch Features
Multi Time World Time Alarm Timer Stopwatch
You can also find information about operational procedures at the CASIO website.
EN-1
Contents
About This Manual…………………………………………………………………………………… EN-2 Watch
Features……………………………………………………………………………………….. EN-6 Selecting a
Mode…………………………………………………………………………………….. EN-8 Timekeeping
…………………………………………………………………………………………. EN-11 World Time
……………………………………………………………………………………………. EN-22 Alarm
……………………………………………………………………………………………………. EN-25
Timer…………………………………………………………………………………………………….. EN-32 Stopwatch
…………………………………………………………………………………………….. EN-35 Reference
…………………………………………………………………………………………….. EN-37 Specifications
……………………………………………………………………………………….. EN-43
EN-3
To use the countdown timer ………………………………………………………………….. EN-34 To measure times
with the stopwatch……………………………………………………. EN-36 To turn the button operation
tone on and off …………………………………………. EN-39 To turn off Auto
Display…………………………………………………………………………. EN-42 To turn on Auto Display
…………………………………………………………………………. EN-42
EN-5
EN-6
https://s.casio.jp/mw/en/3551/
Selecting a Mode
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
C
C
EN-8
EN-7
Alarm Mode
Timer Mode
Stopwatch Mode
C
C
C EN-9
Operation Guide 3551
You can also find information about operational procedures at the CASIO
website.
https://s.casio.jp/mw/en/3551/
Timekeeping
Graphic area A Day of week
Graphic area B Month Day
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 A at the top of the screen indicates the current Home City
Time (T-1). For details on reading the graphic areas, see “Graphic Areas”
(page EN-37).
EN-10
Switching Between Time Screens Each press of D cycles the time screens in the sequence shown below.
A Displayed for one second
D
D
D
D EN-12
Changing the Current Home City Time and Date Settings
1. Use D to display the current Home City Time (T-1) screen.
2. Hold down A until the second starts to flash, which indicates the setting
screen.
PM indicator
Second
Hour : Minute
EN-11
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.
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.
EN-13
3. Press C to move the flashing in the sequence shown below to select other settings.
C
C
C
Second
DST
City Code
Hour
C
C
Illumination Duration Setting
Minute
C
C
Day
Month
Year
12/24-Hour Format
C
C
C
EN-14
4. When the setting you want to change is flashing, use D and B to change it as described below.
Screen
To do this:
Do this:
Reset the second to 00.
Press D.
Toggle between Daylight Saving Time (On) and Standard Time (OFF).
Change the city code.
Press D.
Use D (east) and B (west).
Change the hour or minute.
Use D (+) and B ().
Toggle between 12-hour (12H) and 24-hour (24H) timekeeping.
Press D.
Change the year.
Use D (+) and B ().
EN-16
To toggle the Timekeeping Mode time between DST and Standard Time
1. Use D to display the current Home City Time (T-1)
screen.
2. Hold down A until the second starts 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.
DST indicator
x The DST indicator appears on the Timekeeping screen to
indicate that Daylight Saving Time is turned on.
EN-18
EN-15
Screen
To do this: Change the month or day.
Do this: Use D (+) and B ().
Toggle the setting between 1.5 seconds (1) and 3 seconds (3).
Press D.
x See “Daylight Saving Time (DST)” on page EN-17 for details about DST
setting. 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.
EN-17
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 at least 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. 4. Press D to toggle between Daylight Saving Time (On
displayed) and Standard
Time (OFF displayed).
EN-19
Operation Guide 3551
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.
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.
EN-20
World Time
City code
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 EN-8).
Current time and date in the zone of the selected city code
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.
EN-22
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.
EN-24
To set an alarm time
1. In the Alarm Mode, use D to scroll through the alarm screens until the alarm number you want to set is displayed.
D
D
1
2
3
D
D
:00
5
4
D
D
To turn on illumination In any mode (except when a setting screen is on the
display), press B to turn on illumination.
x You can use the procedure above to select either 1.5 seconds or 3 seconds as
the illumination duration. When you press B, the illumination will remain on
for about 1.5 seconds or 3 seconds, depending on the current illumination
duration setting.
EN-21
To toggle a city code time between Standard Time and Daylight Saving Time
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 at least two seconds 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
DST indicator
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.
EN-23
Alarm
Alarm number Alarm time (Hour : Minute)
Alarm on indicator
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 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 EN-9).
x Alarms operate in coordination with the current Home City Time.
EN-25
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. 3. Press C to move
the flashing in the sequence shown below to select other
settings.
Hour
C Minute
C
C
One-time Alarm/Daily Alarm Selection
EN-26
4. While a setting is flashing, use D and B to change it as described below.
Screen
/
To do this:
Change the hour and minute.
Toggle between One-time Alarm and Daily Alarm.
Do this:
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.
EN-27
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.
EN-28
EN-29
Operation Guide 3551
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.
Alarm on indicator
A
A
A
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.
EN-30
Timer
1/10 second
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 Timer Mode, which
you enter by pressing C (page EN-9).
Hours
Seconds
Minutes
EN-32
To use the countdown timer Press D while in the 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.
EN-34
To measure times with the stopwatch
Elapsed Time D Start
D Stop
D Re-start
Split Time D Start
A
Split (SPL displayed)
A Split release
Two Finishes D Start
EN-36
A
D
Split
Stop
First runner
Second runner
finishes. Display finishes.
time of first runner.
D Stop
D Stop
A Split release Display time of second runner.
A Clear
A Clear
A Clear
x Graphic area A: In all modes, segments indicate the current Home City Time
(T-1) hour, minute, and second.
x Graphic area B: In the Timekeeping Mode and World Time Mode, segments
indicate the current time (in units of 1 second). In the Timer Mode and
Stopwatch Mode, segments indicate the ongoing timer measurement (in units of
1/10 second).
Button Operation Tone
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.
EN-38
Mute indicator
To turn the Hourly Time Signal on and off 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.
Hourly time signal on indicator
EN-31
To configure the countdown timer
1. While the countdown start time is on the display in the 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.
Hours
C
C
Minutes
Seconds
C
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.
4. Press A to exit the setting screen.
EN-33
Stopwatch
1/100 second
Hours
Seconds
Minutes
The stopwatch lets you measure elapsed time, split times, and two finishes.
x The display range of the stopwatch is 23 hours, 59 minutes, 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.
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 EN-9).
EN-35
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.
Hour hand Minute hand
Graphic area A Second hand
Graphic area B
EN-37
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.
EN-39
Operation Guide 3551
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.
EN-40
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 EN-8), hold down D for
at least three seconds until the watch beeps. Note x Auto Display cannot be
performed while a setting screen is on the display.
EN-42
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: CR1616)
Approximately 3 years on type CR1616; 10 seconds of alarm operation, 1.5
seconds of illumination per day
Specifications are subject to change without notice.
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.
EN-41
Specifications
Accuracy at normal temperature: ±30 seconds a month Timekeeping: Hour, minute,
second, 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 Timer
Measuring unit: 1/10 second Input range: 1 second to 24 hours (1-second
increments, 1-minute increments and
1-hour increments)
EN-43
City Code Table
EN-44
City Code Table
City Code
City
UTC offset/ GMT Differential
PPG Pago Pago
11
HNL
Honolulu
10
ANC Anchorage
9
YVR Vancouver LAX Los Angeles
8
YEA DEN
Edmonton Denver
7
MEX Mexico City
CHI
Chicago
6
NYC New York
5
SCL YHZ
Santiago Halifax
4
YYT
St. Johns
3.5
RIO Rio De Janeiro
3
FEN Fernando de Noronha
2
L-2
City Code RAI UTC
LIS LON MAD PAR ROM BER STO ATH CAI JRS MOW JED THR
City
Praia
Lisbon London Madrid
Paris Rome Berlin Stockholm Athens Cairo Jerusalem Moscow Jeddah Tehran
UTC offset/ GMT Differential
1 0
+1
+2 +3 +3.5
L-1
City Code DXB KBL KHI DEL KTM DAC RGN BKK SIN HKG BJS TPE SEL TYO ADL
City
Dubai Kabul Karachi Delhi Kathmandu Dhaka Yangon Bangkok Singapore Hong Kong
Beijing Taipei Seoul Tokyo Adelaide
UTC offset/ GMT Differential
+4 +4.5 +5 +5.5 +5.75 +6 +6.5 +7
+8
+9
+9.5
City Code GUM SYD NOU WLG
City
Guam Sydney Noumea Wellington
UTC offset/ GMT Differential
+10
+11 +12
x Based on data as of July 2022. x The rules governing global times
(UTC offset and GMT differential) and summer time are determined by each
individual country.
L-3
References
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