Casio 3556 EN User manual

© 2023 CASIO COMPUTER CO., LTD.
MA2303-A
User’s Guide
Watch
3556 EN

Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is
designed, carefully read and follow the instructions in this manual, especially the
information under “Operating Precautions” and “User Maintenance”.

EN-1
About This Manual
•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.

EN-2
Contents
About This Manual................................................................................................ EN-1
Watch Features..................................................................................................... EN-6
Selecting a Mode.................................................................................................. EN-7
Timekeeping ......................................................................................................... EN-9
Stopwatch ........................................................................................................... EN-14
Preset Timer........................................................................................................ EN-19
Countdown Timer............................................................................................... EN-23
World Time .......................................................................................................... EN-30
Alarm ................................................................................................................... EN-32
Illumination.......................................................................................................... EN-35
Reference............................................................................................................ EN-36
Specifications ..................................................................................................... EN-42

EN-3
Operating Precautions....................................................................................... EN-45
User Maintenance .............................................................................................. EN-55

EN-4
Procedure Lookup
The following is a handy reference list of all the operational procedures contained in
this manual.
To set the time and date.................................................................................... EN-10
To toggle the Timekeeping Mode time between DST and Standard Time... EN-12
To toggle between 12-hour and 24-hour timekeeping ................................... EN-13
To measure times with the stopwatch............................................................. EN-15
To set the event time ......................................................................................... EN-17
To start timing at the beginning of an event ................................................... EN-17
To pause timing .................................................................................................. EN-18
To reset elapsed time measurement to zero................................................... EN-18
To perform a preset timer operation ................................................................ EN-20
To configure countdown timer settings........................................................... EN-24
To perform a countdown timer operation........................................................ EN-28
To view the time for another city code............................................................. EN-30

EN-5
To toggle a city code time
between Standard Time and Daylight Saving Time .................................... EN-31
To set the alarm time ......................................................................................... EN-32
To stop the alarm tone after it starts to sound .............................................. EN-33
To switch the Daily Alarm and Hourly Time Signal on and off....................... EN-34
To test the alarm ................................................................................................ EN-34
To illuminate the display.................................................................................... EN-35
To turn the button operation tone on and off ................................................. EN-38

EN-6
Watch Features
◆Stopwatch
◆Preset Timer
◆Countdown Timer
◆World Time
◆Alarm

EN-7
Selecting a Mode
•Press Cto change from mode to mode.
•In any mode (except when a setting screen is on the display), press Bto illuminate
the display.
C
Timekeeping Mode Stopwatch Mode Preset Timer Mode
C
C

EN-8
World Time ModeAlarm Mode
Countdown Timer
Mode
CC
C

EN-9
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date.
Read This Before You Set the Time and Date !
The times displayed in the Timekeeping Mode and World
Time Mode are linked. Because of this, make sure you
select a city code for your Home City (the city where you
normally use the watch) before you set the time and date.
•For full information on city codes, see the “City Code
Table” at the back of this manual.
Day of week
Second
Hour : Minute
PM indicator
Month – Day

EN-10
To set the time and date
1. In the Timekeeping Mode, hold down Auntil the
seconds start to flash, which indicates the setting
screen.
2. Press Cto move the flashing in the sequence shown
below to select other settings.
Second DST City Code Hour
C C C C
C
Day Month Year Minute
CCC

EN-11
3. When the setting you want to change is flashing, use Dand Bto 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 Use D(east) and B(west).
Change the hour or minute Use D(+) and B(–).
Change the year
Change the month or day
•See “Daylight Saving Time (DST)” on page EN-12 for details about the DST
setting.
4. Press Ato exit the setting screen.

EN-12
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.
To toggle the Timekeeping Mode time between DST and Standard Time
1. In the Timekeeping Mode, hold down Auntil the
seconds start to flash, which indicates the setting
screen.
2. Press Cto display the DST setting screen.
3. Press Dto toggle between Daylight Saving Time (On
displayed) and Standard Time (OFF displayed).
4. Press Ato exit the setting screen.
•The DST indicator is on the display while Daylight Saving
Time is turned on.
DST indicator

EN-13
To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press Dto toggle between 12-hour timekeeping and
24-hour timekeeping.
•With the 12-hour format, the P(PM) indicator appears 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.
•The Pindicator is not displayed with the Timekeeping Mode time on the Preset
Timer Mode, Countdown Timer Mode, World Time Mode, and Alarm Mode screens.

EN-14
Stopwatch
The stopwatch lets you measure elapsed time. The upper
display and lower display can be used for official timing of
an event or game.
•The measurement range of the upper display is
59minutes 59seconds.
•The measurement range of the lower display is
99minutes 59seconds.
•The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
•The stopwatch measurement operation continues even if
you exit the Stopwatch Mode.
•All of the operations in this section are performed in
the Stopwatch Mode, which you enter by pressing C
(page EN-7).
Timekeeping Mode time
Initial Stopwatch Mode
Screen

EN-15
•This time measurement (1/100 second)
cannot be paused.
Elapsed Time Screen
Minutes Seconds
•Press Dto pause and
resume elapsed time
measurement.
Minutes Seconds
•This time measurement
cannot be paused.
It shows the total elapsed
time since the timing
operation started.
To measure times with the stopwatch
Elapsed Time
DDDD Hold down A
Start Stop*1Resume Stop*1Reset
*1 Elapsed time measurement in the lower display continues.

EN-16
Using the Watch for Official Timing of a Sport Event
After you set a game or event time, the watch will sound an alarm when the time in
the lower display reaches that time.
If the event is interrupted for some reason, you can press Dto pause and resume
timing in the upper display. The lower display shows the total elapsed time since the
start of the timing operation. You can calculate the total amount of time that play was
interrupted (lost time or injury time) by subtracting the upper display time from the
lower display time.

EN-17
To set the event time
1. In the Stopwatch Mode, hold down Auntil the current
event time setting starts to flash in the lower display.
This is the setting screen.
•If the current event time is not displayed, use the
procedure under “To reset elapsed time measurement
to zero” (page EN-18) to display it.
2. While a setting is flashing, use D(+) and B(–) to
change it.
•You can set the event time in the range of 1 minute to
60 minutes, in 1-minute units.
•“- -” indicates there is no event time set.
3. Press Ato exit the setting screen.
To start timing at the beginning of an event
When the current time in the lower display reaches the event start time, press Dto
start timing.
•This will display elapsed time measurement in the upper and lower displays.

EN-18
To pause timing
1. Press D.
This stops elapsed time measurement in the upper display.
•Elapsed time measurement in the lower display continues.
2. To resume elapsed time measurement in the upper display, press Dagain.
When the preset event time is reached
•The watch will sound an alarm when the elapsed time measurement in the lower
display (total elapsed time since timing started) reaches the preset event time.
•Elapsed time measurement continues to be performed even after the preset event
time is reached.
To reset elapsed time measurement to zero
1. Press D. This stops elapsed time measurement in the upper display.
•Elapsed time measurement in the lower display continues.
2. Hold down Auntil the initial Stopwatch Mode screen appears.