Casio 2566 User Manual

USER’S GUIDE 2566

About This Manual

• Button operations are indicated using the letters shown

(Light)

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.

General Guide

• Press B to change from mode to mode.

• In any mode, press L to illuminate the display.

Timekeeping Mode

Press .

World Time Mode Day Counter Mode Stopwatch ModeAlarm Mode

Timekeeping

Use the Timekeeping Mode to set and view the current time and date. You can also
select the color of the “Magical Illumination” backlight, which uses LEDs to illuminate
the display in different colors.

• In the Timekeeping Mode, press C to toggle the lower part of the display between
the date and world time.

Day of week

AM/PM
indicator

Important!

• World Time Mode times will not be correct unless you set the correct current date,
time, and city code in the Timekeeping Mode. See “To set the time and date” for
more information.

To set the time and date

3. When the setting you want to change is flashing, use C to change it as described

below.

Seconds
12/24-Hour Format

DST on/off

City code

Hour, Minutes, Year, Month, Day
Backlight color

• Pressing C while the seconds are in the range of 30 to 59 resets them to
and adds 1 to the minutes. In the range of 00 to 29, the minutes are unchanged.

•

For full information on city codes, see the “City Code Table”.

• See “To change the backlight color” for information about backlight color settings.

4. Press A to exit the setting screen.

• The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.

• 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 the A (AM) 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 also
applied in all other modes.

• The year can be set in the range of 2000 to 2039.

• The watch’s built-in full automatic calendar automatically 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.

Hour : Minutes

Press .

Month – Day Seconds City code type

1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.

2. Press B to move the flashing in the sequence shown
below to select other settings.

Seconds Hour

Backlight
color

To change this setting

12/24-Hour
Format

Press C to reset to 00.
Press C to toggle between 12-hour (12H) and 24-

hour (24H) timekeeping.
Press C to toggle between DST on (ON displayed)

and off (OFF displayed).
Use C to scroll through the available codes until the

one you want to use as your Home Time city is displayed.
Use C to increase the setting.
Use C to cycle through the available color settings.

World Time
Mode time
(Hour : Minutes)

DST
on/off

MonthDay

Perform this button operation

City
code

Year Minutes

indicator

00

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

DST indicator

To change the backlight color

Backlight color

For this type of backlight:

Ramdom selection among three gradation patterns
(Aurora, Sunset, Ocean)

Change to one of 12 different colors every hour.
Always use one of seven colors

SEL x1x : Juicy Red
SEL x2x :Tangerine Orange
SEL x3x : Natural
SEL x4x : Pure Green
SEL x5x : Aqua Blue
SEL x6x : Silky Violet
SEL x7x : Passion Pink

• In the case of TIM, the same color is used for corresponding AM and PM time.

3. Press A to exit the setting screen.

• A preset special backlight color pattern is used in place of the current backlight color
setting during December 24 and December 25 each year.

1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.

2. Press B twice to move the flashing to the DST On/Off
setting.

3. Press C to toggle between Daylight Saving Time (
displayed) and standard time (OFF displayed).

4. Press A to exit the setting screen.

• The DST indicator appears on the display when Daylight

Saving Time is turned on.

1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.

2. Press B nine times until the backlight color setting
screen appears, and then use C to cycle through the
available color settings as shown below.

RBW TIM

SEL SEL

x7x x1x

Select this setting:

RBW

TIM

SEL x1x through x7x

ON

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USER’S GUIDE 2566

World Time

Hour : Minutes

City code

Timekeeping
Mode time
(Hour : Minutes)

City code type indicator

To switch between Standard Time and Daylight Saving Time

In the World Time Mode, hold down A to toggle between Daylight Saving Time (DST
displayed) and Standard Time (DST not displayed).

• Note that the DST/Standard Time setting affects only the currently displayed city code.
Other city codes are not affected.

The World Time shows the current time in 40 cities
(27 time zones) around the world.

Seconds

• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing B.

To view the time in another city code

In the World Time Mode, press C to scroll city codes
(time zones).

• For full information on city codes, see the “City Code
Table”.

• If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City code settings
and make the necessary changes.

DST indicator

Hold down .

DST OFF DST ON

Day Counter

The Day Counter lets you count the number of days from the Timekeeping Mode’s
current date to a specific target date.

Year Month – Day DAYS indicator

• There are 10 Day Counter records (DC1through DC10), each of which can be set
with its own target date (year, month, and day).

• Whenever the date specified by any one of the Day Counters matches the date of
the Timekeeping Mode (regardless of the Day Counter’s year setting), the DAYS
indicator flashes in the Timekeeping Mode and Day Counter Mode screens.

• All of the operations in this section are performed in the Day Counter Mode, which
you enter by pressing B.

To create a new Day Counter record

4. While a setting is flashing, use C to increase the setting.

• You can set a target date in the range of January 1, 1940 to December 31, 2039.

5. Press A to exit the setting screen.

Note

• Use the above procedure to edit Day Counter records, too.

To recall Day Counter records

In the Day Counter Mode, use C to scroll through the Day Counter records.

Target date

1. In the Day Counter Mode, use C to scroll through the
Day Counter records until the one you want is on the
display.

2. Hold down A until the year starts to flash, which
indicates the setting screen.

3. Press B to move the flashing in the sequence shown
below.

Target date

Year DayMonth

Number of days

Alarm

Hourly time signal
on indicator

Alarm on indicator

City code

Timekeeping Mode time
(Hour : Minutes)

Alarm time (Hour : Minutes)

To set the alarm time

Alarm on indicator

City code

6. Press A to exit the setting screen.

• When setting the alarm time using the 12-hour format, take care to set the time
correctly as morning (A displayed) or afternoon (P displayed).

Alarm Operation

The alarm tone sounds at the preset time for about 20 seconds. The light flashes for
about 10 seconds.

• Pressing any button stops the alert operation (beep or light).

To test the alarm

In the Alarm Mode, hold down C to sound the alarm or flash the light alert.

• Note that pressing C to test the alarm also cycles through the Daily Alarm and
Hourly Time Signal settings described below.

To turn the Daily Alarm and Hourly Time Signal on and off

In the Alarm Mode, press C to cycle through the Daily Alarm and Hourly Time Signal
settings shown below.

• When the Hourly Time Signal is turned on (SIG displayed) and the display light alert
is on, a preset special hourly time signal pattern flashes on the display for about one
second every hour on the hour during December 24 and December 25 each year.

Alarm On Indicator / Hourly Time Signal On Indicator

Both ON Both OFF Daily Alarm

The alarm sounds at the preset time each day while the
Daily Alarm is turned on. When the Hourly Time Signal is
turned on, the watch beeps every hour on the hour.

• You can also set up the watch so the backlight flashes
to indicate an alarm and a Hourly Time Signal, instead
of beeping.

• You can configure the alarm so it sounds when the
alarm time setting matches the time either in your
current Home Time city or the city you specify in the
Alarm Mode.

• If the DST indicator is on the display in the Alarm Mode, it
means that Daylight Saving Time (summer time) is turned
on for the city that is specified in the Alarm Mode.

• Alarm settings (and Hourly Time Signal setting) are
available in the Alarm Mode, which you enter by
pressing B.

1. In the Alarm Mode, hold down A until the hour flashes

on the display, which indicates the setting screen.

• At this time, the alarm is turned on automatically.

2.

Press B to move the flashing in the sequence shown below.

Hour City codeMinutes

Beep/Light

3. While the hour or minute setting of the alarm time is

flashing, press C to increase it.

4. While the city code is flashing, press C to scroll city

codes (time zones).

5. While the Beep/Light setting is flashing, press C to

toggle between a beep alert (
light alert (

LT).

only

BEEP

) and a display

Hourly Time
Signal only

Stopwatch

Minutes

Hours

Seconds

1/100 second

To measure times with the stopwatch

Elapsed Time

Start

Split Time

Start

Two Finishes

The stopwatch lets you measure elapsed time, split times,
and two finishes.

• The display range of the stopwatch is 23 hours,

Split
indicator

59 minutes, 59.99 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.

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

• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing B.

Stop Re-start Stop Clear

Split

(

Split

indicator

displayed)

Split release Stop Clear

Start

Split Stop Split release Clear

First runner
finishes.
Display time of
first runner.

Second runner
finishes.

Display time of
second runner.

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