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USER’S GUIDE 2453/2642

1

MA0212-A

About This Manual

The operational procedures for Modules 2453 and 2642
are identical. All of the illustrations in this manual show
Module 2453.

Button operations are indicated using the letters shown
in the illustration.

These watches are equipped with two color LCD panels.
For the sake of simplicity, the screen shots in this
manual are shown using only one color.

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.

Module 2453

Module 2642

General Guide

Press 

C

 to change from mode to mode.

In any mode, press 

L

 to illuminate the display.

Timekeeping Mode

Telememo Mode

Alarm Mode

Stopwatch Mode

Countdown Timer Mode

Dual Time Mode

Press .

Timekeeping

Use the Timekeeping Mode to set and view the current
time and date. You also use the Timekeeping Mode to
select the display color pattern.

To set the time and date

1. In the Timekeeping Mode, hold down 

A

 until the

seconds start to flash, which indicates the setting
screen.

2. Press 

C

 to move the flashing in the sequence shown

below to select other settings.

Hour

Minutes

Seconds

DST

Month

Year

Day

Color Pattern

Day of week

Month – Day

PM indicator

Hour : Minutes  Seconds

3. When the setting you want to change is flashing, use 

D

 and 

B

 to change it as

described below.

Pressing 

D

 while the seconds are in the range of 30 to 59 resets them to 

00

 and

adds 1 to the minutes. In the range of 00 to 29, the minutes are unchanged.

See “Daylight Saving Time (DST)” for details on DST setting.

See “Color Pattern Setting” for details about the color pattern setting.

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.

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

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.

To toggle between 12-hour and 24-hour timekeeping

In the Timekeeping Mode, press 

D

 to toggle between 12-hour timekeeping (indicated

by 

A

 or 

P

 on the display), or 24-hour timekeeping.

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
applied in all modes.

To change this setting

Seconds

DST

Hour, Minutes, Year,
Month, Day

Color Pattern

Perform this button operation

Press 

D

 to reset to 

00

.

Press 

D

 to toggle between Daylight Saving Time (

) and

standard time (

).

Use 

D

 (+) and 

B

 (–) to change the setting.

Use 

D

 and 

B

 to change the color pattern setting.

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 

A

 until the

seconds start to flash, which indicates the setting
screen.

2. Press 

C

 once to display the DST setting screen, which

is indicated by a flashing 

 (DST on) or 

 (DST

off) indicator.

3. Press 

D

 to toggle between Daylight Saving Time (

displayed) and standard time (

 displayed).

4. Press 

A

 to exit the setting screen.

The 

DST 

indicator appears on the display to indicate

that daylight saving time is turned on.

Color Pattern Setting

This watch is equipped with two color LCD panels, which provide a choice of
12 different color patterns from which you can choose.

To change the color pattern setting

1. In the Timekeeping Mode, hold down 

A

 until the

seconds start to flash, which indicates the setting
screen.

2. Use 

C

 to cycle through the available setting screens

until the color pattern setting screen (indicated by the
flashing 

 indicator) is on the display.

3. Use 

B

 and 

D

 to select the color pattern you want.

4. Press 

A

 to exit the setting screen.

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