Casio 2428 User Manual

User’s guide 2428

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USER’S GUIDE 2428

1

• After you perform an operation in any mode, pressing B returns to the

Timekeeping Mode.

General Guide

The operational procedures for Modules 2428 and 2470 are identical. All of the
illustrations in this manual show Module 2428.
• Press B to change from mode to mode. Each mode is explained in detail on

the following pages.

[Module 2470]

[Module 2428]

Timekeeping Mode

Time Setting Mode

Stopwatch Mode

Alarm Mode

Press .

Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire
display to glow for easy reading in the dark.
• The electro-luminescent panel that provides illumination loses power after

very long use.

• The illumination provided by the backlight may be hard to see when viewed

under direct sunlight.

• The watch may emit an audible sound whenever the display is illuminated.

This is due to vibration of the EL panel used for illumination, and does not
indicate malfunction.

• Frequent use of the backlight shortens the battery life.

Timekeeping Mode

• In the Timekeeping Mode, press C to switch

between the 12-hour and 24-hour formats.

• In the Timekeeping Mode, press A to illuminate the

display for a few seconds.

• Day of the week is displayed as follows.

SU: Sunday

MO: Monday

TU: Tuesday

WE: Wednesday

TH: Thursday

F R : Friday

SA: Saturday

Day of the week

Day

Hour

PM indicator

Minutes

Seconds

Alarm Mode

When the Daily Alarm is switched on, the alarm
sounds for 20 seconds at the preset time each day.
When the Hourly Time Signal is switched on, the
watch beeps every hour on the hour.

To set the alarm time
1. Hold down A while in the Alarm Mode until the

hour digits start to flash on the display. The hour
digits flash because they are

selected.

2. Press A to change the selection in the following

sequence.

• Pressing A also illuminates the display.

Hour

Minutes

Normal Alarm Mode (No digit flashes)

• Once you reach the normal Alarm Mode, you have to hold down A again

until the hour digits start to flash.

3. Press C to increase the selected digits. Holding down C changes the

number at high speed.

• The format (12-hour and 24-hour) of the alarm time matches the format you

select for normal timekeeping.

• When setting the alarm time using the 12-hour format, take care to set the

time correctly as morning or afternoon (PM).

4. After you set the alarm time, press A to return to the Alarm Mode. At this

time the Daily Alarm is switched on automatically.

To stop the alarm
Press A to stop the alarm after it starts to sound.

Hourly time
signal on
indicator

Mode indicator

Hour

Alarm on
indicator

Minutes

To switch the Daily Alarm and Hourly Time Signal on and off
Press C while in the Alarm Mode to change the status of the Daily Alarm and
Hourly Time Signal in the following sequence.

[Alarm on Indicator/Hourly Time Signal on Indicator]

Hourly Time
Signal only

Daily Alarm
only

Both off

Both on

To test the alarm
Hold down C while in the Alarm Mode to sound the alarm.

Stopwatch Mode

The Stopwatch Mode lets you measure elapsed time,
split times, and two finishes. The range of the
stopwatch is 59 minutes, 59.99 seconds.

Mode Indicator

Split time
indicator

Minutes

Seconds

1/100 second

(a) Elapsed time measurement

Start

Stop

Re-start

Stop

Clear

Start

Split

Split release

Stop

Clear

Start

Split

Stop

Split release

Clear

(b) Split time measurement

(c) Split time and 1st-2nd place times

First runner
finishes.

Second runner
finishes.
Record time of
first runner.

Record time of
second runner.

Time Setting Mode

To set the time and date
1. Use B to enter the Time Setting Mode.
• The second’s digits flash because they are

selected.

2. Press A to change the selection in the following

sequence.

• Pressing A also illuminates the display.

Seconds

Hour

Minutes

Day of week

Day

Month

Day of the week

Day

Hour

Minutes

Seconds

PM indicator

3. While the second’s digits are selected (flashing), press C to reset the

seconds to “00”. If you press C while the second’s count is in the range of
30 to 59, the seconds are reset to “00” and 1 is added to the minutes. If the
second’s count is in the range of 00 to 29, the minute’s count is unchanged.

4. While any other digits (besides seconds) are selected (flashing), press C to

increase the number. While the day of the week is selected, pressing C
advances to the next day. Holding down C changes the current selection at
high speed.

5. After you set the time and date, press B to return to the Timekeeping Mode.
• If you do not operate any button for a few minutes while a selection is

flashing, the flashing stops and the watch goes back to the Timekeeping
Mode automatically.

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