Casio 2481 User Manual
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USER’S GUIDE 2481

General Guide

Press C to change from mode to mode.

In any mode, press B to illuminate the display.

Timekeeping Mode

Alarm Mode

Press .

Timekeeping

Hour : Minutes Seconds

Month – Day

Day of week

PM indicator

Use the Timekeeping Mode to set and view the current time and date.

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 Cto move the flashing in the sequence shown below to select other settings.

 

 

Seconds

 

 

 

Hour

 

 

 

Minutes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Day

 

 

 

Month

 

 

 

Year

 

 

 

 

 

 

 

 

 

 

 

 

3.When the setting you want to change is flashing, press D to change it as described below.

To change this setting

Perform this button operation

Seconds

Press D to reset to 00.

Hour, Minutes, Year, Month, Day

Press Dto increase the setting.

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.

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 2099.

The watch’s built-infull 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.

To toggle between 12-hourand24-hourtimekeeping

In the Timekeeping Mode, press D to toggle between 12-hourtimekeeping and24-hourtimekeeping.

With the 12-hourformat, theP (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.

With the 24-hourformat, times are displayed in the range of 0:00 to 23:59, without any indicator.

The 12-hour/24-hourtimekeeping format you select in the Timekeeping Mode is applied in all other modes.

Alarm

Hour : Minutes

Month – Day

Alarm Types

The multi-functionalarm lets you specify the hour, minutes, month, and day for the alarm . You can set up the alarm so it sounds once when the alarm time is reached, or for a snooze alarm that repeats up to seven times, every five minutes.

You can also turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

Pressing D in the Alarm Mode toggles between the alarm screen (Alarm time displayed) and the Hourly Time Signal screen (:00 displayed).

An alarm setting (and an Hourly Time Signal

setting) is available in the Alarm Mode, which you enter by pressing C.

The alarm type is determined by the settings you make, as described below.

Daily alarm

Set the hour and minutes for the alarm time. This type of setting causes the alarm to sound everyday at the time you set.

Date alarm

Set the month, day, hour and minutes for the alarm time. This type of setting causes the alarm to sound at the specific time, on the specific date you set.

1-Monthalarm

Set the month, hour and minutes for the alarm time. This type of setting causes the alarm to sound everyday at time you set, only during the month you set.

Monthly alarm

Set the day, hour and minutes for the alarm time. This type of setting causes the alarm to sound every month at time you set, on the day you set.

In any mode, hold down C for about two seconds to return to the Timekeeping Mode.

Countdown Timer Mode

Stopwatch Mode

 

Dual Time Mode

 

 

 

 

 

To set an alarm time

1. In the Alarm Mode, press Dto display the alarm screen.

2. Hold down A until the hour setting of the alarm

time starts to flash, which indicates the setting

screen.

This operation automatically turns on the single

alarm.

3. Press Cto move the flashing in the sequence shown below to select other settings.

HourMinutesMonthDay

4.While a setting is flashing, press D to increase it.

To set an alarm that does not include a month (Daily alarm, Monthly alarm), set x for the month. Press Duntil thex mark appears (between 12 and 1) while month setting is flashing.

To set an alarm that does not include a day (Daily alarm, 1-Monthalarm), setxx for the day. Press D until thexx mark appears (between the end of the month and 1) while the day setting is flashing.

When setting the alarm time using the 12-hourformat, take care to set the time correctly as a.m. or p.m. (P indicator).

5.Press Ato exit the setting screen.

Alarm Operation

The alarm tone sounds at the preset time for about 10 seconds. In the case of the snooze alarm, the alarm repeats up to seven times every five minutes.

Pressing any button stops the alarm tone operation.

The alarm and the Hourly Time Signal sound in all modes.

To select the alarm type

 

1. In the Alarm Mode, press Dto display the alarm

Alarm on/off indicator

screen.

 

2. Press Ato cycle through the available alarm

 

settings shown below.

Alarm off

Single

Snooze

 

alarm on

alarm on

The alarm on indicator and the snooze alarm on indicator are shown on the display in all modes while these functions are turned on.

The snooze alarm on indicator flashes during the 5-minuteintervals between alarms.

Displaying the Alarm Mode setting screen automatically changes the alarm type to single alarm.

Changing the Timekeeping Mode setting screen during a 5-minuteinterval between snooze alarms stops the current snooze alarm operation (but snooze alarm remains as the alarm type setting).

If a snooze alarm time is reached while you are setting the current time in the Timekeeping Mode, the alarm sounds only once. Subsequent snooze alarm operations are not performed.

Stopping a Snooze Alarm Operation

After a snooze alarm time is reached, you can perform the following steps during any 5-minuteinterval between alarms to stop the snooze alarm operation.

To stop a Snooze Alarm Operation

1.While in the Alarm Mode, press Dto display the alarm screen.

2.Next, press A to turn off the alarm or to select the single alarm.

Note that this also changes the alarm type setting. If you want to use the snooze alarm again, you must re-selectit as the alarm type. See “To select the alarm type” for more information.

To test the alarm

In the Alarm Mode, hold down Dto sound the alarm.

To turn the Hourly Time Signal on and off

1.In the Alarm Mode, press D to display the Hourly Time Signal screen.

2.Press A to turn it on and off.

Indicates Hourly Time Signal is on.

Indicates Hourly Time Signal is off.

The Hourly Time Signal on indicator is shown on the display in all modes while this function is turned on.

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USER’S GUIDE 2481

Countdown Timer

Minutes

Hour Seconds

The countdown timer can be set within a range of 1 minute to 24 hours. An alarm sounds when the countdown reaches zero.

You can also select auto-repeat,which automatically restarts the countdown from the original value you set whenever zero is reached.

Countdown timer functions are available in the

Countdown Timer Mode, which you enter by pressing C.

To use the countdown timer

Press D while in the Countdown Timer Mode to start the countdown timer.

When the end of the countdown is reached and auto-repeatis turned off, the alarm sounds for 10 seconds or until you stop it by pressing any button. The countdown time is automatically reset to its starting value after the alarm stops.

Press Dwhile a countdown operation is in progress to pause it. Press D again to resume the countdown.

To completely stop a countdown operation, first pause it (by pressing D), and then press A. This returns the countdown time to its starting value.

To set the countdown start time

1.In the Countdown Timer Mode, hold down A until the hours setting of the countdown start time starts

to flash, which indicates the setting screen.

2. Press Cto move the flashing between the hours and minutes settings.

3. While a setting is flashing, use D to change it.

 

To set the starting value of the countdown time to

 

24 hours, set 0:00.

 

 

4. Press Ato exit the setting screen.

 

To turn auto-repeaton and off

 

 

 

1. In the Countdown Timer Mode, hold down A until

Auto-repeatindicator

the hours setting of the countdown start time starts

 

to flash, which indicates the setting screen.

 

2. Press Bto toggle auto-repeaton (

displayed)

 

and off (

not displayed).

 

Note that pressing Bin the above operation also turns on the backlight.

When the end of the countdown is reached whileauto-repeatis on, the alarm sounds, but the countdown restarts from the beginning without stopping. You can stop the countdown by pressing

D and manually reset to the start time by pressing

A.

The auto-repeatindicator appears in the Countdown Timer Mode only.

Stopwatch

Minutes

Hour Seconds

1/100 second

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

The display range of the stopwatch is 23 hours, 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

C.

To measure times with the stopwatch

Elapsed time

 

 

 

 

Start

Stop

Re-start

Stop

Clear

Split time

 

 

 

 

Start

Split

Split release

Stop

Clear

 

(SPL displayed)

 

 

 

Two Finishes

 

 

 

 

Start

Split

Stop

Split release

Clear

 

First runner

Second runner

Display time of

 

 

finishes.

finishes.

second runner.

 

 

Display time of

 

 

 

 

first runner.

 

 

 

Dual Time

The Dual Time Mode lets you keep track of time in a different time zone.

In the Dual Time Mode, the seconds count is synchronized with the seconds count of the Timekeeping Mode.

To set the Dual Time

1. Press C to enter the Dual Time Mode.

Hour : Minutes Seconds 2. In the Dual Time Mode, hold down A until the hour setting starts to flash, which indicates the

setting screen.

3. Press C to change the selection in the following sequence.

Hour Minutes

4. Press D to increase the setting.

5. Press A to exit the setting screen.

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.

Auto return features

If you leave a screen with flashing digits for two or three minutes without performing any operation, the watch automatically saves any settings you have made up to that point and exits the setting screen.

Data and Setting Scrolling

The D button is used to scroll through setting screen data on the display. Holding down this button during a scroll operation scrolls through the data at high speed.

Backlight Precautions

The backlight uses an EL (electro-luminescent)panel that causes the entire display to glow for easy reading in the dark. In any mode, press Bto illuminate the display for about one second.

The EL 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.

The backlight automatically turns off whenever an alarm sounds.

Frequent use of the backlight shortens the battery life.

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