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USER’S GUIDE 2490

General Guide

• Press C to change from mode to mode.

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

Basic Data Input

Mode

Countdown Timer

Mode

Dual Time ModeAlarm ModeStopwatch Mode Recall ModeTimekeeping 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 current time color.

To set the time and date

1. In the Timekeeping Mode, hold down B 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.

Seconds Hour Minutes 12/24-Hour

Format

Day YearMonth

Day of week

Hour : Minutes Seconds

Year Month – Day

PM indicator

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

and A

to change it as

described below.

To change this setting

Seconds

Hour, Minutes, Year, Month, Day

12/24-Hour Format

Perform this button operation

Press D to reset to 00.

Use D(+) and A(–) to change the setting.

Press D to toggle between 12-hour (BCL) and

24-hour (CEL) timekeeping.

• 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 B to exit the setting screen.

• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all modes.

• The day of the week is automatically displayed in accordance with the date (year,

month, and day) settings.

Current Time Color Setting

You can select from among three different colors for the

current time. The color you select affects the figures in the

center part of the display, and the AM (A)/PM (P)

indicator, which appears in the upper part of the display.

To change the timekeeping color

In the Timekeeping Mode, hold down for about oneD

second to change the color of the current time.

• Each time you perform the above operation, the color

setting changes in the sequence: black

➜

blue

➜

red

➜

black, and so on.

• The above setting affects the hour, minutes, seconds,

and am/pm indicator only.

Stopwatch

The stopwatch is a 1/100-second stopwatch that

measures elapsed time and lap/split times. The stopwatch

uses the data you input in the Basic Data Input Mode and

a pacer signal to calculate the distance you cover while

jogging or running. Stopwatch times and your distance

are also stored in memory.

• The stopwatch measurement operation continues even

if you exit the Stopwatch Mode.

• Exiting the Stopwatch Mode while a lap/split time is

frozen on the display clears the lap/split time and

returns to elapsed time measurement.

• Stopwatch measurements are performed in the

Stopwatch Mode, which you enter by pressing .C

How the Stopwatch Works

There are two ways you can use the stopwatch: to measure elapsed time and lap/split

times like a standard stopwatch (see “To measure times with the stopwatch”), and to

keep track of the distance you cover while jogging or running. In order to use the

stopwatch to keep track of distance, you must first perform the steps listed below.

1. Set your basic data. See “Inputting Basic Data”.

2. Configure the pacer signal. See “About the Pacer Signal”.

Timekeeping Mode time

Hours

Minutes 1/100 second

Seconds

Note

• In order to obtain accurate distance calculations, you must set accurate basic data

and keep your exercise pace in accordance with the pacer signal emitted by the

watch.

• See “How Stopwatch Data is Stored” for information about the type of data the

watch stores in memory when you use the stopwatch.

• You can view distance covered data only by recalling it in the Recall Mode. It does

not appear on the Stopwatch Mode screen.

To measure times with the stopwatch

Elapsed Time

Start Stop Re-start Stop Clear

Lap/Split Time

Start Lap/Split Next

Lap/Split

Stop Clear

Note

• Pressing D to perform a lap/split time operation freezes the lap/split time at that

point on the display for about eight seconds. After that, the display returns to normal

stopwatch time measurement.

• During a stopwatch time measurement operation, the upper part of the display

shows the hour digit and the current lap/split number, the center part shows the

current split time, and the lower part shows the current lap time.

Selecting the Stopwatch Screen Format

The following shows how you can control the position of the lap time and split time on

the stopwatch screen.

Press .

More than 10 hours

Hours Split time

Minutes SecondsLap/Split number

Lap/Split

indicator

Lap time Split time

Lap time

• The Lap/Split indicator uses arrows to indicate the location the lap time and split

(elapsed) time.

• If you have red or blue selected for the current time in the Timekeeping Mode, the

center part of the display is blue while a split time is frozen on the display, and red

while a lap time is frozen.

• When you first start a stopwatch operation by pressing A, both the center part and

the lower part of the display show minutes, seconds, and 1/100 second. Whenever the

time shown in the lower part of the display is greater than 60 minutes, the display

format changes to show hours, minutes, and seconds. Whenever the time in the center

part of the display is greater than 10 hours, the display format changes to show hours,

minutes, and seconds.

About the Pacer Signal

The pacer signal of this watch beeps in accordance with a pacer value (rate) set by

you. You can use the pacer signal to maintain a constant pace while jogging or

running. You can also turn off the pacer signal when you do not want to use it.

• The pacer value you set specifies the number of beeps per minute.

• Turning on the pacer signal causes the watch to beep at the rate specified by the

pacer value.

• You can disable the pacer function by setting a pacer value of . While thexxx

pacer value is set to , the watch does not calculate distance covered.xxx

To set the pacer value

1. While the Stopwatch Mode screen shows all zeros

( ´ ´´0:00 00 00), hold down B until the pacer value

appears flashing on the display. This is the pacer value

setting screen.

2. Press C to turn on the pacer signal.

• Each press toggles the pacer signal on (sounds) and

off (does not sound).

3. Use D A (+) and (–) to change the pacer value.

• Each press of a button changes the pacer value in

units of 5. You can set a pacer value in the range of

100 to 200.

• Pressing whileDwhile the pacer value is 200 or A

it is 100 changes the value to xxx.

4. Press B to exit the setting screen.

Pacer value

Pacer signal on indicator

About This Manual

• Button operations are indicated using the letters shown

in the illustration.

• This watch is 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.

(Light)

USER’S GUIDE 2490

Countdown Timer

You can set the countdown timer within a range of 10

seconds to 100 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 can enter using C.

To set the countdown start time

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

hour setting of the countdown start time starts to flash,

which indicates the setting screen.

2. Press C to move the flashing between the hours,

minutes, and seconds.

3. Use D A (+) and (–) to change the flashing item.

• To set the starting value of the countdown time to 100 hours, set 0:00 00.

• You can set the seconds in 10-second increments.

4. Press B to exit the setting screen.

To use the countdown timer

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

• When the end of the countdown is reached and auto-repeat is turned off, the alarm

sounds for four 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 Awhile a countdown operation is in progress to pause it. Press Aagain to

resume the countdown.

• To completely stop a countdown operation, first pause it (by pressing A), and then

press D. This returns the countdown time to its starting value.

To turn auto-repeat on and off

While the countdown start time is displayed on the

Countdown Timer Mode screen, press D to toggle

auto-repeat on ( displayed) and off ( not displayed).

• The countdown time is displayed in blue while

auto-repeat timing is turned on.

• When the end of the countdown is reached and

auto-repeat is turned on, the alarm sounds, but the

countdown starts again automatically whenever the

countdown reaches zero. You can stop timing by

pressing A, and manually reset to the starting

countdown time by pressing D.

• Frequent use of auto-repeat and the alarm can run

down battery power.

To turn pacer signal on and off

While the Stopwatch Mode screen shows anything other than all zeros, hold down B

for about one second to toggle the pacer signal on ( displayed) and

off ( not displayed).

• Each press of B toggles the middle part of the display between the lap time and

split time.

Recall Mode

Use the Recall Mode to recall and delete records stored

by the Stopwatch Mode.

• Stopwatch records are stored in “logs” that are created

automatically by the watch. See “Memory Management”

for more information.

• The title screen of the newest log appears first

whenever you enter the Recall Mode.

• Log numbers are automatically assigned in sequence,

starting from 01.

• All of the operations in this section are performed in the

Recall Mode, which you enter by pressing C.

To recall stopwatch records

In the Recall Mode, use

to scroll through the log title

screens, starting from the newest one, as shown below. When

the title screen of the log you want is displayed, use

and

to cycle through the records contained in the log.

Cumulative Total Screen Stopwatch Record

Screen

Best Lap Time

Screen

Log Title Screen

Press .

Lap/Split number BEST indicator

Lap time

Split time

• The cumulative total screen shows the total distance since the last cumulative total

distance reset.

• The locations of the lap time and split time (middle or bottom of the display) in the

Stopwatch Record screen are determined by the display format you last selected in

the Stopwatch Mode.

• The BEST indicator identifies the record that contains the best lap time in the log.

• If the watch is configured for the split time in the middle part of the display, the split

time is shown on the Best Lap Time screen in blue. If the lap time is in the middle, it

is shown in red.

• If a best lap time record is deleted automatically when the log becomes full, the

BEST indicator will not be transferred to the record with the next best lap time. See

“Memory Management” for more information about automatic deletion of records.

• The unit of measurement used for the distance calculation depends on the unit you

select for your stride length as shown in the table below. See “To input your basic

data” for more information.

Distance covered

Creation date

(Month – Day)

Log number

Log Title Screen

To delete a log

1. In the Recall Mode, display the title screen of the log you want to delete.

• See “To reset the cumulative total screen” below for information about what

happens when you select the cumulative total screen here.

2. Hold down A

and D

until the watch emits a long beep and cmr

stops flashing on

the display.

• This deletes the log and all the records inside it. Deleting a log does not change the

cumulative total distance value.

To reset the cumulative total screen

1. In the Recall Mode, display the cumulative total screen.

2. Hold down A and D

until the watch emits a long beep and cmr

stops flashing on

the display.

• This resets the cumulative total distance to zero, without deleting any logs or

records. A new cumulative total will start with the next stopwatch operation you

perform.

Inputting Basic Data

Basic Data Input Mode lets you specify your stride length

and a stride length unit. The Stopwatch Mode uses this

basic data for calculating distances you cover while

jogging or running.

• The top of the Stride Length screen shows XM in place

of when you have centimeters specified as theYn

stride length unit.

• All of the operations in this section are performed in the

Basic Data Input Mode, which you enter by pressing C.

Basic Data

You can specify either inches ( ) or centimeters ( ) asin cm

the stride length unit. The unit you specify for the stride

length unit also determines the unit of measurement used

for the distance value in the Stopwatch Mode and Recall

Mode, as shown below.

Stride length

• The following examples illustrate how you can calculate values for this setting.

239 steps required to run around a 330-yard track.

330 (yards)

239 (steps) X 36 = 49.70 (approximately 50 inches)

239 steps required to run around a 300-meter track.

300 (meters)

239 (steps) = 1.255 (approximately 125 cm)

• Be sure to update basic data values whenever the person using the watch changes.

Important!

• You cannot change basic data settings while a Stopwatch Mode time measurement

operation is in progress. Stopwatch operation must be stopped and the Stopwatch

screen must be cleared to all zeros before you can change basic data settings.

• Whenever you want to change the stride length unit, you must first reset the Cumulative

Total screen to zero. See “To reset the cumulative total screen” for information about

how to do this.

To input your basic data

1. In the Basic Data Input Mode, hold down B until stride

length starts to flash, which indicates the setting screen.

2. Press C to move the flashing between the stride

length and stride length unit ( ) settings.Yn or XM

3. Input the basic data values you want.

• While the stride length is selected, use D A (+) and

(–) to change it.

• While the stride length unit is selected, press D to

switch between available units. If you find you cannot

change the unit, press to exit the setting screen,B

and then reset the cumulative total screen (see “To

reset the cumulative total screen”).

4. Press B to exit the setting screen.

Timekeeping Mode time

Hours

Minutes

Second

Stride length

Stride length unit

Alarm

When the alarm is turned on, the alarm sounds when the

alarm time is reached.

You can also turn on an Hourly Time Signal that causes

the watch to beep twice every hour on the hour.

• Alarm settings (and Hourly Time Signal settings) are

available in the Alarm Mode, which you enter by

pressing .C

To set the alarm time

1. In the Alarm Mode, hold down B until the hour setting

of the alarm time starts to flash, which indicates the

setting screen.

• This operation automatically turns on the alarm.

2. Press C to move the flashing between the hour and

minutes.

3. Use D A (+) and (–) to change the flashing item.

• When the watch is configured for the 12-hour timekeeping format, take care that

you set the correct a.m. ( indicator) or p.m. ( indicator) time.A P

4. Press B to exit the setting screen.

Daily Alarm Operation

The alarm sounds at the preset time each day for about 20 seconds, or until you stop

it by pressing any button.

To test the alarm

In the Alarm Mode, hold down to sound the alarm.A

Timekeeping Mode

time

Alarm time

(Hour : Minutes)

Alarm on indicator

Hourly time signal on

indicator

Selected Stride Unit

in (inches)

cm (centimeters)

Distance Unit

mi (miles)

km (kilometers)

Stride Length

Unit

Inches (

)

Centimeters (cm)

Setting

Range

16 to 76 in

40 to 190 cm

Setting

Increment

2 in

5 cm

Distance Unit

Miles (mi)

Kilometers (km)

USER’S GUIDE 2490

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

In the Alarm Mode, press to cycle through the on and off settings as shown below.D

Alarm On Indicator/Hourly Time Signal On Indicator

Alarm On

Signal Off

Alarm Off

Signal Off

Alarm On

Signal On

Alarm Off

Signal On

• The alarm time is displayed in blue while the alarm is turned on.

Dual Time

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

different time zone.

• The seconds count of the Dual Time is synchronized

with the seconds count of the Timekeeping Mode.

To set the Dual Time

1. Press C to enter the Dual Time Mode.

2. Use A B D, , and to set the Dual Time Mode time.

• Pressing B sets the Dual Time Mode to the same time

as the Timekeeping Mode.

• Each press of D A (+) and (–) changes the time

setting in 30-minute increments.

Timekeeping Mode time

Dual Time

(Hour : Minutes Seconds)

Backlight

The backlight uses an EL (electro-luminescent) panel that

causes the entire display to glow for easy reading in the

dark. The watch’s auto light switch automatically turns on

the backlight when you angle the watch towards your

face.

• The auto light switch must be turned on (indicated by

the auto light switch on indicator) for it to operate.

• See “Backlight Precautions” for other important

information about using the backlight.

To turn on the backlight manually

In any mode, press L to illuminate the display for about

one second.

• The above operation turns on the backlight regardless

of the current auto light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about one second,

whenever you position your wrist as described below in any mode.

Moving the watch to a position that is parallel to the ground and then tilting it

towards you more than 40 degrees causes the backlight to turn on.

Parallel to ground More than 40

Warning!

• Always make sure you are in a safe place whenever you are reading the

display of the watch using the auto light switch. Be especially careful when

running or engaged in any other activity that can result in accident or injury.

Also take care that sudden illumination by the auto light switch does not

surprise or distract others around you.

• When you are wearing the watch, make sure that its auto light switch is turned

off before riding on a bicycle or operating a motorcycle or any other motor

vehicle. Sudden and unintended operation of the auto light switch can create

a distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down A for about two seconds to toggle the auto light

switch on ( displayed) and off ( not displayed).

• The auto light switch on indicator ( ) is on the display in all modes while the auto

light switch is turned on.

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 Display

Auto Display continually changes the contents of the

digital display.

To turn off Auto Display

Press any button (except for ) to turn off Auto Display.L

To turn on Auto Display

Hold down for about two seconds until the watchC

beeps.

• Note that Auto Display cannot be performed while a

setting screen is on the display.

Auto Return Features

• After you perform any button operation in any mode (except for the Stopwatch

Mode), pressing returns directly to the Timekeeping Mode.C

• If you leave a screen with flashing digits on the display 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.

Auto light switch on

indicator

Data and Setting Scrolling

The A and D buttons are used in various modes and setting screens to scroll

through data on the display. In most cases, holding down these buttons during a scroll

operation scrolls through the data at high speed.

Timekeeping

• With the 12-hour format, the P (PM) indicator appears on the display for times in the

range of noon to 11:59 p.m. and the A (AM) indicator appears 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 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.

• The current time is displayed in the lower part of the Stopwatch, Countdown Timer,

Alarm, and Dual Time screens. On these screens, the a.m. and p.m. indicators are

not shown when the watch is configured for the 12-hour timekeeping format.

Stopwatch

• You can use lap time measurement to time how long it takes to complete a specific

portion (such as a single lap) of a race.

• You can use split time measurement to time how long it takes to get from the start to

a specific point in a race.

Memory Management

Each time you press A to start a new elapsed time, lap/split operation in the

Stopwatch Mode, the watch automatically creates a new “log” in its memory. The log

remains open for data storage until you permanently close it by pressing D to clear

the stopwatch to all zeros.

• The watch has enough memory to hold up to 61 records. Since each log title screen

uses up one record of memory space, the maximum number of lap/split time records

you can store depends on how many logs there are currently in memory, as shown

below.

• The watch also calculates the cumulative total distance for all stopwatch operations

since the last time the cumulative total distance was reset. The cumulative total

does not affect memory capacity.

• If watch memory is already full when you perform a stopwatch button operation that

creates a new log, the oldest log in memory and all of its records are deleted

automatically to make room for the new log.

• If you are adding records to the only log in memory and watch memory becomes full,

adding another record causes the oldest record in the log to be deleted automatically

to make room for the new record.

• If you are adding records to a log when there are multiple logs in memory and watch

memory becomes full, adding another record causes the oldest log in memory and

all of its record to be deleted automatically to make room for new records.

How Stopwatch Data is Stored

The following table describes how data is stored when you perform the various button

operations described under “To measure times with the stopwatch”.

Backlight Precautions

• 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.

• The backlight automatically turns off whenever an alarm sounds.

• Frequent use of the backlight shortens the battery life.

Auto light switch precautions

• In order to protect against running down the battery, the auto light switch

automatically turns off approximately five hours after you turn it on.

• Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light

switch to operate when it is not needed, which shortens battery life. If you want to

wear the watch on the inside of your wrist, turn off the auto light switch feature.

• The backlight may not light if the face of the watch is

more than 15 degrees above or below parallel. Make

sure that the back of your hand is parallel to the ground.

• The backlight turns off in about one second, even if you

keep the watch pointed towards your face.

More than 15 degrees

too high

Memory Capacity

61 Records

Number of Logs

Currently in

Memory

Lap/Split Time Record Capacity

61 records – 1 log title screen = 60

61 records – 2 log title screens = 59

61 records – 5 log title screens = 56

Stopwatch Button Operation

A Start (from all zeros)

A Stop

A Re-start

D Lap/Split

D Clear

Data Store Operation

Creates a new log: current date and distance

(updated as timing progresses)

Time measurement stops, without storing data in memory.

Time measurement re-starts, without storing data in memory.

Creates new record: displayed lap/split times

(

Stopwatch display is cleared to all zeros.

)

• Static electricity or magnetic force can interfere with proper operation of the auto

light switch. If the backlight does not light, try moving the watch back to the starting

position (parallel with the ground) and then tilt it back toward you again. If this does

not work, drop your arm all the way down so it hangs at your side, and then bring it

back up again.

• Under certain conditions, the backlight may not light until about one second after

you turn the face of the watch towards you. This does not necessarily indicate

malfunction of the backlight.

Produktspecifikationer

Varumärke:	Casio
Kategori:	Titta
Modell:	2490

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