Casio 2752 Users Manual QW

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Operation Guide 2752

1

MO0402-EA

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your

purchase, be sure to carefully read this manual and keep it on hand for later reference

when necessary.

•This watch does not have a time zone that corresponds to the Greenwich

Mean Time differential of –3.5 hours. Because of this, the radio-controlled

timekeeping and World Time functions will not display the correct time for

Newfoundland, Canada.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright

light.

•Be sure to read “Battery” of this manual for important information you need to

know when exposing the watch to bright light.

If the digital display of the watch is blank...

If the Power Saving indicator ( ) is flashing on the

display, it means that the display is blank because the

watch’s Power Saving function has turned it off to

conserve power. Power Saving automatically turns off the

display and enters a sleep state whenever your watch is

left for a certain period in an area where it is dark. If the

watch is kept in the dark for a longer period, the analog

hands will also stop moving after a few days.

•The initial factory default setting is Power Saving on.

•The watch will recover from the sleep state if you move it

to a well-lit area, if you press any button, or if you angle

the watch towards your face for reading.

•See “Power Saving Function” for more information.

Power saving

indicator

•The Home City reverts to TYO (Tokyo), which means that the watch is

configured to receive the Japanese time calibration signal, whenever battery

power drops to Level 4. If you are using the watch in North America, you will

need to configure your Home City code setting whenever battery power

recovers after dropping to Level 4. See “To set your Home City” for more

information.

About This Manual

•Depending on the model of your watch, display text

appears either as dark figures on a light background, or

light figures on a dark background. All sample displays

in this manual are shown using dark figures on a light

background.

•Button operations are indicated using the letters shown

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.

(Light)

▲

▲

▲

Alarm Mode Countdown Timer Mode

Stopwatch Mode

▲

General Guide

•Press C to change from mode to mode.

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

Timekeeping Mode Press C.

▲

▲

World Time Mode

Hand Setting Mode

Radio-controlled Atomic Timekeeping

This watch receives a time calibration signal and updates

its time setting accordingly. The time calibration signal

includes both Standard Time and Daylight Saving Time

(summer time) data.

•This watch is designed to pick up the time calibration

signal transmitted in the United States (Fort Collins,

Colorado) and the time calibration signals transmitted in

Japan.

•The U.S. time calibration signal can be picked up by the

watch while in North America*.

*The term “North America” in this manual refers to the

area that consists of Canada, the continental United

States, and Mexico.

Day of week

Minute hand

Hour hand

Seconds

Current Time Setting

This watch automatically adjusts its time setting in accordance with a time calibration

signal. You can also perform a manual procedure to set the time and date, when

necessary.

•The first thing you should do after purchasing this watch is to set your Home City,

which is the city where you will normally use the watch. For more information, see

“To set your Home City” below.

•When using the watch outside the ranges of the U.S. and Japanese time signal

transmitters, you have to adjust the current time setting manually as required. See

“Timekeeping” for more information about manual time setting.

•The analog time of this watch is synchronized with the digital time. Because of this,

the analog time setting is automatically adjusted whenever you change the digital

setting. See “Analog Timekeeping” for more information.

To set your Home City

1. In the Timekeeping Mode, hold down A until the city

code starts to flash, which indicates the setting screen.

2. Use D (east) and B (west) to scroll through the city

codes until the one you want to use as your Home City

is displayed.

•The following are the city codes for major cities in

North America.

LAX: Los Angeles, San Francisco, Las Vegas,

Seattle, Vancouver, Tijuana

DEN: Denver, El Paso, Edmonton, Culiacan

CHI: Chicago, Houston, Dallas/Fort Worth, New

Orleans, Winnipeg, Mexico City

NYC: New York, Detroit, Miami, Boston, Montreal

TYO: All cities in Japan

•Note that this watch does not have a city code that corresponds to Newfoundland.

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City code

3. Press A to exit the setting screen.

•Normally, your watch should show the correct time as soon as you select your Home

City Code. If it does not, it should adjust automatically after the next auto receive (in

the middle of the night). You can also perform manual receive or you can set the time

manually.

•If you are in an area that does not use Daylight Saving Time (summer time), turn off

the DST setting.

To display the digital time and last signal screen

•In the Timekeeping Mode, press B to cycle through the digital time screens as

shown below.

•In the Timekeeping Mode, press D to display the last signal screen. The last signal

screen shows the date and time of the last successful time calibration signal

reception.

▲

Press B.

Day Day of weekSeconds Month. Day

Seconds Hour:

Minutes

PM

indicator

▲

▲

DST indicator

Press D.

Last Signal

Screen

Reception date

Seconds Day of

week

Reception time

▲

BB

B

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal:

auto receive and manual receive.

•Auto Receive

With auto receive, the watch automatically picks up the time calibration signal five

times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more

information, see “About Auto Receive”.

•Manual Receive

Manual receive lets you start a time calibration signal reception with the press of a

button. For more information, see “To perform manual receive”.

Important!

•When getting ready to receive the time calibration signal, position the watch as

shown in the nearby illustration, with its 12 o’clock side facing towards a window.

Make sure there are no metal objects nearby.

•The watch should not be on its side or facing the wrong way.

Resin Band Metal Band

Operation Guide 2752

2

•Proper signal reception can be difficult or even impossible under the conditions listed

below.

•Signal reception is normally better at night than during the day.

•Time calibration signal reception takes from two to six minutes, but in some cases it

can take as long as 12 minutes. Take care that you do not perform any button

operations or move the watch during this time.

Inside or

among

buildings

Inside a

vehicle

Near

household

appliances,

office

equipment,

or a mobile

phone

Near a

construction

site, airport, or

other sources

of electrical

noise

Near high-

tension

power lines

Among or

behind

mountains

•When within range of the applicable transmitter, this watch can receive either the

U.S. (Fort Collins, Colorado) or Japanese (Fukushima or Fukuoka/Saga) time

calibration signal. The signal the watch will attempt to pick up depends on its current

Home City code setting as shown below.

Home City Code

LAX, DEN, CHI, NYC

TYO*

Frequency

60kHz

40kHz

60kHz

Transmitter

Fort Collins, Colorado

Fukushima

Fukuoka/Saga

*With

TYO

, you can specify either 40kHz or 60kHz.

•Under good reception conditions, signal reception is possible within a radius of

about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter.

•At distances further than about 600 miles (1,000 kilometers) from the Fort Collins

transmitter, signal reception may not be possible during certain times of year or

times of day. Radio interferance may also cause problems with reception.

•At distances further than about 500 kilometers from the Fukushima and Fukuoka/

Saga transmitter, signal reception may not be possible during certain times of year

or times of day. Radio interferance may also cause problems with reception.

1,000

kilometers

1,000

kilometers

Fukuoka/Saga

500

kilometers

Fukushima

500

kilometers

2,000 miles

Fort Collins

600 miles

•See the information under “Signal Reception Troubleshooting” if you experience

problems with time calibration signal reception.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time

calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00

a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will

also perform an additional auto receive at 5:00 a.m. if none of the regularly scheduled

auto receive operations are successful.

Note

•Auto receive is performed only if the watch is in the Timekeeping Mode or World

Time Mode when one of the calibration times is reached. It is not performed if a

calibration time is reached while an alarm is sounding, or while you are configuring

settings (while settings are flashing on the display).

•Auto receipt of the calibration signal is designed to be performed early in the

morning, while you sleep (provided that the Timekeeping Mode time is set correctly).

Before going to bed for the night, remove the watch from your wrist, and put it in a

location where it can easily receive the signal.

•When auto receive is turned on, the watch receives the calibration signal for two to

six minutes everyday when the time in the Timekeeping Mode reaches each of the

five calibration times. Do not perform any button operation within six minutes before

or after any of the five calibration times. Doing so can interfere with correct

calibration.

•Remember that reception of the calibration signal depends on the time kept in the

digital display. Reception will be performed whenever the display shows one of the

five calibration times, regardless of whether or not the displayed time is actually the

correct time.

•When two, three, four, or five receptions are successful, the watch uses the data of

the last reception for calibration. When only one reception is successful, the watch

uses the data of the successful reception.

About the Receiving Indicator

The receiving indicator shows the strength of the calibration signal being received. For

best reception, be sure to keep the watch in a location where signal strength is

strongest.

•Even in an area where signal strength is strong, it takes about 10 seconds for signal

reception to stabilize enough for the receiving indicator to indicate signal strength.

•Use the receiving indicator as a guide for checking signal strength and for finding the

best location for the watch during signal reception.

Receiving indicator

Weak Strong

(Level 1) (Level 4)

•The Level 4 receiving indicator remains on the display in all modes following

reception of the time calibration signal and calibration of the watch’s time setting.

The Level 4 receiving indicator is not displayed if signal reception was unsuccessful

or after manual adjustment of the current time setting.

•The Level 4 receiving indicator indicates that at least one of the five calibration

signal receive operation was successful. Note, however, that the Level 4 receiving

indicator is cleared from the display at 3:00 a.m. each day.

To perform manual receive

1. Place the watch on a stable surface so its top (12

o’clock side) is facing towards a window.

2. In the Timekeeping Mode, hold down D for about two

seconds until the watch beeps.

3. After you release D, the display will alternate between

the current time and date, and the letters RC!. This

indicates that signal reception is in progress.

RC!

Receiving indicator

•Time calibration signal reception normally takes from two to six minutes. In Japan,

however, reception can take up to 12 minutes. Take care that you do not perform any

button operations or move the watch during this time.

•After signal reception is complete, the display of the watch changes to the last signal

screen.

Note

•To interrupt a reception and return to the Timekeeping Mode, press D.

•If the reception is unsuccessful, the message ERR appears on the display for about

one or two minutes. After that, the watch returns to the Timekeeping Mode.

•You can also change from the last signal or ERR screen to the normal timekeeping

screen by pressing D.

To configure the auto receive setting for the U.S.

Note

•The following procedure applies when you have LAX, DEN, CHI, or NYC

selected as your Home City. If you are using the watch in Japan, see “To configure

auto receive settings for Japan”.

1. In the Timekeeping Mode, press D to display the last

signal screen.

•The watch will automatically return to the

Timekeeping Mode if you do not perform any button

operation for two or three minutes after displaying the

last signal screen.

2. Hold down A until the current auto receive setting

flashes on the display. This is the setting screen.

•If TYO is selected as the Home City, you can specify

a transmitter selection mode.

3. Use B and D to turn auto receive on (ON) or off (OFF).

4. Press A to exit the setting screen.

•To return to the Timekeeping Mode from the last signal screen, press D.

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On/Off status

Problem

Cannot perform

manual receive.

Auto receive is

turned on, but

the Level 4

receiving

indicator does

not appear on

the display.

Time setting is

incorrect

following signal

reception.

Probable Cause

•The watch is not in the Timekeeping

Mode.

•Your current Home City is not one of the

following city codes: LAX, DEN,

CHI, NYC, or TYO.

•You changed the time setting manually.

•The watch was not in the Timekeeping

or World Time Mode, or you were

performing some button operation

during the auto receive.

•Even if reception is successful, the

Level 4 receiving indicator disappears

every day at 3 a.m.

•Time data (hour, minutes, seconds) only

was received during the last reception.

The Level 4 receiving indicator appears

only when time data and date data

(year, month, day) are both received.

•If the time is one hour off, the DST

setting may be incorrect.

•The Home City code setting is not

correct for the area where you are using

the watch.

What you should do

•Enter the Timekeeping Mode

and try again.

•Select LAX, DEN, CHI,

NYC, or TYO as your Home

City.

•Perform manual receive or

wait until the next auto signal

receive is performed.

•Check to make sure the

watch is in a location where it

can receive the signal.

•Change the DST setting to

Auto DST.

•Select the correct Home City

code.

Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.

•For further information, see “Important!” under “Time Calibration Signal Reception”

and “Radio-controlled Atomic Timekeeping Precautions”.

World Time

The World Time Mode digitally displays the current time in

30 cities (29 time zones) around the world.

•Pressing A in the World Time Mode causes the

applicable city code to appear on the digital display for

about one second.

•If the current time shown for a city is wrong, check your

Home City time settings and make the necessary

changes.

•The watch will perform a signal reception even if it is in

the World Time Mode when a calibration time is

reached. If this happens, the World Time Mode time

settings will be adjusted in accordance with the

Timekeeping Mode’s Home City time.

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

World Time Mode, which you enter by pressing C.

City code

Current time in the

selected city code

Mode indicator

To view the time in another city

While in the World Time Mode, press D to scroll through the city codes (time zones)

to the east or B to scroll to the west.

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

Operation Guide 2752

3

To toggle a city code time between Standard Time and Daylight Saving Time

1. In the World Time Mode, use B and D to display the

city code (time zone) whose Standard Time/Daylight

Saving Time setting you want to change.

•Pressing A in the World Time Mode causes the

applicable city code to appear on the digital display for

about one second.

2. Hold down A to toggle Daylight Saving Time (DST

indicator displayed) and Standard Time (DST indicator

not displayed).

DST indicator

•Note that you cannot use the World Time Mode to change the DST setting of the

Home City code you currently have selected in the Timekeeping Mode. See “To

change the Daylight Saving Time (summer time) setting” for information about

turning the Home City code DST setting on and off.

•Note that you cannot switch between Standard Time and Daylight Saving Time while

GMT is selected as the city code.

•The DST indicator will appear on the display whenever you display a city code for

which Daylight Saving Time is turned on.

•Note that the DST/Standard Time setting affects only the currently displayed city

code. Other city codes are not affected.

Alarms

You can set five independent daily alarms. When an alarm

is turned on, the alarm tone 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.

•The alarm number (A1 through A5) indicates an alarm

screen. 00 is shown for the alarm time when the Hourly

Time Signal screen is on the display.

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

Alarm Mode, which you enter by pressing C.

Mode indicator

Alarm number

Alarm time

(Hour : Minutes)

To set an alarm time

1. In the Alarm Mode, use D to scroll through the alarm

screens until the one whose time you want to set is

displayed.

2. Hold down A until the hour digits of the alarm time

start to flash, which indicates the setting screen.

•This automatically turns on the alarm.

3. Press C to move the flashing between the hour and minute settings.

4. While a setting is flashing, use D (+) and B (–) to change it.

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

correctly as a.m. (no indicator) or p.m. (P indicator).

5. Press A to exit the setting screen.

A1 A2 A3

00 A5 A4

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Hourly time signal

on indicator

Alarm on

indicator

Alarm Operation

The alarm sounds in all modes at the preset time for about 10 seconds, or until you

stop it by pressing any button.

To test the alarm

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

To turn an alarm and the Hourly Time Signal on and off

1. In the Alarm Mode, use D to select an alarm or the Hourly Time Signal.

2. When the alarm or the Hourly Time Signal you want to set is selected, press B to

turn it on and off.

Indicates alarm is ON.

Indicates Hourly Time Signal is ON.

•The alarm on indicator ( ) and the Hourly Time Signal on indicator ( ) are shown

on the display in all modes while these functions are turned on.

•If any alarm is on, the alarm on indicator is shown on the display in all modes.

Countdown Timer

You can set the countdown timer within a range of one to

60 minutes. 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.

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

Countdown Timer Mode, which you enter by pressing

C.

To set the countdown start time

1. While the countdown start time is on the display in the

Countdown Timer Mode, hold down A until the current

countdown start time starts to flash, which indicates the

setting screen.

Minutes

Seconds

Mode indicator

•If the countdown start time is not displayed, use the procedure under “To use the

countdown timer” to display it.

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

settings.

3. While a setting is flashing, use D (+) and B (–) to change it.

•See “To turn auto-repeat on and off” below for details on the auto-repeat setting.

4. Press A to exit the setting screen.

Minutes Auto-

repeat

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-repeat is 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 D while 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 B. This returns the countdown time to its starting value.

To turn auto-repeat on and off

1. While the countdown start time is on the display in the

Countdown Timer Mode, hold down A until the current

countdown start time starts to flash, which indicates the

setting screen.

2. Press C to move the flashing to the auto-repeat

setting.

3. Press D to turn auto-repeat on ( displayed) and

off ( displayed).

4. Press A to exit the setting screen.

•When auto-repeat is turned on, the alarm sounds and

countdown starts again whenever the countdown

reaches zero. You can stop the countdown by pressing

D, and manually reset to the countdown start time by

pressing B.

•Auto-repeat timing repeats up to nine times.

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Number of repeats

Stopwatch

The stopwatch lets you measure elapsed time, split times,

and two finishes.

•The display range of the stopwatch is 99 minutes, 59.99

seconds.

•The stopwatch continues to run, restarting from zero

after it reaches its limit, until you stop it.

•Exiting the Stopwatch Mode while a split time is frozen

on the display clears the split time and returns to

elapsed time measurement.

•The stopwatch measurement operation continues even

if you exit the Stopwatch Mode.

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

Stopwatch Mode, which you enter by pressing C.

Seconds

Minutes

1/100 second

Mode indicator

D

Start Stop

Elapsed Time

➤

Re-start Clear

D➤

Stop

D➤D➤B

Split Time

D

Start Split

➤

Split release Clear

B➤

Stop

B➤D➤B

Two Finishes

D

Start Split

➤

Stop Clear

B➤

Split release

D➤B➤B

First runner

finishes.

Display time of

first runner.

Second runner

finishes.

Display time of

second runner.

To measure times with the stopwatch

Illumination

The watch has 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

illuminates the face when you angle the watch towards

your face.

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

the auto light switch indicator) for it to operate.

•See “Illumination Precautions” for other important

information.

To turn on illumination manually

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

one second.

•The above operation turns on illumination regardless of

the current auto light switch setting.

Auto light switch

indicator

About the Auto Light Switch

Turning on the auto light switch causes the display illumination to turn on for about one

second, whenever you position your wrist as described below in any mode. Note that

this watch features a “Full Auto EL Light,” so the auto light switch operates only when

available light is below a certain level. It does not illuminate the display under bright

light.

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

towards you more than 40 degrees causes illumination to turn on.

• Wear the watch on the outside of your wrist.

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.

Operation Guide 2752

4

To turn the auto light switch on and off

In any mode, hold down L for about two seconds to toggle the auto light switch on

(the auto light switch indicator displayed) and off (the auto light switch indicator not

displayed).

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

switch is turned on.

Battery

This watch is equipped with a solar cell and a rechargeable battery (secondary

battery) that is charged by the electrical power produced by the solar cell. The

illustration shown below shows how you should position the watch for charging.

Example: Orient the watch so its face

is pointing at a light source.

• The illustration shows how to position

a watch with a resin band.

• Note that charging efficiency drops

when any part of the solar cell is

blocked by clothing, etc.

•Normally, you should try to keep the

watch outside of your sleeve as much

as possible. Charging is significantly

reduced if the face is only partially

covered.

Solar cell

Important!

•Storing the watch for long periods in an area where there is no light or wearing it in

such a way that it is blocked from exposure to light can cause rechargeable battery

power to run down. Make sure that the watch is normally exposed to bright light

whenever possible.

•Normally, the rechargeable battery should not need replacement, but after very long

use over a number of years, the rechargeable battery may lose its ability to achieve

a full charge. Should you notice problems with getting the rechargeable battery to a

full charge, contact your dealer or CASIO distributor about having it replaced.

•The rechargeable battery should be replaced with a CASIO-specified CTL1616

battery only. Other rechargeable batteries can cause damage to the watch.

•All data stored in memory is deleted, and the current time and all other settings

return to their initial factory defaults whenever battery power drops to Level 4 and

when you have the battery replaced.

•Turn on the watch’s Power Saving function and keep it in an area normally exposed

to bright light when storing it for long periods. This helps to keep the rechargeable

battery from going dead.

Function Status

All functions enabled.

All functions enabled.

Auto and manual receive,

alarm, hourly time signal,

illumination, auto light switch,

and display are disabled.

Though the hands of the watch

do not move, time continues to

be kept internally.

All functions, including

timekeeping, disabled.

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the

rechargeable battery’s power.

Level

1

2

3

4

Battery Power

Indicator

Battery power indicator

Recover indicator

(Charge Soon Alert)

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•The flashing charge indicator ( ) at Level 3 tells you that battery power is very

low, and that exposure to bright light for charging is required as soon as possible.

•At Level 4, all functions are disabled and settings return to their initial factory

defaults. Functions are enabled once again after the rechargeable battery is

charged, but you need to set the time and date, after the battery reaches Level 3

(indicated by the flashing charge indicator ( )) from Level 4. You will not be able

to configure any of the other settings until the battery reaches Level 2 (no charge

indicator) after dropping to Level 4.

•The Home City reverts to TYO (Tokyo), which means that the watch is configured

to receive the Japanese time calibration signal, whenever battery power drops to

Level 4. If you are using the watch in North America, you will need to configure your

Home City code setting whenever battery power recovers after dropping to Level 4.

•

Leaving the watch in direct sunlight or some other very strong light source can cause the

battery power indicator to temporarily show a reading that is higher than the actual

battery level. The correct battery power indicator should appear after a few minutes.

•If you use the light or alarms a number of times during a short period, the recover

indicator appears on the display and the following operations become disabled until

battery power recovers.

Illumination

Beeper tone

Coordination between digital and analog timekeeping

Time calibration signal reception

After some time, battery power will recover and the recover indicator will disappear,

indicating that the above functions are enabled again.

Charging Precautions

Certain charging conditions can cause the watch to become very hot. Avoid leaving

the watch in the areas described below whenever charging its rechargeable battery.

Also note that allowing the watch to become very hot can cause its liquid crystal

display to black out. The appearance of the LCD should become normal again when

the watch returns to a lower temperature.

Warning!

Leaving the watch in bright light to charge its rechargeable battery can cause it

to become quite hot. Take care when handling the watch to avoid burn injury.

The watch can become particularly hot when exposed to the following

conditions for long periods.

•On the dashboard of a car parked in direct sunlight

•Too close to an incandescent lamp

•Under direct sunlight

Exposure Level (Brightness)

Outdoor Sunlight (50,000 lux)

Sunlight Through a Window (10,000 lux)

Daylight Through a Window on a Cloudy Day

(5,000 lux)

Indoor Fluorescent Lighting (500 lux)

Approximate Exposure Time

6 minutes

30 minutes

48 minutes

8 hours

•Since these are the specs, we can include all the technical details.

•Display on 18 hours per day, sleep state 6 hours per day

•1 illumination operation (1.5 seconds) per day

•10 seconds of alarm operation per day

•5 times calibration reception per day

•Stable operation is promoted by frequent charging.

Charging Guide

After a full charge, timekeeping remains enabled for up to about 7 months.

•The following table shows the amount of time the watch needs to be exposed to light

each day in order to generate enough power for normal daily operations.

Recovery Times

The table below shows the amount exposure that is required to take the battery from

one level to the next.

18 hours

92 hours

5 hours

25 hours

– – –

– – –

Exposure Level

(Brightness)

Outdoor Sunlight (50,000 lux)

Sunlight Through a Window

(10,000 lux)

Daylight Through a Window

on a Cloudy Day (5,000 lux)

Indoor Fluorescent Lighting

(500 lux)

Approximate Exposure Time

Level 4 Level 3 Level 2 Level 1

▲

▲

▲

1 hour

4 hours

6 hours

67 hours

▲

•The above exposure time values are all for reference only. Actual required exposure

times depend on lighting conditions.

Timekeeping

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

also explains how to manually set the current date and time.

•All of the operations in this section are performed in the Timekeeping Mode, which

you can enter by pressing C.

▲

Press B.

Day Day of week

Seconds Month. Day Seconds Hour:

Minutes

PM

indicator

▲

▲

DST indicator

Press D.

Last Signal

Screen

Reception date

Seconds Day of

week Reception time

▲

BB

B

Setting the Digital Time and Date Manually

Make sure you select your Home City code before you change the current time and

date settings. World Time Mode times are all displayed in accordance with the

Timekeeping Mode settings. Because of this, World Time Mode times will not be

correct if you do not select the proper Home City code before setting the time and

date in the Timekeeping Mode.

To set the current digital time and date manually

1. In the Timekeeping Mode, hold down A until the city

code starts to flash, which indicates the setting screen.

2. Press C to move the flashing in the sequence shown

below to select other settings.

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City code

3. When the setting you want to change is flashing, use B and/or D to change it as

described below.

Seconds Hour

Minutes

12/24-Hour

Format

Month Year

DST

Day

Power

Saving

City Code

Screen: To do this:

Change the city code

Cycle between Daylight Saving Time

(ON), Standard Time (OFF), and

Auto DST (At)

Toggle between 12-hour (12H) and

24-hour (24H) timekeeping

Do this:

Use D (east) and B (west).

Press D.

Press D.

•See “City Code Table” for a complete list of available city codes.

•See “Power Saving Function” for details about the Power Saving.

4. Press A to exit the setting screen.

•When you exit the setting screen, the analog hands are adjusted automatically to

match the digital time. See “Analog Timekeeping” for more information.

Reset the seconds to 00

Change the hour or minutes

Change the year

Change the month or day

Toggle Power Saving on (ON) and

off (OFF)

Press D.

Use D (+) and B (–).

Use D (+) and B (–).

Press D.

Operation Guide 2752

5

Note

•Auto DST (At) can be selected only while HNL, ANC, LAX, DEN, CHI,

NYC, HKG, TYO, or SELis selected as the Home City code. For more

information, see “Daylight Saving Time (DST)” below.

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.

The time calibration signal transmitted from Fort Collins includes both Standard Time

and DST data. When the Auto DST setting is turned on, the watch switches between

Standard Time and DST (summer time) automatically in accordance with the Fort

Collins signal.

•The time calibration signals transmitted from Fukushima and Fukuoka/Saga do not

include summer time data.

•The default DST setting is Auto DST (At) whenever you select HNL, ANC,

LAX, DEN, CHI, NYC, TYO, SEL, or HKG as your Home City code.

•If you experience problems receiving the time calibration signal in your area, it is

probably best to switch between Standard Time and Daylight Saving Time (summer

time) manually.

To change the Daylight Saving Time (summer time) setting

1. In the Timekeeping Mode, hold down A until the city code starts to flash, which

indicates the setting screen.

2. Press C once and the DST setting screen appears.

3. Use D to cycle through the DST settings in the sequence shown below.

4. When the setting you want is selected, press A to exit the setting screen.

•The DST indicator ( ) appears on the display to indicate that Daylight Saving Time

is turned on.

Auto DST (A t ) DST off (OFF) DST on (ON)

Analog Timekeeping

The analog time of this watch is synchronized with the digital time. The analog time

setting is adjusted automatically whenever you change the digital time.

Note

•The hands for the analog timepiece move to adjust to a new setting whenever any of

the following occurs.

When you change the digital time setting manually

When the digital time setting is changed by time calibration signal reception

When you change the Home City code and/or DST setting

•If the analog time does not match the digital time for any reason, use the procedure

described under “To adjust the analog time” to match the analog setting to the digital

setting.

•Whenever you need to adjust both the digital and the analog time settings manually,

make sure you adjust the digital setting first.

•Depending on how much the hands have to move in order to adjust to the digital

time, it may take some time before they stop moving.

To adjust the analog time

1. In the Timekeeping Mode, press C five times to enter

the Hand Setting Mode.

2. Hold down A until the current digital time starts to

flash, which indicates the setting screen.

3. Use D and B to adjust the analog setting as

described below.

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When you want to do this:

Move the hand setting

forward 20 seconds

Move the hand setting a short

way forward at high speed

Perform this button operation:

•Press D.

•Hold down D.

•Release D when the hands reach the setting

you want.

Move the hand setting a

long way forward at high

speed

•While holding down D to move the hands at

high speed, press B to lock the high-speed

hand movement.

•To stop the hand movement, press any

button.

•Hand movement stops automatically if the hour

hand makes one full (12-hour) revolution.

4. Press A to exit the setting screen.

•The minute hand will be adjusted slightly to match the seconds when you exit the

setting screen.

•To return to the Timekeeping Mode, press C.

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.

Power Saving Function

When turned on, the Power Saving function automatically

enters a sleep state whenever the watch is left in an area

where lighting is dim (less than about 30 lux).

The following shows how watch functions are affected

when left in a dark place while in the sleep state.

Power saving

indicator

Elapsed Time in Dark

60 to 70 minutes

6 or 7 days

Functions

•LCD off

•Alarm, hourly time signal, analog timekeeping and

auto receive enabled

• LCD off, alarm and hourly time signal disabled

• Analog timekeeping stopped at 12 o’clock

• Auto receive disabled

•Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.

•The watch will not enter the sleep state between 6:00 AM and 10:59 PM. If the

watch is already in the sleep state when 6:00 AM arrives, however, it will remain in

the sleep state.

To recover from the sleep state

Perform any one of the following operations.

•Move the watch to a well-lit area.

•Press any button.

•Angle the watch towards your face for reading.

To turn Power Saving on and off

1. In the Timekeeping Mode, hold down A until the city

code starts to flash, which indicates the setting screen.

2. Press C nine times until the Power Saving on/off

screen appears.

3. Press D to toggle Power Saving on (ON) and off

(OFF).

4. Press A to exit the setting screen.

•The Power Saving indicator ( ) is on the display in all

modes while the Power Saving is turned on.

Auto Return Features

•If you leave the watch in the Alarm or Hand Setting Mode for two or three minutes

without performing any operation, it automatically returns to the Timekeeping Mode.

•If you leave the watch with a flashing setting on the display for two or three minutes

without performing any operation, the watch automatically exits the setting screen.

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On/Off status

Scrolling

The B 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.

Initial Screens

When you enter the World Time or Alarm Mode, the data you were viewing when you

last exited the mode appears first.

Radio-controlled Atomic Timekeeping Precautions

•Strong electrostatic charge can result in the wrong time being set.

•Even when the watch is within the reception range of the transmitter, signal

reception will be impossible if the signal is blocked by mountains or other geological

formations between the watch and signal source.

•Signal reception is affected by weather, atmospheric conditions, and seasonal

changes.

•The time calibration signal bounces off the ionosphere. Because of this, such factors

as changes in the reflectivity of the ionosphere, as well as movement of the

ionosphere to higher altitudes due to seasonal atmospheric changes or the time of

day may change the reception range of the signal and make reception temporarily

impossible.

•Even if the time calibration signal is received properly, certain conditions can cause

the time setting to be off by up to one second.

•The current time setting in accordance with the time calibration signal takes priority

over any time settings you make manually.

•The watch is designed to automatically update the date and day of the week for the

period January 1, 2000 to December 31, 2099. Setting of the date by the time

calibration signal cannot be performed starting from January 1, 2100.

•This watch can receive signals that differentiate between leap years and non-leap

years.

•Though this watch is designed to receive both time data (hour, minutes, seconds)

and date data (year, month, day), certain signal conditions can limit reception to time

data only.

•Normally, the signal reception date shown by the last signal screen is the date data

included in the received time calibration signal. When only time data is received,

however, the last signal screen shows the date as kept in the Timekeeping Mode at

the time of signal reception.

•If you are in an area where proper time calibration signal reception is impossible, the

watch keeps time within ±15 seconds a month at normal temperature.

•If you have problems with proper time calibration signal reception or if the time

setting is wrong after signal reception, check your current city code, DST (summer

time), and auto receive settings. The following are the initial factory defaults for these

settings.

Setting

City code

DST (summer time)

Auto receive

Initial Factory Default

NYC (New York)

(Auto switching)

(Auto receive)

To configure auto receive settings for Japan

Note

•The following procedure applies when you have TYO (Tokyo) selected as your

Home City. If you are using the watch in the U.S., see “To turn configure the auto

receive setting for the U.S.”.

1. In the Timekeeping Mode, press D to display the last

signal screen.

•The watch will automatically return to the

Timekeeping Mode if you do not perform any button

operation for two or three minutes after displaying the

last signal screen.

2. Hold down A until the Japan auto receive indicator

flashes on the display. This is the setting screen.

3. Use D or B to specify the transmitter selection mode

you want to use.

•Each press of D or B cycles through the available

auto receive settings described below.

At : Auto receive on. The watch automatically

selects the transmitter whose signal is

strongest. Signal reception can take up to 12

minutes when this option is selected.

40 : Auto receive on for reception of the

Fukushima signal (40kHz).

60 : Auto receive on for reception of the Fukuoka/

Saga signal (60kHz).

OFF : Auto receive off.

4. Press A to exit the setting screen.

•To return to the Timekeeping Mode from the last signal

screen, press D.

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Japan auto receive

indicator

Operation Guide 2752

6

Timekeeping

•Resetting the seconds to 00 while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are

reset to 00 without changing the minutes.

•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-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 or when battery power drops to

Level 4.

•The current time for all city codes in the Timekeeping Mode and World Time Mode is

calculated in accordance with the Greenwich Mean Time (GMT) differential for each

city, based on your Home City time setting.

•GMT differential is calculated by this watch based on Universal Time Coordinated

(UTC*) data.

* UTC is the world-wide scientific standard of timekeeping. It is based upon carefully

maintained atomic (cesium) clocks that keep time accurately to within microseconds. Leap

seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s rotation.

The reference point for UTC is Greenwich, England.

12-hour/24-hour Timekeeping Formats

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

applied in all other modes.

•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 no 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.

Illumination Precautions

•The electro-luminescent panel that provides illumination loses power after very long

use.

•Display illumination may be hard to see when viewed under direct sunlight.

•Illumination automatically turns off whenever an alarm sounds.

•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 illumination runs down the battery.

Auto light switch precautions

•Wearing the watch on the inside of your wrist, movement of your arm, or vibration of

your arm can cause frequent activation of the auto light switch and illumination of the

display. To avoid running down the battery, turn off the auto light switch whenever

engaging in activities that might cause frequent illumination of the display.

•Note that wearing the watch under your sleeve while the auto light switch is turned

on can cause frequent illumination of the display and can run down the battery.

•Illumination may not turn on 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.

•Illumination turns off in about one second, even if you

keep the watch pointed towards your face.

•Static electricity or magnetic force can interfere with

proper operation of the auto light switch. If illumination

does not turn on, try moving the watch back to the

starting position (parallel with the ground) and then tilt it

back towards 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, illumination may not turn on until about one second after

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

malfunction of the auto light switch.

•You may notice a very faint clicking sound coming from the watch when it is shaken

back and forth. This sound is caused by mechanical operation of the auto light

switch, and does not indicate a problem with the watch.

More than 15 degrees

too high

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New York

Caracas

Rio De Janeiro

London

Paris

Berlin

City City GMT Other major cities in same time zone

Code

Differential

City Code Table

– – –

HNL

ANC

LAX

DEN

CHI

NYC

CCS

RIO

– – –

– – –

GMT

LON

PAR

BER

–11.0

–10.0

–09.0

–08.0

–07.0

–06.0

–05.0

–04.0

–03.0

–02.0

–01.0

+00.0

+01.0

Pago Pago

Papeete

Nome

San Francisco, Las Vegas, Vancouver,

Seattle/Tacoma, Dawson City, Tijuana

El Paso, Edmonton, Culiacan

Houston, Dallas/Ft. Worth,

New Orleans, Mexico City, Winnipeg

Montreal, Detroit, Miami, Boston,

Panama City, Havana, Lima, Bogota

La Paz, Santiago, Pt. Of Spain

Sao Paulo, Buenos Aires, Brasilia, Montevideo

Praia

Dublin, Lisbon, Casablanca, Dakar, Abidjan

Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg,

Frankfurt, Vienna, Stockholm

Athens

Cairo

Jerusalem

Jeddah

Tehran

Dubai

Kabul

Karachi

Delhi

Dhaka

Yangon

Bangkok

Hong Kong

Seoul

Tokyo

Adelaide

Sydney

Noumea

Wellington

+02.0

+03.0

+03.5

+04.0

+04.5

+05.0

+05.5

+06.0

+06.5

+07.0

+08.0

+09.0

+09.5

+10.0

+11.0

+12.0

Helsinki, Istanbul, Beirut, Damascus,

Cape Town

Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow

Shiraz

Abu Dhabi, Muscat

Male

Mumbai, Kolkata

Colombo

Jakarta, Phnom Penh, Hanoi, Vientiane

Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,

Ulaanbaatar

Pyongyang

Darwin

Melbourne, Guam, Rabaul

Pt. Vila

Christchurch, Nadi, Nauru Is.

ATH

CAI

JRS

JED

THR

DXB

KBL

KHI

DEL

DAC

RGN

BKK

HKG

SEL

TYO

ADL

SYD

NOU

WLG

•Based on data as of June 2003.