Casio 3747, 4772 User Manual

MO0610-EA

Operation Guide COMBIWAVE1

About This Manual

• The operational procedures for Modules 2735, 3747, and 4772 are identical. All of the illustrations in this manual show Module 2735.

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

• 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.

Module 2735 Module 3747 Module 4772

• 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.

General Guide

• Press C to change from mode to mode.

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

World Time Mode

Timekeeping Mode

Press C.

▲

Alarm Mode

Date Alert Mode

▲

Hand Setting Mode

▲

Radio-controlled Atomic Timekeeping

Hour hand

Minutes hand

Day of week

Month – Day

• 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 of the range of the transmitter in Fort Collins, you need to manually adjust the time as required. See “Timekeeping” for information about manual settings.

• 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

Transmitter indicator

City code

Important!

• 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 operation (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.

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 four times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. For more information, see “About Auto Receive”.

• Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a button. For more information, see “To perform manual receive”.

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 from Fort Collins, Colorado (USA). Reception is possible within North America*.

The term “North America” in this User’s Guide refers to the area that consists of Canada, the continental United States, and Mexico.

Current Time Setting

This watch automatically adjusts its digital time setting in accordance with a time calibration signal. You can also perform a manual procedure to set the time and date, when necessary.

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

transmitter indicator ( indicates the setting screen.

2. Press C to display the city code setting screen.

3. Use D(east) and B(west) to select the city code you

want to use as your Home City.

• The following are the city codes for major cities in North America.

: Los Angeles, San Francisco, Las Vegas,

LAX

Seattle, Vancouver, Tijuana

: Denver, El Paso, Edmonton, Culiacan

DEN

: Chicago, Houston, Dallas/Fort Worth,

CHI

New Orleans, Winnipeg, Mexico City

: New York, Detroit, Miami, Boston, Montreal

NYC

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

4. Press A twice to exit the setting screen.

• The first press of A displays the 12/24-hour setting screen. Pressing A again exits the setting screen.

USA) starts to flash, which

Stopwatch Mode

▲

Important!

• 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.

Resin Band

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

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

below.

Inside or among buildings

• 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.

• At distances further than about 600 miles (1,000 kilometers) from the transmitter, signal reception may not be possible during certain times of year or times of day. Radio interference may also cause problems with reception.

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

• See the information under “Signal Receive 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 digital time in the Timekeeping Mode reaches 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. each day (calibration times).

Inside a vehicle

600 miles

Metal Band

Near household appliances or office equipment, or a mobile phone

Time Recorder Mode

Near a construction site, airport, or other sources of electrical noise

2,000 miles

Fort Collins

Near hightension power lines

▲

Among or behind mountains

Operation Guide COMBIWAVE1

Note

• The auto receive operation 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 digital time in the Timekeeping Mode reaches each of the calibration times. Do not perform any button operation within six minutes before or after any one of the 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. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the displayed time is actually the correct time.

• When two, three, or four 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.

Receiving indicator

• 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 receive operations.

• Following reception of the time calibration signal and calibration of the watch’s time setting, the Level 4 receiving indicator will remain on the display in all modes. The Level 4 receiving indicator will not be displayed if signal reception was unsuccessful or after you adjust the current time setting manually.

• The Level 4 receiving indicator is displayed only when the watch is able to successfully receive both time and date data. It does not appear when only time data is received.

• The Level 4 receiving indicator indicates that at least one of the auto calibration signal receive operations 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

Receiving indicator

Note

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

• If the receive operation is unsuccessful, the message

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

• You can also change from the Last Signal or timekeeping screen by pressing D.

To turn auto receive on and off

On/off status

To display the digital time and Last Signal screen

• In the Timekeeping Mode, press A to cycle through the digital time screens as shown below.

• In the Timekeeping Mode, press D to display the Last Signal screen (indicated by

GET). The Last Signal screen shows the date and time of the last successful time

calibration signal reception.

Month – Day

Day of week

▲

Press D.

▲

Weak

(Level 1)

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. Release D and the current time flashes to indicate that signal reception has started.

• Time calibration signal reception takes from two to six

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.

ERR appears on the display

ERR screen to the normal

1. In the Timekeeping Mode, hold down A until the transmitter indicator starts to flash, which indicates the setting screen.

2. Press C three times to move the flashing to the auto receive on/off setting.

3. Press D to toggle auto receive on (ON) and off (OF).

• If the current Home City setting is a city code that

does not support signal receive, “xx” appears in place of the on/off indicator. This means you cannot turn auto receive on or off.

4. Press A twice to exit the setting screen.

• For information about city codes that support signal

receive, see “To set your Home City”.

Hour: Minutes Seconds Month – Day

▲

Press A.

▲

Receive date

Alternate at twosecond interval

▲

Receive time

Strong

(Level 4)

Seconds

Last Signal Screen

Signal Receive Troubleshooting

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

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.

• For further information, see “Important!” under “Time Calibration Signal Reception” and “Radio-controlled Atomic Timekeeping Precautions”.

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, or NYC.

• You changed the time setting manually.

• The watch was not in the Timekeeping

or World Time Mode, or you performed some button operation during the auto receive operation.

•

Even if receive is successful, the Level 4 receiving indicator disappears every day at 3 am.

• Time data (hour, minutes, seconds) only was received during the last receive operation. 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, or NYC as your Home City.

• Perform manual signal receive or wait until the next auto signal receive operation 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.

World Time

Current time in the selected city code

City Code

To view the time in another city

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

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

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

DST indicator

• The DST indicator is 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.

The World Time shows the current time in 30 cities (29 time zones) around the world.

• 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 receive operation 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.

1. In the World Time Mode, use D to display the city code

(time zone) whose Standard Time/Daylight Saving Time setting you want to change.

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

displayed) and Standard Time (DST not displayed).

• 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.

Alarms

Alarm time (Hour : Minutes)

Alarm name

Hourly Time Signal Screen

To set an alarm time

2. After you select an alarm, 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 alarm.

3. Use 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).

The Alarm Mode gives you a choice of four one-time alarms and one snooze alarm. One of the one-time alarms functions as a “target alarm,” which counts the time remaining from the current Home City time to the target alarm time. Also use the Alarm Mode to turn the Hourly Time Signal on and off.

• There are five alarms named

(target alarm), and SNZ. You can configure SNZ as a snooze alarm only. Alar ms

TAL can be used as one-time alarms only.

• Alarm settings (and Hourly Time Signal settings) are available in the Alarm Mode, which you enter by pressing C.

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

screens until the one whose time you want to set is displayed.

AL1 AL2 AL3

SIG SNZ TAL

AL1, AL2, AL3, TAL

AL1, AL2, AL3, and

Operation Guide COMBIWAVE1

5. Press A to exit the setting screen.

• With the target alarm ( alarm time.

Countdown (Hours : Minutes)

TAL), the time starts to countdown as soon as you set the

Countdown (Seconds)

2 seconds

▲

Target Alarm Screen

Alarm Operation

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the watch is in. In the case of the snooze alarm, the alarm operation is performed a total of seven times, every five minutes, or until you turn the alarm off. The target alarm counts the time remaining from the current Home City time to the target alarm time. Note that the target alarm repeats automatically each day, as long as it is turned on. You need to turn off the target alarm to disable it.

• Pressing any button stops the alarm tone operation.

• Performing any one of the following operations during a 5-minute interval between

snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen Displaying the snooze alarm setting screen

To test the alarm

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

To turn an alarm on and off

Alarm on indicator

Snooze alarm indicator

Modules 2735 and 4772

Alarm on indicator

Snooze alarm indicator

Module 3747

To turn the Hourly Time Signal on and off

Hourly time signal on indicator

Modules 2735 and 4772

Hourly time signal on indicator

Module 3747

1. In the Alarm Mode, use D to select an alarm.

2. Press A to toggle it on and off.

• Turning on a one-time alarm (

TAL) displays the alarm on indicator on its Alarm

Mode screen. Turning on the snooze alarm ( displays the alarm on indicator and snooze alarm indicator on its Alarm Mode screen.

• In all modes, the alarm on indicator is shown for any alarm that is currently turned on. When the snooze alarm is on, the snooze alarm indicator is displayed in all modes.

• The alarm on indicator flashes while the alarm is sounding.

• The snooze alarm indicator flashes during the 5-minute intervals between alarms.

1. In the Alarm Mode, use D to select the Hourly Time

Signal (

2. Press A to toggle it on (the Hourly Time Signal on

indicator displayed) and off (the Hourly Time Signal on indicator not displayed).

• The Hourly Time Signal on indicator is displayed in all modes when the Hourly Time Signal is turned on.

SIG

AL1, AL2, AL3,

SNZ)

Date Alert

Date Alert helps you to remember an important date. After you set an alert date (month and day), a date alert indicator (!) and the current date flash for 24 hours after the alert date arrives in the Timekeeping Mode. You can set up to five different date alerts.

To set the alert date

3. After you select an alert, hold down A until the month setting of the alert date

starts to flash, which indicates the setting screen.

• This operation automatically turns on the alert.

4. Press C to move the flashing between the month and day settings.

5. While the month or day setting is flashing, use D (+) and B (–) to change it.

6. Press A to exit the setting screen.

Alert date (Month – Day)

Alert name

Date Alert Mode Screen Timekeeping Mode Screen

1. Use C to enter the Date Alert Mode.

2. Use D to scroll through the alert screens until the one

whose date you want to set is displayed.

DA1 DA2 DA3

Current date (Month – Day)

Date alert indicator

(Current date does not flash if digital time is displayed on the Timekeeping Mode screen.)

DA5 DA4

To turn an alert on and off

Alert On

▲

Press A.

▲

1. In the Date Alert Mode, use D to select the screen for

the alert (

DA1 through DA5) whose alert type you

want to select.

2. Press A to toggle it on and off.

• Note that the month and day do not appear if the alert is turned off.

Alert Off

Time Recorder

Current time (Hour : Minutes)

Standby Screen

2. Press D to record the current date and time (month, day, hour, minutes).

• The recorded time flashes for about two seconds and then assigned the next available record number, in the range of standby screen appears.

• A new time is recorded each time you press D while the standby screen is on the display.

• Records are assigned numbers sequentially from

• Storing a new time record when there are already 30 records stored in memory

automatically deletes record stores the new record as

To recall Time Recorder times

1. In the Time Recorder Mode, press A to recall Time Recorder times.

• If there are no time recorder times currently in memory, the standby screen

remains on the display when you press A.

2. Use D to scroll through times stored in memory.

Recorded time (Hour : Minutes)

Time record number

• Each press of D scrolls through time records from higher numbered (newer) records to lower numbered records.

• If you recorded a new Time Recorder time since you last entered the Time Recorder Mode, the newest record appears first. If you have not recorded a new time, the record you were viewing when you last exited the Time Recorder Mode appears first.

• Press A to return to the standby screen.

To delete all Time Recorder times

Enter the Time Recorder Mode. While holding down A, press D to delete all Time Recorder times.

The Time Recorder Mode lets you store up to 30 time entries (month, day, hour, minutes) with the touch of a button. One way you can use the Time Recorder Mode is to record the start time and the end time of a particular event.

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

Time Recorder Mode, which you enter by pressing C.

To record a Time Recorder time

1. Use C to enter the Time Recorder Mode.

• This displays the Time Recorder standby screen.

T1through T30. Next the time recorder

T1through T30.

T1, shifts the remaining records upwards by 1, and

T30.

Recorded date (Month – Day)

Alternate at two-second interval

Stopwatch

The stopwatch lets you measure elapsed time, split times,

Seconds

Minutes

1/100 second

To measure times with the stopwatch

Elapsed Time

Start Stop

Split Time

Start Split

Two Finishes

Start Split

and two finishes.

• The display range of the stopwatch is 59 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.

➤

First runner finishes. Display time of first runner.

➤

Re-start Clear

A ➤

➤

Split release Clear

➤

Stop Clear

Second runner finishes.

D ➤

➤

Stop

➤

Split release

Display time of second runner.

➤

Operation Guide COMBIWAVE1

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.

Month – Day

Day of week

▲

Press D.

Setting the Digital Time and Date Manually

Make sure you select your Home City code before you change the current time and date settings. Wor ld 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

Transmitter/ City Settings

Time/Date Settings

3. Use C to display the transmitter screen.

• The transmitter indicator that appears indicates whether the currently selected Home City code is one that supports time calibration signal reception.

This indicator:

USA

---

4. Use C and A to select the other time and date settings, and change the settings

as described below.

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

described below.

Means this:

The currently selected Home City code supports signal reception.

The currently selected Home City code does not support signal reception.

Transmitter/City Settings

Screen: To do this:

DST

Change the city code

Cycle between Daylight Saving Time (

ON), Standard Time ( OFF), and

Auto DST ( Toggle betw een auto receive on

(

ON) and off (OF)

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

Time/Date Settings

Screen:

6. Use A to exit the setting screen.

• If a Transmitter/City Setting screen is displayed, press A twice.

• If a Time/Date Setting screen is displayed, press A once.

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

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

Note

• Auto DST ( is selected as the Home City code. For more infor mation, see “Daylight Saving Time (DST)” below.

• The auto receive setting is used for time calibration signal reception only. See “About Auto Receive” for details.

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 received time signal.

• The default DST setting is Auto DST (

DEN, CHI, or NYC 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 do this:

Toggle betw een 12-hour (12H) and 24-hour (

Reset the seconds to Change the hour or minutes Change the month, day, or year

A) can be selected only while HNL, ANC, LAX, DEN, CHI, or NYC

Hour : Minutes Seconds Month – Day

▲

Press A.

▲

Last Signal Screen

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

transmitter indicator starts to flash, which indicates the setting screen.

2. Use A or C to move the flashing in the sequence

shown below to select other settings.

Transmitter

12/24-Hour Forma t

Day

Press C.

Seconds

Month Year

/ Press A.

DSTCity Code

Hour Minutes

Do this:

Use D (east) and B (west).

Press D.

24H) timekeeping

A) whenever you select HNL, ANC, LAX,

Press D.

Do this:

Press D.

Press D. Use D (+) and B (–). Use D (+) and B (–).

Seconds

Auto

Receive

To change the Daylight Saving Time (summer time) setting

1. In the Timekeeping Mode, hold down A until the transmitter indicator starts to

flash, which indicates the setting screen.

2. Press C twice to display the DST setting screen.

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

Auto DST (A) DST off (

OFF

) DST on (ON)

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

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 the analog hands stop moving.

To adjust the analog time

Current time

When you want to do this:

Move the hand setting forward 20 seconds Move the hand setting back 20 seconds Move the hand setting a short way forward at high speed

Move the hand setting a short way back at high speed

Move the hand setting a long way forward at high speed

Move the hand setting a long way back at high speed

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.

1. In the Timekeeping Mode, press C six 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.

Perform this button operation:

• Press D.

• Press B.

• Hold down D.

• Release D when the hands reach the setting

you want.

• Hold down B.

• Release B when the hands reach the setting

you want.

• While holding down D to move the hands at high-speed, press B to lock the high-speed hand movement.

• Press any button when the hands are close to the setting you want.

• Hand movement stops automatically if the hour hand makes one full (12-hour) revolution.

• While holding down B to move the hands at high-speed, press D to lock the high-speed hand movement.

• Press any button when the hands are close to the setting you want.

• Hand movement stops automatically if the hour hand makes one full (12-hour) revolution.

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 the watch in the Alarm (except for the target alarm screen explained on

“To set an alarm time”), Date Alert or Hand Setting Mode for two or three minutes without performing any operation, it automatically changes 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, it automatically saves any settings you have made up to that point and exits the setting screen.

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, Alar m, or Date Alert 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.

• The time calibration signal is bounced 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, cer tain conditions can cause the time setting to be off by up to one second.

Operation Guide COMBIWAVE1

• The current time setting in accordance with the time calibration signal takes priority over any time settings you make.

• The watch is designed to automatically update the date and day of the week for the period January 1, 2000 to December 31, 2039. Setting of the date by the time calibration signal cannot be performed starting from January 1, 2040.

• 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 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 ±20 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

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 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.

• 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 UTC* data.

* The letters “UTC” stands for “Universal Time Coordinated,” which 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. The indicator 24 indicates the 24-hour format.

Illumination Precautions

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

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

• Illumination 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.

• Illumination turns off automatically whenever an alarm sounds.

• Frequent use of illumination runs down the battery.

Initial Factory Default

NYC (New York) A (Auto switching)

DST

ON (Auto receive)

R/C

City Code Table

City

– – – HNL ANC

LAX

DEN

CHI

NYC

CCS

RIO

– – – – – –

GMT LON PAR BER

ATH CAI JRS

JED THR DXB

KBL

KHI

DEL DAC RGN BKK

HKG

SEL

TYO

ADL SYD NOU WLG

City

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New Yor k

Caracas

Rio De Janeiro

London

Paris

Berlin

Athens

Cairo

Jerusalem

Jeddah

Tehran

Dubai

Kabul

Karachi

Delhi

Dhaka

Yangon

Bangkok

Hong Kong

Seoul

Tokyo

Adelaide

Sydney

Noumea

Wellington

Code

• Based on data as of June 2006.

GMT

Differential

–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

+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

Other major cities in same time zone

Pago Pago Papeete Nome San Francisco, Las Vegas, Vancouver, Seattle/Tacoma, Dawson City, Tijuana El Paso, Edmonton, Culiacan Houston, Dallas/Fort Worth, New Orleans, Mexico City, Winnipeg Montreal, Detroit, Miami, Boston, Panama City, Havana, Lima, Bogota La Paz, Santiago, Port Of Spain Sao Paulo, Buenos Aires, Brasilia, Montevideo

Praia Dublin, Lisbon, Casablanca, Dakar, Abidjan

Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg, Frankfurt, Vienna, Stockholm 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, Per th, Ulaanbaatar Pyongyang

Darwin Melbourne, Guam, Rabaul Port Vila Christchurch, Nadi, Nauru Island

Casio 3747, 4772 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Manual

General Guide

Radio-controlled Atomic Timekeeping

World Time

Alarms

Date Alert

Time Recorder

Stopwatch

Timekeeping

Reference

City Code Table