Casio 4312, 4313 User Manual

MA0604-EA

Operation Guide 4312/4313

Modes and Display Screens

Each press of the cycles through available modes in the sequence shown on the following pages.

C button sounds a confirmation tone and

Timekeeping Mode

Module 4312 Module 4313

(Display switching)

Button Button

Button

(Mode switching)

Switching between Display Screens

Pressing the button switches between the month/day and hour/minute screens.

Day of the Week

(Light)

Button

Month, Day Seconds

Demo Display

Your watch is set to its Demo Mode at the factory. The Demo Mode causes the watch to cycle through various display modes automatically.

• Normal button operation is not possible while the watch is in the Demo Mode. Auto receive is disabled in the Demo Mode.

Module 4312

• The watch will revert to the Timekeeping Mode automatically if

• All display examples shown here use Module 4312. The module

(Display switching)

■ To exit the Demo Mode

Press any one of the following buttons: A, B, C, or D.

■ To enter the Demo Mode

In the Timekeeping Mode, hold down the C button for about three seconds until the watch beeps.

you leave it in the Alarm Mode or Hand Setting Mode without performing any operation for about two or three minutes.

number is engraved on the back cover of the watch case.

(Light)

Button Button

Day of the Week

Month, Day

Button Button

(Mode switching)

Seconds

Timekeeping Mode

World Time Mode

City Code

Seconds

Hour, Minutes

World Time lets you display the current time in any one of 48 cities (29 time zones) around the world.

Stopwatch Mode

Mode Name

Minutes/Seconds

The stopwatch measures elapsed time in units of 1/100 second up to 59 minutes,

59.99 seconds (60 minutes).

1/100 second

Illumination

In any mode (except when a setting screen is on the display), press the B button to illuminate the display for easy reading in the dark.

• You can specify 1.5 seconds or

2.5 seconds as the duration of display illumination.

Mode Name

Hour, Minutes

Mode Name

Minutes/Seconds

2. Press the

• The seconds start to flash on the display.

C button three

times so the seconds are flashing.

Hand Setting Mode

Use the Hand Setting Mode to synchronize the analog time with the digital time.

Alarm Mode

Use the Alarm Mode to set the alarm, and to turn the hourly time signal on and off.

Timer Mode

The Timer Mode lets you set a start time of up to 60 minutes, in 1-minute steps. An alarm sounds for 10 seconds when the end of the countdown is reached.

Seconds

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• The module number is engraved on the back cover of the watch case.

Important!

• Illumination may be difficult to see under bright sunlight.

• Illumination will turn off if you press any button that sounds a

confirmation tone or if an alarm sounds.

• Illumination will not turn on while manual receive is in progress.

■ To specify the illumination duration

1. In the Timekeeping Mode

hold down the for about two seconds until the transmitter selection mode setting flashes on the display.

• The currently selected city code will be flashing on the display.

A button

City Code

3. Press the

4. When the setting is the way you want, press the

• The display also will exit the setting screen automatically if you do not perform any operation for about two or three minutes.

B button to

toggle the illumination duration between 1.5 seconds ( ) and 2.5 seconds ( ).

button to exit the setting screen.

Operation Guide 4312/4313

How a Radio-controlled Watch Works

What is a radio-controlled watch?

Your radio-controlled watch is designed to receive a time calibration signal that contains standard time data, and adjust its current time setting accordingly.

Signal is received by

Transmitter Long-wave time

Cesium

atomic clock

After the watch receives the Standard Time signal, it performs internal calculations to determine the current time. Because of this, there may be an error of up to one second in the displayed time.

calibration signal

Signal data

Time data

Internally

Watch

Receiving the Calibration Signal

There are two methods you can use in order to receive the time calibration signal.

• Auto receive (Reception is performed automatically at midnight, 1:00, 2:00, 3:00, and 4:00 each morning.)

•

Manual receive (You initiate reception using a button operation.)

• If reception is not successful for any of the normal auto receive operations shown above, auto receive is performed one more time at 5:00 a.m.

•

The watch is set up for auto receive at the factory, so all you need to do is to place it in a location that allows good reception each night.

■

To position the watch for optimum reception

Remove the watch from your wrist and place it somewhere so its top (12 o’clock, where the antenna is located) is facing approximately in the direction of the signal transmitter. Keep it away from metal objects.

Resin Band

Metal Band

• Orienting the watch so it is sideways to the transmitter makes it more difficult to receive the signal.

• Do not move the watch while it is receiving the calibration signal.

built-in antenna.

Decode

Watch decodes received data and converts it to time data.

Time is adjusted according to time data.

Calibration Signal

• The Japanese calibration signal (Call Sign: JJY) is maintained by the National Institute of Information and Communications Technology (NICT). It is transmitted 24 hours a day from the Mt. Otakadoya transmitter (40 kHz) located in Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane transmitter (60 kHz) located on the border between Saga Prefecture and Fukuoka Prefecture.

• The U.S. calibration signal (Call Sign: WWVB) is transmitted by the National Institute of Standards and technology from Fort Collins, Colorado.

The time data of the Japanese calibration signal (Call Sign: JJY) is maintained by the Japan Standard Time Group of the National Institute of Information and Communications Technology (NICT). Note that transmission of the standard wave may be interrupted occasionally due to maintenance, lightning, etc. For more information, visit the website of the Japan Standard Time Group of the National Institute of Information and Communications Technology (NICT) at the following URL.

http://jjy.nict.go.jp

• Note that the above URL is subject to change.

Time Required for Reception

Signal reception takes anywhere from about two to seven minutes. In cases where receipt is not possible from the transmitter from which the signal was last received, reception may take up to 14 minutes.

■ To perform signal reception manually

In the Timekeeping Mode, hold down the about two seconds.

• The watch will beep and reception will start. The receive indicator cycles from “Unstable” through “Stable” as shown below while reception is in progress. How far it cycles depends on the signal strength.

■ To interrupt reception

Press the

• All other buttons besides D are disabled during signal reception.

When reception is successful

The watch terminates reception and adjusts the current time. Next it beeps and then displays the date and time the adjustment was performed. The receive indicator on the display also indicates successful signal reception. The indicator is cleared from the display each day at midnight.

When reception fails (ERR Indicator)

In the case of an error, the watch will not adjust its current time setting, but display “ERR” instead.

•

The display will return to the normal timekeeping screen automatically if you do not perform any operation for about one or two minutes.

D button for

D button.

Reception Ranges

This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB). The signal that is received depends on the current Home City setting.

• For information about selecting a Home City, see “Configuring Home Time Settings”. See “World Time City Code List” for details on city codes.

Home City Transmitter

Either the Mt. Otakadoya signal (40 kHz) or the Mt. Hagane signal

TYO, SEL, HKG

YVR, LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, YYT

• CASIO does not guarantee that the watch will be able to receive a calibration signal correctly each day.

• Geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of the transmitter.

• Best reception is possible late at night.

Receive Indicator

The receive indicator cycles from “Unstable” through “Stable” as shown below while reception is in progress. How far it cycles depends on the signal strength. Keep the watch in a location where reception is stable while reception is in progress.

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Unstable Stable

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• Even under optimum reception conditions, it can take about 10 seconds for reception to stabilize.

• Use the receive indicator to check reception status and to determine the best location for signal reception.

• Note that weather, the time of day, surroundings, and other factors can all affect reception.

(60 kHz)

• Use one of these settings for reception of the Japanese signal in Japan or Taiwan.

Fort Collins, Colorado signal

• Use one of these settings for reception of the U.S. signal in North America.

Indicator

Module 4313

Indicator

Location

Reception is difficult and may even be impossible in the locations described below. Avoid such locations when performing signal reception.

• You should think of your watch operating like a radio or TV when it is receiving the calibration signal.

Among or near buildings

Inside a vehicle

(automobile, train, plane, etc.)

In a location where there is

radio interference

(construction site, airport, etc.)

If you are experiencing problems with reception, move away from the types of locations described above to a location with better reception, and try again.

■ To view the last reception date and time

In the Timekeeping Mode, press the

• This displays the date and time when signal reception was last successful, and the current time and date were last adjusted.

• The “ ” indicator and the last reception date screen alternate at two-second intervals.

• To return to the Timekeeping Mode, press the D button again.

• The display will return to the normal timekeeping screen

automatically if you do not perform any operation for about one or two minutes.

Reception Time Reception Time

Near high-voltage lines

Next to a household appliance or

office equipment (TV, speaker, fax,

PC, mobile phone, etc.)

Near mountains

D button.

Reception Date

Operation Guide 4312/4313

Configuring Auto Receive Settings

Use the procedure below to turn auto calibration signal reception on and off.

• For information about selecting a Home City, see “Configuring Home Time Settings”.

• The following procedure can be performed when any one of the following city codes is selected as the Home Time: TYO, SEL,

HKG, YVR, LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT.

1. In the Timekeeping Mode,

• This displays the last

• The display will return to the

2. Hold down the

• This is the auto receive

press the

D button to

display the last reception date and time.

reception date and time screen.

normal timekeeping screen automatically if you do not perform any operation for about one or two minutes.

A button

for about two seconds until the current auto receive setting flashes on the display.

setting screen.

Reception Time

Troubleshooting

1. The watch cannot receive the time calibration signal.

• Is the signal being transmitted? Though the time data of the Japanese calibration signal (Call Sign: JJY) is maintained by the Japan Standard Time Group of the National Institute of Information and Communications Technology (NICT), it may be interrupted sometimes for periodic maintenance work, or because of lightning or other problems.

• Are you within the reception range of a transmitter? See “Reception Ranges” for information about areas where the watch can receive the signal.

• Is there something in the immediate area that may be interfering with reception? Even if you are within the reception range of a transmitter, objects between you and the transmitter or electrical noise can interfere with reception. Avoid such areas during signal reception. See “Location”.

• Do you have the correct Home City code selected? Remember that auto receive is not performed unless one of the following is selected as the Home City: TYO (Tokyo), SEL (Seoul), HKG (Hong Kong), YVR (Vancouver), LAX (Los Angeles), YEA (Edmonton), DEN (Denver), MEX (Mexico), YWG (Winnipeg), CHI (Chicago), MIA (Miami), YTO (Toronto), NYC (New York), YHZ (Halifax), or YYT (St. John’s). Correctly select your Home City using the procedure under “Configuring Home Time Settings”.

• Is auto receive turned off? Use the procedure under “Configuring Auto Receive Settings” to turn on auto receive.

3. Press the

4. When the setting is the

• Press the D button to

return to the Timekeeping Mode.

• The display also will exit the setting screen automatically if you do not perform any operation for about two or three minutes.

• Is the watch in any mode other than the Timekeeping Mode or World Time Mode during the auto receive times (midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)? Auto receive is performed only when the watch is in the Timekeeping Mode or World Time Mode. It is not performed if the watch is in any other mode.

• Is a timer operation in progress? Calibration signal reception is disabled while a timer operation is in progress. Because of this, you should avoid performing timer operations during the timeframes that signal reception is performed, or perform manual receive after your timer operation is complete.

2. Time calibration signal reception is successful, but the hourly time signal and current time are off slightly.

• After the watch receives the time calibration signal, it performs an internal decoding process before updating its time setting. Because of this, the time setting may be off slightly (within one second).

3. Time calibration signal reception is successful, but the current time is one hour fast.

• Do you have summer time (DST) turned on? Use the procedure under “Configuring Home Time Settings” to select either AUTO or OFF for the summer time setting.

D button to

toggle the setting between ON and OFF.

way you want, press the

A button to exit the

setting screen.

When the Home City is TYO, SEL, or HKG

• ON

Selecting this setting turns on auto receive and auto transmitter selection. The watch selects either the Otakadoya Mountain signal (40 kHz) or the Hagane Mountain signal (60 kHz) automatically, whichever is strongest.

• The transmitter from which a signal was last successfully received will be given priority for the next auto receive operation.

• OFF

Selecting this setting turns off auto receive and auto transmitter selection.

When the Home City is YVR, LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT

• ON

Selecting this setting turns on auto receive. The watch always receives the Fort Collins signal.

• OFF

Selecting this setting turns off auto receive.

4. Time calibration signal reception is successful, but the current time setting is wrong.

• Is TYO (Tokyo) or HKG (Hong Kong) selected for your Home City? Correctly select your Home City using the procedure under “Configuring Home Time Settings”.

5. The digital time and analog time are different.

• Normally, the received time calibration data is used to adjust the digital display time, and then the analog hands are adjusted to match the digital time. If the hands are misaligned for some reason, they will not indicate the correct time. If this happens, use the procedure under “Setting the Analog Time Manually” to adjust the analog time.

6. Can you configure auto receive settings?

• Remember that auto receive is not performed unless one of the following is selected as the Home City: TYO (Tokyo), SEL (Seoul), HKG (Hong Kong), YVR (Vancouver), LAX (Los Angeles), YEA (Edmonton), DEN (Denver), MEX (Mexico), YWG (Winnipeg), CHI (Chicago), MIA (Miami), YTO (Toronto), NYC (New York), YHZ (Halifax), or YYT (St. John’s). Correctly select your Home City using the procedure under “Configuring Home Time Settings”.

7. What time is auto receive performed?

• Auto receive is performed in the middle of the night, when reception conditions are best. Before going to bed at night, place the watch near a window, with 12 o’clock facing in the general direction of the transmitter.

Calibration Signal Reception Precautions

• Auto receive can be performed while the watch is in the Timekeeping Mode or World Time Mode only.

• Signal reception is not possible while a timer operation is in progress.

• Receipt of a calibration signal causes the digital time to be adjusted first, followed by adjustment of the analog time. In order to ensure correct correction of the analog time, be sure to match the analog time with the digital time before performing a signal receive operation.

• Operating any button while auto receive is in progress will cause the watch to beep and then exit the receive operation.

• Make sure you are within the range of the calibration signal transmitter before performing the reception operation. Remember that geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of the transmitter.

• Proper reception may be impossible if there is something blocking the signal. If reception is unsuccessful, try again.

• This watch is designed to adjust its current time setting in accordance with the calibration signal transmitted in Japan and the United States only. Note that you will need to make your own adjustments when using this watch outside of Japan or the United States, or in any area that is outside the range of one of the receivable time calibration signal transmitters.

• When the watch is unable to adjust its time signal using the calibration signal for some reason, timekeeping accuracy is within

±15 seconds per month.

• Strong electrostatic charge can cause timekeeping error.

• Signal reception is cancelled if an alert operation starts while it is

being performed.

• The watch’s calendar shows dates up to the year 2099. Attempting a receive operation after that causes an error.

8. How can I perform manual receive?

• Hold down the lower right D button for about two seconds. The watch will beep to indicate that manual receive has started. Place it near a window, with 12 o’clock facing in the general direction of the transmitter.

9. How can I view the last reception date and time?

• In the Timekeeping Mode, press the lower right D button. This will display the date and time that the time calibration signal was last received successfully. To return to the Timekeeping Mode, press the D button again.

If you cannot receive the calibration signal or if the current time setting is incorrect after signal reception, check the current setup of the watch.

Factory Default Settings

Home City

Summer Time

Auto Receive

Default Settings Following Battery Replacement

Home City

Summer Time

Auto Receive

Hong Kong

Off

Tokyo

Auto (according to signal data)

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