Casio 3390 User Manual

MA0406-EA

Modes and Display Screens

Operation Guide 3390

Each press of the

• The display will automatically revert to the Timekeeping screen if you leave the Alarm or Hand Setting screen displayed without performing any operation for about two or three minutes.

C button sounds a confirmation tone and cycles through available modes in the sequence shown below.

Timekeeping Mode

Changing Display Screen Contents

Each press of the button cycles display contents in the

Button Button

(Light)(Screen Switching)

Button Button

(Mode switching)

Days of the Week

SUN: Sunday MON: Monday TUE: Tuesday WED: Wednesday THU: Thursday FRI: Friday SAT: Saturday

following sequence: Calendar Screen \ Seconds Screen \ Current Time Screen.

Month.Day

PM indicator (no indicator for AM)

Hour

Calendar Screen

Day of the Week

2-second interval

Seconds ScreenCurrent Time Screen

Seconds

Minutes

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.

Long-

Watch

wave time calibration signal

Signal data

Time data

Internally

Transmitter

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.

Signal is received using built-in antenna.

Watch decodes received data and converts it to time data.

Decode

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 a long wave signal transmitted 24 hours a day from the Mt. Otakadoya transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane transmitter (60kHz) 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.

Note that transmission of the standard wave may be interrupted occasionally due to maintenance, lightening, etc.

World Time Mode Alarm Mode

City Code

Current Time in Selected City

Alarm

• Alarm off

Hourly Time Signal

• Hourly Time Signal off

Hand Setting Mode Stopwatch Mode

Mode Indicator

Elapsed Time

Reception Range

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 Time setting.

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

Home City

TYO

LAX, DEN, CHI, NYC

Japan Transmitter

Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)

Fort Collins, Colorado signal

1000km

Locations

Mt. Hagane

(60kHz)

• Under optimum conditions, the calibration signal should be receivable up to 1,000 kilometers from the transmitter. Note that the wave is relatively weak at distances greater than 500km, so reception may be poor at long distances.

500km

1000km

500km

Mt. Otakadoya

(40kHz)

U.S. Transmitter Location

• Under optimum conditions, the calibration signal should be

Transmitter

3000km

1000km

Fort Collins

receivable up to 3,000 kilometers from the transmitter. Note that the wave is relatively weak at distances greater than 1,000km, so reception may be poor at long distances.

• Geographic contours, nearby buildings, seasonal conditions, 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.

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.

Near high-voltage lines

Next to a household appliance or office equipment (TV, speaker, fax, computer, cell phone, etc.)

Near mountains

Operation Guide 3390

Receiving the Calibration Signal

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

• Auto receive (Reception is performed automatically at midnight, 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 side, where the antenna is located) is facing approximately in the direction of the signal transmitter. Keep the watch 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.

❚

Time Required for Reception

A calibration signal receive operation takes anywhere from about two to six minutes.

• Note that when “AUTO” (Auto Select) is specified as the transmitter selection mode, signal reception can take up to 12 minutes.

• See “Configuring Auto Receive Settings” for more information.

❚

To perform manual receive

In the Timekeeping Mode, hold

down the

D button for about

two seconds.

• The watch will beep and

reception will start. An indicator will appear on the display to indicate reception conditions.

❚

To interrupt reception

Press the

D button.

• 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 that the adjustment was performed.

Reception Error (ERR Indicator)

The watch does not adjust its current time setting, and displays “ERR” when signal reception is unsuccessful for some reason.

• The watch will return to the Timekeeping Mode automatically if you do not perform any operation for about one or two minutes.

❚

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.

Unstable

• 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.

Receive Indicator

Stable

❚

To view the last reception date and time

In the Timekeeping Mode, press the

• This causes the display to start cycling through the “ ” screen, last reception date screen, and last reception time screen at two-second intervals.

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

• The watch will return to the Timekeeping Mode automatically if

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

D button.

Last Reception Date

Last Reception Time

Configuring Auto Receive Settings

Use the procedure below to turn auto receive of the time calibration signal on or off. When TYO (Tokyo) is selected as your Home City, you can also specify the transmitter selection mode, which controls which Japanese transmitter signal should be used for time calibration.

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

• The initial factory default settings for auto receive are Home City = TYO (Tokyo); Auto Receive = On; Transmitter = AUTO

• The following procedure can be performed only when TYO, LAX, DEN, CHI, or NYC is selected as the Home City.

❚

To configure auto receive settings

1. In the Timekeeping Mode,

• This will cause the display to

• The watch will return to the

2. Hold down the

• This will cause the currently

press the

D button.

start cycling through the last reception date and time screens.

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

A button

for about two seconds.

auto receive setting to flash on the display.

3. Press the

4. When the setting is the

• This will exit the setting

• To return to the Timekeeping

• The watch will return to the

D button to

cycle through the available auto receive settings.

way you want, press the

A button.

screen and return to the last reception date and time screens.

Mode, press the D button again.

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

Auto Receive Settings when the Home City is TYO

• AUTO

Auto receive turned on with automatic selection of either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz), whichever is strongest.

• 40

Auto receive turned on for the Mt. Otakadoya signal (40kHz).

• 60

Auto receive turned on for the Mt. Hagane signal (60kHz).

• OFF

Auto receive turned off.

Auto Receive Settings when the Home City is NYC, CHI, DEN, or LAX

• ON

Auto receive turned on for the Ft. Collins, Colorado signal.

• OFF

Auto receive turned off.

Operation Guide 3390

Calibration Signal Reception Precautions

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

• When a time calibration signal is received, the watch corrects its digital time setting first, and then adjusts the analog time setting accordingly. In order to ensure that the analog time matches the digital time, make sure you adjust the analog time to match the digital time before signal reception is performed.

• Pressing any button while auto reception 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, seasonal conditions, 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.

The auto receive ON/OFF settings don’t appear when configuring auto receive settings.

• Auto receive ON/OFF settings do not appear on the display unless TYO (Japan), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles) is selected as the Home City. Use the procedure under “To configure home time settings” to select your correct Home City.

The auto receive AUTO, 40, and 60 settings do not appear when configuring auto receive settings.

• The AT, JP40, and JP60 transmitter selection mode options are available only when TYO (Tokyo) is selected as the Home City code. Use the procedure under “To configure home time settings” to select your correct Home City.

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 its 12 o’clock position facing in the general direction of the transmitter.

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 its 12 o’clock position facing in the general direction of the transmitter.

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.

• This watch is designed to adjust its current time setting in accordance with the calibration signal transmitted in Japan and the United States only. It operates like a standard (non-radio controlled) watch outside of the range 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 alarm starts to sound 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.

• Check the auto signal reception setting whenever you have problems with signal reception or when the time setting produced by signal reception is incorrect.

• The initial factory default configuration of the reception settings

are shown below. You do not need to change these settings if you use the watch in Japan.

Auto Receive

Home City

Summer Time

Auto Japan transmitter select (40kHz/ 60kHz)

Tokyo

Auto switching in accordance with signal data

Troubleshooting

The watch cannot receive the time calibration signal.

• Is the signal being transmitted? Though the Japanese calibration signal (Call Sign: JJY) is continually transmitted by the National Institute of Information and Communications Technology (NICT) in theory, it may sometimes be interrupted for periodic maintenance work, or because of lightening or other problems.

• Are you within the reception range of a transmitter? See “Reception Range” 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” for more information.

• Do you have the correct Home City code selected? Remember that auto receive is not performed unless TYO (Japan), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles) is selected as the Home City. Select the correct Home City code using the procedure under “To configure home time settings”.

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

• Is the watch in any mode other than the Timekeeping Mode or World Time Mode during the auto receive times (midnight, 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.

Face Illumination

Pressing the B button in any mode (except when a flashing setting screen is displayed) illuminates the face of the watch for easy reading in the dark.

• You can use the procedure under “To specify the illumination duration” to configure the illumination duration as approximately 1.5 seconds or 3 seconds.

Important!

• The light may be difficult to see if you turn it on under bright sunlight.

• If you press a button that sounds a confirmation tone to sound or if an alarm operation starts while the face is illuminated, illumination will turn off.

• Illumination is disabled while a manual time calibration signal receive operation is in progress.

❚

To specify the illumination duration

1. In the Timekeeping Mode,

hold down the for about two seconds.

• This will cause your city code to flash on the display.

A button

City Code

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

• 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 slightly off (within one second).

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

• Do you have summer time (DST) turned on (ON)? Use the procedure under “To configure home time settings” to turn off summer time.

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

• Is the correct city code selected for your Home City? If you are in Japan, you should have TYO selected for your Home City. For other areas, select the correct Home City code using the procedure under “To configure home time settings”.

2. Press the

3. Press the

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

• The watch will also exit the setting screen automatically if you

C button three

times to display the flashing seconds count.

(3 times)

B button to

toggle the illumination duration between about

1.5 seconds ( indicator) and 3 seconds ( indicator).

button to exit the setting screen.

do not perform any operation for about two or three minutes.

Seconds

Operation Guide 3390

World Time Mode

World time lets you display the current time in any one of 30 cities (29 time zones) around the world.

• When you enter the World Time Mode, the screen for the city that was displayed when you last exited the mode appears first.

• The seconds count in the World Time Mode is linked with the Timekeeping Mode seconds count.

• The same 12-hour/24-hour format you select for the Timekeeping Mode time is also applied in the World Time Mode.

Important!

If the World Time Mode time is incorrect, correct the setting of the current time or change to another Home City in the Timekeeping Mode.

• For information about configuring timekeeping settings, see “To configure home time settings”.

❚

To search for a city code

In the World Time Mode, press the

• This scrolls westward through the available city codes. A short while after a city code appears, the display will change to show the current time in that city.

• Holding down the D button scrolls at high speed.

City Code

Current Time in Selected City

• Pressing the A button in the World Time Mode displays the city code of the currently selected city for about two seconds.

• Selecting a time zone that does not have a city code displays the GMT time differential for that zone.

D button.

(Scrolls westward)

Stopwatch Mode

The stopwatch measures elapsed time in units of 1/100 second up to 59 minutes, 59.99 seconds (60 minutes total). When the maximum limit is reached, the elapsed time automatically returns to zero and timing continues from there.

❚

To perform elapsed time measurement

In the Stopwatch Mode, press the stop elapsed time measurement.

(Split/Reset)

D button to start and

❚

Stopwatch Mode Display Screens

• Elapsed Time Screen

The display shows the minutes and seconds.

Using Summer Time (DST)

Summer time, or Daylight Saving Time (DST) as is it is known in some countries, calls for setting clocks ahead one hour during the summer season. Note that the use of summer time depends on the country and even the local area.

❚

To turn summer time on or off

1. In the World Time Mode,

2. Hold down the

• This toggles summer time on

• The “DST” indicator appears

• You can turn summer time on

❚

Elapsed Time Measurement

Start Stop Reset

Pressing the A button while timing is stopped resets the stopwatch to all zeros.

Cumulative Time Measurement

Pressing the D button to restart the stopwatch without resetting it to all zeros causes the elapsed time measurement to resume from where it was last stopped.

❚

Split Time Measurement

Start Record Split Clear Split Stop Reset

Pressing the A button while timing is being performed displays the split time screen, but timing continues internally.

• Changing to another mode while a split time is displayed clears the split time operation.

use the

D button to

display the screen for the city code whose summer time setting you want to change.

A button

for about two seconds.

and off.

on the display and timekeeping is advanced by one hour when summer time is turned on.

or off independently for each World Time Mode city. Note, however, that you cannot turn on summer time for the “GMT” city code.

DST Indicator

World Time City Code List

City

GMT

–11

–10

–9

–8

–7

–6

–5

–4

–3

–2

–1

Greenwich Mean Time

City Name

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New York

Caracas

Rio de Janeiro

London

Paris

Berlin

Athens

Cairo

Code

Differential

– – –

HNL

ANC

LAX

DEN

CHI

NYC

CCS

RIO

– – –

GMT

LON

PAR

BER

ATH

CAI

• The contents of the above table are current as of December 2003.

• Time differentials in the above table are in accordance with

Universal Time Coordinated (UTC).

City

Code

JRS

JED

THR

DXB

KBL

KHI

DEL

DAC

RGN

BKK

HKG

SEL

TYO

ADL

SYD

NOU

WLG

GMT

Differential

+3.5

+4.5

+5.5

+6.5

+9.5

+10

+11

+12

City Name

Jerusalem

Jeddah

Teheran

Dubai

Kabul

Karachi

Delhi

Dakar

Yangon

Bangkok

Hong Kong

Seoul

Tokyo

Adelaide

Sydney

Noumea

Wellington

(Start/Stop)

Minutes Seconds

• Paused Elapsed Time Measurement Screen

When elapsed time measurement is paused, the display alternates between a minute/second screen and a 1/100 second screen at 2second intervals.

2-second interval

Minutes Seconds

1/100 Second

❚

1st and 2nd Place Finishers

Start 1st Finish

Pressing the D button while the split time screen is on the display stops elapsed time measurement, and leaves the split time screen on the display. Press the A button to exit the split time screen and display the elapsed time when the measurement was stopped.

Split Time Screen

The split time screen cycles alternately cycle through the split indicator, a minute/second screen, and a 1/100 second screen.

(Displays time of 1st finisher.)

2nd finish Displays time of 2nd finisher. Reset

Split Indicator

Minutes

Seconds

1/100 Second

Operation Guide 3390

Using the Alarms and Hourly Time Signal

You can set the daily alarms in 1-minute increments. The watch beeps for 10 seconds when the current time in the Timekeeping Mode reaches the alarm time you set. The Hourly Time signal causes the watch to beep every hour on the hour.

❚

To display the alarm screen

In the Alarm Mode, press the between the alarm screen and the Hourly Time Signal screen.

When you enter the Alarm Mode, the screen that was displayed when you last exited the mode appears first.

Alarm Screen

• Alarm off

❚

To turn the alarm on or off

1. In the Alarm Mode, use the

alarm screen.

2. Press the

❚

To stop the alarm beeper

Press any button.

A button to toggle the alarm

on (“ ” displayed) or off (“ ” displayed).

Alarm Off

D button to toggle the display

Hourly Time Signal Screen

• Hourly Time Signal off

D button to display the

Alarm On

Alarm Time

❚

To set the alarm time

1. In the Alarm Mode, press

the

D button to display

the alarm screen.

2. Hold down the

for about two seconds.

• This will cause the hour digits of the displayed alarm time to flash.

• Displaying the setting screen automatically turns on the alarm.

❚

To turn the hourly time signal on or off

1. In the Alarm Mode, use the

Hourly Time Signal screen.

2. Press the

(“ ”) or off (“ ”).

Hourly Time Signal Off

A button

A button to toggle the Hourly Time Signal on

Hour

D button to display the

Hourly Time Signal On

(Forward)

Minutes

(Back)

5. Use the

buttons to change the minute setting.

• Holding down either button changes the setting at high speed.

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

button.

• This exits the setting screen.

• The display also will exit the setting screen automatically if

you do not perform any operation for about two or three minutes.

3. Use the

• Holding down either button

• When setting the hour, make

• The same 12-hour/24-hour

4. Press the

• This causes the minute digits

D (+) and

buttons to change the hour setting.

changes the setting at high speed.

sure you specify AM (no indicator) or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time.

format you select for the Timekeeping Mode home time is also applied in the Alarm Mode.

C button to

select the minute setting.

to flash.

B (–)

Configuring Home Time Settings

Home time settings include your Home City (the city where you will normally use the watch), the current time and date in your Home City, and other settings.

• Use the Timekeeping Mode to configure home time settings.

If you are planning to manually adjust both the digital and analog settings, be sure to adjust the digital setting first.

❚

To configure home time settings

1. In the Timekeeping Mode,

hold down the for about two seconds.

• This will cause the city code currently selected as the Home City to flash on the display.

A button

City Code

2. Press the

scroll through the city codes until the one you want to select is displayed.

• See the “World Time City Code List” for information about city codes.

• Holding down either button scrolls at high speed.

3. When the city code you

want is displayed, press

the

C button.

• This will display the summer time (DST) setting screen.

D (+) and

D button to

B (–)

TYO=Tokyo

(Back)

(Forward)

❚

To test the alarm

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

Operation Guide 3390

4. Press the

• AUTO

This setting enables the auto summer time setting, which turns summer time on or off in accordance with the received time calibration signal.

• This setting uses Japan summer time data when TYO is

selected as the Home City, and U.S. summer time data when NYC, CHI, DEN, or LAX is selected as the Home City.

• Note that “AUTO” can be selected only when TYO, LAX, DEN, CHI, or NYC is selected as the Home City.

• OFF

This setting turns off summer time and returns to normal timekeeping.

• ON

This setting turns on summer time and advances the current time by one hour. The DST indicator appears on the display when this setting is selected.

9. When all of the settings are the way you want, press the

• This exits the setting screen.

• The display also will exit the setting screen automatically if

Digital-Analog Synchronization

After adjustment of the digital time, the watch automatically adjusts its analog setting to match.

• When adjusting the analog time, the hands move clockwise.

• Depending on how many hours different the digital and analog

time settings are, it may take some time for the analog hand setting procedure to be finished.

D button to

cycle through the available summer time (DST) settings until the one you want to select is displayed.

A button.

you do not perform any operation for about two or three minutes.

5. When the summer time

setting is the way you want, use the cycle the display through the settings shown below.

Home City

Code

Day

C button to

Summer Time

12/24-hour

Timekeeping

Seconds

HourMinuteMonth Year

Adjusting the Analog Time Setting

You can use the Hand Setting Mode to manually adjust the analog time when it does not match the digital time.

1. In the Hand Setting Mode,

hold down the for about two seconds.

• This will cause the hour and minute setting of the digital time to flash on the display.

2. Use the

adjust the hour and minute hands so they match the digital time.

• Each press of the D button moves the hands 20 seconds clockwise.

• Holding down the D button moves the hands at high speed.

A button

D (+) button to

(Forward)

6. While the 12/24-hour

timekeeping setting is flashing, press the button to toggle between 12-hour (“12H”) and 24-hour (“24H”) timekeeping.

7. While the seconds are

selected, press the button to reset them to 00 in accordance with the time signal on the radio, TV, etc.

• Pressing the D button while the seconds count is in the range of 30 to 59 resets it to 00 and also adds 1 to the minutes. Pressing the D button in the range of 00 to 29 resets the seconds count without changing the minutes.

• Pressing the B button while the seconds count is flashing changes the face illumination duration. See “Face Ilumination” for more information.

High-speed Lock

• While holding down the D button to start high-speed clockwise movement of the hands, press the B button to lock the high-speed hand movement. You can then release the buttons.

• High-speed hand movement will continue until it completes a 12-hour cycle, or until you press any button to stop it.

• High-speed hand movement will also stop momentarily if an alarm starts to sound. High-speed movement will resume after the alarm stops.

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

button.

• This exits the setting screen and automatically synchronizes the minute hand with the current seconds count.

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

Indicates 12-hour or 24-hour timekeeping.

Seconds reset to 00.

8. While the hour, minutes,

year, month, or day setting is flashing, use the button to change the setting.

• Holding down the D button changes the setting at high speed.

Use the

C button to select each of the settings and the

D button to change them.

• When setting the hour, make sure you specify AM (no indicator) or PM (P) correctly, or that you specify the correct 24-hour time.

• You can set a year in the range of 2000 to 2099. The day of the week is set automatically in accordance with the date you set.

• The watch automatically makes adjustments for leap years and month lengths.

D (+)

MinutesHour

(Forward)

Casio 3390 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Modes and Display Screens

How a Radio-controlled Watch Works

Face Illumination

World Time Mode

Stopwatch Mode

Using the Alarms and Hourly Time Signal

Configuring Home Time Settings