Casio MA0410-EA User Manual

MA0410-EA

Operation Guide 3731

Power Saving

The Power Saving feature of the watch is turned on at the factory.

• Power Saving causes the watch to turn off the display automatically and enter a sleep state to save power whenever the watch is left in the dark.

• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.

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How the sleep state works

• Display sleep state

The display sleep state is triggered whenever the watch is left in the dark for three or four days.

• The display goes blank in the display sleep state.

Alarms and the hourly time signal continue to operate normally, while the watch is in the display sleep state. Even when the watch is in the sleep state, digital-analog time synchronization and auto signal receive are both performed.

• Function sleep state

The function sleep state is triggered whenever the watch is left in the dark for four days.

• Alarms and the hourly time signal are also disabled while the

watch is in the function sleep state.

• In the function sleep state, analog timekeeping is disabled, so

digital-analog time synchronization is not performed.

• Digital timekeeping functions continue to operate normally in

the function sleep state.

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To recover from the sleep mode

Place the watch in an area that is well-lit, press any button, or angle the watch towards your face to illuminate the display using the Auto Light (“To illuminate the face with the auto light switch”).

• It can take up to two seconds before the display re-appears after you place the watch in a well-lit area.

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To turn power saving on and off

See the procedure under “To configure Home Time Zone settings” for information about turning off power saving.

Leaving the watch in a drawer or anywhere else it is dark can cause the power saving mode to trigger in order to conserve battery power.

Modes and Display Screens

Each press of the

• The watch will automatically revert to the Timekeeping Mode if you leave the Alarm (except for the target alarm remaining time screen), Recall, 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.

• The analog hands are not shown in the face illustrations shown in this User’s Guide.

Timekeeping Mode

Month

1/20 Second Stopwatch Time

(Light)

24-hour Dial

Day

Year

Button

Minute Hand

Button

Receive Indicator

Day

Month

Days of the Week

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

• For details about the battery level indicator, see “Battery Level Indicator”. For details about the receive indicator, see “Receive Indicator”.

Hand Setting Mode

Mode Indicator

Hour Hand

(Screen Switching)

Button

Battery Level Indicator

Button

(Mode Switching)

Second Hand

Changing Display Screen Contents

Each press of the button cycles display contents in the sequence shown below.

Day of the Week

PM indicator (no indicator for AM)

Seconds

Hour

Minutes

Stopwatch Mode Recall Mode

Hands move to 12 o’clock.

Elapsed Time

Moves to current level.

Returns to current seconds position.

Alarm Mode

Alarm Number

Alarm Time

TIME DIFFERENCE

Dual Time Mode

Time Zone

Time in Current Time Zone

Operation Guide 3731

Power Supply

The power supply of this watch uses a solar cell to generate electrical power, which is stored by a rechargeable battery. Using or storing the watch where it is not regularly exposed to light, or allowing it to be blocked from light by your sleeve for long periods as you are wearing it can cause the power of the rechargeable battery to run down. To ensure stable operation, be sure to allow the watch to be exposed to light as much as possible when you are wearing or storing it.

Note that all data in memory and all settings are cleared whenever you allow the level of the rechargeable battery to drop to Level 4.

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Battery Level Indicator

Level 1

Level 2

Level 3

Level 4

Normal operation enabled.

Digital display, illumination, alarms, tones (alarms, hourly time signal), signal reception, digital-analog synchronization disabled.

All functions, including timekeeping, disabled.

Face Illumination

An LED light is used to illuminate the face of the watch for easy reading in the dark. An auto light switch automatically illuminates the face when you angle the watch towards your eyes for reading.

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To illuminate the face manually

Press the

D button in any

mode (as long as a setting screen is not displayed) to illuminate the face of the watch.

(Light)

• Pressing the D button illuminates the face regardless of whether the auto light switch is on or off.

• You can use the procedure under “To specify the illumination duration” to configure the illumination duration as approximately

1.5 seconds or 2 seconds.

You may hear a faint rattling sound when you move the watch around. This sound is caused by the movement of a metal bulb that controls operation of the auto light switch, and does not indicate malfunction.

• In the Stopwatch Mode, the battery level indicator dial functions as the elapsed time minute hand.

• Exposing the watch to direct sunlight or other strong light may cause the battery level indicator to indicate a level momentarily that is higher than the actual battery level. Because of this, you should wait for a short while after charging to check the battery level indicator.

• Signal reception resumes when the battery is recharged to Level

• Even after the battery drops to Level 4, you will be able to resume normal operation by charging the battery. After the digital display appears, configure time and date settings.

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Start charging at Level 3!

Battery Level 3 indicates that remaining battery power is very low. Be sure to expose the watch to light for recharging as soon as possible after Level 3 is indicated.

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Flashing Recover Indicator

If you use the light or alarm a number of times during a short period, a recover (R) indicator flashes on the display and the following operations become disabled as battery power recovers.

• Display illumination,

• Alarm and hourly time signal

• Time calibration signal reception

• Analog-digital synchronization

Normal operation will return after the battery recovers.

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To illuminate the face with the auto light

Recover Indicator

switch

The auto light switch automatically illuminates the face whenever you angle the watch towards your eyes for reading, but only when it is dark.

• The auto light switch does not illuminate the face when surrounding light is bright.

You can use the procedure under “To specify the illumination duration” to configure the illumination duration as approximately 1.5 seconds or 2 seconds.

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To turn the auto light switch on and off

While any screen (besides a flashing setting screen) is on the display, hold down the D button for about two seconds to toggle the auto light switch on (auto light switch on indicator displayed) and off (no indicator displayed).

Auto Light Switch On Indicator

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Charging Precautions

Avoid charging the watch in the following locations, and anywhere else where the watch may become very hot.

• On the dashboard of an automobile parked in the sun

• Very close to an incandescent light source or other sources of

heat

• In a location exposed to direct sunlight for long periods or a location that is very hot

Note that the display panel may become black under very high temperatures. This is temporary, and the display will appear normal again at lower temperatures.

Depending on the light source you are using, the case of the watch may become quite hot during charging. Take care to guard against burn injury after charging.

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To charge the battery

Point the solar panel (face) of the watch at a light source.

• Remember that even a partial blockage of the solar cell reduces charging efficiency.

Example: Positioning the watch

Solar Cell

• The illustration shows the resin band model.

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Positioning Your Arm Correctly

With the watch on your wrist, position it level with the ground.

• You should be wearing the watch on the outside of your wrist when using the auto light switch.

• Make sure that the left (9 o’clock) and right (3 o’clock) sides of the watch are within ±15 degrees of being parallel with the ground. The auto light switch may not operate properly if the angle is greater.

Important!

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

• If you press any button or if an alarm operation starts while the face is illuminated, illumination will turn off.

Rotate your arm so the watch is angled at about 40 degrees, so you can read its face.

At least 40 degrees

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Charging Guide

Starting from a full charge, the watch should be able to continue operating for about five months without further charging under the conditions described below.

Daily Use (All time values are approximate.)

• Illumination: 1.5 seconds

• Alarm: 10 seconds

• Signal reception: 5 times

Making sure the watch is regularly exposed to light ensures stable operation.

• Charge Times Required to Advance to a Higher Level

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight Through a

Window (10,000 lux) Daylight Through a Window on

an Overcast Day (5,000 lux)

Indoor Fluorescent

Lighting (500 lux)

• Note that the above charging times are for reference only. Actual charging time depends on a variety of environmental factors.

Auto Light Precautions

• Frequent use of the auto light can run down the battery.

• The auto light switch may cause the face to illuminate when your

sleeve covers the face of the watch.

• The face may not illuminate immediately when you angle the watch towards your face. This does not indicate malfunction.

• The face remains illuminated for the currently set duration (1.5 or 2 seconds) only, even if you leave the watch angled towards your face.

• The face may illuminate unintentionally when you wear the watch on the inside of your wrist, when you shake your arm, or when you raise your arm. Be sure to turn off the auto light switch whenever you do not need face illumination.

• Keep the auto light switch turned off whenever you are wearing the watch on the inside of your wrist.

• Electro-static charge and magnetism can interfere with auto light operation and even make operation impossible. If this happens lower your arm to the starting position and then raise it again. If you still have trouble with illumination, try lowering your arm down to your side and then raise it to your face for reading.

Level 4 \ Level 3 \ Level 2 \ Level 1

Required Daily Charging Time

•

The following is the daily amount of charging required each day to support the operations under “Daily Use”.

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight Through

a Window

(10,000 lux)

Daylight Through a

Window on an Overcast

Day (5,000 lux)

Indoor

Fluorescent

Lighting (500 lux)

Approximate Exposure Time

1 hours

3 hours

5 hours

49 hours

– – – – – –

Approximate

Exposure

Time

5 minutes

24 minutes

48 minutes

8 hours

4 hours14 hours

20 hours71 hours

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To specify the illumination duration

1. In the Timekeeping Mode,

hold down the for about two seconds.

• This will cause the currently selected time zone to flash on the display, and the second hand to move to 12 o’clock.

2. Press the

times to display the flashing seconds count.

A button

C button three

(3 times)

Time Zone

Seconds

Operation Guide 3731

3. Press the

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

• The second hand will move to the current time as kept

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

B button to

toggle the illumination duration between about 2 seconds (● indicator) and

1.5 seconds (no indicator).

● indicator (Appears only on the setting screen.)

button to exit the setting screen.

internally, and resume normal movement from there.

do not perform any operation for about two or three 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-wave

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.

time calibration signal

Watch

Signal data

Time data

Internally

Signal is received using built-in antenna.

Watch decodes received data and converts it

Decode

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 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.

Note that transmission of the time calibration signal may be interrupted occasionally due to maintenance, lightning, etc.

Reception Range

This watch can be configured to select the strongest Japanese signal (40kHz Mt. Otakadoya signal or 60kHz Mt. Hagane signal), and use that one for calibration. is stronger.

1000km

500km

1000km

Mt. Otakadoya (40kHz)

Japan Transmitter 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.

• 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.

500km

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

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, 1:00, 2:00, 3:00 and 4:00 each morning.)

•

Manual receive (You initiate reception using

• 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.

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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.

B button operation.)

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Time Required for Reception

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

• Note that when “A” (Auto Select) is specified as the transmitter selection mode, signal reception can take up to 14 minutes.

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

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To perform manual receive

In the Timekeeping Mode, hold

down the

B button for about

two seconds.

•

The watch will beep and reception will start. The receive ( ) indicator will appear on the display to indicate reception conditions.

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To interrupt reception

Press the

B button.

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

When reception is successful

The watch will terminate reception and adjust the current time. Next it will beep and then display the date and time that the adjustment was performed.

• The receive indicator ( ) will remain on the display to indicate that reception was successful.

• The second hand will move to the correct position in accordance with the digital time, and resume normal movement from there.

Reception Error

The will display “ ” without adjusting the time setting when signal reception is unsuccessful for some reason.

•

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

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