Casio 4343, MA0804-EG User Manual

MA0804-EG

Before using the watch...

Operation Guide 4343

Expose the watch to light

Your watch runs on electrical power generated from light and stored by a chargeable battery. Long-term storage of the watch can cause the battery to run low, so be sure to expose the watch to light for some time before using it for the first time. See “Solar Charging” for more information.

Low Battery Alert

When secondary battery power is low, the second hand of the watch will start to jump at 2-second intervals to let you know that charging is required.

• See “Low Battery Alert” for more information.

Jumps 2 seconds

Modes and Indicators

Chronograph Mode

Second Hand

• Reset

The stopwatch performs 1/20-second elapsed time measurement up to 23 hours, 59 minutes, 59.95 seconds (24 hours).

Start/Stop

Press the button to start and stop the chronograph.

Chronograph Reset

To exit the Chronograph Mode, the chronograph must be reset by pressing the button while the chronograph is stopped. The chronograph is reset when the second hand, chronograph hands, and 1/20second hand are all at 12 o’clock.

• Start

• Stop

Chronograph Hands (Hour, Minute)

1/20-second Hand (First minute only.)

(While chronograph is reset.)

Power Saving

Power Saving causes the watch to enter a sleep state automatically and stop movement of the analog hands in order to save power whenever it is left in the dark. The watch will exit the sleep state if you expose it to light or perform any button operation.

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

How the sleep state works

Sleep Level 1

The display sleep state is triggered whenever the watch is left in the dark for about one hour between the hours of 10 p.m. and 6 a.m.

• The second hand stops.

• The hour and minute hands, and the date indicator continue to

operate normally.

• Alarms and the hourly time signal continue to operate normally.

Sleep Level 2

Sleep Level 2 is triggered whenever the watch is left in the dark while in Sleep Level 1 for six or seven days.

• The hour and minute hands, and the date indicator stop at their current positions.

• Auto Receive is disabled.

• Alarms and the hourly time signal are disabled.

• Digital timekeeping functions continue to operate normally.

Timekeeping Mode

Hour Hand

Indicator Hand

Button

Hour Hand (24-hour)

Button

Second Hand (Moving)

❚

To check the reception result

Press the button. The indicator hand will move to “Y” (successful) or “N” (unsuccessful) to indicate the reception result.

❚ To trigger a receive operation manually

Hold down the button for about two seconds until the indicator hand moves to the “READY” position. This will start signal reception.

For more information, see “How a Radiocontrolled Watch Works”.

Minute Hand

Button

(Chronograph Mode)

Button

Date

Y: Successful

N: Unsuccessful

You can use the button operations shown below to enter the Timekeeping Mode, World Time Mode, or Alarm Mode directly.

World Time Mode

• The indicator hand points to the city code.

• World Time lets you display the current time in any one

of 27 cities (29 time zones) around the world.

City Code (New York)

ON = On

• On/Off

Alarm Mode

OFF = Off

World Time (Hour, Minute)

Alarm Time (Hour, Minute)

❚

To search for a city code

Use the button to scroll clockwise through the city codes around the face.

• The indicator hand points to ON or OFF.

• Use this mode to set the alarm time and to turn the

alarm on or off.

❚

To turn the alarm on or off

Press the button to toggle the alarm on and off.

Operation Guide 4343

Solar Charging

Your watch runs on electrical power generated from light and stored by a chargeable battery. To ensure stable operation, make sure that the watch is exposed to light as much as possible.

• Whenever you are not wearing the watch on your wrist, position it so the face (solar cell) is pointed in the direction of a source of bright light.

Solar Cell

Leave the watch under fluorescent lighting, near a window, etc.

Light

Low Battery Alert

When secondary battery power is low, the second hand of the watch will start to jump at 2-second intervals to let you know that charging is required.

Normal Operation Disabled StateLow Battery Alert

When battery runs low

Jumps 1 second.

• Even if the battery level drops to the point that timekeeping stops, you still will be able to recharge the battery and use the watch again.

• When you recharge the battery after it drops to a level where timekeeping stops, the hands will move automatically to the current time

setting.

• Try to keep the watch exposed to light as much as possible during normal use.

Jumps 2 seconds.

At midnight, the date indicator will change to 1 (which is the home position).

Important!

The following functions are disabled when battery power is low.

• Auto receive and manual receive

• Alarm beeper

• When wearing the watch, try to keep your sleeve from blocking its

face, where the solar cell is located.

Charging efficiency is reduced significantly even if the face of the watch is covered only partially by your sleeve.

Hands stop at 12 o’clock.

Home Position

If power drops even more...

The second, hour, and minute hands all stop at 12 o’clock.

How the solar cell and battery work

When exposed to light

Light

Solar cell (Converts light to power.)

Electrical Energy

Rechargeable Battery

Power supplied to watch

When not exposed to light

Your watch continues to operate even when it is not exposed to light. Leaving the watch in the dark can run down its battery and cause functions to become disabled.

Charge

Rechargeable Battery

Power supplied to watch

Discharge

Charging Guide

• Required Charging Time for One Day of Operation

Based on six minutes of signal reception and 10 seconds of alarm per day.

Exposure Level (Brightness)

Outdoor Sunlight (50,000 lux)

Sunlight through a Window (10,000 lux)

Overcast Daylight through a Window (5,000 lux)

Indoor Fluorescent Lighting (500 lux)

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

• Approximate Charge Times Required to Advance to a Higher Level

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight through a

Window (10,000 lux)

Overcast Daylight through

a Window (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.

Until Hand Movement

Charging Time

Restarts

1 hours

2 hours

4 hours

35 hours

Charging Time

8 minutes

30 minutes

48 minutes

8 hours

Until Full Charge

21 hours

77 hours

– – –

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

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

Operation Guide 4343

How a Radio-controlled Watch Works

What is a radio-controlled watch?

A 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

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.

❚

To check the result of the last receive

Long-wave time calibration signal

Signal data

Time data

Watch

Internally

operation

In the Timekeeping Mode, press the Receive Result Mode, which displays the last receive result.

• The indicator hand will move to “Y” (if the last reception was successful) or “N” (if the last reception was unsuccessful).

• Press the A button to return to the Timekeeping Mode.

• The watch also will return to the Timekeeping Mode automatically

if you do not perform any operation for about five seconds.

built-in antenna.

Watch decodes received data and converts it to time data.

Decode

Time is adjusted according to time data.

A button to renter the

Y: Successful

N: Unsuccessful

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.

• Time calibration signal frequencies and transmitter locations are subject to change.

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.

❚

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

Receiving the Calibration Signal

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

Auto Receive

Up to six times per day (Midnight, 1:00, 2:00, 3:00, 4:00, and 5:00 a.m.)

• As soon as one auto receive is complete, all subsequent auto receives for that day are cancelled.

Manual Receive

You initiate signal reception by pressing a button.

Hold down the about two seconds.

• The indicator hand will indicate

the result of the reception, the watch will beep, and the indicator hand will move to “READY”.

❚

To interrupt a receive operation

Press any button.

A button for

READY

At the start of the receive operation

• The indicator hand will move to “READY”.

• The hour and minute hands will remain at their normal positions.

• The second hand will stop at “0”.

While reception is in progress

• The indicator hand will move to “WORK”.

• The hour and minute hands will remain at their normal positions.

• Do not perform any watch operations while signal reception is in

progress.

Y: Successful

WORK

N: Unsuccessful

WORK

When reception is complete (Signaled when the watch beeps.)

• When the receive operation is successful, the indicator hand moves to “Y”, the watch adjusts its time, and then the indicator hand returns to its second hand operation after about one or two minutes.

• When the receive operation fails, the indicator hand moves to “N” and then the watch returns to the unadjusted time after about one or two minutes.

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 “Changing the Home City Setting”. See the “World Time City Code List” for information about city codes.

Home City (Supports signal reception)

TYO, HKG

HNL, ANC, LAX, DEN, CHI, NYC

• Signal reception is possible in Hong Kong (HKG), Honolulu (HNL), and Anchorage (ANC) when reception conditions are good.

Transmitter Location

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

Ft.Collins

1000km

Receivable Transmitter

Transmitter Location

The last receive status changes each time a new time calibration signal receive operation is performed.

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

Signal reception normally takes anywhere from about two to seven minutes. Under certain signal conditions however, the receive operation can take as long at 14 minutes.

Mt. Hagane

(60 kHz)

Certain conditions can make reception impossible even when the watch is within one of the reception ranges shown above. Signals become weaker outside of the smaller circles indicated by dashed lines, so the reception environment has a greater effect on signal reception.

• The following also can affect signal reception: geographic contours, structures, weather, climate, time of day (afternoon, evening), noise.

500km

1000km

500km

Mt. Otakadoya

(40 kHz)

3000km

1000km

Ft.Collins

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