G-Shock GW-002BJ-1 User Manual

MA0410-EA

Operation Guide 2914

Power Saving LCD Types

Power Saving causes the watch to enter a sleep state automatically and save power whenever the watch is left in the dark. The Power Saving feature of the watch is turned on at the factory.

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

❚

How the sleep state works

Display sleep state

The display sleep state is triggered whenever the watch is left in the dark for about one hour between the hours of 10:00 p.m. and 6:00 a.m.

• The display sleep state causes the display to go blank, except for a flashing Power Saving indicator. The alarm and the hourly time signal continue to operate normally while the watch is in the display sleep state.

• The watch will not enter the sleep state if it is in the Timer Mode or the Stopwatch Mode.

Power Saving Indicator

Function sleep state

The function sleep state is triggered whenever the watch is left in the dark for six or seven days. The power saving indicator stops flashing and remains on the display to indicate the function sleep state.

• The alarm and the hourly time signal are disabled while the watch is in the function sleep state, and time calibration signal auto receive is not performed.

• Digital timekeeping functions continue to operate normally in the function sleep state.

❚

To recover from the sleep state

Move the watch to a brightly lit location or press any button. The watch will also recover from the sleep state if you angle it towards your eyes for reading (see “To illuminate the display with the auto light switch”).

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

❚

To turn Power Saving on and off

Use the procedure under “Configuring Home Time Settings” to turn Power Saving on or off.

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

Modes and Display Screens

Each press of the

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

PM Indicator (Appears with times between noon and midnight.)

Hour, minute, second

(Mode switching)

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

Timekeeping Mode

Graphic Dial

Button

(Display Illumination)

Button

Battery Indicator

Receive Indicator

(Screen Switching)

Button

Month/Day Day of the Week

This watch is available with either of two different LCD types: light background with dark figures (black-on-white) or dark background with light figures (white-on-black). Note that all of the samples in this manual show the black-onwhite type LCD.

Black-On-White White-On-Black

Black indicates “ON”.

White indicates “ON”.

World Time Mode Alarm Mode

Current Time in Selected City

City Code

Stopwatch Mode Timer Mode

Alarm Time

Alarm Number

Timer Time

Changing Display Screen Contents

Each press of the button toggles the lower display contents between the date (month/day) and the day of the week.

Days of the Week

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

• A segment appears with the passage of each second of the current minute.

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

“Receive Indicator”.

Mode Indicator

Elapsed Time

Mode Indicator

Operation Guide 2914

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.

Important!

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.

❚

Flashing Recover Indicator

If you use the light or alarm a number of times during a short period, a recover (RECOV) 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

Normal operation will return after the battery recovers.

Recover Indicator

Display Illumination

An EL (electroluminescent) panel is used to illuminate the display of the watch for easy reading in the dark. An auto light switch automatically illuminates the display when you angle the watch towards your eyes for reading.

❚

To illuminate the display manually

Press the

L button in any

mode to illuminate the display of the watch.

• You can use the procedure under

“To specify the illumination duration” to select either

1.5 seconds or 2.5 seconds for the illumination duration.

• Pressing the L button illuminates the display regardless of

whether the auto light switch is on or off.

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.

Battery Level Indicator

Black-On-

White-On-

White

Black

Normal operation enabled.Level 1

Level 2

Level 3

Level 4

• 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.

• Even after the battery drops to Level 4, you will be able to resume normal operation by charging the battery.

• When charging from Level 4, the display will start operating when the battery reaches Level 3. At this time you will be able to configure time and date settings, but you should keep the watch exposed to light until the battery reaches Level 2 or Level 1.

❚

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 the Level 3 indicator starts to flash.

❚

To illuminate the display with the auto light switch

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

• The auto light switch does not illuminate the display 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 2.5 seconds.

❚

To turn the auto light switch on and off

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

Normal operation enabled.

Digital display, illumination, alarms, tones (alarms, hourly time signal), and signal reception disabled.

All functions, including timekeeping, disabled.

Auto Light Switch On Indicator

❚

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 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.

❚

To charge the battery

Point the solar panel (display) 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.

❚

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 display is illuminated, illumination will turn ofφ.

• Display illumination does not work while you are performing a time calibration signal manual receive operation.

• You may hear humming sound from the watch while the display is illuminated. This is caused by vibration of the EL panel used of illumination, and does not indicate malfunction.

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

At least 40 degrees

❚

Charging Guide

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

Daily Use (All time values are approximate.)

• Display Illumination: 1.5 seconds

• Alarm: 10 seconds

• Signal reception: 16 minutes

• Display On: 18 hours

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 display to illuminate when your sleeve covers the display of the watch.

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

• The display remains illuminated for the currently set duration (1.5

or 2.5 seconds) only, even if you leave the watch angled towards your face.

• The auto light switch is automatically disabled whenever battery power is at Level 3 or loweρ.

• The display 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 display 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

101 hours

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

2 hours

5 hours

9 hours

– – – – – –

Approximate

Exposure

Time

5 minutes

24 minutes

48 minutes

8 hours

6 hours22 hours

30 hours109 hours

61 hours222 hours

❚

To specify the illumination duration

1. In the Timekeeping Mode,

hold down two seconds.

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

2. Press the

times to display the flashing seconds count.

A for about

C button three

Home City Code

(3 times)

Seconds

Operation Guide 2914

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

B button to

toggle the illumination duration between about

1.5 seconds ( indicator) and 2.5 seconds ( indicator).

button to exit the setting screen.

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-

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 time calibration signal may be interrupted occasionally due to maintenance, lightning, etc.

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 City 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, SEL

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.

• 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

1000km

500km

Mt. Otakadoya

(40kHz)

• Under optimum conditions, the calibration signal should be

Transmitter

U.S. Transmitter Location

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.

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.

Near high-voltage linesAmong 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.

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 (3 times per day)

When the Home City setting is TYO or SEL, the time calibration signal is received automatically at 1:00, 2:00, and 3:00 each morning.

• If both the 2:00 and 3:00 receive operations are unsuccessful, a receive operation is performed at 4:00. If receive is still unsuccessful, it is performed again at 5:00.

• If all five of the above receive operations are unsuccessful, a receive operation is performed again at midnight the following day.

When the Home City is NYC, CHI, DEN, or LAX, auto receive is performed at midnight, and at 1:00 and 2:00 in the morning.

• If both the 1:00 and 2:00 receive operations are unsuccessful, a receive operation is performed at 3:00. If receive is still unsuccessful, it is performed again at 4:00.

• If all five of the above receive operations are unsuccessful, a receive operation is performed again at 5:00.

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

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.

+ 5 hidden pages