G-Shock G-2100WC-7JR User Manual

Module No. 2234

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• In the Timekeeping Mode, Moon Data Mode, Sunrise/Sunset Mode or Alarm Mode, press

press

E to illuminate the display for about two seconds.

Timekeeping Mode

Moon Data Mode

Sunrise/Sunset Mode

TIMEKEEPING MODE

The settings you make in the Timekeeping Mode are very important, because they affect the Moon Data, Tide Graph, and Sunrise/Sunset functions. There are three setting screens in the Timekeeping Mode: the Time and Date Setting Screen, DST, GMT Differential, Point Name Setting Screen, and Longitude/Latitude, Lunar Tide Interval Setting Screen.

• For normal timekeeping, you need to set the time, and date, and turn daylight saving time (summer time) on or off.

• To use the Moon Data, Tide Graph, and Sunrise/Sunset functions, you must set the GMT differential, your current longitude and latitude, and the lunar tide interval on your point.

• If you do not operate any button for a few minutes while a selection is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically.

Month - Day

Moon graph

Tide graph

Day of week

Hour

Minutes

PM indicator

3.Press

C to move the selection around the display in the following sequence.

Seconds Hour

Day YearMonth

4.While the seconds digits are selected (flashing), press

00. If you press are reset to 00 and 1 is added to the minutes. If the seconds count is in the range of 00 to 29, the minutes count is unchanged.

5. While any other digits (besides seconds), are selected (flashing), press

crease the number or current number at high speed.

• While the 12/24-hour setting is selected, press formats.

• The day of the week is automatically set in accordance with the date.

• The date can be set with the range of January 1,1995 to December 31, 2039.

6. After you are finished making the settings you want, press

DST, GMT Differential, Point Name Setting Screen. To return to the normal Timekeeping Mode screen, press

DST, GMT Differential, Point Name Setting Screen

DST ON/OFF

Point name

GMT differential

DST

ON/OFF

To set the time and date

• Use this screen to set the current time and date, to reset the seconds to 00, and to toggle between 12-hour and 24-hour timekeeping.

1.In the Timekeeping Mode, check if the DST indicator is

displayed, and change the DST setting in accordance with the timekeeping in your area.

• Turn on DST if daylight saving time (summer time) is currently in effect in your area. If daylight saving time is not currently in effect in your area, be sure to turn DST off.

• See “To turn DST on and off” for details about turning DST on and off.

2.In the Timekeeping Mode, hold down

seconds digits start to flash. This is the Time and Date Setting Screen.

Seconds

Minutes

E to reset the seconds to

E while the seconds count is in the range of 30 to 59, the seconds

to decrease it. Holding down either button changes the

A three times.

Use this screen to switch DST (daylight saving time or summer time) on and off, to specify the GMT differential from your current location and to input new point names.

Point name

GMT

differential

1st character

E to switch between the two

2nd character

A until the

12/24-Hour Format

A to advance to the

8th character

E to in-

D to illuminate the display for about two seconds. In the Countdown Mode or Stopwatch Mode,

Countdown Alarm Mode

To change a point name

1.Press

to scroll forward through the characters at the current flashing location, or

B to scroll backwards. Holding down either button changes the current characters

at high speed.

2. When the character you want is displayed, press character.

3.Repeat steps 1 and 2 for all eight characters of the point name.

• After you are finished making the settings you want, press

Longitude/Latitude, Lunar Tide Interval Setting Screen.

Longitude/Latitude, Lunar Tide Interval Setting Screen

Longitude

Lunar tide interval

To set the longitude and latitude of your current location

While the Longitude/Latitude is flashing on the display, use tude value and (from increase to decrease, or from decrease to increase), press

• After you are finished making the settings you want, press

Lunar Tide Interval Setting Screen.

To set the lunar tide interval at your current location

1.Press

E to increase the hour value or

changes the setting at high speed.

2.Press

C to move to the minutes digits.

CC EE

3.Press

E to increase the minutes value or

4. After you are finished making the settings you want, press normal Timekeeping Mode Screen.

About the lunar tide interval

The lunar tide interval is the period from the moon’s upper transit (moon up) to high tide. If you know the lunar tide interval, tide changes can be determined using the moon age. This watch calculates tide changes according to the current time and the location setting, and displays them graphically.

To calculate the lunar tide interval

1.Look up the high tide time for the flood tide of the location whose tide changes you want to know.

2. Use this watch to look up the moon up time that occurs immediately before this time.

Subtracting the moon up time from the high tide time produces the lunar tide interval.

To view point data

1. In the Timekeeping Mode, press that appears is the one you selected as your home time point.

2.Press

to scroll through the data for the 10 points. The watch beeps and returns

to the Timekeeping Mode after the tenth point.

• Pressing

C at any time in the Multi-time Mode immediately returns to the Time-

keeping Mode.

• You can use the procedure under “DST, GMT Differential, Point Name Setting

Screen” and “Longitude/Latitude, Lunar Tide Interval Setting Screen” to change

the name and other data of a point.

GENERAL GUIDE

• Press

C to change from mode to mode. After you perform an operation in Countdown Alarm Mode or Stopwatch Mode, pressing

C returns to the Timekeeping Mode.

Stopwatch Mode

Latitude

B to change the latitude value. To reverse the direction of the change

Use this screen to specify the longitude, latitude, and lunar tide interval of your current location.

Longitude/Latitude

B to decrease it. Holding down either button

B to decrease it.

Alarm Mode

C to advance to the next

A to advance to the

Luner tide interval

MinutesHour

E to change the longi-

C to advance to the

A to return to the

MULTI-TIME MODE

B to enter the Multi-time Mode. The first point

Multi-time Mode

Point name

To turn DST on and off

While ON or OFF and the small DST mark is flashing on the display, press toggle DST on and off.

Important!

• Be sure to use this procedure to turn daylight saving time (summer time) on and off. Never manually change the timekeeping setting to adjust for daylight saving time. Doing so will produce incorrect Moon Data, Tide Graph, and Sunrise/Sunset data.

Use

C to move the flashing to the GMT differential value.

To set the GMT differential Note

• The GMT differential is the difference in time between the time zone where you are currently located and Greenwich Mean Time (GMT).

• See “TIME ZONE CHART” for information about determining the GMT differential in your area.

1.Press

E to increase the value or

changes the setting at high speed.

2.Use

to move the flashing to the first character of the point name.

B to decrease it. Holding down either button

E to

Home time

This watch comes pre-programmed with data for 10 diving points around the world. The data for each point includes an 8-character point name, GMT differential, longitude and latitude, and lunar tide interval. Setting the current time and date for any of the points causes the time and date settings for all other points to be adjusted accordingly. In the case of DST, however, you must make a separate setting for each point. You can use the following procedure to select any one of the ten points as your home time point.

• See the “PRESET LOCATION CHART” for details on the locations whose data is preset in watch memory when you purchase it.

To select a point for your home time

• While the point you want to use for your home time is displayed in the Multi-time Mode, hold down

E for about two seconds.

Local time

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ABOUT THE BACKLIGHT

About the Auto Light Switch Function

When the auto light switch function is turned on, the backlight automatically turns on for two seconds under the conditions described below. Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light switch to operate when not needed, which shortens battery life.

Moving the watch to a position that is parallel to the ground and then tilting it towards you approximately 40 degrees causes the backlight to illuminate.

Parallel to ground

• The backlight may not illuminate if the face of the watch is more than 15 degrees off parallel to the left or right. Make sure that the back of your hand is parallel to the ground.

Parallel to ground

• Static electricity or magnetic force can interfere with proper operation of the auto light switch function. If the auto backlight does not illuminate, try moving the watch back to the starting position (parallel with the ground) and then tilt it back toward you again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.

• Under certain conditions the backlight may not light until about one second or less after turn the face of the watch towards you. This does not necessarily indicate malfunction of the backlight.

To switch the auto light switch function on and off

In the Timekeeping Mode, hold down switch function on and off.

More than 15 degrees too high More than 15 degrees too low

E for one or two seconds to turn the auto light

Auto light switch indicator

Hold down

ON OFF

• The auto light switch indicator is shown on the display in all modes while the auto light switch function is on.

• In order to protect against running down the battery, the auto light switch function is automatically turned off approximately six hours after you turn it on. Repeat the above procedure to turn the auto light switch function back on if you want.

• Pressing

D (Timekeeping Mode, Moon Data Mode, Tide Graph Mode, Sunrise/

Sunset Mode, Alarm Mode) or illuminates the display, regardless of the auto light switch’s on/off setting.

Caution

• The backlight of this watch employs an electro-luminescent (EL) light, which loses its illuminating power after very long term use.

• Frequent use of the backligfht shortens the battery life.

• The watch emits an audible sound whenever the display is illuminated. This is

because the EL light vibrates slightly when lit. It does not indicate malfunction of the watch.

Warning!

• Never try to read your watch when mountain climbing or hiking in areas that are dark or in areas with poor footing. Doing so is dangerous and can result in serious personal injury.

• Never try to read your watch when running where there is the danger of accidents, especially in locations where there might be vehicular or pedestrian traffic. Doing so is dangerous and can result in serious personal injury.

• Never try to read your watch when riding on a bicycle or when operating a motorcycle or any other motor vehicle. Doing so is dangerous and can result in a traffic accident and serious personal injury.

• When you are wearing the watch, make sure that its auto backlight function is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto backlight can create a distraction, which can result in a traffic accident and serious personal injury.

E (Countdown Alarm Mode, Stopwatch Mode)

MOON DATA MODE

Be sure to set the current time and your current location before trying to use the Moon Data Mode. The Moon Data Mode display shows the current moon age, as well as moon up and moon down times. Moon age is indicated both by a value and one of the following graphics.

New Moon Crescent

Moon

Location

Earth

Moon

Half Moon

First Quarter

Moon-Up

Full Moon Half Moon

• The moon up time indicates when the moon will reach its highest point relative to your current location (upper transit), while the moon down time indicates when it will reach its lowest point (lower transit). Note that moon up and moon down times are accurate up to ±30 minutes.

Last Quarter

To display the moon up and moon down time for a specific date

Point name

Hour

Moon down

Moon age

Time

High Ebb Flood High

time

Moon up time

Year

Month

Low

• The moon data for your home time point appears first when you enter the Moon Data Mode.

Minutes

Day

Tide graph

Month Day

• Press

E (forward) or

seconds after entering the Moon Data Mode to scroll to another point. Holding down either button scrolls at high speed. It takes about 15 seconds before moon data appears after you display the name of a point.

• If you do not perform any button operation, about two seconds after you enter the Moon Data Mode the display changes automatically to show the moon data for today’s date. Pressing

while

B goes back to the previous date. Holding down

either button scrolls the date at high speed. It takes about 15 seconds before moon data appears after you display a date.

• Note that once the moon data display appears, you cannot change to another point. To change to another point, press and make the changes you want.

• Moon data is displayed in 5-minute units.

• For days around the full moon (moon age 15) or new

moon (moon age 29.5), there are days where there is no moon up or moon down. In such cases, the xx:xx is shown for the moon up or moon down time.

B (back) within about two

E advances to the next date,

twice to return to the point name display

TIDE GRAPH MODE

1.Press

A while in the Moon Data Mode to enter the Tide

Graph Mode. The display shows the tide graph for 6:00 am on the date that was selected in the Moon Data Mode.

2.Use

E (forward) and

hour increments. Holding down either button changes the time at high speed.

• Note that once you enter the Tide Graph Mode, you cannot change to another point or date. To change to another point or date, press Data Mode, make the changes you want, and then reenter the Tide Graph Mode.

B (back) to scroll the time in 1-

A to return to the Moon

SUNRISE/SUNSET MODE

Point name

Hour

Sunset time

• Note that once the sunrise/sunset data display appears, you cannot change to another point. To change to another point, press name display and make the changes you want.

• Sunrise/sunset data is displayed in 5-minute units.

Sunrise time

• The today’s sunrise and sunset data for your home time point appears first when you enter the Sunrise/Sunset Mode.

• Press

E (forward) or

seconds after entering the Sunrise/Sunset Mode to scroll to another point. Holding down either button scrolls at

Minutes

high speed. It takes about 15 seconds before sunrise/ sunset data appears after you display the name of a point.

• If you do not perform any button operation, about two seconds after you enter the Sunrise/Sunset Mode the display changes automatically to show the sunrise/ sunset data for today’s date. Pressing the next date, while Holding down either button scrolls the date at high speed. It takes about 15 seconds before sunrise/sunset data appears after you display a date.

B (back) within about two

B goes back to the previous date.

twice to return to the point

E advances to

COUNTDOWN ALARM MODE

The countdown alarm can be set within a range of 1 second to 24 hours. When the countdown reaches zero, an alarm sounds for 10 seconds or until you press any button.

To set the countdown start time and to switch auto repeat timing on and off

Mode indicator

Hour

1.Hold down

2.Press

Minutes

Seconds

1/10 Second

A while in the Countdown Alarm Mode. The

minutes digits flash on the display because they are

selected

C to change the selection in the following

sequence.

Minutes

Seconds Hour

Auto repeat on/off

Moon

Moon-Down

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