Casio G-7900A-4 Manual

Casio Ur G-7900A-4

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Operation Guide 3194

MA0905-EB

Getting Acquainted

Warning!

• The measurement functions built into this watch are not intended for use in

taking measurements that require professional or industrial precision. Values

produced by this watch should be considered as reasonably accurate

representations only.

• The longitude, lunitidal interval, Moon phase indicator and tide graph data that

appear on the display of this watch are not intended for navigation purposes.

Always use proper instruments and resources to obtain data for navigation

purposes.

• This watch is not an instrument for calculating low tide and high tide times. The

tide graph of this watch is intended to provide a reasonable approximation of

tidal movements only.

• CASIO COMPUTER CO., LTD. assumes no responsibility for any loss, or any

claims by third parties that may arise through the use of this watch.

Timekeeping Mode World Time ModeAlarm ModeCountdown Timer

Mode

Stopwatch

Mode (ST1)

Tide/Moon Data

Mode

Stopwatch

Mode (ST2)

Press .

Screen

To do this:

Reset the seconds to

Toggle between Daylight Saving

Time ( ) and Standard Time ( )

Specify the UTC offset

Change the hour or minutes

Change the year

Change the month or day

Do this:

Press .D

Use D (+) and B (–).

About This Manual

• Button operations are indicated using the letters shown

in the illustration.

• Each section of this manual provides you with the

information you need to perform operations in each

mode. Further details and technical information can be

found in the “Reference” section.

General Guide

• Press C to change from mode to mode.

• In any mode (except when a setting screen is on the display), press L to illuminate

the display.

Timekeeping

Use the Timekeeping Mode to set and view the current

time and date.

• The tide graph shows tidal movements for the current

date in accordance with the current time as kept in the

Timekeeping Mode.

• The Moon phase indicator shows the current Moon

phase in accordance with the current date as kept in the

Timekeeping Mode.

Important!

• Be sure to configure the current time and date, and your

Home Site data (data for the site where you use the

watch) correctly before using the functions of this watch.

See “Home Site Data” for more information.

Setting the Time and Date

This watch is preset with UTC offset values that represent each time zone around the

globe. Before setting the time, be sure to set the UTC offset for your Home Site first,

which is the location where you normally will be using the watch.

• Note that World Time Mode times are all displayed based on the time and date

settings you configure in the Timekeeping Mode.

To set the time and date

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting

screen.

• Be sure to configure the correct UTC offset for your

Home Site before configuring any other Timekeeping

Mode settings.

• See the “City Code Table” for information about the

UTC offset settings that are supported.

2. Press C to move the flashing in the sequence shown below to select other

settings.

Seconds UTC offset Hour

Year MinutesDay

DST

Month

Home time zone

Day of week

Month – Day

Hour : Minutes

PM indicator

Tide graph

Moon phase indicator

Seconds

3. When the setting you want to change is flashing, use D and B to change it as

described below.

• See “Daylight Saving Time (DST)” for details about DST setting

• The UTC offset setting range is –12.0 to +14.0, in 0.5-hour units.

• When DST is turned on, the UTC offset setting range is –11.0 to +15.0, in

0.5-hour units.

4. Press A twice to exit the setting screen.

• The day of the week is displayed automatically in accordance with the date (year,

month, and day) settings.

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from Standard

Time. Remember that not all countries or even local areas use Daylight Saving Time.

To toggle the Timekeeping Mode time between DST and Standard Time

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting

screen.

2. Press C to display the DST setting screen.

3. Press D to toggle between Daylight Saving Time

( displayed) and Standard Time ( displayed).

4. Press A twice to exit the setting screen.

• The DST indicator appears on the Timekeeping, and

Tide/Moon Data screens to indicate that Daylight Saving

Time is turned on. In the case of the Tide/Moon Data

Mode, the DST indicator appears on the Tide Data

screen only.

To toggle between 12-hour and 24-hour timekeeping

In the Timekeeping Mode, press to toggle between 12-hour timekeeping and 24-D

hour timekeeping.

• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for

times in the range of noon to 11:59 p.m. and no indicator appears to the left of the

hour digits for times in the range of midnight to 11:59 a.m.

• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without

any indicator.

• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all other modes.

• The P indicator is not displayed when the current time is displayed in other modes.

DST indicator

Operation Guide 3194

Countdown Timer

The countdown timer can be set within a range of one

minute to 24 hours. An alarm sounds when the countdown

reaches zero. The countdown timer also has an auto-

repeat feature and a progress beeper that signals the

progress of the countdown.

• All of the operations in this section are performed in the

Countdown Timer Mode, which you enter by pressing

Configuring the Countdown Timer

The following are the settings you should configure before

actually using the countdown timer.

Countdown start time; Auto-repeat on/off; Progress

beeper on/off

• See “To configure the countdown timer for information”

about setting up the timer.

Auto-repeat

When auto-repeat is turned on, the countdown restarts automatically from the

countdown start time when it reaches zero.

When auto-repeat is turned off, the countdown stops when it reaches zero and the

display shows the original countdown start time.

• Pressing D while an auto-repeat countdown is in progress pauses the current

countdown. You can resume the auto-repeat countdown by pressing D, or you can

press A to reset to the countdown time starting value.

Countdown Timer Beeper Operations

The watch beeps at various times during a countdown so you can keep informed

about the countdown status without looking at the display. The following describes the

types of beeper operations the watch performs during a countdown.

Countdown End Beeper

The countdown end beeper lets you know when the countdown reaches zero.

• When the progress beeper is turned off, the countdown end beeper sounds for

about 10 seconds, or until you press any button to stop it.

• When the progress beeper is turned on, the countdown end beeper sounds for

about one second.

Progress Beeper

When the progress beeper is turned on, the watch uses beeps to signal countdown

progress as described below.

• Starting from five minutes before the end of the countdown, the watch emits four

short beeps at the top of each countdown minute.

• 30 seconds before the end of the countdown, the watch emits four short beeps.

• The watch emits a short beep for each of the last 10 seconds of the countdown.

• If the countdown start time is six minutes or greater, the watch emits a short beep for

each second of the final 10 seconds before the five-minute point is reached. Four

short beeps are emitted to signal when the five-minute point is reached.

Stopwatches

Your watch has two stopwatch modes:Stopwatch Mode

(ST1) and Stopwatch Mode (ST2). Both stopwatch modes

let you measure elapsed time, split times, and two

finishes. The Stopwatch Mode (ST1) includes Auto-Start.

• A display range of the stopwatch is 999 hours,

59 minutes, 59.99 seconds.

• A stopwatch continues to run, restarting from zero after

it reaches its limit, until you stop it.

• A stopwatch measurement operation continues even if

you exit a Stopwatch Mode.

• Exiting a Stopwatch Mode while a split time is frozen on

the display clears the split time and returns to elapsed

time measurement.

• All of the operations in this section are performed in the

Stopwatch Mode (ST1) or Stopwatch Mode (ST2),

which you enter by pressing C.

To measure times with the stopwatch

(Stopwatch Mode (ST1) and Stopwatch Mode (ST2))

Elapsed Time

Start Stop Re-start Stop Clear

Start Split

( displayed)

Split release Stop Clear

Start Split Stop Split release Clear

Split Time

Two Finishes

First runner finishes.

Display time of first

runner.

Second runner

finishes.

Display time of

second runner.

About Auto-Start (Stopwatch Mode (ST1))

With Auto-Start, the watch performs a 5-second countdown, and stopwatch operation

starts automatically when the countdown reaches zero.

During the final three seconds of the countdown, a beeper sounds with each second.

To use Auto-Start (ST1)

1. While the stopwatch screen is showing all zeros in the

Stopwatch Mode, press B.

• This displays a 5-second countdown screen.

• To return to the all zeros screen, press B again.

2. Press D to start the countdown.

• When the countdown reaches zero, a tone sounds and

a stopwatch timing operation starts automatically.

• Pressing D while the Auto-Start countdown is in

progress starts the stopwatch immediately.

Lon

itude value

ScreenSetting

Longitude Value

Longitude

(East/West)

Lunitidal Interval

Hours, Minutes

Button Operations

Use D (+) and B (–) to change the setting.

• You can specify a value in the range of 0 to 180 , in° °

1-degree units.

Use D to switch between east longitude ( ) and west

longitude ( ).

Use D (+) and B (–) to change the setting.

Seconds

Minutes

1/100 second

Timekeeping Mode time

* During stopwatch elapsed

time measurement,

shows the number of

hours elapsed.

Seconds

Hours Minutes

Home Site Data

Moon phase, tide graph data, and Tide/Moon Data Mode data will not be displayed

properly unless Home Site data (UTC offset, longitude, and lunitidal interval) is

configured correctly.

• The UTC offset is a value that indicates the time difference between a reference

point in Greenwich, England and the time zone where a city is located.

• The letters “ ” “UTC is the abbreviation for Coordinated Universal Time , which is the”

world-wide scientific standard of timekeeping. It is based upon carefully maintained

atomic (cesium) clocks that keep time accurately to within microseconds. Leap

seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s

rotation.

• The lunitidal interval is the time elapsing between the Moon’s transit over a meridian

and the next high tide at that meridian. See Lunitidal Interval“ ” for more information.

• This watch displays lunitidal intervals in terms of hours and minutes.

• The “Site/Lunitidal Interval Data List” provides UTC offset and longitude information

around the world.

• The following is the initial factory default Home Site data (Tokyo, Japan) when you

first purchase the watch, and whenever you have the battery replaced. Change

these settings to match the area where you normally use the watch.

UTC offset (+9.0); Longitude (East 140 degrees); Lunitidal interval (5 hours,

20 minutes)

To configure Home Site data

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting

screen.

2. Press C twice to display the UTC offset setting screen,

and confirm that the setting is correct.

• If the UTC offset setting is not correct, use D (+) and

B (–) to change it.

3. Press A to display the longitude value setting screen.

4. Press C to move the flashing in the sequence shown below to select other settings.

Longitude Value

Lunitidal Interval Minutes Lunitidal Interval Hours

Longitude (East/West)

5. When the setting you want to change is flashing, use D and B to change it as

described below.

6. Press A to exit the setting screen.

Tide/Moon Data

Tide/Moon data lets you view the Moon age and Moon

phase for a particular date, and tidal movements for a

particular date and time at your Home Site.

• When you enter the Tide/Moon Data Mode, the data for

6:00 a.m. on the current date appears first.

• If you suspect that the Tide/Moon data is not correct for

some reason, check the Timekeeping Mode data

(current time, date, and Home Site settings), and make

changes as required.

• See “Moon Phase Indicator” for information about the

Moon phase indicator and Tide Graph“ ” for information

about the tide graph.

• All of the operations in this section are performed in the

Tide/Moon Data Mode, which you enter by pressing C .

Tide/Moon Data Screens

In the Tide/Moon Data Mode, press A to toggle between the tide data screen and the

Moon data screen.

Tide Data Screen Moon Data Screen

Press .

Tide graph

Moon age

Time

Moon phase indicator

Month – Da

Month – Day

• While the tide data screen is displayed, use D B (+) and (–) to change the

displayed time in one-hour increments.

• While the Moon data screen is displayed, use (+) and ( ) to change theD B –

displayed date in one-day increments. Pressing will display the year ofD and B

the displayed date for about one second.

• You also can specify a particular date (year, month, day) to view its tide data and

Moon data. See To specify a date for more information.“ ”

• When you enter the Tide/Moon Data Mode, the screen (tide data or Moon data) that

was displayed the last time you exited the mode appears first.

To specify a date

1. In the Tide/Moon Data Mode, hold down A until the

year setting starts to flash, which indicates the setting

screen.

2. Press C to move the flashing in the sequence shown

below to select the other settings.

Year Month Day

3. While a setting is flashing, use D (+) or B (–) to change

it.

• You can specify a date in the range of January 1,

2000 to December 31, 2099.

4. Press A to exit the setting screen.

5. Use A to display either the tide data screen or the Moon data screen.

Tide graph

Time

Moon phase indicator

Month Da–

Month Day –

Year

Produkt Specifikationer

Mærke:	Casio
Kategori:	Ur
Model:	G-7900A-4
Bredde:	50 mm
Dybde:	17.7 mm
Højde:	52.4 mm
Vægt:	68.2 g
Armbånd, materiale:	Resin
Vandfast:	Ja
Urkassens materiale:	Resin
Kalender:	Ja
Ur-indstilling:	12t/24t
Timer:	24 h
Urtype:	Armbåndsur
Batterilevetid:	2 År
LED-baggrundsbelysning:	Ja
Batteritype:	CR2025
Antal understøttede batterier:	1
Slagfast:	Ja
Urets glastype:	Mineral
Alarmfunktion:	Ja
Mekanismetype:	Elektronisk
Se opkaldstype:	LCD-skive
Vandbestandigt tryk:	20 ATM
Vandbestandig dybde:	200 m
Husets farve:	Black,Red
Båndets hovedfarve:	Rød
Etui form:	Rund
Nøjagtighed:	±15 sek/md
Kalendertype:	Dag
Nedtællingsur:	Ja
Verdenstid funktkon:	Ja