Casio G-7900A-4 manual

Casio G-7900A-4
  • Number of pages: 5
  • Filetype: PDF
  • 1

    Operation Guide 3194


    Getting Acquainted

    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
    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 (ST1)
    Tide/Moon Data
    Mode (ST2)
    Press .
    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.
    Press D.
    Use D (+) and B (–).
    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.


    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.
    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
    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
    Seconds UTC offset
    Year MinutesDay
    Home time zone
    Day of week
    Month – Day
    Hour : Minutes
    PM indicator
    Tide graph
    Moon phase indicator
    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
    2. Press C to display the DST setting screen.
    3. Press D to toggle between Daylight Saving Time
    displayed) and Standard Time (
    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 D to toggle between 12-hour timekeeping and 24-
    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
Casio G-7900A-4

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Casio G-7900A-4 specifications

Brand Casio
Model G-7900A-4
Product Watch
Language English
Filetype PDF
Technical details
Mechanism type Electronic
Watch type Wrist watch
Chronograph -
Chronometer -
Watch dial type LCD dial
Water resistant pressure 20 ATM
Water resistant depth 200 m
World time function
Timer 24 h
Alarm function
LED backlight
Accuracy ±15 sec/month
Clock mode 12h/24h
Countdown timer
Calendar type Day
Housing colour Black,Red
Band main colour Red
Case shape Round
Watch dial main colour -
Product design -
Watch case material Resin
Band material Resin
Watch glass type Mineral
Battery type CR2025
Battery life 2 year(s)
Number of batteries supported 1
Weight & dimensions
Width 50 mm
Depth 17.7 mm
Height 52.4 mm
Weight 68.2 g

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