G-Shock GLX-150 - Manual (Page 5)

Operation Guide 3295
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• You can use the procedure below to select either 1.5 seconds or 3 seconds as the
illumination duration. When you press B, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current illumination duration setting.
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. While the seconds are flashing, press B to toggle the
setting between 1.5 seconds ( ) and 3 seconds ( ).
3. Press A twice to exit the setting screen.
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About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on, whenever you position
your wrist as described below in any mode.
Moving the watch to a position that is parallel to the ground and then tilting it towards
you more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
Parallel to
ground More than
40°
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Warning!
••••• Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
startle or distract others around you.
••••• When you are wearing the watch, make sure that its auto light switch is turned
off before riding a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down B for about three seconds to toggle the auto
light switch on (auto light switch indicator displayed) and off (auto light switch indicator
not displayed).
• The auto light switch indicator remains in all modes while the auto light switch is
turned on.
• In order to protect against running down the battery, the auto light switch will turn off
automatically approximately six hours after you turn it on. Repeat the above
procedure to turn the auto light switch back on if you want.
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Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Moon Phase Indicator
The Moon phase indicator of this watch indicates the current phase of the Moon as
shown below.
Moon phase indicator
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• The Moon phase indicator shows the Moon as viewed at noon from a position in the
Northern Hemisphere looking south. Note that at times the image shown by the
Moon phase indicator may differ from that of the actual Moon in your area.
• The left-right orientation of the Moon phase is reversed when viewing from the
Southern Hemisphere or from a point near the equator.
Moon Phase
Indicator
Moon Age
Moon Phase
0.0 - 1.8
27.7 - 29.5
New
Moon
5.6 - 9.2
First
Quarter
(Waxing)
13.0 - 16.6
Full
Moon
20.3 - 23.9
Last
Quarter
(Waning)
Moon phase (part you can see)
1.9 - 5.5 9.3 - 12.9 16.7 - 20.2 24.0 - 27.6
(part you cannot see)
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Moon Phases and Moon Age
The Moon goes through a regular 29.53-day cycle. During each cycle, the Moon
appears to wax and wane as the relative positioning of the Earth, Moon, and Sun
changes. The greater the angular distance between the Moon and the Sun,* the more
we see illuminated.
* The angle to the Moon in relation to the direction at which the Sun is visible from the
Earth.
This watch performs a rough calculation of the current Moon age starting from day 0
of the moon age cycle. Since this watch performs calculations using integer values
only (no fractions), the margin for error of the displayed Moon age is ± 1 day.
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Tide Graph
The Tide Graph has six graphic segments, each of which indicates a different tide
level. The current tide level is indicated by the displayed graphic segment.
High Tide Low Tide
(Falling
Tide) (Rising
Tide) (Rising
Tide)
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Tidal Movements
Tides are the periodic rise and fall of the water of oceans, seas, bays, and other
bodies of water caused mainly by the gravitational interactions between the Earth,
Moon and Sun. Tides rise and fall about every six hours. The tide graph of this watch
indicates tidal movement based on the Moon’s transit over a meridian and the lunitidal
interval. The lunitidal interval differs according to your current location, so you must
specify a lunitidal interval in order to obtain the correct tide graph readings.
The tide graph displayed by this watch is based on the current Moon age.
Remember that the margin for error of the Moon age displayed by this watch is ± 1
day. The greater the error in a particular Moon age, the greater the error in the
resulting tide graph.
Lunitidal Interval
Theoretically, high tide is at the Moon’s transit over the meridian and low tide is about
six hours later. Actual high tide occurs somewhat later, due to factors such as
viscosity, friction, and underwater topography. Both the time differential between the
Moon’s transit over the meridian until high tide and the time differential between the
Moon’s transit over the meridian until low tide are known as the “lunitidal interval”.
When setting the lunitidal interval for this watch, use the time differential between the
Moon’s transit over the meridian until high tide.
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Flash Alert
When Flash Alert is turned on, the illumination flashes for the alarms, the Hourly Time
Signal, the countdown alarm, and stopwatch auto start.
To turn Flash Alert on and off
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. Press C eight times to display the Flash Alert setting
screen.
3. Press D to toggle Flash Alert on ( displayed) and
off ( displayed).
4. Press A twice to exit the setting screen.
• The Flash Alert setting you select with the above
procedure is applied in all modes.
• When Flash Alert is on, appears on the
timekeeping screen for about one second whenever you
enter the Stopwatch, Countdown Timer, or Alarm Mode.
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Button Operation Tone
The button operation tone sounds any time you press one of the watch’s buttons. You
can turn the button operation tone on or off as desired.
• Even if you turn off the button operation tone, the alarms, the Hourly Time Signal,
the countdown alarm, and stopwatch auto start all operate normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down
C to toggle the button operation tone
on (MUTE not displayed) and off (MUTE displayed).
• Holding down C to turn the button operation tone on or
off also causes the watch’s current mode to change.
• The MUTE indicator is displayed in all modes when the
button operation tone is turned off.
MUTE indicator