Alarms, Backlight, Reference – G-Shock GL-150-2 User Manual

Page 5: Operation guide 2463

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Operation Guide 2463

5

Alarms

You can set up to three independent multi-
function alarms with hour, minutes, month, and
day. When an alarm is turned on, the alarm tone
sounds when the alarm time is reached. You can
select either a one-time alarm or snooze alarm.
You can also turn on an Hourly Time Signal that
causes the watch to beep twice every hour on the
hour.

• The alarm number of the display indicates the

alarm type, as described below.

AL1

and

AL2

: One-time alarm screen

SNZ

: Snooze alarm screen

SIG

: Hourly Time Signal screen

• Alarm settings (and Hourly Time Signal

settings) are available in the Alarm Mode,
which you enter by pressing C.

Alarm date
(Month – Day)

Alarm number

Alarm time
(Hour : Minutes)

Alarm Types

The alarm type is determined by the settings you make, as described below.

Daily alarm
Set the hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at the time you set.

Date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting
causes the alarm to sound at the specific time, on the specific date you set.

1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting
causes the alarm to sound everyday at the time you set, only during the
month you set.

Monthly alarm
Set the day, hour and minutes for the alarm time. This type of setting causes
the alarm to sound every month at the time you set, on the day you set.

To set an alarm time

1. In the Alarm Mode, press D to scroll through

the alarm screens until the one whose time
you want to set is displayed.

2. After you select an alarm, hold down A until

the hour setting of the alarm time starts to
flash, which indicates the setting screen.

• This operation automatically turns on the

alarm.

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

other settings.

4. While a setting is flashing, use D (+) and B (–) to change it.

AL1

AL2

SNZ

SIG

Hour

Day

Minutes

Month

Alarm on indicator

• To set an alarm that does not include a month (Daily alarm, Monthly

alarm), set

xx

for the month. Use D and B until the

xx

mark appears

(between 12 and 1) while month setting is flashing.

• To set an alarm that does not include a day (Daily alarm, 1-Month

alarm), set

xx

for the day. Use D and B until the

xx

mark appears

(between 31 and 1) while the day setting is flashing.

• When setting the alarm time using the 12-hour format, take care to set

the time correctly as a.m. (no indicator) or p.m. (P indicator).

5. Press A to exit the setting screen.

Alarm Operation

The backgrounds of the upper and lower part of the display flash starting from
the point the Timekeeping Mode time reaches one hour before an alarm time.
This pre-alarm feature lets you know that an alarm time is about to be
reached. When the actual alarm time is reached, an alarm tone sounds for 20
seconds. In the case of the snooze alarm, the alarm repeats up to seven
times every five minutes until the alarm is turned off.

• Pressing any button stops the pre-alarm operation or the alarm tone operation.

• The pre-alarm feature works in the Timekeeping Mode only.

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

To turn the one-time alarm and the Hourly Time Signal on and off

1. In the Alarm Mode, press D to select a one-time alarm (

AL1

or

AL2

)

or the Hourly Time Signal (

SIG

).

2. When the alarm or the Hourly Time Signal you want to is selected, press

B to turn it on and off.

Indicates alarm is on.
Indicates Hourly Time Signal is on.

• The alarm on indicator (

) and the Hourly Time Signal on indicator (

)

are shown on the display in all modes while these functions are turned
on.

• If any alarm is on, the alarm on indicator is shown on the display when

you change to another mode.

To turn the snooze alarm on and off

1. In the Alarm Mode, press D to select the snooze alarm (

SNZ

).

2. Press B to turn it on (

displayed) and off (

not displayed).

• The snooze alarm on indicator (

) is shown on the display in all

modes while this function is turned on.

Backlight

The backlight uses an EL (electro-luminescent)
panel that causes the entire display to glow for
easy reading in the dark. The watch’s auto light
switch automatically turns on the backlight when
you angle the watch towards your face.

• The auto light switch must be turned on

(indicated by the auto light switch on indicator)
for it to operate.

• See “Backlight Precautions” for other important

information about using the backlight.

Auto light switch on indicator

To turn on the backlight manually

In the Countdown Timer and Stopwatch Modes, pressing D turns on the
backlight for about two seconds. In any other mode (Timekeeping, Site Time,
Moon/Tide Data, Sunrise/Sunset, and Alarm Modes), pressing L turns on
the backlight for about two seconds.

• The above operation turns on the backlight regardless of the current auto

light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about two
seconds, whenever you position your wrist as described below in any mode.

• Be sure to wear the watch on the outside of your left wrist while using the

auto light switch.

Moving the watch to a position that is parallel to the ground and then tilting
it towards you more than 40 degrees causes the backlight to turn on.

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 surprise or distract others around you.

Parallel to
ground

More than
40

°

••••• When you are wearing the watch, make sure that its auto light switch

is turned off before riding on 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 L for about one second to toggle the
auto light switch on (

displayed) and off (

not displayed).

• The auto light switch on indicator (

) is on the display in all modes while

the auto light switch is turned on.

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.

Auto Display

Auto Display continually changes the contents of
the digital display.

To turn off Auto Display

Press any button (except for L) to turn off Auto
Display. This returns to the Timekeeping Mode.

To turn on Auto Display

Hold down C for about three seconds until the
watch beeps.

• Note that Auto Display cannot be performed

while a setting screen is on the display.

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