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Stopwatch, Countdown timer, Illumination – G-Shock GW-M850-7 User Manual

Page 5: Power supply, Operation guide 3155

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Operation Guide 3155

5

Alarm Operation

The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, until you turn the alarm off.

• Alarm and Hourly Time Signal operations are performed in accordance with the

Timekeeping Mode time.

• To stop the alarm tone after it starts to sound, press any button.

• Performing any one of the following operations during a 5-minute interval between

snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen
Displaying the

SNZ

setting screen

To test the alarm

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

To turn an alarm on and off

1. In the Alarm Mode, use D to select an alarm.
2. Press B to toggle it on and off.

• Turning on a alarm (

AL1

,

AL2

,

AL3

,

AL4

or

SNZ

) displays the alarm on indicator (

) on its

Alarm Mode screen.

• In all modes, the alarm on indicator is shown for any

alarm that is currently turned on.

• The alarm on indicator flashes while the alarm is

sounding.

• The snooze alarm indicator (

) flashes while the

snooze alarm is sounding and during the 5-minute
intervals between alarms.

Alarm on
indicator

Snooze alarm
indicator

ON

To turn the Hourly Time Signal on and off

1. In the Alarm Mode, use D to select the Hourly Time

Signal (

SIG

).

2. Press B to toggle it on and off.

• The Hourly Time Signal on indicator (

) is shown

on the display in all modes while this function is turned
on.

Hourly time signal
on indicator

Stopwatch

The stopwatch lets you measure elapsed time, split times,
and two finishes.

• The display range of the stopwatch is 23 hours, 59

minutes, 59.99 seconds.

• The stopwatch continues to run, restarting from zero

after it reaches its limit, until you stop it.

• The stopwatch measurement operation continues even

if you exit the Stopwatch Mode.

• Exiting the 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, which you enter by pressing C.

1/100 second

Hours

Minutes

Seconds

To measure times with the stopwatch

Elapsed Time

Split Time

Two Finishes

D
Start

Stop

Re-start

Stop

D

D

D

Clear

B

D
Start

Split
(SPL displayed)

Split release

Stop

B

D

B

Clear

B

D
Start

Split
First runner finishes.
Display time of first
runner.

Stop
Second runner
finishes.

Split release
Display time of
second runner.

D

B

B

Clear

B

Countdown Timer

You can set the countdown timer within a range of one
minute to 24 hours. An alarm sounds when the countdown
reaches zero.

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

Countdown Timer Mode, which you enter by pressing
C.

Configuring the Countdown Timer

The following are the settings you should configure before
actually using the countdown timer.

Countdown start time

• See “To configure the countdown timer” for information

about setting up the timer.

Hours

Minutes

Seconds

Countdown End Beeper

The countdown end beeper lets you know when the countdown reaches zero. The
beeper stops after about 10 seconds or when you press any button.

To configure the countdown timer

1. While the countdown start time is on the display in the

Countdown Timer Mode, hold down A until the current
countdown start time starts to flash, which indicates the
setting screen.

• If the countdown start time is not displayed, use the

procedure under “To use the countdown timer” to
display it.

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

below to select other settings.

Hours

Minutes

ll

lll

l

ll

lll

ll

l

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

described below.

• To specify a countdown start time of 24 hours, set

.

4. Press A to exit the setting screen.

Button Operation

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

Setting

Hours, Minutes

Screen

To use the countdown timer

Press D while in the Countdown Timer Mode to start the
countdown timer.

• The countdown timer operation continues even if you

exit the Countdown Timer Mode.

• Press D while a countdown operation is in progress to

pause it. Press D again to resume the countdown.

• To stop a countdown operation completely, first pause it

(by pressing D), and then press B. This returns the
countdown time to its starting value.

llllll

llll

l

Seconds

Current timer time

Timer start time

Illumination

This watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch turns on illumination
automatically 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 “Illumination Precautions” for other important

information about using illumination.

To illuminate the display manually

In any mode, press L to turn on illumination.

• The above operation turns on illumination regardless of

the current auto light switch setting.

Auto light switch
on indicator

• You can use the procedure below to select either 1.5 seconds or 3 seconds as the

illumination duration. When you press L, 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

display contents start to flash. This is the setting screen.

2. Press the C button three times to move the flashing to

the seconds.

3. While the seconds are flashing, press B to toggle the

setting between 1.5 seconds (

) and 3 seconds (

).

4. Press A to exit the setting screen.

ll

ll

lll

ll

ll

ll

l l

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. Note that this watch features a “Full Auto
EL Light,” so the auto light switch operates only when available light is below a certain
level. It does not turn on the backlight under bright light.

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°

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 L for about three seconds to toggle the auto
light switch on (A.EL displayed) and off (A.EL not displayed).

• The auto light switch on indicator (A.EL) is on the display in all modes while the auto

light switch is turned on.

Power Supply

This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.

Example: Orient the watch so its face is

pointing at a light source.

• The illustration shows how to position

a watch with a resin band.

• Note that charging efficiency drops

when any part of the solar cell is
blocked by clothing, etc.

• You should try to keep the watch

outside of your sleeve as much as
possible. Charging is reduced
significantly if the face is covered only
partially.

Solar cell

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