G-shock DWG-100UJ-9JR User Manual download pdf (Page 4)

2059-4

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.

Turning on the Backlight Manually

In the Timekeeping or Pulse Measurement Modes, press L to illuminate

the display for about two seconds.

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

auto light switch setting.

Auto light switch

on indicator

Warning!

• Never try to read your watch when mountain climbing or hiking in

areas that are dark or in areas with poor footing. Doing so is

dangerous and can result in serious personal injury.

• Never try to read your watch when running where there is danger

of accidents, especially in locations where there might be

vehicular or pedestrian traffic. Doing so is dangerous and can

result in serious personal injury.

• Never try to read your watch when riding on a bicycle or when

operating a motorcycle or any other motor vehicle. Doing so is

dangerous and can result in a traffic accident and serious

personal injury.

• 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.

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 (except for the Pulse Measurement Mode). Note that the auto

light switch of this watch will operate only when available light is below a

certain level. It does not turn on the backlight under bright light. You can

select one of three trigger levels at which the backlight will turn on.

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 light.

than

Parallel

to ground

To select the auto light switch trigger level

1. In any mode, hold down C until the trigger

level flashes on the display.

2. Press B or L to cycle through the three

trigger level settings.

• L-1: High sensitivity (Turns on auto light

switch as soon as lighting becomes dim.)

L-2: Normal sensitivity

L-3: Low sensitivity (Does not turn on

auto light switch until it becomes relatively

dark.)

3. Press A, C, or P to return to the

Timekeeping Mode.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down B for two seconds to turn the auto

light switch on (

AUTO

displayed) and off (

AUTO

not displayed).

• The auto light switch on indicator (

AUTO

) is on the display in all

modes (except for the Pulse Measurement Mode) while the auto light

switch is turned on.

• Press B to toggle between the date screen and temperature screen.

Trigger level

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 Return Feature

• After you perform an operation in the Recall and Countdown Alarm

Modes, pressing C returns to the Timekeeping Mode.

• If you leave a screen with flashing digits on the display for two or three

minutes without performing any operation, the watch automatically saves

anything you have input up to that point and exits the setting screen.

Data and Setting Scrolling

The B and L buttons are used in various setting screens to scroll through

the available settings on the display. In most cases, holding down these

buttons during a scroll operation scrolls through the settings at high speed.

Timekeeping

• The day of the week is automatically displayed in accordance with the

date (year, month, and day) settings.

• The year can be set in the range of 1995 to 2039.

• The watch’s built-in full automatic calendar automatically makes

allowances for different month lengths and leap years. Once you set

the date, there should be no reason to change it except after the

replacement of the watch’s battery.

12-hour/24-hour Timekeeping Formats

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

Mode is also applied in the Alarm Mode.

• 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 pm. The A (AM)

indicator is shown from midnight to 11:59 am.

• With the 24-hour format, times are indicated in the range of 00:00 to

23:59, with 24 indicator.

Tips on Placing Your Finger on the Photosensor

The following are useful tips you can use to ensure successful pulse

measurements.

Tips On Placing Your Finger On The Photosensor

Note the following points if you experience problems with

measurements.

Correct

Place your finger so that the Photosensor is

covered by the pads of the finger, not the

fingertip. If your fingernail turns white, it

means you are pressing too hard. Try

pressing down a bit with your finger first, and

then make adjustments as you view the

display of the watch to see if measurements

are being taken.

Note

If you have trouble keeping your finger still

after physical exercise, try grasping your other

hand as shown in the illustration.

Incorrect

• Finger too upright.

• Finger not covering photosensor completely.

• Finger too far forward on the Photosensor.

Tips on Taking Measurements

Use the following techniques to ensure correct pulse measurements

every time.

• Do not change the pressure of your finger on the Photosensor.

• Do not move your finger on the Photosensor.

• Warm up your finger before taking measurements.

• Avoid bright light when taking measurements.

• During measurements, keep still and do not talk.

• Once you start the measurement procedure, place your finger on the

Photosensor as soon as possible.

• Remove rings or any other items that might restrict normal blood flow.

Important!

The following factors may make it difficult or even impossible to achieve

good pulse readings with this watch.

• Severe arrhythmia

Pulse waves are unstable, so they cannot be detected properly by the

Photosensor.

• Arteriosclerosis or other circulatory problems

Circulation at the fingertips is bad, so the Photosensor cannot detect

pulse waves.

• Thick fingertip skin

Thick skin impedes the passage of light through the fingertip. This

makes it hard for the Photosensor to take readings.

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G-shock DWG-100UJ-9JR User Manual Page 4

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