G-Shock DWG-100UJ-9JR User Manual

Module No. 2059

GETTING ACQUAINTED

Congratulations upon your selection of this CASIO watch. To get the
most out of your purchase, be sure to carefully read this manual and
keep it on hand for later reference when necessary.

• The pulse measurement function built into this watch is not
intended for taking measurements that require professional or
industrial precision. Values produced by this watch should be
considered as reasonable representations 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.

• Press C to change from mode to mode.

• Pressing the P button enters directly into the Pulse Measurement

Mode from any other mode.

Pulse

Measurement

Mode

Warning!

Press P.

▲

Press C.

Timekeeping Mode

▲

GENERAL GUIDE

Press C.

▲

About this manual

Stopwatch Mode

▲

2059-1

• 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.

Recall Mode



▲

▲

Countdown Alarm ModeAlarm Mode

▲

TIMEKEEPING

Use the Timekeeping Mode to set and view the current time and date.
You can also display the current temperature.

• In the Timekeeping Mode, press B to toggle between the date screen
and temperature screen.

PM indicator Hour : Minutes Seconds

• See the section of this manual titled “THERMOMETER” for information
about the temperature screen.

Setting the Time and Date

4. While hour, minutes, year, month, or day is flashing, press B to

increase the setting or L to decrease it.

• While the seconds setting is selected, press B to reset seconds to

• When the 12/24-hour setting is selected, press B to toggle

5. Press A to return to the current time screen.

[Date] [Temperature]

Day of week Month – Day

Press B.

▲

Temperature

▲

1. In the Timekeeping Mode, press B to
display the Date screen.

2. Hold down A until the seconds digits start
to flash.

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

Seconds

Day

OO.

between 12-hour (12H) and 24-hour (24H) timekeeping.

Hour

Minutes

Month

12/24-Hour
Format

Year

Resetting the Seconds Count to Zero

1. In the Timekeeping Mode, press B to display the Date screen.

2. Hold down A until the seconds digits start to flash.

3. Press B to set the seconds count to OO.

• Pressing B while the seconds count is in the range of 30 to 59
resets the seconds to OO and add 1 to the minutes. In the range of
00 to 29, the minutes count is unchanged.

4. Press A to return to the current time screen.

THERMOMETER

Temperature

About Temperature Measurements

• When you first display the Temperature screen, it shows the current
temperature at that time. If you leave the Temperature screen on the
display, temperature measurements are taken once every even
number minute (of the Timekeeping Mode time).

• Temperature measurements are affected by your body temperature
(while you are wearing the watch), direct sunlight, and moisture. To
achieve a more accurate temperature measurement, remove the
watch from your wrist, place it in a well ventilated location out of direct
sunlight, and wipe off all moisture from the case. It takes
approximately 20 to 30 minutes for the case of the watch to reach the
actual surrounding temperature.

A built-in temperature sensor measures
temperature and shows the measured value
on the display. You can calibrate the
temperature sensor if you suspect the
temperature reading is incorrect.

Understanding the Temperature
Screen

1. Use C to enter the Timekeeping Mode.

2. Press B to display the Temperature
screen.

• Temperature is displayed in units of

0.1°C in the range of –20.0°C to 60.0°C.

• Press B again to return to the date

screen.

2059-2

PULSE MEASUREMENT

The pulse measurement function uses a photosensor to detect the
movement of blood in your fingertip, which it then converts to a pulse
value. A biofeedback feature also lets you set a target pulse and monitor
your actual pulse in relation to your target.

Entering and Exiting the Pulse Measurement Mode

1. Pressing P in any mode enters the Pulse Measurement Mode,
indicated by

[Pulse Measurement] [Biofeedback]

• The flashing indicates that the watch is waiting for you to place your finger

on the photosensor (standby). To stop the flashing, press P again. Each
press of P turns standby on (xx flashing) and off (xx not flashing).

• Press B to toggle between the pulse measurement screen and the

biofeedback screen.

2. Press C to return to the Timekeeping Mode.

Measuring Your Pulse

Pulse graph

Pulse value

• Within about 7 to 15 seconds, a value showing the initial measurement

result appears on the display, along with a bar on the pulse graph and
a wave indicator that are synchronized with your pulse.

Note

• The pulse value on the display is updated every 2 to 3 seconds.

• Take care you do not change your finger pressure or move your finger

too much while it is on the photosensor.

• Either of the following indicates that the watch was unable to obtain a

good pulse reading.

xx: Unstable measured value
E: No pulse detected

• If you have problems getting a value to appear, press P to stop the

measurement procedure, and see “Tips on Placing Your Finger on the
Photosensor”.

Biofeedback

The biofeedback feature lets you compare your measured pulse with a
target pulse rate you preset. You can use this feedback to check the effect
of relaxation techniques designed to reduce your resting heart rate.
Joggers and endurance athletes can use this information to maintain their
optimum heart rate during training and to monitor post-workout recovery.

Caution!
Always stop running and stand in a safe place whenever
performing a pulse measurement. Measuring your pulse while
running creates the risk of personal injury to you and others.

To set your target pulse

• You can set the target pulse value within the range of 30 to 200.

3. Press A to return to the biofeedback screen.

To perform a biofeedback operation

xx flashing on the display.

Wave indicator

Target pulse

Pulse value

Target pulse

Press B.

▲

▲

Photosensor

1. Make sure the pulse measurement screen
is in standby (xx flashing).

• If xx is not flashing, press P.

2. Lightly place your finger onto the
photosensor to start pulse measurement.

• Measurement continues for two minutes

or until you remove your finger from the
photosensor.

1. In the Pulse Measurement Mode, hold
down A until the target pulse value flashes
on the display.

2. Press B to increase the target pulse value
or L to decrease it.

1. Make sure the biofeedback screen is in
standby (xx flashing).

• If xx is not flashing, press P.

2. Lightly place your finger onto the
photosensor to start pulse measurement.

• Measurement continues for two minutes

or until you remove your finger from the
photosensor.

• The target pulse value flashes whenever

the current pulse value reading is within

±5 beats of the target.

• See the “Note” of “Measuring Your Pulse”

for important pulse measurement
precautions.

Pulse Graph

The meaning of the data that appears in the pulse graph depends on
whether you are performing a pulse measurement screen operation or
biofeedback screen operation.

Pulse Measurement Screen

Previous 15 measurements

Pulse measurements

• The detection level indicates the relative quality of the pulse detection.
Level 0 (no dots) is the worst, while Level 5 is the best.

• A level of 4 or 5 indicates that the pulse reading is fairly reliable.

• On the pulse measurement screen, the graph shows readings that are

relative to the first reading. The first reading is automatically defined as
the central point. Because of this, the value range of each dot on the
graph is adjusted with each new measurement, based on the first
reading.

80 – 89

Graph scale (when
first measurement

70 – 79

is in the range of

60 – 69

60 to 69)

50 – 59
40 – 49

• The graph scale of the pulse measurement screen graph automatically
shifts up or down whenever a measured value is outside the current
graph scale.

Biofeedback Screen

Latest measurement

+16 or more
+6 to +15
–5 to +5
–6 to –15
–16 or lower

Latest measurement

100 – 110
90 – 99
80 – 89
70 – 79
60 – 69

Detection level (Level 4)

• This graph indicates the difference between
your preset target pulse rate and the
actually measured pulse rate.

• The detection level is the same as that
described for the pulse measurement
screen above.

• See “To set your target pulse” for
information about setting a target value.

Graph scale (when first
measurement is in the
range of 80 to 89)

120 – 129
110 – 119
100 – 109
90 – 99
80 – 89

Graph scale (when
first measurement
is in the range of
100 to 109)

STOPWATCH

The Stopwatch functions let you record elapsed time, lap times, and split
times. The range of the stopwatch is 99 hours, 59 minutes, 59 seconds.
You can also store lap and split times in memory.

• Stopwatch functions are available in the Stopwatch Mode, which you
can enter using C.

• For the first 10 hours, the screen shows hours, minutes, seconds, and
1/100 second. After 10 hours, the screen format changes to show
hours, minutes, and seconds.

[Hours, Minutes, Seconds, 1/100 second] [Hours, Minutes, Seconds]

Lap time

Split time

• The lap time appears in the upper part of the display. You can use this
function to time how long it takes to complete a specific portion (such
as a single lap) of a race.

• The split time appears in the lower part of the display. You can use this
function to time how long it takes to get from the start to a specific
point in a race.

Measuring Elapsed Time

1. Press B to start the stopwatch.

2. Press B to stop the stopwatch.

• You can resume the measurement operation by pressing B again.

3. Press L to clear the stopwatch to all zeros.

Recording Lap and Split Times

1. Press B to start the stopwatch.

2. Press L to display the timing up to that point. Stopwatch timing

continues internally.

• When you do, times are remaining on the display for about 10
seconds, and then the display changes back automatically to the
stopwatch display.

3. You can repeat step 2 as many times as you want.

4. Press B to stop the time measurement.

5. Press L to clear the stopwatch to all zeros.