Casio G-SHOCK GA-2100 User manual

Operation Guide 5611
E-9
To do this: Enter this mode: See:
Use the stopwatch to measure elapsed time Stopwatch Mode E-26
Use the countdown timer Countdown Timer Mode E-30
Set an alarm time Alarm Mode E-33
E-8
Mode Reference Guide
The mode you should select depends on what you want to do.
To do this: Enter this mode: See:
xView the current date in the Home City
xConfigure Home City and daylight saving time (DST)
settings
xConfigure time and date settings
xView the World Time city and time
xChange the display illumination duration setting
xEnable/disable the button operation tone
Timekeeping Mode E-15
View the current time in one of 48 cities (31 time
zones) around the globe World Time Mode E-23
E-7E-6
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-43
Main Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-45
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-46
Operating Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-49
User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-60
E-5
Using the Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
To enter the Alarm Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
To set an alarm time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-34
To test the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-35
To turn an alarm and the Hourly Time Signal on and off . . . . . . . . . . . . . . . . . E-36
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-36
Illumination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-37
To turn on illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-37
To change the illumination duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-38
Adjusting Hand Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-39
Button Operation Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-41
To turn the button operation tone on and off . . . . . . . . . . . . . . . . . . . . . . . . . E-42
E-4
Checking the Current Time in a Different Time Zone . . . . . . . . . . . . . . . . . . . E-23
To enter the World Time Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-24
To view the time in another time zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-24
To specify standard time or daylight saving time (DST) for a city. . . . . . . . . . . E-25
Using the Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-26
To enter the Stopwatch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-26
To perform an elapsed time operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-27
To pause at a split time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-27
To measure two finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-27
Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-30
To enter the Countdown Timer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-30
To configure the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-31
To perform a countdown timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-32
To stop the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-32
E-3
Contents
About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
Things to check before using the watch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Mode Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
Timekeeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
Configuring Home City Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-16
To configure Home City settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-16
To change the Daylight Saving Time (summer time) setting . . . . . . . . . . . . . . E-18
Adjusting the Digital Time and Date Settings . . . . . . . . . . . . . . . . . . . . . . . . . E-19
To configure the digital time and date settings . . . . . . . . . . . . . . . . . . . . . . . . E-19
E-2
Things to check before using the watch
1. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City settings” (page E-16) to configure
your Home City and daylight saving time settings.
Important!
xProper World Time Mode data depends on correct Home City, time, and date
settings in the Timekeeping Mode. Make sure you configure these settings
correctly.
2. Set the current time.
xSee “Adjusting the Digital Time and Date Settings” (page E-19).
The watch is now ready for use.
E-1
About This Manual
xDepending on the model of your watch, display text
appears either as dark figures on a light background, or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.
xButton operations are indicated using the letters shown
in the illustration.
xNote that the product illustrations in this manual are
intended for reference only, and so the actual product
may appear somewhat different than depicted by an
illustration.
E
ENGLISH
Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is
designed, carefully read and follow the instructions in this manual, especially the
information under “Operating Precautions” and “User Maintenance”.
MA1906-EB
©
2019 CASIO COMPUTER CO., LTD.

Operation Guide 5611
E-19
Adjusting the Digital Time and Date Settings
Use the procedure below to adjust the digital time and date settings.
To configure the digital time and date settings
1. In the Timekeeping Mode, hold down Auntil the
flashing SET indicator disappears from the display
and the currently selected city code appears on the
display.
E-18
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the
flashing SET indicator disappears from the display
and the currently selected city code appears on the
display.
2. Press Cto display the DST setting mode.
3. Press Dor Bto toggle between Daylight Saving
Time (ON) and Standard Time (OFF).
xNote that you cannot switch between daylight saving
time and standard time while UTC is selected as your
Home City.
4. After the setting is the way you want, press Ato
return to the Timekeeping Mode.
xThe DST indicator appears to indicate that Daylight
Saving Time is turned on.
DST indicator
E-17
Note
xAfter you specify a city code, the watch will use UTC* offsets in the World Time
Mode to calculate the current time for other time zones based on the current time
in your Home City.
* Coordinated Universal Time, the world-wide scientific standard of timekeeping.
The reference point for UTC is Greenwich, England.
E-16
Configuring Home City Settings
There are two Home City settings: actually selecting the Home City, and selecting
either standard time or daylight saving time (DST).
To configure Home City settings
1. In the Timekeeping Mode, hold down Auntil the
flashing SET indicator disappears from the display
and the currently selected city code appears on the
display.
xThis indicates the Home City setting mode.
2. Use D(+) and B(–) to scroll through city codes until
the one you want is displayed.
xFor details about city codes, see the “City Code
Table” at the back of this manual.
3. After the setting is the way you want, press Ato
return to the Timekeeping Mode.
City Code
E-15
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
Day of week
Second
Minute
Each time you press D, the display will change
as follows.
Hour
Month-Day Hour : Minute
PM indicator
D
xTo view the Home City name (English), press A.
E-14
2. Pressing Band Cat the same time again will cause the hands to return to their
normal positions (normal timekeeping).
Note
xWatch button functions are the same regardless of whether the hands are moved
out of the way or at their normal positions.
xChanging to another mode will cause the hands to move back to their normal
positions.
xThe hands also will move back to their normal positions automatically if no
operation is performed for about one hour.
E-13
1. Press Band Cat the same time.
xThis will cause the hour and minute hands to move to a location where they do
not block your view of the digital display.
Example: When the current time is 8:30
Flashes while the hands are moved out of the way.
E-12
General Functions (All Modes)
The functions and operations described in this section can be used in all modes.
Auto Return
If you do not perform any operation for about two or three minutes while configuring
settings (setting flashing on the digital display) in any mode, the watch will exit the
setting operation and return to normal display.
Scrolling
The Band Dare used on the setting mode to scroll through data on the display.
In most cases, holding down these buttons during a scroll operation scrolls through
the data at high speed.
Moving the Hands Out of the Way for Better Viewing
You can use the procedure below to temporarily move the hour and minute hands
out of the way to better view what is on the display.
xThis operation can be performed in any mode. In the case of a setting mode
(setting flashing on the screen), the hands will move out of the way automatically,
even if you do not perform the below operation.
E-11
Countdown Timer Mode
C
Alarm ModeStopwatch Mode
CC
xTo return to the Timekeeping Mode from any other mode, hold down Cfor at
least two seconds.
E-10
Selecting a Mode
xPress Cto cycle between the modes as shown below.
Timekeeping Mode World Time Mode
C C

Operation Guide 5611
E-29
Note
xAn ongoing elapsed time measurement operation will continue internally even if
you change to another mode. However, if you exit the Stopwatch Mode while a
split time is displayed, the split time will not be displayed when you return to the
Stopwatch Mode.
E-28
xElapsed time is shown in 1/100-second units for the first hour of the measurement.
After the first hour, elapsed time is shown in one-second units.
First hour After first hour
Seconds Minutes
Minutes Hours
1/100 Second Seconds
E-27
To perform an elapsed time operation
DD D D A
Start Stop (Resume) (Stop) Reset
To pause at a split time
DA A D A
Start Split
(SPL flashing)
Split release Stop Reset
To measure two finishes
D A D A A
Start Split
(SPL flashing)
First runner finishes.
Display time of first
runner.
Stop
(SPL displayed)
Second runner
finishes.
Split release
Display time of
second runner.
Reset
B
E-26
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two finishes.
xThe stopwatch measures elapsed time in units of 1/100 seconds for the first hour,
and in 1-second units after that for up to 24 hours total. After that, elapsed time
reverts to zero and then stops.
Minutes
Seconds
1/100 Second
To enter the Stopwatch Mode
Use Cto select the Stopwatch Mode as shown on page E-11.
E-25
To specify standard time or daylight saving time (DST) for a city
1. In the World Time Mode, use Dto display the city
code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.
2. Hold down Afor at least two seconds.
xThis toggles the city code you selected in step1
between Daylight Saving Time (DST indicator
displayed) and standard time (DST indicator not
displayed).
xNote that you cannot switch between standard time/
daylight saving time (DST) while UTC is selected as
the World Time City.
xThe standard time/daylight saving time (DST) setting
affects only the currently displayed city. Other cities
are not affected.
DST indicator
E-24
To enter the World Time Mode
Use Cto select the World Time Mode as shown on page E-10.
To view the time in another time zone
In the World Time Mode, use Dto change the city code.
E-23
Checking the Current Time in a Different Time Zone
You can use the World Time Mode to view the current
time in one of 31 time zones (48 cities) around the globe.
The city that is currently selected in the World Time
Mode is called the “World Time City”.
xThe hour and minute hands indicate information for the
currently selected Home City.
xWhen you enter the World Time Mode, the currently
selected city code and city name (English) scroll once
across the digital display. After that, the current time in
the World Time City is displayed.
xYou can view the city code by pressing A.
World Time City hour
and minute
Second
E-22
Note
xResetting the seconds to 00 while the current count is in the range of 30 to
59causes the minutes to be increased by 1.
xThe watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to
change it except after you have the watch’s battery replaced.
xWhile 12-hour format is selected for timekeeping, a Pindicator will appear for
times from noon to 11:59 p.m. No indicator appears for times from midnight to
11:59 a.m. With 24-hour format, time is displayed from 0:00 to 23:59, without any
Pindicator.
xThe day of the week changes automatically when the date changes.
E-21
3. When the timekeeping setting you want to change is flashing, perform the
operation described below.
Screen To do this: Do this:
Toggle between 12-hour (12H) and 24-hour
(24H) timekeeping Use Dand B.
Reset the seconds to 00 Press D.
Change the hour or minute
Use D(+) and B(–) to
change these settings.
Change the year
Change the month or day
4. Press Ato exit the setting mode.
E-20
2. Press Cto move the flashing in the sequence shown below to select the other
settings.
Home City
(page E-16)
CDST
(page E-18)
C
12/24-Hour Format
C
Seconds
C
CHour
C
Illumination Duration
(page E-37) Minute
CC
Button Operation Tone On/Off
(page E-41) C
Day
C
Month
C
Year

Operation Guide 5611
E-39
Adjusting Hand Positions
The watch hands can go out of alignment with the time on the digital display if it
is exposed to strong magnetism or impact. If this happens, you should adjust the
hand positions.
1. In the Timekeeping Mode, hold down Afor at least
fiveseconds until SUB starts to flash. Release Aafter
SUB flashes.
xThis enters the day of the week hand adjustment
mode.
2. If the day of the week hand is not pointed at the [SU]
position, use Dand Bto move it there.
xHolding down either button moves the hands at high
speed.
Day of the week hand
E-38
To change the illumination duration
1. In the Timekeeping Mode, hold down Auntil the flashing SET indicator
disappears from the display and the currently selected city code appears on the
display.
2. Press Cten times to display the illumination duration setting screen.
xThe current illumination duration setting (1 or 3) will be flashing in the display.
3. Press Dor Bto toggle the illumination duration between three seconds
(3displayed) and 1.5 seconds (1displayed).
4. Press Ato exit the setting mode.
E-37
Illumination
The display of the watch is illuminated for easy reading in the dark.
To turn on illumination
Press Bin any mode to illuminate the display.
xYou can use the procedure below to select either 1.5 seconds or three seconds as
the illumination duration.
Note
xThe LED light will turn off automatically if the alarm starts to sound.
xThe LED light is disabled after holding down Ato display a setting screen, or
while the hands are moving at high speed.
E-36
To turn an alarm and the Hourly Time Signal on and off
In the Alarm Mode, use Dto select an alarm or the
hourly time signal.
xWhen the alarm you want or the Hourly Time Signal
is displayed, press Ato toggle it between on
(ON displayed) and off (– – displayed).
xThe alarm on indicator (when any alarm is on) and the
Hourly Time Signal on indicator (when the Hourly Time
Signal is on) are shown on the display in all modes.
To stop the alarm
Press any button.
Hourly time signal
on indicator
Alarm on indicator
E-35
3. Press Cto move the flashing between the hour and the minute digits.
xThe selected digits are those that are flashing.
4. Use D(+) and B(–) to change the hour and minute settings.
xWhen setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (Pindicator).
5. Press Ato exit the setting mode.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
E-34
xIf you do not perform any operation for about two or three minutes in the Alarm
Mode, the watch will automatically return to the Timekeeping Mode.
To set an alarm time
1. In the Alarm Mode, use Dto display the alarm whose
settings you want to change.
AL1 AL3AL2
AL5SIG AL4
2. Hold down Auntil the flashing SET indicator
disappears from the display and the alarm time hour
digits start to flash. Release Aafter the digits start
to flash.
xALM appears on the display, indicating that alarm
setting is enabled.
Alarm on indicator
E-33
Using the Alarm
You can set five independent daily alarms. When a daily
alarm is turned on, an alarm tone will sound for about
10seconds each day when the time in the Timekeeping
Mode reaches the preset alarm time.
You can also turn on an Hourly Time Signal, which will
cause the watch to beep twice every hour on the hour.
To enter the Alarm Mode
Use Cto select the Alarm Mode as shown on page
E-11.
xAlarm screens are numbered AL1 through AL5. The
Hourly Time Signal screen is indicated by SIG.
xWhen you enter the Alarm Mode, the data you were
viewing when you last exited the mode appears first.
Alarm number
Alarm time
(Hour : Minute)
E-32
To perform a countdown timer operation
DD D D A
Start Stop (Resume) (Stop) Reset
Countdown in Progress
To stop the alarm
Press any button.
E-31
To configure the countdown timer
xIf a countdown timer operation is in progress, press D
to pause it and then press Ato reset the timer to its
start time.
xIf a countdown timer operation is paused, press Ato
reset the timer to its start time.
1. Hold down Auntil the flashing SET indicator
disappears from the display and the hour digits start
to flash. Release Aafter the digits start to flash.
2. Each press of Ccause the flashing to move between settings in the following
sequence: Hours Minutes Seconds.
xThe flashing value is the one that is currently selected for setting.
3. Use D(+) and B(–) to change the currently flashing value.
4. Press Ato exit the setting mode.
E-30
Countdown Timer
The countdown timer start time can be set in 1-second
increments up to a maximum of 24hours. An alarm
sounds when the countdown reaches zero.
To enter the Countdown Timer Mode
Use Cto select the Countdown Timer Mode as shown
on page E-11.
Hours
Minutes
Seconds

Operation Guide 5611
E-49
Operating Precautions
Water Resistance
xThe information below applies to watches with WATER RESIST or WATER
RESISTANT marked on the back cover.
Water
Resistance
Under Daily
Use
Enhanced Water Resistance Under
Daily Use
5
Atmospheres
10
Atmospheres
20
Atmospheres
Marking On watch front or on
back cover
No
BAR mark 5BAR 10BAR 20BAR
Example of
Daily Use
Hand washing, rain Yes Yes Yes Yes
Water-related work, swimming No Yes Yes Yes
Windsurfing No No Yes Yes
Skin diving No No Yes Yes
x Do not use your watch for scuba diving or other types of diving that requires air tanks.
OPUM-E
E-48
Battery: Two silver oxide batteries (Type: SR726W)
Approximate battery operating time: 3 years under the following conditions:
xAlarm: 10 seconds/day
x1 illumination operation (1.5 seconds) per day
Frequent use of illumination runs down the battery.
Specifications are subject to change without notice.
E-47
Stopwatch:
Measuring unit: 1/100 seconds (first hour);
1 second (after first hour)
Measuring capacity: 23:59'59"
Measuring modes: Elapsed time, split time, two finishes
Countdown Timer:
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments)
Alarms: 5 Daily alarms; Hourly time signal
Illumination: Double LED (light-emitting diode); Selectable illumination duration
(approximately 1.5 seconds or 3 seconds)
Other: Button operation tone on/off; Moving the Hands to View the Digital Display
E-46
Specifications
Accuracy at normal temperature: ±15 seconds a month
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, day
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes);
Standard Time/Daylight Saving Time (summer time)
Analog Timekeeping: Hour, minutes (hand moves every 20seconds), day of the
week
World Time: 48 cities (31 time zones) and Coordinated Universal Time (UTC)
Other: Daylight Saving Time/Standard Time
E-45
Main Indicators
Number Name See
1
1
Split indicator E-27
2
2
PM indicator E-15
3
3
Hands shifted indicator E-13
4
4
DST indicator E-18, E-25
5
5
Mute indicator E-41
6
6
Alarm on indicator E-34
7
7
Hourly time signal on indicator E-36
14
7
2 3
65
E-44
World Time Mode
■The time for my World Time City is off in the World Time Mode.
This could be due to incorrect switching between standard time and daylight saving
time. See “To specify standard time or daylight saving time (DST) for a city” (page E-25)
for more information.
E-43
Troubleshooting
Hand Movement and Indications
■The time indicated by the hands is different from the digital time.
This could indicate that the watch has been exposed to strong magnetism or
impact, which has caused problems with proper hand alignment. Adjust the watch’s
hand home position alignment (page E-39).
Time Setting
■The current time setting is off by hours.
Your Home City setting may be wrong (page E-16). Check your Home City setting and
correct it, if necessary.
■The current time setting is off by one hour.
You may need to change your Home City’s standard time/daylight saving time
(DST) setting. Use the procedure under “Adjusting the Digital Time and Date
Settings” (page E-19) to change the standard time/daylight saving time (DST) setting.
E-42
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down Auntil the flashing SET indicator
disappears from the display and the currently selected city code appears on the
display.
2. Press Cnine times to display the button operation tone On/Off screen (page
E-20).
The screen will show either KEY or MUTE.
3. Press Dor Bto toggle the button operation tone setting between enabled
(KEY ) and disabled (MUTE).
4. Press Ato exit the setting mode.
Note
xThe mute indicator is displayed in all modes when the button operation tone is
disabled.
E-41
Button Operation Tone
You can turn the button operation tone on or off as
desired.
xEven if you turn off the button operation tone, alarms,
the Hourly Time Signal, and other beepers all operate
normally.
E-40
3. Press C.
xThis causes 0:00 to flash to indicate the hour and
minute hand adjustment mode.
4. If the hour and minute hands are not at 12o’clock, use
D(+) and B(–) to adjust them until they are.
5. Press Ato return to the Timekeeping Mode.
Check to make sure that the time indicated by the hands
matches the time on the digital display. If the times don’t
match, perform the correction procedure above again.
Hour hand and
minute hand

Operation Guide 5611
E-59
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage
or loss suffered by you or any third party arising through the use of your watch or
its malfunction.
E-58
xUse a soft toothbrush or similar tool to scrub the metal with a weak solution of
water and a mild neutral detergent, or with soapy water. Next, rinse with water
to remove all remaining detergent and then wipe dry with a soft absorbent cloth.
When washing metal components, wrap the watch case with kitchen plastic wrap
so it does not come into contact with the detergent or soap.
Bacteria and Odor Resistant Band
xThe bacteria and odor resistant band protects against odor generated by the
formation of bacteria from sweat, which ensures comfort and hygiene. In order
to ensure maximum bacteria and odor resistance, keep the band clean. Use an
absorbent soft cloth to thoroughly wipe the band clean of dirt, sweat, and moisture.
A bacteria and odor resistant band suppresses the formation of organisms and
bacteria. It does not protect against rash due to allergic reaction, etc.
Liquid Crystal Display
xDisplay figures may be difficult to read when viewed from an angle.
E-57
Leather Band
xAllowing your watch to remain in contact with other items or storing it together with
other items for long periods while it is wet can cause the color of the leather band
to transfer to the other items or the color of the other items to transfer to the leather
band. Be sure to dry off your watch thoroughly with a soft cloth before storing it
and make sure it is not in contact with other items.
xLeaving a leather band where it is exposed to direct sunlight (ultraviolet rays) for
long periods or failure to clean dirt from a leather band for long periods can cause
it to become discolored.
CAUTION: Exposing a leather band to rubbing or dirt can cause color transfer and
discoloration.
Metal Components
xFailure to clean dirt from metal components can lead to formation of rust, even if
components are stainless steel or plated. If metal components exposed to sweat or
water, wipe thoroughly with a soft, absorbent cloth and then place the watch in a
well-ventilated location to dry.
E-56
xLeaving your watch where it is exposed to direct sunlight (ultraviolet rays) for long
periods or failure to clean dirt from your watch for long periods can cause it to
become discolored.
xFriction caused by certain conditions (strong external force, sustained rubbing,
impact, etc.) can cause discoloration of painted components.
xIf there are printed figures on the band, strong rubbing of the printed area can
cause discoloration.
xLeaving your watch wet for long periods can cause fluorescent color to fade. Wipe
the watch dry as soon as possible after it becomes wet.
xSemi-transparent resin parts can become discolored due to sweat and dirt, and if
exposed to high temperatures and humidity for long periods.
xDaily use and long-term storage of your watch can lead to deterioration, breaking,
or bending of resin components. The extent of such damage depends on usage
conditions and storage conditions.
E-55
Chemicals
xDo not allow your watch to come into contact with thinner, gasoline, solvents,
oils, or fats, or with any cleaners, adhesives, paints, medicines, or cosmetics that
contain such ingredients. Doing so can cause discoloration of or damage to the
resin case, resin band, leather, and other parts.
Storage
xIf you do not plan to use your watch for a long time, thoroughly wipe it free of all
dirt, sweat, and moisture, and store it in a cool, dry place.
Resin Components
xAllowing your watch to remain in contact with other items or storing it together with
other items for long periods while it is wet can cause color on resin components
to transfer to the other items, or the color of the other items to transfer to the resin
components of your watch. Be sure to dry off your watch thoroughly before storing
it and make sure it is not in contact with other items.
E-54
Magnetism
xThe hands of analog and combination (analog-digital) watches are moved by a
motor that uses magnetic force. When such a watch is close to a device (audio
speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the
magnetism can cause timekeeping to slow down, speed up, or stop, resulting in the
incorrect time being displayed.
xVery strong magnetism (from medical equipment, etc.) should be avoided because
it can cause malfunction of your watch and damage to electronic components.
Electrostatic Charge
xExposure to very strong electrostatic charge can cause your watch to display
the wrong time. Very strong electrostatic charge even can damage electronic
components.
xElectrostatic charge can cause the display to go blank momentarily or cause a
rainbow effect on the display.
E-53
Temperature
xNever leave your watch on the dashboard of a car, near a heater, or in any other
location that is subject to very high temperatures. Do not leave your watch where
it will be exposed to very low temperatures. Temperature extremes can cause your
watch to lose or gain time, to stop, or otherwise malfunction.
xLeaving your watch in an area hotter than +60°C (140°F) for long periods can lead
to problems with its LCD. The LCD may become difficult to read at temperatures
lower than 0°C (32°F) and greater than +40°C (104°F).
Impact
xYour watch is designed to withstand impact incurred during normal daily use and
during light activity such as playing catch, tennis, etc. Dropping your watch or
otherwise subjecting it to strong impact, however, can lead to malfunction. Note
that watches with shock-resistant designs (G-SHOCK, BABY-G, G-MS) can be
worn while operating a chain saw or engaging in other activities that generate
strong vibration, or while engaging in strenuous sports activities (motocross, etc.)
E-52
Band
xTightening the band too tightly can cause you to sweat and make it difficult for air
to pass under the band, which can lead to skin irritation. Do not fasten the band too
tightly. There should be enough room between the band and your wrist so you can
insert your finger.
xDeterioration, rust, and other conditions can cause the band to break or come off
of your watch, which in turn can cause band pins to fly out of position or to fall out.
This creates the risk of your watch falling from your wrist and becoming lost, and
also creates the risk of personal injury. Always take good care of your band and
keep it clean.
xImmediately stop using a band if you even notice any of the following: loss of band
flexibility, band cracks, band discoloration, band looseness, band connecting
pin flying or falling out, or any other abnormality. Take your watch to your original
retailer or to a CASIO service center for inspection and repair (for which you will be
charged) or to have the band replaced (for which you will be charged).
E-51
xA trained technician will inspect your watch for proper water resistance whenever
you have its battery replaced. Battery replacement requires the use of special tools.
Always request battery replacement from your original retailer or from an authorized
CASIO service center.
xSome water-resistant watches come with fashionable leather bands. Avoid
swimming, washing, or any other activity that causes direct exposure of a leather
band to water.
xThe inside surface of the watch glass may fog when the watch is exposed to a
sudden drop in temperature. No problem is indicated if the fogging clears up
relatively quickly. Sudden and extreme temperature changes (such as coming into
an air conditioned room in the summer and standing close to an air conditioner
outlet, or leaving a heated room in the winter and allowing your watch to come into
contact with snow) can cause it to take longer for glass fogging to clear up. If glass
fogging does not clear up or if you notice moisture inside of the glass, immediately
stop using your watch and take it to your original retailer or to an authorized CASIO
service center.
xYour water-resistant watch has been tested in accordance with International
Organization for Standardization regulations.
E-50
xWatches that do not have WATER RESIST or WATER RESISTANT marked on
the back cover are not protected against the effects of sweat. Avoid using such
a watch under conditions where it will be exposed to large amounts of sweat or
moisture, or to direct splashing with water.
xEven if a watch is water resistant, note the usage precautions described below.
Such types of use reduce water resistance performance and can cause fogging of
the glass.
– Do not operate the crown or buttons while your watch is submersed in water or
wet.
– Avoid wearing your watch while in the bath.
– Do not wear your watch while in a heated swimming pool, sauna, or any other
high temperature/high humidity environment.
– Do not wear your watch while washing your hands or face, while doing
housework, or while performing any other task that involves soaps or detergents.
xAfter submersion in seawater, use plain water to rinse all salt and dirt from your
watch.
xTo maintain water resistance, have the gaskets of your watch replaced periodically
(about once every two or three years).

Operation Guide 5611
E-64
Low Battery Power
xLow battery power is indicated by large timekeeping error, by dim display contents,
or by a blank display.
xOperation while battery power is low can result in malfunction. Replace the
batteries as soon as possible.
E-63
Battery Replacement
xLeave battery replacement up to your original retailer or authorized CASIO service
center.
xHave the batteries replaced only with the type specified in the User’s Guide. Use of
a different battery type can cause malfunction.
xWhen replacing the batteries, also request a check for proper water resistance.
xOrnamental resin components may become worn, cracked, or bent over
time when subjected to normal daily use. Note that if cracking or any other
abnormality indicating possible damage is noticed in a watch submitted for battery
replacement, your watch will be returned with an explanation of the abnormality,
without the requested servicing being performed.
Initial Batteries
xThe batteries that come loaded in your watch when you purchase it are used for
function and performance testing at the factory.
xTest batteries may go dead quicker than the normally rated battery life as noted in
the User’s Guide. Note that you will be charged for replacement of these batteries,
even if replacement is required within your watch’s warranty period.
E-62
xRust can cause sharp areas on metal components and can cause band pins to fly
out of position or to fall out. If you ever notice any abnormality immediately stop
using your watch and take it to your original retailer or to an authorized CASIO
service center.
xEven if the surface of the metal appears clean, sweat and rust in crevasses can
soil the sleeves of clothing, cause skin irritation, and even interfere with watch
performance.
Premature Wear
xLeaving sweat or water on a resin band or bezel, or storing your watch an area
subject to high moisture can lead to premature wear, cuts, and breaks.
Skin Irritation
xIndividuals with sensitive skin or in poor physical condition may experience skin
irritation when wearing a watch. Such individuals should keep their leather band
or resin band particularly clean. Should you ever experience a rash or other skin
irritation, immediately remove your watch and contact a skin care professional.
E-61
xFor a resin band, wash with water and then wipe dry with a soft cloth. Note that
sometimes a smudge like pattern may appear on the surface of a resin band. This
will not have any effect on your skin or clothing. Wipe with a cloth to remove the
smudge pattern.
xClean water and sweat from a leather band by wiping with a soft cloth.
xNot operating a watch crown, buttons, or rotary bezel could lead to later problems
with their operation. Periodically rotate the crown and rotary bezel, and press
buttons to maintain proper operation.
Dangers of Poor Watch Care
Rust
xThough the metal steel used for your watch is highly rust-resistant, rust can form if
your watch is not cleaned after it becomes dirty.
– Dirt on your watch can make it impossible for oxygen to come into contact with
the metal, which can lead to breakdown of the oxidization layer on the metal
surface and the formation of rust.
E-60
User Maintenance
Caring for Your Watch
Remember that you wear your watch next to your skin, just like a piece of clothing.
To ensure your watch performs at the level for which it is designed, keep it clean by
frequently wiping with a soft cloth to keep your watch and band free of dirt, sweat,
water and other foreign matter.
xWhenever your watch is exposed to sea water or mud, rinse it off with clean fresh
water.
xFor a metal band or a resin band with metal parts, use a soft toothbrush or similar
tool to scrub the band with a weak solution of water and a mild neutral detergent,
or with soapy water. Next, rinse with water to remove all remaining detergent and
then wipe dry with a soft absorbent cloth. When washing the band, wrap the watch
case with kitchen plastic wrap so it does not come into contact with the detergent
or soap.
L-2
City
Code City UTC Offset/ GMT Differential
MOW Moscow +3
JED Jeddah
THR Tehran +3.5
DXB Dubai +4
KBL Kabul +4.5
KHI Karachi +5
DEL Delhi +5.5
KTM Kathmandu +5.75
DAC Dhaka +6
RGN Yangon +6.5
BKK Bangkok +7
SIN Singapore
+8
HKG Hong Kong
BJS Beijing
TPE Taipei
City
Code City UTC Offset/ GMT Differential
SEL Seoul +9
TYO Tokyo
ADL Adelaide +9.5
GUM Guam +10
SYD Sydney
NOU Noumea +11
WLG Wellington +12
x This table shows the city codes of this
watch (As of January 2019).
x The rules governing global times
(GMT differential and UTC offset) and
summer time are determined by each
individual country.
L-1
City Code Table
City
Code City UTC Offset/ GMT Differential
PPG Pago Pago –11
HNL Honolulu –10
ANC Anchorage –9
YVR Vancouver –8
LAX Los Angeles
YEA Edmonton –7
DEN Denver
MEX Mexico City –6
CHI Chicago
NYC New York –5
YHZ Halifax –4
YYT St. John’s –3.5
BUE Buenos Aires –3
RIO Rio De Janeiro
City
Code City UTC Offset/ GMT Differential
FEN Fernando de
Noronha –2
RAI Praia –1
UTC
0LIS Lisbon
LON London
MAD Madrid
+1
PAR Paris
ROM Rome
BER Berlin
STO Stockholm
ATH Athens
+2CAI Cairo
JRS Jerusalem
L
City Code Table
CASIO COMPUTER CO., LTD.
6-2, Hon-machi 1-chome
Shibuya-ku, Tokyo 151-8543, Japan