© 2022 CASIO COMPUTER CO., LTD.
MA2203-A
User’s Guide
Watch
3512 EN
EN-1
About This Manual
• Depending 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.
• 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.
EN-2
Contents
About This Manual .............................................................................................. EN-1
Watch Features ................................................................................................... EN-5
Selecting a Mode ................................................................................................ EN-6
Timekeeping ........................................................................................................ EN-8
To set the time and date ..................................................................................EN-9
To toggle between 12-hour and 24-hour timekeeping ..................................EN-11
To toggle the Timekeeping Mode between DST and Standard Time ............EN-12
Stopwatch ......................................................................................................... EN-13
To measure elapsed time ...............................................................................EN-17
To measure elapsed time with lap times ........................................................EN-18
To measure elapsed time with split times ......................................................EN-21
To time first and second place finishes ..........................................................EN-23
EN-3
Recall Mode ...................................................................................................... EN-26
To recall stopwatch time records ...................................................................EN-27
To delete a log ...............................................................................................EN-29
Timer .................................................................................................................. EN-30
To use the countdown timer ..........................................................................EN-31
To configure countdown start time and auto-repeat settings ........................EN-32
Alarm .................................................................................................................. EN-34
To set an alarm time .......................................................................................EN-36
To test the alarm ............................................................................................EN-38
To select the operation of Alarm 1 .................................................................EN-39
To turn Alarms 2 and 3 on and off .................................................................EN-40
To turn the hourly time signal on and off .......................................................EN-41
Dual Time .......................................................................................................... EN-42
To set the Dual Time ......................................................................................EN-42
EN-4
Illumination ........................................................................................................ EN-45
To illuminate the display .................................................................................EN-45
To specify the illumination duration ...............................................................EN-46
Reference .......................................................................................................... EN-47
To turn the button operation tone on and off .................................................EN-48
Specifications ................................................................................................... EN-50
Operating Precautions ..................................................................................... EN-52
User Maintenance ............................................................................................ EN-63
EN-5
Watch Features
◆
Stopwatch
◆
Timer
◆
Alarm
◆
Dual Time
EN-6
Selecting a Mode
• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press B to illuminate
the face of the watch.
Stopwatch ModeTimekeeping Mode Recall Mode
CC
C
EN-7
CC
C
Timer Mode
Alarm Mode
Dual Time Mode
EN-8
Timekeeping
Use the Timekeeping Mode to set and view the
current time and date.
PM indicator
Month – Day
Day of week
Second
Hour Minute
EN-9
To set the time and date
1. In the Timekeeping Mode, hold down A until the
second starts to flash, which indicates the setting
screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Second
MinuteHourDST
Day YearMonth
C C
CC
CC
C
Second
EN-10
3. When the setting you want to change is flashing, use B and D to change it as
described below.
Screen To do this: Do this:
Reset the second to 00
Press D.
Toggle between Daylight Saving Time (On) and
Standard Time (OF)
Change the hour or minute
Use B (–) and D (+).
Change the year
Change the month or day
EN-11
4. Press A to exit the setting screen.
• The day of the week is displayed automatically in accordance with the date
(year, month, and day) settings.
• See “Daylight Saving Time (DST) Setting” below for details about the DST
setting.
To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press D to toggle between 12-hour timekeeping and
24-hour timekeeping.
• 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 p.m. and the A (AM) indicator appears to
the left of the hour digits for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
• The A and P indicators are not displayed with the Timekeeping Mode time on the
Timer Mode and Dual Time Mode screens.
EN-12
Daylight Saving Time (DST) Setting
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
To toggle the Timekeeping Mode between DST and Standard Time
1. In the Timekeeping Mode, hold down A until the
second starts to flash, which indicates the setting
screen.
2. Press C once and the DST setting screen appears.
3. Press D to toggle between Daylight Saving Time (On
displayed) and Standard Time (OF displayed).
4. Press A to exit the setting screen.
• The DST indicator appears on the Timekeeping and
Alarm Mode screens to indicate that Daylight Saving
Time is turned on.
DST indicator
On/Off status
EN-13
Stopwatch
The stopwatch lets you measure elapsed time, lap
times, split times, and two finishes. Lap times and
split times can be stored in memory.
• The display range of the stopwatch is 99hours,
59minutes, 59seconds.
• All of the operations in this section are performed in
the Stopwatch Mode, which you enter by pressing
C (page EN-6).
Note
• “Lap time” is the time spent to cover a specific
segment of a race, such as one lap around a track.
“Split time” is the time spent from the beginning of a
race up to a certain point.
• The stopwatch continues to run, restarting from
zero after it reaches its limit, until you stop it.
Remaining free records
Hours 1/100 second
Minutes Seconds
EN-14
• The stopwatch measurement operation continues even if you exit the Stopwatch
Mode.
• For information about how stopwatch times are stored in memory, see “Memory
Management” (page EN-24).
Viewing the Stopwatch Displays
The information that appears in the watch’s upper and lower displays depends on
whether you are measuring lap times or split times.
Lap Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time
Split Time Measurement
Upper Display: Lap time
Lower Display: Elapsed time (Split time appears here for eight seconds as it is stored
in memory.)
EN-15
• See “To measure elapsed time with lap times” (page EN-18) and “To measure
elapsed time with split times” (page EN-21) for more information about each type of
measurement.
• You can perform elapsed time measurement starting from either the lap time
screen or the split time screen (pages EN-18 and EN-21). Whenever you enter the
Stopwatch Mode, the screen (lap time or split time) that was displayed when you
last exited the mode will appear first.
• During a stopwatch elapsed time operation, the upper display initially shows
minutes, seconds, and a 1/100-second value. This changes to hours, minutes, and
seconds when the time in the upper display exceeds 60 minutes.
• The lower display initially shows hours, minutes, seconds, and a 1/100-second
value. This changes to hours, minutes, and seconds when the time in the lower
display exceeds 10 hours.
EN-16
Seconds
More than 10 hours
More than one hour
Minutes
Seconds
1/100 second
Hours
Minutes 1/100 second
Hours
Minutes
Seconds
Hours Minutes
Seconds
EN-17
To measure elapsed time
Note
• You can perform the following steps starting from either the lap time screen or the
split time screen.
1. Press D to start the stopwatch.
2. Press D again to stop the stopwatch.
• You can resume the measurement operation by pressing D.
3. Press A to clear the stopwatch to all zeros.
EN-18
To measure elapsed time with lap times
1. When the stopwatch display shows all zeros, press A
to display the lap time screen (indicated by LAP).
2. Press D to start an elapsed time measurement.
• At the time, both the upper and lower displays will
show identical times.
3. Press A to record the time of the first lap.
EN-19
Lap time
Elapsed time Lap number
Lap time
• This freezes the current lap time in the upper part of the display for about
eight seconds, while measurement of total elapsed time and the next lap time
continue internally. The lap number of the displayed time appears in the lower
display.
• After eight seconds, the ongoing elapsed time measurement re-appears in the
lower display.
EN-20
4. Repeat step 3 to record more lap times.
5. Press D to stop the stopwatch.
6. Press A to clear the stopwatch to all zeros.
• Lap numbers are incremented automatically starting from 1 whenever you press
A in step 3 of the above procedure. The maximum lap number is 99. Recording
a lap after that causes the lap number count to restart from 00.
EN-21
To measure elapsed time with split times
1. When the stopwatch display shows all zeros, press A
to display the split time screen (indicated by SPL).
2. Press D to start an elapsed time measurement.
• At the time, both the upper and lower displays will
show identical times.
3. Press A to record the time of the first split.
• The current split time appears in the lower display
for about eight seconds, as the total elapsed time,
next lap time, and next split time continue to be
timed internally by the watch. The split number of the
displayed time appears in the upper display.
• After eight seconds, the ongoing lap time
measurement appears in the upper display and the
ongoing elapsed time measurement appears in the
lower display.
Lap time
Elapsed time
EN-22
4. Repeat step 3 to record more split times.
5. Press D to stop the stopwatch.
6. Press
A to clear the stopwatch to all zeros.
• Split numbers are incremented automatically starting
from 1 whenever you press
A in step 3 of the
above procedure. The maximum split number is
99. Recording a split time after that causes the split
number count to restart from 00.
Split number
Split time
Split Time Recording
(Displayed for eight seconds
after A is pressed.)
EN-23
To time first and second place finishes
1. When the stopwatch display shows all zeros, press
A to display the split time
screen (indicated by SPL).
2. Press D to start a time measurement.
3. Press
A when the first finisher crosses the finish line.
• This freezes the time of the first finisher in the lower part of the display for about
eight seconds. After that, the display returns to elapsed time measurement.
4. Press D when the second finisher crosses the finish line.
• The second finisher’s time will appear in the lower display.
• The difference between the first finisher’s and the second finisher’s time will
appear in the upper display.
5. Press
A to clear the stopwatch to all zeros.
EN-24
Memory Management
A new log is created each time you press D in the Stopwatch Mode to start a new
elapsed time measurement operation. A log contains a log title screen, and records
of all the lap or split times you record during the current elapsed time measurement
operation.
• The capacity of the watch’s memory is 60 records.
• If you are adding records to a log when there are multiple logs in memory and
watch memory becomes full, adding another record causes the oldest log in
memory and all of its records to be deleted automatically to make room for new
records.
EN-25
How stopwatch data is stored
The following table shows how stopwatch data is stored when you perform
stopwatch button operations.
Stopwatch Button Operation Data Storage Description
From all-zeros, press D to start.
Creates a new log. Stores the date the button was
pressed, and the new log number.
Press A to display lap/split time.
Creates a new record with each button operation.
Stores the lap and split times and total elapsed time
at each point the button is pressed.
Press D to stop elapsed time
measurement and then press A
to reset.
Resets the elapsed time to all zeros without recording
data.
• See “Recall Mode” (page EN-26) for details on how to recall time records from
memory.
EN-26
Recall Mode
Use the Recall Mode to recall and delete logs and records
you stored in the Stopwatch Mode. You can use the Recall
Mode to view both lap and split time records.
• When you enter the Recall Mode, the newest log
recorded in the Stopwatch Mode will appear first. If there
are no logs in memory,
– – – – appears on the display.
• You can use the Recall Mode to check memory data
even while a stopwatch elapsed time measurement
operation is in progress. However, the time data that is
currently being measured will not appear in the Recall
Mode.
• You can convert a lap time saved in the Stopwatch
Mode to a split time (page EN-27).
Month – Day
Day of week
Log number
Log Title Screen
EN-27
To recall stopwatch time records
1. In the Stopwatch Mode, check to make sure that the displays reset to all zeros
(page EN-17).
• If all zeros are not displayed, reset the stopwatch.
2. Use the A button to select either the lap time screen (to view lap time records) or
the split time screen (to view split time records) (pages EN-18 and EN-21).
• To convert a lap time saved in the Stopwatch Mode to a split time, select the
split time screen.
3. Press the C button to enter the Recall Mode.
4. Use the A button to scroll through the log title screens from the newest to the
oldest until the title screen of the log whose records you want to view is displayed.
5. Press D to scroll through the records contained in the log you selected in step 4,
from the oldest to the newest.
EN-28
First record Last record
Log Title Screen
DD
Lap time Lap number
Split number Split time
Log number
EN-29
• Whether you will be able to view lap time records or split time records will
depend on the screen you selected in step 2, above.
To delete a log
1. In the Recall Mode, display the title screen of the log you want to delete.
2. Hold down B and D until CLR stops flashing on the display.
• This deletes the log and all the records inside it.
• Deleting a single log slides all newer logs (ones with higher log numbers)
upwards to fill the empty space. This cause the log numbers of all the newer
logs to be reduced by 1. If there are six logs currently in memory (numbered 01
through 06) and you delete log 03, the numbers of logs that previously were
numbered 04, 05, and 06 will change to 03, 04, and 05.
EN-30
Timer
You can set the countdown timer within a range of one
minute to 24 hours. An alarm sounds when the countdown
reaches zero.
• You also can select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
• All of the operations in this section are performed in
the Timer Mode, which you enter by pressing C (page
EN-7).
Auto-repeat on indicator
Seconds
Timekeeping Mode time
Hours Minutes
EN-31
To use the countdown timer
Press D while in the Timer Mode to start the countdown timer.
• When the end of the countdown is reached and auto-repeat is turned off, the alarm
sounds for 10 seconds or until you stop it by pressing any button. The countdown
time is reset automatically to its starting value after the alarm stops.
• When auto-repeat is turned on, the countdown will restart automatically without
pausing when it reaches zero. The alarm sounds when the countdown reaches
zero.
• The countdown timer measurement operation continues even if you exit the 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 A. This returns the countdown time to its starting value.
EN-32
To configure countdown start time and auto-repeat settings
1. While the countdown start time is on the display in the
Timer Mode, hold down A until the hour setting of the
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” (page
EN-31) to display it.
2. Press C to move the flashing in the sequence shown
below, and select the setting you want to change.
C C
Start Time
(Hours)
Start Time
(Minutes)
Auto-Repeat
On/Off
C
Auto-repeat on indicator
On/Off status
EN-33
3. Perform the following operations, depending on which setting currently is selected
on the display.
• While the start time setting is flashing, use B (–) and D (+) to change it.
• Set 0:00 to specify 24 hours.
• While the auto-repeat on/off setting (On or OF) is flashing on the display, press
D to toggle auto-repeat on (On) and off (OF).
4. Press A to exit the setting screen.
• The auto-repeat on indicator (
) is displayed on the Timer Mode screen while
this function is turned on.
• Frequent use of auto-repeat and the alarm can run down battery power.
EN-34
Alarm
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. One of the alarms has a snooze feature.
You also can turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
• There are three alarm screens numbered 1 through 3.
The hourly time signal screen is indicated by :00.
• All of the operations in this section are performed in
the Alarm Mode, which you enter by pressing C (page
EN-7).
Alarm time (Hour : Minute)
Alarm date (Month − Day)
Alarm number
EN-35
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 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.
EN-36
To set an alarm time
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
–1 –3–2 :00
D DD
D
• Alarm 1 has a snooze feature.
• The snooze alarm operation repeats every five
minutes.
2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash. This indicates the setting screen.
• This operation turns on the alarm automatically.
EN-37
3. Press C to move the flashing in the sequence shown below to select other
settings.
Hour Minute
Month
Day
C C C
C
4. While a setting is flashing, use B (–) and D (+) to change it.
• To set an alarm that does not include a month (daily alarm, monthly alarm), set
− for the month. Use B and D until the − 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 − −
for the day. Use B and D until the − − mark appears (between the end of the
month 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. (A indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
EN-38
Alarm Operation
The alarm sounds at the preset time for about 10 seconds. When the snooze feature
(Alarm1) is turned on, the alarm operation is performed a total of seven times, every
five minutes, until you turn the alarm off or turn off the snooze feature (page EN-39).
• Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
Note
• Pressing any button stops the alarm tone operation.
• Performing any one of the operations below during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen (page EN-9)
Displaying the Alarm 1 setting screen (page EN-36)
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
EN-39
To select the operation of Alarm 1
1. In the Alarm Mode, use D to select Alarm 1.
2. Press A to cycle through the available settings in the sequence shown below.
A AA
Alarm on Snooze feature on Alarm off
• The applicable alarm on indicator is displayed in all modes when an alarm is
turned on.
• The snooze indicator flashes while the snooze alarm is sounding and during the
5-minute intervals between alarms.
EN-40
• Displaying the Alarm 1 setting screen (page EN-36) while the snooze alarm is
turned on turns off the snooze alarm automatically.
To turn Alarms 2 and 3 on and off
1. In the Alarm Mode, use D to select alarm number 2
or 3.
2. Press A to toggle the displayed alarm on and off.
• Turning on an alarm (2 or 3) displays the alarm on
indicator on its screen.
• The alarm on indicator is displayed in all modes.
• If any alarm is on, the alarm on indicator is shown on
the display in all modes.
Alarm on indicator
EN-41
To turn the hourly time signal on and off
1. In the Alarm Mode, use D to select the Hourly Time
Signal.
2. Press A to toggle the displayed item on and off.
• Turning on the Hourly Time Signal displays the hourly
time signal on indicator on its screen.
• The hourly time signal on indicator is displayed in all
modes.
Hourly time signal
on indicator
EN-42
Dual Time
The Dual Time Mode lets you keep track of time in a
different time zone. You can select Standard Time or
Daylight Saving Time for the Dual Time.
• The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time
1. Press C to enter the Dual Time Mode (page EN-7).
2. In the Dual Time Mode, hold down A until the DST
setting starts to flash, which indicates the setting
screen.
Timekeeping Mode time
Dual time
(Hour : Minute Second)
EN-43
3. Press C to move the flashing in the sequence shown below to select the other
settings.
DST Hour Minute
C C
C
4. When the setting you want to change is flashing, use B and D to change it as
described below.
Screen To do this: Do this:
Toggle between Daylight Saving Time (On)
and Standard Time (OF)
Press D.
Change the hour or minute
Use B (–) and D (+).
EN-44
5. Press A to exit the setting screen.
• The DST indicator on the Dual Time Mode screen indicates that DST is turned
on for the Dual Time Mode time.
EN-45
Illumination
An LED (light-emitting diode) illuminates the face of the
watch for easy reading in the dark.
• See “Illumination Precautions” (page EN-49) for other
important information about using illumination.
To illuminate the display
In any mode, press B to turn on illumination.
• You can use the procedure below to select either
1.5seconds or 3seconds as the illumination duration.
When you press B, illumination will remain on for about
1.5seconds or 3seconds, depending on the current
illumination duration setting.
EN-46
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. While the seconds are flashing, press B to toggle the
setting between 1.5seconds (−) and 3seconds (
).
3. Press A to exit the setting screen.
EN-47
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
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch saves any settings you have made up
to that point and exits the setting screen automatically.
• The watch will change to the Timekeeping Mode automatically if you do not
perform any operation in the Recall Mode or Alarm Mode for two or three minutes.
EN-48
Button Operation Tone
The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.
• The multi-function alarms and Timer Mode alarm will
sound even if the button operation tone is turned off.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down C to toggle the button operation tone
on (mute indicator not displayed) and off (mute indicator
displayed).
• Holding down C to turn the button operation tone on or
off also causes the watch’s current mode to change.
• The mute indicator is displayed in all modes when the
button operation tone is turned off.
Mute indicator
EN-49
Scrolling
The B and D buttons are used in various modes and setting screens 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.
Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to
59causes the minutes to be increased by 1. In the range of 00 to 29, the seconds
are reset to 00 without changing the minutes.
• The year can be set in the range of 2000 to 2099.
• The 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 batteries replaced.
Illumination Precautions
• Illumination may be difficult to see when viewed under direct sunlight.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination runs down the battery.
EN-50
Specifications
Accuracy at normal temperature: ± 30 seconds a month
Timekeeping: Hour, minute, second, a.m. (A)/ p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Daylight Saving Time (summer time)/Standard Time
Stopwatch:
Measurement Capacity: 99hours, 59minutes, 59seconds
Measurement Units: Depends on range.
Lap Times: 1/100 second from 00:0000 to 00:5959.99; 1second from 1:0000to
99:5959
Split Times: 1/100 second from 00:0000 to 09:5959.99; 1 second from
10:0000to 99:5959
Measurement Types: Elapsed time, lap times, split times, two finishes
Memory Capacity: 60records (used for lap times and split times)
Other: Lap/split numbers
EN-51
Timer:
Measuring unit: one second
Input range: one minute to 24 hours (1-minute increments and 1-hour increments)
Other: Auto-repeat timing
Alarm: 3 Multi-function* alarms (1 with snooze feature); Hourly Time Signal
* Alarm type: Daily alarm, Date alarm, 1-month alarm, Monthly alarm
Dual Time: Hour, minute, second, a.m. (A)/p.m. (P)
Other: Daylight Saving Time (summer time)/Standard Time
Illumination: LED (light-emitting diode); Selectable illumination duration
(approximately 1.5seconds or 3seconds)
Other: Button operation tone on/off
Battery:
One lithium battery (Type: CR1620)
Approximately 5 years on type CR1620 (10 seconds of alarm operation per day,
one illumination operation (1.5 seconds) per day)
Specifications are subject to change without notice.
EN-52
Operating Precautions
Water Resistance
• The 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
•
Do not use your watch for scuba diving or other types of diving that requires air tanks.
OPUM-G
EN-53
• Watches 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.
• Even 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.
• After submersion in seawater, use plain water to rinse all salt and dirt from your
watch.
• To maintain water resistance, have the gaskets of your watch replaced periodically
(about once every two or three years).
EN-54
• A 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.
• Some 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.
• The 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.
• Your water-resistant watch has been tested in accordance with International
Organization for Standardization regulations.
EN-55
Band
• Tightening 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.
• Deterioration, 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.
• Immediately 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).
EN-56
Temperature
• Never 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.
• Leaving 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
• Your 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.)
EN-57
Magnetism
• Though a digital watch normally is not affected by magnetism, very strong
magnetism (from medical equipment, etc.) should be avoided because it can cause
malfunction and damage to electronic components.
Electrostatic Charge
• Exposure to very strong electrostatic charge can cause your watch to display
the wrong time. Very strong electrostatic charge even can damage electronic
components.
• Electrostatic charge can cause the display to go blank momentarily or cause a
rainbow effect on the display.
Chemicals
• Do 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.
EN-58
Storage
• If 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
• Allowing 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.
• Leaving 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.
• Friction caused by certain conditions (strong external force, sustained rubbing,
impact, etc.) can cause discoloration of painted components.
• If there are printed figures on the band, strong rubbing of the printed area can
cause discoloration.
EN-59
• Leaving your watch wet for long periods can cause fluorescent color to fade. Wipe
the watch dry as soon as possible after it becomes wet.
• Semi-transparent resin parts can become discolored due to sweat and dirt, and if
exposed to high temperatures and humidity for long periods.
• Daily 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.
Leather Band
• Allowing 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.
EN-60
• Leaving 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
• Failure 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.
• Use 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.
EN-61
Bacteria and Odor Resistant Band
• The 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
• Display figures may be difficult to read when viewed from an angle.
Watch with Data Memory
• Allowing the battery to go dead, replacing the battery, or having your watch
repaired can cause all data in watch memory to be lost. Note that CASIO
COMPUTER CO., LTD. assumes no responsibility for any damages or losses
caused by data lost due to malfunction or repair of your watch, replacement of the
battery, etc. Be sure to keep separate written copies of all important data.
EN-62
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.
EN-63
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.
• Whenever your watch is exposed to sea water or mud, rinse it off with clean fresh
water.
• For 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.
• For 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.
EN-64
• Clean water and sweat from a leather band by wiping with a soft cloth.
• Not 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
• Though 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.
• Rust 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.
EN-65
• Even 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
• Leaving 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
• Individuals 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.
EN-66
Battery Replacement
• Leave battery replacement up to your original retailer or authorized CASIO service
center.
• Have the battery replaced only with the type specified in the User’s Guide. Use of a
different battery type can cause malfunction.
• When replacing the battery, also request a check for proper water resistance.
• Ornamental 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 Battery
• The battery that comes loaded in your watch when you purchase it is used for
function and performance testing at the factory.
• The test battery 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 this battery,
even if replacement is required within your watch’s warranty period.
EN-67
Low Battery Power
• Low battery power is indicated by large timekeeping error, by dim display contents,
or by a blank display.
• Operation while battery power is low can result in malfunction. Replace the battery
as soon as possible.
CASIO COMPUTER CO., LTD.
6-2, Hon-machi 1-chome
Shibuya-ku, Tokyo 151-8543, Japan
