Casio Wave Ceptor WVA-320J-1E User manual

Operation Guide 4319
1
MO0905-EA
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of
your purchase, read this manual carefully.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright light.
•Read “Power Supply” of this manual for important information you need to
know when exposing the watch to bright light.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch
where it is not exposed to light causes the battery to run
down. Make sure the watch is exposed to light as much as
possible.
•When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.
•You should try to keep the watch outside of your sleeve
as much as possible. Charging is reduced significantly if
the face is only partially covered.
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Bright Light
Solar cell
•The watch continues to operate, even when it is not exposed to light. Leaving the
watch in the dark can cause the battery to run down, which will result in some watch
functions to be disabled. If the battery goes dead, you will have to re-configure watch
settings after recharging. To ensure normal watch operation, keep it exposed to light
as much as possible.
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Charge
Rechargeable battery
Bright Light
Electrical
energy
Solar cell
(Converts light to
electrical power.)
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Some or all
functions
disabled
Dis-
charge
Battery charges in the light. Battery discharges in the dark.
•The actual level at which some functions are disabled depends on the watch model.
•Be sure to read “Power Supply”for important information you need to know
when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
•See “Power Saving Function”for more information.
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 this
product or its malfunction.
About This Manual
•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.
▲
▲
Alarm Mode
Stopwatch Mode
▲
Timekeeping Mode
Press C.
▲
World Time Mode
Hand Setting Mode
General Guide
•Press Cto change from mode to mode.
•In any mode, press Bto illuminate the face of the watch.
▲
▲
Battery Level Indicator
Radio-controlled Timekeeping
This watch receives a time calibration signal and updates
its time setting accordingly. The time calibration signal
includes both Standard Time and Daylight Saving Time
(summer time) data.
•This watch is designed to pick up the time calibration
signals transmitted from Fort Collins, Colorado in the
United States, and from Fukushima and Fukuoka/Saga
in Japan.
Day
Day of week
Minute hand
Hour hand
Second hand
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration
signal. You can also perform a manual procedure to set the time and date, when
necessary.
•The first thing you should do after purchasing this watch is to set your Home City,
which is the city where you normally will use the watch. For more information, see
“To set your Home City” below.
•When using the watch in an area that is outside the ranges of its time calibration
signal reception, you need to adjust the time and date as required manually. See
“Timekeeping” for details about manual settings.
•The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is adjusted automatically whenever you change the digital
setting. See “Analog Timekeeping” for more information.
To set your Home City
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
2. Use D(east) and B(west) to select the city code you
want to use as your Home City.
•The following are the city codes for time zones that
support time calibration reception.
HKG: Hong Kong
SEL: Seoul
TYO: Tokyo
HNL: Honolulu
ANC: Anchorage
LAX: Los Angeles
DEN: Denver
CHI: Chicago
NYC: New York
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City code
3. Press Ato exit the setting screen.
•The second hand will advance at high speed to the correct position in accordance
with seconds count of the digital time, and resume normal movement from there.
•Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive (in
the middle of the night). You can also perform manual receive or you can set the time
manually.
•If you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting.
•The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see
“Transmitters”.
To display the digital time and last signal screen
•In the Timekeeping Mode, press Dto display the last signal screen. The last signal
screen shows the date and time of the last successful time calibration signal
reception.
•In the Timekeeping Mode, press Ato cycle through the digital time screens as
shown below.
Day of week
Press A.
Day
▲
Receiving indicator
▲
A
2 seconds
A
Hour :
Minutes
Reception Time
PM indicator
Date Screen
Receiving
Indicator and
Seconds Count
Current Time
Screen
▲
Seconds
Last Signal Screen
Reception date
▲
▲
Press D.
Or
2 seconds
2 seconds

Operation Guide 4319
2
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
•Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to
six times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
•Manual Receive
Manual receive lets you start time calibration signal reception with the press of a
button. For more information, see “To perform manual receive”.
Important!
•When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
12 o’clock
or
•Make sure the watch is facing the right way.
•Proper signal reception can be difficult or even impossible under the conditions listed
below.
•Signal reception normally is better at night than during the day.
•Time calibration signal reception takes from two to seven minutes, but in some
cases it can take as long as 14 minutes. Take care that you do not perform any
button operations or move the watch during this time.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference may also cause problems with reception.
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
Reception Ranges
U.S. Signal
Fort Collins
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
1,000 kilometers
1,000 kilometers
Fukuoka/Saga
500 kilometers
Fukushima
500 kilometers
Japan Signals
•Even when the watch is within the reception range of the transmitter, signal
reception will be impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
•Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
•See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
About Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to six
times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. The start times of the auto receive operations depend
on the current Home City and DST settings.
Home City: HKG, SEL, TYO, HNL, ANC, LAX, DEN, CHI, NYC
Standard Time Auto Receive Times:
Midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., 5:00 a.m.
DST Auto Receive Times:
Midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., 5:00 a.m.
Note
•Auto receive is performed only if the watch is in the Timekeeping Mode or World
Time Mode when one of the calibration times is reached. It is not performed if a
calibration time is reached while an alarm is sounding, or while you are configuring
settings (while settings are flashing on the display).
•When a reception time is reached, the second hand stops at 12 o’clock and
reception starts. The second hand remains stopped until reception is complete.
•Auto receive of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can receive the signal easily.
•When auto receive is turned on, the watch receives the calibration signal for two to
seven minutes everyday when the time in the Timekeeping Mode reaches each of
the calibration times. Do not perform any button operation within seven minutes
before or after any one of the calibration times. Doing so can interfere with correct
calibration.
•Remember that reception of the calibration signal depends on the time kept in the
Timekeeping Mode.The receive operation will be performed whenever the display
shows any one of the calibration times, regardless of whether or not the
Timekeeping Mode time actually is the correct time.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, keep the watch in a location where signal strength is strongest.
•Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
•Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal reception.
Receiving indicator
Weak
(Level 1)
Strong
(Level 4)
•The Level 4 receiving indicator indicates that at least one of the auto calibration
signal receive operations was successful. Note, however, that the Level 4 receiving
indicator is cleared from the display at the first auto receive time of the following day.
•The Level 4 receiving indicator appears on the Timekeeping Mode’s Receiving
Indicator and Seconds Count screen only. The Level 4 receiving indicator is not
displayed if signal reception was unsuccessful or after manual adjustment of the
current time setting.
To perform manual receive
1. Place the watch on a stable surface so its 12 o’clock
side is facing towards a window.
2. In the Timekeeping Mode, hold down Dfor about two
seconds until the watch beeps.
3. Release Dand RC flashes to indicate that signal
reception has started.
•When reception starts, the second hand will move at
high speed to the 12 o’clock position where it will stop
until reception is complete.
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Receiving indicator
•Time calibration signal reception normally takes from two to seven minutes, but in
some cases it can take as long as 14 minutes.Take care that you do not perform any
button operations or move the watch during this time.
•After signal reception is complete, the display of the watch changes to the last signal
screen.
Note
•To interrupt reception and return to the Timekeeping Mode, press D.
•If reception is unsuccessful, the message ERR appears on the display for about
one or two minutes. After that, the watch returns to the Timekeeping Mode.
•You can also change from the last signal or ERR screen to the normal timekeeping
screen by pressing D.
To turn auto receive on and off
1. In the Timekeeping Mode, press Dto display the Last
Signal screen.
2. Hold down Auntil the current auto receive setting (ON
or OF) starts to flash. This is the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
•Note that the setting screen will not appear if the
currently selected Home City is one that does not
support time calibration reception.
3. Press Dto toggle auto receive on (ON) and off (OF).
4. Press Ato exit the setting screen.
•The second hand will advance at high speed to the correct position in accordance
with the digital time seconds count, and resume normal movement from there.
•For information about city codes that support signal reception, see “To set your
Home City”
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On/Off status
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the Timekeeping
Mode display.
Probable Cause
•The watch is not in the Timekeeping
Mode.
•Your current Home City is not one of the
following city codes: HNL, ANC, LAX,
DEN, CHI, NYC, HKG, SEL or TYO.
•You changed the time setting manually.
•The watch was not in the Timekeeping
or World Time Mode, or you were
performing some button operation
during auto receive.
•Even if reception is successful, the
Level 4 receiving indicator disappears
each day when the first auto receive
operation of the day is performed.
•Time data (hour, minutes, seconds) only
was received during the last reception.
The Level 4 receiving indicator appears
only when time data and date data
(year, month, day) are both received.
What you should do
•Enter the Timekeeping Mode
and try again.
•Select HNL, ANC, LAX,
DEN, CHI, NYC, HKG, SEL
or TYO as your Home City.
•Perform manual receive or
wait until the next auto
receive is performed.
•Check that the watch is in a
location where it can receive
the signal.
Time setting is
incorrect
following signal
reception.
•If the time is one hour off, the DST
setting may be incorrect.
•The Home City code setting is not
correct for the area where you are using
the watch.
•Change the DST setting to
Auto DST.
•Select the correct Home City
code.
•For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Timekeeping Precautions”.

Operation Guide 4319
3
World Time
The World Time Mode digitally displays the current time
in 30 cities (29 time zones) around the world.
•Pressing Ain the World Time Mode causes the
applicable city code to appear on the digital display for
about two seconds.
•If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
•The watch will perform a signal reception even if it is in
the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
•All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
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City Code
Current time in the
selected city code
To view the time in another city
While in the World Time Mode, press Dto scroll through the city codes (time zones).
•For full information on city codes, see “City Code Table”.
To toggle a city code time between Standard Time and Daylight Saving Time
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.
•Pressing Ain the World Time Mode causes the
applicable city code to appear on the digital display
for about two seconds.
2. Hold down Ato toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator
not displayed).
•Note that you cannot use the World Time Mode to
change the DST setting of the Home City code you
currently have selected in the Timekeeping Mode. See
for information about turning the Home City code DST
setting on and off.
DST indicator
•The DST indicator will appear on the display whenever you display a city code for
which Daylight Saving Time is turned on.
•Note that you cannot switch between Standard Time and Daylight Saving Time
while GMTis selected as the city code.
•Note that the DST/Standard Time setting affects only the currently displayed city
code. Other city codes are not affected.
Alarms
You can set three independent Daily Alarms. When an
alarm is turned on, the alarm tone sounds when the alarm
time is reached. You can also turn on an Hourly Time
Signal that causes the watch to beep twice every hour on
the hour.
•The alarm and Hourly Time Signal operate in
accordance with the current digital time.
•The alarm number (AL1 though AL3) indicates an alarm
screen. SIG appears in place of the alarm number when
the Hourly Time Signal screen is shown.
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm number
Alarm time
(Hour : Minutes)
On/Off status
Alternate at
two-second
interval
To set an alarm time
1. In the Alarm Mode, press Dto select the alarm (AL1,
AL2, AL3) whose time you want to set.
AL1 AL2 AL3 SIG
2. Hold down Auntil the hour setting of the alarm time
starts to flash, which indicates the setting screen.
•This turns on the alarm automatically.
3. Press Cto move the flashing between the hour and minute settings.
4. While a setting is flashing, use D(+) and B(–) to change it.
•When 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).
•If you have 24-hour timekeeping selected in the Timekeeping Mode, the alarm
time is also displayed in 24-hour format.
5. Press Ato exit the setting screen.
On/Off status
Alarm Operation
The alarm sounds in all modes at the preset time for about 10 seconds, or until you
stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press Dto select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to set is selected, press Ato
turn it on (ON) and off (OF).
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
•The display range of the stopwatch is 99 minutes, 59.99
seconds.
•The 1/100-second value appears while the elapsed time
operation is stopped or while a split time is frozen on the
display.
SecondsMinutes
Seconds
1/100
second
More than
one minute
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Split indicator
Split time
(Minutes : Seconds) 1/100 second
Split Time Screen
Elapsed Time Screen
Elapsed time
(Minutes : Seconds)
1/100 second
•The stopwatch continues to run, restarting from zero after it reaches its limit, until
you stop it.
•Exiting the Stopwatch Mode while a split time is frozen on the display clears the split
time and returns to elapsed time measurement.
•The stopwatch measurement operation continues even if you exit the Stopwatch
Mode.
•All of the operations in this section are performed in the Stopwatch Mode, which you
enter by pressing C.
To measure times with the stopwatch
D
Start Stop
Elapsed Time
➤
Re-start Clear
D➤
Stop
D➤D➤A
Split Time
D
Start Split
➤
Split release Clear
A➤
Stop
A➤D➤A
Two Finishes
D
Start Split
➤
Stop Clear
A➤
Split release
D➤A➤A
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. This section
also explains how to set the current date and time manually.
•In the Timekeeping Mode, press Dto display the last signal screen. The last signal
screen shows the date and time of the last successful time calibration signal
reception.
•In the Timekeeping Mode, press Ato cycle through the digital time screens as
shown below.
•All of the operations in this section are performed in the Timekeeping Mode, which
you can enter by pressing C.
You can select either Japanese (kanji) or English for the day of the week indicator.
•For more information, see “To set the current digital time and date manually”.
Day of the Week Indicators
Sunday: SU/ Monday: MO/ Tuesday: TU/ Wednesday: WE/ Thursday: TH/
Friday: FR/ Saturday: SA/
Press A.
▲
Receiving indicator
▲
A
2 seconds
A
Reception Time
Receiving
Indicator and
Seconds Count
▲
Seconds
Hour :
Minutes
PM indicator
Current Time
Screen
2 seconds
2 seconds
Day of week
Day
Date Screen
Last Signal Screen
Reception date
▲
▲
Press D.
Or
Setting the Digital Time and Date Manually
Make sure you select your Home City code before you change the current time and
date settings. World Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, World Time Mode times will not be
correct if you do not select the proper Home City code before setting the time and
date in the Timekeeping Mode.
To set the current digital time and date manually
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
2. Use Cto move the flashing in the sequence shown
below to select other settings.
Seconds Hour
12/24-Hour
Format
Year
DST
DayLanguage
Power
Saving
City Code
Month Minutes
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City code

Operation Guide 4319
4
Do this:
Use D(east) and B(west).
Press D.
Press D.
Press D.
Use D(+) and B(–).
Use D(+) and B(–).
Screen: To do this:
Change the city code
Toggle between Daylight Saving Time
(ON) , Standard Time (OF), or Auto
DST (A)
Toggle between 12-hour ( ) and
24-hour ( ) timekeeping
Reset the seconds to
Change the hour or minutes
Change the year
3. When the setting you want to change is flashing, use Band/or Dto change it as
described below.
•See “City Code Table” for a complete list of available city codes.
•For details about configuring settings for the Power Saving feature, see “Power
Saving Function”.
4. Press Ato exit the setting screen.
•The second hand will advance at high speed to the correct position in accordance
with the digital time seconds count, and resume normal movement from there.
•When you exit the setting screen, the analog hands are adjusted automatically to
match the digital time. See “Analog Timekeeping” for more information.
Note
•Auto DST (A) can be selected only while HKG, SEL, TYO, HNL, ANC, LAX,
DEN, CHI, or NYC is selected as the Home City code. For more information, see
“Daylight Saving Time (DST)” below.
Use D(+) and B(–).
Press D.
Change the month or day
Toggle the day of the week language
between japanese (kanji) and English
Daylight Saving Time (DST)
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.
The time calibration signals transmitted from Fort Collins (United States) and from
Fukushima and Fukuoka/Saga (Japan) include both standard time and summer time
(DST) data. When the Auto DST setting is turned on, the watch switches between
Standard Time and DST (summer time) automatically in accordance with the received
time signal.
•Auto DST (A) can be selected only while HKG, SEL, TYO, HNL, ANC, LAX,
DEN, CHI, or NYC is selected as the Home City code.
•The default DST setting is Auto DST (A) whenever you select HKG, SEL, TYO,
HNL, ANC, LAX, DEN, CHI, or NYC as your Home City code.
•If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight Saving Time (summer
time) manually.
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cto display the DST setting screen.
3. Use Dto cycle through the DST settings in the
sequence shown below.
Auto DST ( A ) DST off ( OF ) DST on ( ON )
4. When the setting you want is selected, press Ato exit the setting screen.
•The DST indicator appears on the display to indicate that Daylight Saving Time is
turned on.
DST indicator
Analog Timekeeping
The analog time of this watch is synchronized with the digital time. The analog time
setting is adjusted automatically whenever you change the digital time.
Note
•The hands for the analog timepiece move to adjust to a new setting whenever any of
the following occurs.
When you change the digital time setting manually
When the digital time setting is changed by time calibration signal reception
When you change the Home City code and/or DST setting
•If the analog time does not match the digital time for any reason, use the procedure
described under “To adjust the analog time” to match the analog setting to the digital
setting.
•Whenever you need to adjust both the digital and the analog time settings manually,
make sure you adjust the digital setting first.
•Depending on how much the hands have to move in order to adjust to the digital
time, it may take some time before they stop moving.
To adjust the analog time
1. In the Timekeeping Mode, press Cfive times to enter
the Hand Setting Mode.
2. Hold down Auntil starts to flash, which
indicates the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
3. If the second hand is not pointing precisely at 12 o’clock
at this time, use Dto adjust its position.
•Each press of Dcauses the second hand to advance
by one second.
4. Press C. This will cause the time on the digital display to flash, which indicates that
adjustment of hour and minute hands is selected.
When you want to do this:
Move the hand setting
forward 10 seconds
Perform this button operation:
•Press D.
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5. Use Dand Bto adjust the analog setting as described below.
Move the hand setting back
10 seconds
Move the hand setting a short
way forward at high speed
Move the hand setting a
short way back at high speed
Move the hand setting a long
way forward at high speed
•Press B.
•Hold down D.
•Release Dwhen the hands reach the setting
you want.
•Hold down B.
•Release Bwhen the hands reach the setting
you want.
•While holding down Dto move the hands at
high-speed, press Bto lock the high-speed
hand movement.
•To stop the hand movement, press any
button.
•Hand movement stops automatically if the
hour hand makes one full (12-hour) revolution.
Move the hand setting a long
way back at high speed
•While holding down Bto move the hands at
high-speed, press Dto lock the high-speed
hand movement.
•To stop the hand movement, press any
button.
•Hand movement stops automatically if the hour
hand makes one full (12-hour) revolution.
6. Press Ato exit the setting screen.
•The minute hand will be adjusted slightly to match the seconds when you exit the
setting screen.
•To return to the Timekeeping Mode, press C.
Power Supply
This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its face
is pointing at a light source.
•The illustration shows how to position
a watch with a resin band.
•Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
•You should try to keep the watch
outside of your sleeve as much as
possible. Charging is reduced
significantly if the face is only partially
covered.
Solar cell
Important!
•Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Make sure that the watch is exposed to bright light whenever
possible.
•This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
•Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.
•The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 5 and when you have the battery replaced.
•Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
To check the current battery level
In the Timekeeping Mode, press Cto display the battery level indicator.
Battery level indicator
•The battery level indicator shows you the current power level of the rechargeable
battery.
Function Status
All functions enabled.
All functions enabled.
Alarm, hourly time signal, illumination
and time calibration signal reception
disabled.
All functions disabled.
All functions, including timekeeping,
disabled and initialized.
Level
1
2
3
4
5
Battery Level Indicator
(Charge Soon Alert)
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(Charge Soon Alert)
•The indicator at Level 3 and the flashing charge indicator (C) at Level 4 tell you
that battery power is very low, and that exposure to bright light for charging is
required as soon as possible.

Operation Guide 4319
5
•At Level 5, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 4
(indicated by the flashing charge indicator (C)) from Level 5. You will not be able to
configure any of the other settings until the battery reaches Level 2 (no charge
indicator) after dropping to Level 5.
•Leaving the watch in direct sunlight or some other very strong light source can
cause the battery level indicator to show a reading that is momentarily higher than
the actual battery level. The correct battery level indicator should appear after a few
minutes.
•If you use the illumination or alarms a number of times during a short period, the
hands of the watch will stop. Battery Level Indicator will show Rat this time. Also,
the following operations will become disabled until battery power recovers.
Illumination
Beeper tone
Time calibration signal reception
After some time, battery power will recover and the above functions will be enabled
again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Approximate Exposure Time
8 minutes
27 minutes
43 minutes
8 hours
•For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifications.
•Stable operation is promoted by frequent exposure to light.
Charging Guide
After a full charge, timekeeping remains enabled for up to about 6 months.
•The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
•The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
10 hours
38 hours
61 hours
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a Window
(10,000 lux)
Daylight Through a Window
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
(500 lux)
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours
6 hours
9 hours
100 hours
36 hours
140 hours
220 hours
▲ ▲ ▲ ▲ ▲
– – –
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.
Power Saving Function
The Power Saving function enters a sleep state automatically whenever the watch is
left in an area where it is dark for a certain period. The table below shows how watch
functions are affected by the Power Saving function.
Approximate Period
in sleep state
3 to 4 days
8 days or more
Functions
•LCD off
•Alarm, hourly time signal, analog timekeeping and auto
receive enabled
•LCD off, alarm and hourly time signal disabled
•Analog timekeeping stopped at 12 o’clock
•Auto receive disabled
•The sleep state is indicated by a blank screen.
•Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
To recover from the sleep state
Perform any one of the following operations.
•Move the watch to a well-lit area.
•Press any button.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cten times until the Power Saving on/off screen
appears.
3. Press Dto toggle Power Saving on (ON) and off
(OF).
4. Press Ato exit the setting screen.
•The Power Saving on indicator is on the display in all
modes while Power Saving is turned on.
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Power saving
on indicator
Auto Return Features
•If you leave the watch in the Alarm Mode or Hand Setting Mode, or with the battery
level indicator displayed for two or three minutes without performing any operation, it
returns to the Timekeeping Mode automatically.
•If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
The Band Dbuttons 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.
Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
Radio-controlled Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time being set.
•The time calibration signal bounces off the ionosphere. Because of this, such factors
as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
•Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
•The current time setting in accordance with the time calibration signal takes priority
over any time settings you make manually.
•The watch is designed to update the date and day of the week for the period
January 1, 2000 to December 31, 2099 automatically. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.
•This watch can receive signals that differentiate between leap years and non-leap
years.
•Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.
•Normally, the signal reception date shown by the last signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the last signal screen shows the date as kept in the Timekeeping Mode at
the time of signal reception.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time with the precision noted in “Specifications”.
•If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your Home City code, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.
Setting
City code
DST (summer time)
Auto receive
Language
Initial Factory Default
TYO (Tokyo)
(Auto switching)
(Auto receive)
Japanese
Transmitters
This watch is designed to pick up the time calibration signals transmitted from Fort
Collins, Colorado in the United States, and from Fukushima and Fukuoka/Saga in
Japan.
•The following explains how the watch determines which transmitter it should check
first.
HKG, SEL,TYO City Codes
In this case:
The first signal auto search operation
after factory default settings are in effect,
or after the city code has been changed
Any case other than the above.
The watch does this:
1. Checks the Fukushima signal first.
2. If the Fukushima signal cannot be
received, checks the Fukuoka/Saga
signal.
1. Checks the last successfully received
signal first.
2. If the last successfully received signal
cannot be received, checks the other
signal.
When HNL, ANC, LAX, DEN, CHI, or NYC is selected as the Home City code,
the watch will receive the signal transmitted from Fort Collins, Colorado.
Timekeeping
•Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes 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 day of the week is displayed in accordance with the date (year, month, and day)
settings automatically.
•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 battery replaced.
•The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
•GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* UTC is the world-wide scientific standard of timekeeping. It is based upon carefully
maintained atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s rotation.
The reference point for UTC is Greenwich, England.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.
•With the 12-hour format, the P(PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears 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.

Operation Guide 4319
6
Illumination Precautions
An LED (light-emitting diode) and a light guide panel illuminate the face of the watch
for easy reading in the dark. In any mode, press Bto illuminate the face of the watch
for about one second.
•The illumination provided by the light may be difficult to see when viewed under
direct sunlight.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination shortens the battery operating time.
Specifications
Accuracy at normal temperature: ± 20 seconds a month (with no signal calibration)
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), day, day of the week
Time system: Switchable between 12-hour and 24-hour formats
Calendar system: Full Auto-calendar pre-programmed from the year
2000 to 2099
Other: Home City code (can be assigned one of 30 city codes); Daylight Saving
Time (summer time)/Standard Time
Time Calibration Signal Reception: Auto receive up to six times a day (remaining
auto receives cancelled as soon as one is successful); manual receive;
last signal screen
Receivable Time Calibration Signals: Fukushima, Japan (Call Sign: JJY,
Frequency: 40.0 kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency:
60.0 kHz); Fort Collins, Colorado, the United States (Call Sign: WWVB,
Frequency: 60.0 kHz)
Analog Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds
World Time: 30 cities (29 time zones)
Other: Standard Time/Daylight Saving Time (summer time)
Alarms: Three one-time daily alarms (AL1, AL2, AL3); Hourly Time Signal (SIG)
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 99' 59.99''
Measuring modes: Elapsed time, split time, two finishes
Illumination: LED (light-emitting diode)
Other: Battery level indicator; Power Saving
Power Supply: Solar cell and a rechargeable battery
Approximate Battery Operating Time
6 months (from full charge to Level 5 when the watch is not exposed to light)
under the following conditions:
•Display on 18 hours per day, sleep state 6 hours per day
•1 illumination operation (1.5 seconds) per day
•10 seconds of alarm operation per day
•6 minutes of signal reception per day
Frequent use of illumination can shorten battery operating time.
Honolulu
Anchorage
Los Angeles
Denver
Chicago
New York
Caracas
Rio De Janeiro
London
Paris
Berlin
Athens
Cairo
Jerusalem
City City UTC Offset/
Code GMT Differential
City Code Table
– – –
HNL
ANC
LAX
DEN
CHI
NYC
CCS*
RIO
– – –
– – –
GMT
LON
PA R
BER
AT H
CAI
JRS
–11.0
–10.0
–09.0
–08.0
–07.0
–06.0
–05.0
–04.0
–03.0
–02.0
–01.0
+00.0
+01.0
+02.0
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Hong Kong
Seoul
Tokyo
Adelaide
Sydney
Noumea
Wellington
+03.0
+03.5
+04.0
+04.5
+05.0
+05.5
+06.0
+06.5
+07.0
+08.0
+09.0
+09.5
+10.0
+11.0
+12.0
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
SEL
TYO
ADL
SYD
NOU
WLG
•Based on data as of December 2008.
•UTC offsets and the use of summer time are subject to change in the country where
they are used.
* In December 2007, the UTC offset for Caracas, Venezuela (CCS) was changed from
– 4.0 to – 4.5. However, this watch still uses the old UTC offset of – 4.0 when the
Caracas (CCS) city code is selected.