MO0907-EA
Operation Guide 4739
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully.
Keep the watch exposed to bright light
Bright Light
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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, be sure to keep it
exposed to light as much as possible.
Battery charges in the light. Battery discharges in the dark.
Solar cell
(Converts light to
electrical power.)
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch
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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.
Bright Light
Electrical
energy
All
LEVEL 1
functions
LEVEL 2
enabled
LEVEL 3
Charge
LEVEL 4
Rechargeable battery
Dis-
charge
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Some or all
functions
disabled
• The actual level at which some functions are disabled depends on the watch model.
• Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fluorescent lighting
• 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
• 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.
• Most of the display examples in this manual show only
the digital display, without the analog hands.
• 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.
General Guide
• 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.
Timekeeping Mode
Battery Level Indicator
Press C.
▲
World Time Mode
▲
▲
Radio-controlled Atomic Timekeeping
Hour hand
Minute hand
Month Day
• When using the watch outside the areas covered by the time signal transmitters, you
will have to adjust the current time setting manually as required. See “Timekeeping”
for more information about manual time settings.
• The U.S. time calibration signal can be picked up by the watch while in North
America. The term “North America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
• The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is automatically adjusted whenever you change the digital
setting. See “Analog Timekeeping” for more information.
To specify your Home City
City code
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German/U.K. Signal Japan Signal U.S. Signal
City
City
Code
Name
LIS
Lisbon
LON
London
MAD
Madrid
PAR
Pari s
ROM
Rome
BER
Berlin
STO
Stockholm
3. Press A to exit the setting screen.
This watch receives a time calibration signal and updates
its time setting accordingly.
• Supported time calibration signals: Germany
(Mainflingen), England (Anthorn), United States (Fort
Collins), Japan.
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 specify your Home City (the city where you
normally will use the watch). For more information, see
“To specify your Home City”.
1. In the Timekeeping Mode, hold down A the city code
starts to flash. This is the setting screen.
2. Press D(east) to select the city code you want to use
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as your Home City.
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• Time calibration signal reception is supported when
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City
Code
ATH
MOW
any one of the city codes shown in the table below is
selected as your Home City.
City
Name
Athens
Moscow
City
Code
HKG
BJS
TPE
SEL
TYO
City
Name
Hong Kong
Beijing
Taipei
Seoul
Tokyo
City
Code
HNL
ANC
YVR
LAX
YEA
DEN
MEX
City
Name
Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
Mexico City
City
Code
YWG
CHI
MIA
YTO
NYC
YHZ
YYT
City
Name
Winnipeg
Chicago
Miami
Toronto
New York
Halifax
St. Johns
Stopwatch ModeCountdown Timer Mode
▲
Hand Setting Mode
▲
Important!
• 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
operation (in the middle of the night). You can also perform manual receive or you
can set the time manually.
• 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 “Home
City Codes and Transmitters”.
• Under factory default settings, auto receive is turned off for all of the following city
codes: MOW (Moscow), HKG (Hong Kong), BJS (Beijing), HNL (Honolulu), and
ANC (Anchorage). For details about turning on auto receive for these city codes, see
“To turn auto receive on and off”.
• You can disable time signal reception, if you want. See “To turn auto receive on and
off” for more information.
• See the maps under “Approximate Reception Ranges” for information about the
reception ranges of the watch.
• If you are in an area that does not use Daylight Saving Time (summertime), turn off
the DST setting.
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 a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.
Important!
• The antenna of this watch is located on its 12 o’clock side. Position the watch with
12 o’clock facing towards a window as shown in the nearby illustration. Make sure
there are no metal objects nearby.
• Make sure the watch is facing the right way.
▲
Alarm Mode
▲
12 o’clock
or
1
Operation Guide 4739
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
• 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.
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below. If you use the watch in Japan or Europe
(each of which has two different transmitter locations), it will try to receive the time
calibration signal from one of the transmitters in your current location. If it cannot
receive the signal, it will then try to receive the time calibration signal from the other
transmitter.
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near hightension
power lines
Among or
behind
mountains
Home City Codes and Transmitters
Home City Code
LIS, LON,
MAD, PAR, ROM, BER,
STO, ATH, MOW*
HKG*, BJS*, TPE,
SEL, TYO
HNL*, ANC*, YVR,
LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO,
NYC, YHZ, YYT
* The areas covered by the MOW, HKG, BJS, HNL, and ANC city codes are quite
far from the time calibration signal transmitters, and so certain conditions may
cause problems with signal reception.
Transmitter
Anthorn (England)
Mainflingen (Germany)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Frequency
60.0 kHz
77.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Approximate Reception Ranges
UK and German Signals
Anthorn
500 kilometers
1,500 kilometers
The Anthorn signal
is receivable within this area
Signals are receivable in the Taiwan area
when reception conditions are good.
• 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.
Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310
miles)
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
• 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
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 reception schedule (calibration times) depends on your currently
selected Home City, and whether standard time or Daylight Saving Time is selected
for your Home City.
Your Home City Auto Receive Start Times
LIS, LON
MAD, PAR, ROM,
BER, STO
ATH
MOW
HKG, BJS, TPE,
SEL, TYO
HNL, ANC, YVR,
LAX, YEA, DEN,
MEX, YWG, CHI,
MIA, YTO, NYC,
YHZ, YYT
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Daylight
Saving Time
Standard Time
Standard Time
Daylight
Saving Time
Mainflingen
Japanese Signals
500 kilometers
Fukuoka/Saga
1:00 am
2:00 am
2:00 am
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
Midnight
Midnight
North American Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Fukushima
1,000 kilometers
123456
2:00 am
3:00 am
4:00 am
5:00 am
Midnight
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight
next day
1:00 am
1:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
2:00 am
2:00 am
5:00 am
5:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
3:00 am
3:00 am
Midnight
next day
Midnight
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
2:00 am
next day
3:00 am
next day
4:00 am
4:00 am
next day
1:00 am
next day
1:00 am
next day
2:00 am
next day
2:00 am
next day
3:00 am
next day
3:00 am
next day
4:00 am
next day
5:00 am
5:00 am
Note
• When a calibration time is reached, the watch will receive the calibration signal only
if it is in either the Timekeeping Mode or World Time Mode. Reception is not
performed if a calibration time is reached while you are configuring settings.
• 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.
• The watch receives the calibration signal for two to 14 minutes everyday when the
time in the Timekeeping Mode reaches each of the calibration times. Avoid
performing any button operation within 14 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 current time 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 displayed
time actually is the correct time.
• Calibration signal reception is disabled while a countdown timer operation is
in progress.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Receiving indicator
Weak
(Level 0)
• Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
• 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.
To perform manual receive
Receiving
Receiving indicator
Receive successful
Receive failed
To turn auto receive on and off
On/Off status
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To check the latest signal reception results
Receive date
Receive time
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Cannot perform
manual receive.
Time setting is
incorrect
following signal
reception.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
1. Enter the Timekeeping Mode.
2. Place the watch on a stable surface so its 12 o’clock
side is facing towards a window.
3. Hold down D for about two seconds until the receiving
indicator appears on the display.
• Time calibration signal reception takes from two to 14
minutes. Take care that you do not perform any button
operations or move the watch during this time.
• If the receive operation is successful, the reception date
and time appear on the display, along with the GET
indicator.
The watch will enter the Timekeeping Mode if you press
D or if you do not perform any button operation for
about one or two minutes.
Receive date
Receive time
• If the current reception fails, the display shows the ERR
indicator.
The watch will enter the Timekeeping Mode without
changing the time setting if you press D or if you do not
perform any button operation for about one or two
minutes.
1. In the Timekeeping Mode, press D to display the Last
Signal screen.
2. Hold down A until the current auto receive setting (ON
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•
• Your current Home City is not one of the
• If the time is one hour off, the DST
• The Home City code setting is not
or OFF) start to flash. This is the setting screen.
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• Note that the setting screen will not appear if the
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currently selected Home City is one that does not
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The watch is not in the Timekeeping Mode.
following:
LIS, LON, MAD, PAR, ROM, BER, STO,
ATH, MOW, HKG, BJS, TPE, SEL, TYO,
HNL, ANC, YVR, LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO, NYC, YHZ, or
YYT
setting may be incorrect.
correct for the area where you are using
the watch.
support time calibration reception.
3. Press D to toggle auto receive on (ON) and off (OFF).
4. Press A to exit the setting screen.
• For information about city codes that support signal
receive, see “To specify your Home City”.
In the Timekeeping Mode, press D to display the Last
Signal screen.
• When receive is successful, the display shows the time
and date that receive was successful. - - : - - indicates
that none of the reception operations were successful.
• To return to the Timekeeping Mode, press D.
Probable Cause
• Enter the Timekeeping Mode
• Select LIS, LON, MAD, PAR,
• Change the DST setting to
• Select the correct Home City
and try again.
ROM, BER, STO, ATH, MOW,
HKG, BJS, TPE, SEL, TYO,
HNL, ANC, YVR, LAX, YEA,
DEN, MEX, YWG, CHI, MIA,
YTO, NYC, YHZ, or YYT as
your Home City.
Auto DST.
code.
Strong
(Level 3)
What you should do
2
Operation Guide 4739
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World Time
City code
Current time in
selected city
To view the time in another city
While in the World Time Mode, press D to scroll through the city codes (time zones)
to the east.
• For full information on city codes, see the “City Code Table”.
To toggle a city code time between Standard Time and Daylight Saving Time
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 the DST/Standard Time setting affects only the currently displayed city
code. Other city codes are not affected.
The World Time Mode digitally displays the current time in
48 cities (29 time zones) around the world.
• If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
• Pressing A in the World Time Mode displays the city
code of the currently selected city for about two
seconds.
• 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.
1. In the World Time Mode, use D to display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down A to 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
“To change the Daylight Saving Time (summer time)
setting” for information about turning the Home City
code DST setting on and off.
Countdown Timer
You can set the countdown timer within a range of one to
60 minutes. An alarm sounds when the countdown
reaches zero.
• Calibration signal reception (both auto and manual) is
disabled while a countdown timer operation is in
progress.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
Minutes
To set the countdown start time
1. While the countdown start time is on the display in the Countdown Timer Mode,
2. While a setting is flashing, use D (+) and B (–) to change it.
3. Press A to exit the setting screen.
To use the countdown timer
Press D while in the Countdown Timer Mode to start the countdown timer.
• When the end of the countdown is reached, the alarm sounds for 10 seconds or until
• Press D while a countdown operation is in progress to pause it. Press D again to
• To completely stop a countdown operation, first pause it (by pressing D), and then
Seconds
hold down A until the current 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” to display it.
you stop it by pressing any button. The countdown time is automatically reset to its
starting value after the alarm stops.
resume the countdown.
press A. This returns the countdown time to its starting value.
C.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 59 minutes, 59.99
seconds.
• 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.
Minutes
Seconds
To measure times with the stopwatch
Elapsed Time
D
Start Stop
• When elapsed time measurement is paused, the display alternates between a
minute/second screen and a 1/100 second screen at two-second intervals.
Split Time
D
Start Split
• The split time screen cycles alternately through the split (SPL) indicator , a minute/
second screen, and a 1/100 second screen.
Two Finishes
D
Start Split
• 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.
D
➤
A ➤
➤
A
➤
First runner finishes.
Display time of first
runner.
D
➤
Re-start Clear
A
Split release
D
➤
Stop
Second runner
finishes.
D ➤
➤
Stop
D ➤
➤
Stop
A
➤
Split release
Display time of
second runner.
A
A
Clear
A
➤
Clear
Alarm
On/Off status
2-second
intervals
Alarm Screen
▲
Press D.
▲
Hourly Time Signal Screen
To set the alarm time
Alarm time
(Hour : Minutes)
Alarm Operation
The alarm sounds at the preset time for about 10 seconds, regardless of the mode the
watch is in.
• To stop the alarm tone after it starts to sound, press any button.
• Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode digital time.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn the alarm and the Hourly Time Signal on and off
On/Off status
When the alarm is turned on, the alarm sounds when the
alarm time is reached. You can also turn on an Hourly
Time Signal, which will cause the watch to beep twice
every hour on the hour.
• When the alarm is turned on, the alarm screen
alternates between ALON (alarm on) and the current
alarm time (hour and minutes). When the alarm is off,
ALOF (alarm off) remains on the alarm screen.
• Pressing D in the Alarm Mode toggles between the
alarm screen and Hourly Time Signal screen.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
1. In the Alarm Mode, press D to display the alarm
screen.
2. Hold down A until the hour setting of the alarm time
starts to flash, which indicates the setting screen.
• This operation automatically turns on the alarm.
3. Press C to 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. (P indicator).
5. Press A to exit the setting screen.
1. In the Alarm Mode, press D to select the alarm or the
Hourly Time Signal screen.
2. Press A to toggle the currently selected function on
(ON displayed) and off (OF displayed).
Illumination
An LED (light-emitting diode) and light guide panel
illuminate the face of the watch for easy reading in the
dark.
• See “Illumination Precautions” for other important
information.
To turn on illumination
In any mode (except when a setting is on the display),
press B to illuminate the face of the watch for about one
second.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. This section
also explains how to manually set the current date and time.
• When setting the time, you can also configure settings for the 12/24-hour format.
• Each press of A cycles the digital display in the sequence shown below.
Month
Press A.
Second
▲
Day
▲
• Pressing D in the Timekeeping Mode will display the Last Signal screen.
• All of the operations in this section are performed in the Timekeeping Mode, which
you can enter by pressing C.
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.
Hour : Minutes
Press D.
▲
PM indicator
A
▲
A
Last Signal Screen
A
Day of week
▲
▲
3
Operation Guide 4739
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To set the current digital time and date manually
City code
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City Code
Power
Saving
3. When the setting you want to change is flashing, use D to change it as described
below.
Screen: To do this:
• See “City Code Table” for a complete list of available city codes.
• Auto DST (AUTO) can be selected only while LIS, LON, MAD, PA R, ROM, BER,
STO, ATH, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR, LAX, YEA, DEN,
MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home City code.
For more information, see “Daylight Saving Time (DST)” below.
• For information about settings other than the time and date, see the following.
Power Saving: Power Saving Function
4. Press A to exit the setting screen.
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 Mainflingen (Germany), Anthorn
(England), or Fort Collins (the United States) include both Standard Time and 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 signals.
• The time calibration signals transmitted from Fukushima and Fukuoka/Saga (Japan)
do not include summer time data.
• The default DST setting is Auto DST (AUTO) whenever you select LIS, LON, MAD,
PAR , ROM, BER, STO, AT H, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR,
LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT 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 A until the city code starts to flash, which
indicates the setting screen.
2. Press C once and the DST setting screen appears.
3. Use D to cycle through the DST settings in the sequence shown below.
Auto DST (AUTO) DST off (OFF) DST on (ON)
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press C to move the flashing in the sequence shown
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below to select other settings.
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DST
Day
Change the city code
Cycle between Daylight Saving Time
(ON), Standard Time (OFF), and
Auto DST (AUTO)
Toggle between 12-hour (12H) and
24-hour (24H) timekeeping
Reset the seconds to 00
Change the hour or minutes
Change the year
Change the month or day
Toggle Power Saving on (PSON)
and off (PSOF)
12/24-Hour
Forma t
Month
Do this:
Press D (east).
Press D.
Press D.
Press D.
Press D (+).
Press D.
Seconds
Year
Hour
Minutes
To adjust the analog time
When you want to do this:
Move the hand setting
forward 20 seconds
Move the hand setting a short
way forward at high speed
Move the hand setting a
long way forward at high
speed
4. Press A to 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.
1. In the Timekeeping Mode, press C six times to enter
the Hand Setting Mode.
2. Hold down A until the current digital time starts to
flash, which indicates the setting screen.
3. Use D and B to adjust the analog setting as
described below.
Perform this button operation:
• Press D.
• Hold down D.
• Release D when the hands reach the setting
you want.
• While holding down D to move the hands at
high speed, press B to 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.
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.
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 normally 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 C to display the battery level indicator.
Battery level indicator
Solar cell
4. When the setting you want is selected, press A to exit the setting screen.
• The DST indicator appears on the display to indicate that Daylight Saving Time is
turned on.
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.
•
The battery level indicator shows you the current power level of the rechargeable battery.
Level
Battery Level Indicator
1
2
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3
4
5
• The flashing Low indicator (L) 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.
• 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 3 (no charge
indicator) after dropping to Level 5.
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(Charge Soon Alert)
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(Charge Soon Alert)
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.
Function Status
4
Operation Guide 4739
• 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.
• The watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery drops to Level 5. With this Home City code setting, the watch is
configured to receive the time calibration signals of Japan. If you are using the watch
in North America or Europe, you will need to change the Home City code setting to
match your location whenever the battery drops to Level 5.
• 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 R at 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
Charging Guide
After a full charge, timekeeping remains enabled for up to about 12 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.
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)
• 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.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
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)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
▲
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
▲
2 hours
7 hours
13 hours
163 hours
▲
32 hours
158 hours
321 hours
▲
9 hours
44 hours
89 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
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Power saving indicator
Elapsed Time
in Dark
60 to 70 minutes
6 or 7 days
• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
• The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch
is already in the sleep state when 6:00 AM arrives, however, it will remain in the
sleep state.
When turned on, 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.
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Display
Blank, with Power Saving
indicator (PS) flashing
Blank, with Power Saving
indicator (PS) not flashing
All functions enabled, except
for the display
•Beeper tone, illumination, and
display disabled
•Analog timekeeping stopped
at 12 o’clock
•Auto receive disabled
Operation
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
On/Off status
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Auto Return Features
• If you leave the watch in the Alarm or Hand Setting Mode, or with the battery level
indicator displayed for two or three minutes without performing any operation, it
automatically returns to the Timekeeping Mode.
• If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
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.
Initial Screens
When you enter the World Time Mode, the data you were viewing when you last exited
the mode appears first.
Radio-controlled Atomic 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 automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2099. 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 current city code, DST (summer
time), and auto receive settings.
Timekeeping
• Resetting the seconds to 00
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00
• The day of the week is automatically displayed in accordance with the date (year,
• 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
• The current time for all city codes in the Timekeeping Mode and World Time Mode is
• The times for the Timekeeping Mode and all the city codes of the World Time Mode
• The UTC differential is a value that indicates the time difference between a
• The letters “UTC” is the abbreviation for “Universal Time Coordinated”, which is the
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 PM indicator (P) appears on the display for times in the
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
Illumination Precautions
• Illumination may be hard to see when viewed under direct sunlight.
• Illumination automatically turns off whenever an alarm sounds.
• Frequent use of illumination runs down the battery.
without changing the minutes.
month, and day) settings.
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 or when battery power drops to
Level 5.
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
are calculated in accordance with each city’s UTC differential.
reference point in Greenwich, England and the time zone where a city is located.
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.
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
any indicator.
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press C nine times until the Power Saving on/off
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screen appears.
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3. Press D to toggle Power Saving on (PSON) and off
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(PSOF).
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4. Press A to exit the setting screen.
• The Power Saving indicator (PS) is on the display in all
modes while Power Saving is turned on.
while the current count is in the range of 30 to 59
5
Operation Guide 4739
Specifications
Accuracy at normal temperature: ± 30 seconds a month (with no signal calibration)
Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, 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 48 city codes); Daylight
Time Calibration Signal Reception: Auto receive up to six times a day (remaining
Analog Timekeeping: Hour, minutes (hand moves every 20 seconds)
World Time: 48 cities (29 time zones)
Alarms: Daily alarm; Hourly Time Signal
Countdown Timer:
Stopwatch
Illumination: LED (light-emitting diode)
Other: Battery level indicator; Power Saving
Power Supply: Solar cell and a rechargeable battery
Approximate Battery Operating Time
City Code Table
City
Code
PPG
HNL
ANC
YVR
YEA
DEN
MEX
YWG
YTO
NYC
CCS*
YHZ
YYT
LON
MAD
ROM
BER
STO
MOW
THR
DXB
DEL
DAC
RGN
BKK
HKG
TYO
GUM
SYD
NOU
WLG
• Based on data as of December 2008.
• The rules governing global times (GMT differential and UTC offset) and summer time
are determined by each individual country.
* In December 2007, Venezuela changed its offset from –4.0 to –4.5. Note however, that
this watch displays an offset of –4.0 (the old offset) for the CCS (Caracas, Venezuela)
city code.
Saving Time (summer time)/Standard Time
auto receives cancelled as soon as one is successful); Manual Receive;
Last Signal screen
Receivable Time Calibration Signals: Mainflingen, Germany (Call Sign: DCF77,
Frequency: 77.5 kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0
kHz); Fort Collins, Colorado, the United States (Call Sign: WWVB,
Frequency: 60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0
kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz)
Other: Standard Time/Daylight Saving Time (summer time)
Measuring unit: 1 second
Input range: 1 to 60 minutes (1-minute increments)
Measuring unit: 1/100 second
Measuring capacity: 59' 59.99''
Measuring modes: Elapsed time, split time, two finishes
12 months (from full charge to Level 4 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
• 10 minutes of signal reception per day
Frequent use of illumination can shorten battery operating time.
UTC Offset/
GMT Differential
–11
–10
–9
–8
–7
–6
–5
–4
–3.5
–3
–1
0
+1
+2
+3
+3.5
+4
+4.5
+5
+5.5
+6
+6.5
+7
+8
+9
+9.5
+10
+11
+12
LAX
CHI
MIA
RIO
RAI
LIS
PAR
ATH
CAI
JRS
JED
KBL
KHI
BJS
TPE
SEL
ADL
City
Pago Pago
Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
Mexico City
Winnipeg
Chicago
Miami
Toronto
New York
Caracas
Halifax
St. Johns
Rio De Janeiro
Praia
Lisbon
London
Madrid
Paris
Rome
Berlin
Stockholm
Athens
Cairo
Jerusalem
Moscow
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Hong Kong
Beijing
Taipei
Seoul
Tokyo
Adelaide
Guam
Sydney
Noumea
Wellington
6
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