MO0905-A
Operation Guide 5007
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.
• 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.
• This watch does not have a city code that corresponds to the UTC offset of
–3.5 hours. Because of this, the radio-controlled atomic timekeeping function
will not display the correct time for Newfoundland, Canada.
If the analog hands aren’t moving...
If the analog hands aren’t moving, it means that the power saving mode has stopped
them to save battery power.
• See “Power Saving” for more information.
• The hands also stop when the watch’s battery runs down.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
Bright light
l
l
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.
l
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.
• When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.
Solar cell
About This Manual
• You should try to keep the watch outside of your sleeve
as much as possible. Even if the face of the watch is
blocked only partially from light, charging will be reduced
significantly.
• Button operations are indicated using the letters shown
Stopwatch
in the illustration.
second hand
Hour hand
• Each section of this manual provides you with the
information you need in order to perform operations in
each mode. Further details and technical information
can be found in the “Reference” section.
• 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.
24-hour
hand
Battery charges in the light.
Solar cell
Battery discharges in the dark.
Minute
hand
Date
(Converts light to
electrical power.)
Upper right
dial hand
Bright light
Second hand
Electrical
energy
All
functions
enabled.
LEVEL 1
LEVEL 2
LEVEL 1
LEVEL 2
Dis-
charge
Some
functions
disabled.
Charge
Rechargeable battery
Alarm Mode
Timekeeping Mode
General Guide
Press D.
(When the stopwatch is
reset to all zeros.)
Manual Receive
Receive Status Check
Press C.
Hold down A for
about two seconds.
Stopwatch Mode
L
Press C.
Press C.
L
Press A.
Press any button.
World Time Mode
Countdown Timer Mode
Transmitter Change
Time/Date Adjustment
Timekeeping Mode
Press B or D.
Hold down A
for about five seconds.
Press C.
Press A.
• Whenever you enter the Timekeeping, Countdown Timer, World Time, or Alarm
Mode, the hands of the watch move to the applicable time for that mode. Even if the
hands are moving, you can press C to move to another mode (except for the
Stopwatch Mode), if you want. Note, however, that all other buttons are disabled
while the hands are moving.
Radio-controlled Atomic Timekeeping
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 (Fukushima or Fukuoka/Saga)
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
• For full information on city codes, see the “City Code Table”.
German/U.K. Signal
City
Code
Japan Signal
City
Code
U.S. Signal
City
Code
City
Code
DEN Denver
CHI Chicago
NYC New York
City Name
City Name
City Name
City Name
LON London
PAR Paris
ATH Athens
HKG Hong Kong
TYO Tokyo
HNL Honolulu
ANC Anchorage
LAX Los Angeles
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration
signal.You also can perform a manual procedure to set the time and date, when
necessary.
• In addition to the above, you also can select city codes that are outside the ranges
of the time calibration signal transmitters supported by this watch.
• Note that this watch does not have a city code that corresponds to Newfoundland.
3. After the Home City setting is the way you want, press A to return to the
Timekeeping Mode.
• Normally, your watch should show the correct time as soon as you specify your
Home City code. If it does not, it should adjust automatically after the next auto
receive operation.You also can perform manual receive or you can set the time
manually.
• Even if the time calibration signal is received correctly, there are some times when
the analog hands may not indicate the correct time. If this happens, use the
procedures under “Adjusting the Home Positions” to check the home positions of the
hands, and make adjustments as required.
• The first thing you should do after purchasing this watch is to specify your
Home City, which is the city where you normally will use the watch. For more
information, see “To specify your Home City”.
• 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.
To specify your Home City
1. In the Timekeeping Mode, hold down A for about five
seconds until the watch beeps twice.
Daylight SavingTime (DST)
• The stopwatch second hand will move to the city code
of the currently selected Home City. This is the city
code setting mode.
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 second hand will stop at “0”.*
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.
• Though the time calibration signal transmitted by the Fukushima and Fukuoka/Saga,
Japan transmitters include summer time data, summer time currently is not
implemented in Japan (as of 2007).
• The default DST setting is Auto DST (AT/AUTO) whenever you select LON, PAR,
ATH, ANC, LAX, DEN, CHI, NYC, or TYO as your Home City code.
• If you experience problems receiving the time calibration signal in your area, it
probably is best to switch between Standard Time and Daylight Saving Time
(summer time) manually. For more information, see “To set the time and date
manually”.
* Some models show “60” instead of “0”.
2. Use D to move the stopwatch second hand to the city
code you want to use as your Home City.
• Each press of D causes the stopwatch second hand
to advance clockwise to the next city code.
• Time calibration signal reception is supported when
any one of the city codes shown in the table below is
selected as your Home City.
City code
Stopwatch
second hand
1
Operation Guide 5007
Stopwatch
The stopwatch lets you measure elapsed time.
Countdown Timer Examples
Countdown start time: 10 minutes
Stopwatch second hand
• When you enter the Stopwatch Mode, the stopwatch
1/20 second hand and the upper right dial hand move
to 0.
Countdown
End Beeper
• You can start elapsed time measurement with the
stopwatch while the watch is in the Stopwatch Mode or
the Timekeeping Mode.
Start Time
Reset Time
Progress Beeper
• The display range of the stopwatch is 59 minutes, 59.95
seconds.
10'00"
5'00"
4'00"
3'00"
2'00"
1'00"
0'30" 0'10" 0'00"
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• You cannot switch to another mode while a stopwatch
elapsed time operation is in progress.
Upper right
dial
0'10" 0'09" 0'08" 0'07" 0'06" 0'05" 0'04" 0'03" 0'02" 0'01"
(stopwatch
minute) hand
Stopwatch 1/20
second hand
Using the Countdown Timer
To start an elapsed time operation while in the Stopwatch Mode
1. In the Timekeeping Mode, press D to enter the Stopwatch Mode.
2. In the Stopwatch Mode, press B to start elapsed time measurement.
3. Press B to stop elapsed time measurement.
• You can restart and stop elapsed time measurement as many times as you like by
pressing B.
• The 1/20 second hand rotates during the first 60 seconds only, and then stops.
Whenever elapsed timing is stopped (by pressing B), the 1/20 second hand
jumps to the 1/20 second indication (which is kept internally).
4. Check the elapsed time.
• The upper right dial and second hands move counterclockwise during a countdown
operation. The upper right dial hand moves every 30 seconds of the countdown, and
one revolution represents 30 minutes.
Second hand
30 minutes
25 minutes
5 minutes
• After you are finished measuring elapsed time, press D to reset the stopwatch to all
zeros. The stopwatch will reset to all zeros even if you press D while elapsed time
measurement is in progress.
• To return to the Timekeeping Mode, press D while the stopwatch is reset to all
zeros.
20 minutes
10 minutes
15 minutes
Upper right
dial hand
To start an elapsed time operation while in the Timekeeping Mode
1. In the Timekeeping Mode, press B to start elapsed time measurement.
• Elapsed time measurement will start internally when you press B, but timing will
not appear for about one second.
Hand movement
during a countdown
Upper right dial
countdown minute scale
• When the countdown reaches zero, the watch starts a count up elapsed time
operation in one-second increments. The upper right dial and second hands move
clockwise during an elapsed time operation. The upper right dial hand moves every
minute of the elapsed time operation, and one revolution represents 60 minutes.
• The elapsed time operation will not start if you press B in the Timekeeping Mode
while either of the following conditions exists.
While an alarm is sounding
While the watch is changing from one date to the next (at midnight)
2. Press B to stop elapsed time measurement.
60 minutes
• You can restart and stop elapsed time measurement as many times as you like by
pressing B.
50 minutes
10 minutes
• The 1/20 second hand rotates during the first 60 seconds only, and then stops.
When elapsed time measurement is stopped (by pressing B), the 1/20 second
hand jumps to the 1/20 second indication (which is kept internally).
3. Check the elapsed time.
• After you are finished measuring elapsed time, press D to reset the stopwatch to all
zeros. The stopwatch will reset to all zeros even if you press D while elapsed time
measurement is in progress.
40 minutes
20 minutes
30 minutes
Upper right dial
elapsed time minute scale
Elapsed time operation
hand movement
•
To return to the Timekeeping Mode, press
D
while the stopwatch is reset to all zeros.
• The elapsed time operation will continue until you stop it. Note, however, that only
minutes are indicated by the upper right dial hand. There is not indication of the hour
to let you know how many revolutions the upper right dial hand has made.
Countdown Timer
To use the countdown timer
Second hand
You can set the countdown start time within a range of
one minute to 30 minutes. The watch has a preset “reset
time” of five minutes. Pressing a button resets the
countdown start time to five minutes. A progress beeper
keeps you informed of the progress of the countdown. An
alarm sounds when the timer reaches zero, and a count
up elapsed time operation starts. All of this makes the
countdown timer a useful tool for yacht racing.
• Whenever you enter the Countdown Timer Mode, the
upper right dial hand initially will move to the TMR
position. After about one second, the upper right dial
hand will move to the countdown start time (minutes)
and stop there.
Press B while in the Countdown Timer Mode to start the
countdown timer.
• Press B while a countdown operation is in progress to
pause it. Press B again to resume the countdown.
• To stop a countdown operation completely, first pause it
(by pressing B), and then press D. This will return the
countdown time to its starting value.
• You also can perform the above operations to pause and
restart the elapsed time operation after it starts.
• You will not be able to switch to another mode while a
countdown is in progress.
L Upper right
dial hand
To set the countdown start time
• In the Countdown Timer Mode, the timekeeping second
hand points straight down (6 o’clock position).
1. In the Countdown Timer Mode, press D to reset to the
initial countdown start time (indicated by the upper right
dial hand).
2. Press A to advance the hand by one minute.
• Keep pressing A until it is at the start time you want.
• Holding down A at this time will move the hand at high
speed. To stop high-speed hand movement, press any
button.
Timekeeping
second hand
Countdown timer
minute hand
• When you enter the Countdown Time Mode, the upper right dial hand initially will
point to the currently set countdown start time.
• The initial factory default setting for the countdown start time is 10 minutes.
• For details about the progress beeper, see “Progress Beeper”.
• All of the operations in this section are performed in the Countdown Timer Mode.
• When setting the countdown start time, remember that
one revolution of the upper right dial hand represents 30
30 minutes
Countdown Timer Beeper Operations
minutes.
25
5
• To set a countdown start time of 30 minutes, move the
upper right dial hand to 0 (or 60).
The watch beeps at various times during a countdown so you can keep informed
about the countdown status without looking at the display. The following
describes the types of beeper operations the watch performs during a countdown.
minutes
minutes
• See the following section for information about resetting
the countdown start time to 5 minutes while a
countdown is in progress.
Countdown End Beeper
20
10
The watch beeps each second of the final 10 seconds before a countdown
reaches zero, and at zero. The first five beeps (seconds 10 through 6) are lower
pitched than the final five beeps (seconds 5 through 1).The watch emits a longer
beep to signal when the countdown reaches zero.
minutes
minutes
15 minutes
To reset the countdown to the reset time (5 minutes)
While a countdown is in progress or paused in the Countdown Timer Mode, press A
once.
• This will cancel the ongoing countdown and cause the upper right dial hand to move
to 5 and stop there. This will also cause the stopwatch second hand to move to 0.
• At this time you could use the procedure under “To set the countdown start time” to
change the start time setting.
• The countdown end beeper always sounds and cannot be turned off.
Progress Beeper
The progress beeper sounds at the 5, 4, 3, 2, and 1-minute point, and 30-second
point of the countdown.
• If you set a countdown start time of 2 to 5 minutes, the progress beeper will start to
sound after the first minute is counted down. If you set a countdown start time of 3
minutes, for example, the progress beeper will start to sound when the countdown
reaches the 2-minute point.
• If you set a countdown start time of 1 minute, the progress beeper will sound once
when the countdown reaches the 30-second point.
• The progress beeper always sounds and cannot be turned off.
3
Operation Guide 5007
World Time
Adjusting the Home Positions
The World Time Mode shows you the current time in 29
cities (29 time zones) around the world. A simple
operation swaps your Home City with the currently
selected World Time city.
• When you enter the World Time Mode, the stopwatch
second hand will move automatically to the city code
that is currently selected as the World Time city. At the
same time, the hour and minute hands will move to the
current time in that city.
• The upper right dial hand shows whether or not Daylight
Saving Time (summer time) is turned off for the currently
selected city code.
• If the current time shown for a city is wrong, check your
Home City settings and make the necessary changes.
• All of the operations in this section are performed in the
World Time Mode.
If the time and date settings are wrong even after the time calibration signal is
Current time (hour) in
the currently selected
World Time city
received normally, use the following procedure to adjust their home positions.
To adjust the home positions
1. In the Timekeeping Mode, as you hold down A, hold
City code
24-hour
hand
Stopwatch second hand
down C for about three seconds until the watch beeps.
• This indicates that the watch is in the time and date
home position adjustment mode.
• First is timekeeping second hand and stopwatch
second hand home position adjustment.
• If the timekeeping second hand moves to “0”, it is in
the correct home position. If it doesn’t, use D to
move the timekeeping second hand to “0”.
• The stopwatch second hand is also in the proper
Timekeeping
home position if it moves to 12 o’clock. If it doesn’t,
press B to move it to 12 o’clock.
second hand
Minutes
Correct timekeeping second
hand and stopwatch second
hand home positions
2. After confirming that the timekeeping second hand and
stopwatch second hand are both at the proper home
positions, press C.
This will switch to hour hand and minute hand home
position adjustment.
Upper right
dial hand
Seconds
Minute hand
Hour hand
To view the time in another city
In the World Time Mode, use D to move the stopwatch second hand to the city code
of the city you want to select as the World Time city.
• The hour hand, minute hand, 24-hour hand, and date display will change
automatically to the applicable settings for the currently selected city code.
• All buttons (except for C for changing modes) are disabled while the hands and
date display are changing.
• The hour hand and minute hand are at their proper
home positions if they both move to 12 o’clock, and if
the 24-hour hand is pointing at hour 24. If the hands
are not positioned correctly, use D (+) and B (–) to
move all three hands to their proper home positions.
• The 24-hour hand moves in accordance with the hour,
minute, and second settings. As you set the time, take
care to ensure that the 24-hour hand also is at the
correct position.
3. After confirming that the hour and minute hands are in
the correct home positions, press C. This will advance
to upper right dial hand home position adjustment.
• The upper right dial hand is in the correct home
position if it is pointing at 0 (or 60). If it isn’t, use
D (+) and B (–) to move the hand to 0 (or 60).
4. After confirming that the upper right dial hand is in the
correct home position, press C. This will advance to
date home position adjustment.
• The watch will beep if the city code you select is your current Home City.
• For full information on city codes, see the “City Code Table”.
To toggle a city code time between Standard Time and Daylight Saving Time
24-hour hand
Correct hour and minute
hand home position
1. In the World Time Mode, use D to select the city code
Upper right dial hand
whose Standard Time/Daylight Saving Time setting you
want to change.
Upper right dial hand
2. Hold down A for about three seconds until the watch
beeps. This will cause the upper right dial hand to
toggle between ON (Daylight Saving Time) and OFF
(Standard Time).
• Note that you cannot switch between Standard Time and
Daylight Saving Time while UTC is selected as the city
code.
• The date is in the correct home position if it shows “1”.
If it doesn’t, use D (+) and B (–) to change the date
to “1”.
• Note that the Standard Time/Daylight Saving Time
L Hold down
setting affects only the currently displayed city code.
A for three
Other city codes are not affected.
L
seconds.
Correct upper right dial
hand home position
• Pressing C here will return to the timekeeping
second hand and stopwatch second hand home
position adjustment in step 1 of this procedure.
5. Press A to return to the Timekeeping Mode.
• After you complete the home position adjustment
procedure, place the watch in a location that allows
good time calibration signal reception, and then perform
a manual receive operation. See “To perform manual
receive” for more information.
• The Standard Time/Daylight Saving Time setting of your
Home City can be changed in the Timekeeping Mode
only. See “To set the time and date manually” for more
information.
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time city. This
changes your Home City to your World Time city, and your World Time city to your
Home City. This capability can come in handy when you travel frequently between two
cities in different time zones.
Date
Correct date home position
• If your current World Time city supports receipt of a time calibration signal, making it
your Home City enables calibration signal reception.
Timekeeping
To swap your Home City and World Time city
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.
• All of the operations in this section are performed in the
Timekeeping Mode.
Stopwatch
Hour hand second hand
1. In the World Time Mode, use D to select the World Time city you want.
2. Hold down B for about three seconds until the watch beeps.
• This will make the World Time city (which you selected in step 1), your Home City. At
the same time, it will change the Home City you had selected prior to step 2 to your
World Time city.
24-hour
hand
Minute
hand
To set the time and date manually
1. In the Timekeeping Mode, hold down A for about five
seconds until the watch beeps twice.
• The stopwatch second hand will move to the city code
of the currently selected Home City. This is the city
code setting mode.
• After swapping the Home City and World Time city, the watch stays in the World
Time Mode with the city that was selected as the Home City prior to step 2 now
displayed as the World Time city.
Alarm
• The second hand will stop at “0”.*
When the alarm is turned on, the alarm sounds when the
alarm time is reached.
* Some models show “60” instead of “0”.
2. Use D to change the Home City setting.
• For full information on city codes, see the “City Code
Table”.
Alarm time (minute)
Upper right
dial
Timekeeping
second hand
• The upper right dial hand points to AL while the watch is
in the Alarm Mode. The stopwatch second hand points
to the current alarm on (ON)/off (OFF) setting, while the
hour, minute, and 24-hour hands indicate the current
alarm time setting.
(day of the
week) hand
Date
3. Use B to cycle through the DST settings in the sequence shown below.
• All of the operations in this section are performed in the
Alarm Mode.
Auto DST
(AT/AUTO)
DST off (OFF)
DST on (ON)
To set an alarm time
1. In the Alarm Mode, hold down A for about three
seconds until the watch beeps. This indicates it is in the
• Auto DST (AT/AUTO) can be selected only while LON, PAR, ATH, HNL, ANC,
LAX, DEN, CHI, NYC, HKG, or TYO is selected as the Home City code. For more
information, see “Daylight Saving Time (DST)”.
• Even after you change the DST setting, you can still use D to select a different
Home City code if you want.
24-hour
hand
Mode
indicator
setting mode.
• The stopwatch second hand will move to ON (alarm
on) at this time.
Alarm time (hour)
4. After the Home City and DST settings are the way you want, press C.
• This will cause the watch to beep, and the stopwatch second hand and upper
right dial hand to move to their 12 o’clock positions.This is the time setting mode.
5. Use D (+) and B (–) to change the time (hour and minute) setting.
• As you set the time, take care to ensure that the 24-hour hand also is at the
correct position.
2. Use D (+) and B (–) to change the alarm time setting.
• Each press of either button moves the hands one-minute.
3. After setting the alarm time, press A to exit the setting mode.
• Setting the alarm time causes the alarm to turn on automatically.
• As you set the alarm time, take care to ensure that the 24-hour hand also is at the
correct position.
00
6. After the time setting is the way you want, press C.
• This will cause the watch to beep and change to the
year setting mode.
Stopwatch
second
hand
10
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in.
20
30
40
7. Use D and B to change the year setting.
• Each press of B will move the stopwatch second
hand and change the year setting in 10-year units.
• Each press of D will move the timekeeping second
hand and change the year setting in one-year units.
8. After the year setting is the way you want, press C.
• This will cause the watch to beep and change to the
month setting mode.
• Alarm operations are performed in accordance with the Timekeeping Mode time.
• Pressing any button stops the alarm tone operation.
90
80
To toggle an alarm on and off
In the Alarm Mode, press A to toggle the alarm ON and OFF.
70
50
60
Setting the year (10-year units)
0
Timekeeping
second hand
1
9
8
7
2
3
4
6
5
Setting the year
(1-year units)
4
Operation Guide 5007
9. Use D to move the stopwatch second hand to the
month setting you want.
Dec
Charging Guide
Nov
Jan
After a full charge, timekeeping remains enabled for up to about five 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.
Oct
Sep
Aug
Feb 10.After the month setting is the way you want, press C.
• This will cause the watch to beep and change to the
date setting mode.
Mar
11.Use D (+) and B (–) to change the date setting.
• Pressing C will return to the time setting mode.
12.After all the settings are the way you want, press A to
return to the Timekeeping Mode.
Exposure Level (Brightness)
Outdoor sunlight (50,000 lux)
Approximate Exposure Time
8 minutes
Apr
Jul
May
Sunlight through a window (10,000 lux)
30 minutes
Jun
• Pressing A any time during the above procedure will
return to the Timekeeping Mode, where the timekeeping
second hand will resume timekeeping from second 0.
• The day of the week is displayed automatically in
accordance with the date (year, month, and day)
settings.
Setting the month
Daylight through a window on a cloudy day
(5,000 lux)
48 minutes
Indoor fluorescent lighting (500 lux)
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 charging.
Date
Setting the date
RecoveryTimes
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Power Supply
Exposure Level
(Brightness)
Approximate Exposure Time
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.
Level 3
Level 2
Level 1
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.
Solar cell
Outdoor sunlight (50,000 lux)
1 hour
20 hours
73 hours
Sunlight through a window
(10,000 lux)
2 hours
• 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. Even if the face of the watch
is blocked from light only partially,
charging will be reduced significantly.
Daylight through a window on
a cloudy day (5,000 lux)
4 hours
– – –
– – –
Indoor fluorescent lighting
(500 lux)
34 hours
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Important!
Reference
• 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 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.
• 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.
• The special rechargeable (secondary) battery used by your watch is not intended to
be removed or replaced by you. Use of a rechargeable battery other than the special
one specified for this watch can damage the watch.
Auto Return Features
• If you leave the watch in the Alarm Mode or home position adjustment mode for two
or three minutes without performing any operation, it returns to the Timekeeping
Mode automatically.
• If you do not perform any operation for about two or three minutes while a setting
mode is selected, the watch will exit the setting mode automatically.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 3 and when you have the battery replaced.
• Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to keep the rechargeable battery from going dead.
High-Speed Movement
• The D and B buttons are used to change the hand setting in various setting
modes. In most cases, holding down these buttons will start high-speed movement
of the applicable hand(s) and day.
• High-speed movement of hands and day will continue until you press any button, or
until the moving hand(s) and day finishes one complete cycle.
- One complete cycle for the hands is one revolution (360 degrees) of the hour
hand, or 24 hours.
Battery Power Levels
The movement of the analog hands indicates the current battery power level.
Level
Hand Movement
Normal.
Function Status
- One complete cycle for the day is 31 days.
1
2
All functions enabled.
• High-speed hand movement also is triggered by changing from one mode to
another, changing a World Time Mode setting (changing the World Time city in the
World Time Mode, swapping the World Time city and Home city), etc.
• All buttons (except for the C button for changing modes) are disabled during a high-
speed hand or date operation.You will be able to perform button operations again
after high-speed operation is stopped.
• Second hand jumps
every 2 seconds.
Beeper and time
calibration signal
• Date changes to home reception disabled.
position.
3
• Second hand stopped. All functions disabled.
• Hour and minute hands
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.
stopped at 12 o’clock.
Jumps two seconds
• The second hand jumping every two seconds (Level 2) indicates that battery power
is quite low. Expose the watch to light as soon as possible to charge the battery.
• When battery power is at Level 2, time calibration signal reception is disabled.
• At Level 3, all functions are disabled and settings return to their initial factory
defaults. The watch will continue to keep time internally for about one month after the
battery drops to Level 3. If you recharge the battery sufficiently during this period,
the analog hands will move automatically to the correct setting and normal
timekeeping will resume.
• Alarm operation can cause hand movement to stop due to a sudden temporary drop
in battery power. This does not indicate malfunction, and normal operation will
resume when the watch is exposed to light.Though hand movement stops,
timekeeping continues internally, and the hands will be adjusted to the correct
setting when normal operation returns.
• 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 automatically for the
period January 1, 2000 to December 31, 2099. Setting of the date by the time
calibration signal will not 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.
Charging Precautions
• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time with the precision noted in “Specifications”.
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.
Timekeeping
Warning!
• The year can be set in the range of 2000 to 2099.
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.
• 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 or when battery power drops to
Level 3.
• The date will change automatically when the current time reaches midnight. The
date change at the end of the month may take more time than normal.
• The current time for all time zones in the Timekeeping Mode and World Time Mode
is calculated in accordance with the Coordinated Universal Time (UTC) offset of
each zone, based on your Home Time Zone time setting.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
• 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.
5
Operation Guide 5007
Power Saving
Power Saving enters a sleep state automatically whenever the watch is left for a
certain period in an area where it is dark. The table below shows how watch functions
are affected by Power Saving.
• There actually are two sleep state levels: “second hand sleep” and “function sleep”.
Elapsed Time in Dark
Operation
60 to 70 minutes
(second hand sleep)
Second hand only is stopped, all other functions are
enabled.
6 or 7 days
(function sleep)
• All functions, including analog timekeeping, disabled
• Internal timekeeping maintained
• 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.
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area.
• Press any button.
Specifications
Accuracy at normal temperature: 20 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, 24-hour, day,
day of the week
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
Receivable Time Calibration Signals:
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz); Anthorn,
England (Call Sign: MSF, Frequency: 60.0 kHz); 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)
WorldTime: 29 cities (29 time zones)
Other: Standard Time/Daylight Saving Time (summer time); Home City/World
Time City swapping
Stopwatch: Measuring capacity: 59'59.95''
Measuring unit: 1/20 second
Measuring mode: Elapsed time
Countdown Timer:
Measuring unit: 1 second
Input range: 1 to 30 minutes (1-minute increments)
Other: Progress beeper; One-touch reset of countdown start time to 5 minutes
Alarm: Daily alarm
Other: Power Saving
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 5 months (from full charge to Level 3) under
the following conditions:
• Watch is not exposed to light
• Internal timekeeping
• Analog hands operational 18 hours per day, sleep state 6 hours per day
• 10 seconds of alarm operation per day
• 6 minutes of signal reception per day
City Code Table
City
Code
City
Code
City
UTC Offset/
GMT Differential
City
UTC Offset/
GMT Differential
PPG
HNL
ANC
LAX
DEN
CHI
NYC
SCL
RIO
FEN
RAI
UTC
LON
PAR
ATH
Pago Pago
Honolulu
Anchorage
Los Angeles
Denver
Chicago
New York
Santiago
–11.0
–10.0
–09.0
–08.0
–07.0
–06.0
–05.0
–04.0
–03.0
–02.0
–01.0
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
TYO
ADL
SYD
NOU
WLG
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
+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
Dhaka
Yangon
Bangkok
Hong Kong
Tokyo
Adelaide
Sydney
Noumea
Wellington
Rio De Janeiro
Fernando de Noronha
Praia
+00.0
London
Paris
Athens
+01.0
+02.0
• Based on data as of March 2008.
• The rules governing global times (UTC offset and GMT differential) and summer
time are determined by each individual country.
6
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