MO0804-EA
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Operation Guide 5038
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.)
Charge
General Guide
• Press C to change from mode to mode.
• About 1.5 seconds after you enter the Dual Time Mode, Alarm Mode, or Home
Position Adjustment Mode the hands will move the position that indicates the current
setting of the mode. You cannot change to another mode while the hands are
moving. To change to another mode, either press C before the hands start to move,
or wait until the hands stop before pressing C.
• In the Timekeeping Mode (except when a setting screen is on the display), press B
to illuminate the face of the watch.
The electricity generated by the solar cell of the watch is
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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. Even if the face of the watch is
blocked only partially from light, charging will be reduced
significantly.
Bright light
Rechargeable battery
LEVEL 1
LEVEL 2
Electrical
energy
All
functions
enabled.
charge
Timekeeping Mode
Dis-
T
A
LEVEL 1
Some
functions
LEVEL 2
disabled.
C
H
Press C.
Y
M
E
T
E
R
• 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 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.
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
Stopwatch 1/20 second hand
Hour hand
Minute hand
• 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.
Date
Stopwatch
minute hand
▲
24-Hour hand
Second hand
(Timekeeping/
Stopwatch)
Stopwatch Mode
Dual Time Mode
▲
Home Position
Adjustment Mode Alarm Mode
▲
Radio-controlled Atomic Timekeeping
Long-wave
time
calibration
signal
Transmitter
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
Chinese Time Calibration Signal
The Chinese time calibration signal (BPC) is maintained by the National Time Service
Center (http://www.ntsc.ac.cn/) of the Chinese Academy of Sciences, and is
transmitted from a transmitter (68.5 kHz) located in Shangqiu. The time data of the
Chinese time calibration signal is maintained by the National Time Service Center.
• Note that transmission of the calibration signal may be interrupted occasionally due
to maintenance, lightning, etc.
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.
• Whenever you need to travel outside of the time zone where Beijing is located
(UTC+8), use the procedure under “To select your Home Time Zone” to change the
watch’s Home Time Zone setting as required.
• When using the watch outside the range of the time calibration signal transmitter,
you have to adjust the current time setting manually as required. See “Timekeeping”
for more information about manual time settings.
• 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.
Your watch receives a time calibration signal and updates
its time setting accordingly.
• This watch is designed to receive the time calibration
signal transmitted from Shangqiu City, Henan Province,
China (Call Sign: BPC, Frequency: 68.5 kHz).
• Your watch will be able to receive the signal whenever
Beijing (UTC+8) is selected as its Home Time Zone, and
the watch is within range of the transmitter. The initial
factory Home Time Zone setting of the watch is Beijing
(UTC+8), so you will not need to change the setting if
you are in the same time zone (UTC+8) as Beijing.
• As of January 2008, China does not use Daylight Saving
Time (DST). If China does go to the Daylight Saving
Watch
Time system in the future, some functions of this watch
may no longer operate correctly.
▲
To select your Home Time Zone
UTC offset value
3. Press A to exit the setting mode.
• The second hand will return at high speed to the applicable current time position and
resume normal timekeeping.
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
five 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!
• 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.
This watch is designed to receive a time calibration signal late at night. Because of
this, you should place the watch near a window as shown in the illustration when you
take it off at night. Make sure there are no metal objects nearby.
1. In the Timekeeping Mode, hold down A until the UTC
offset value starts to flash. This is the setting mode.
• At this time the second hand will move at high speed
to the 12 o’clock position and stop there.
• The UTC offset value shows the difference in hours
between the currently selected time zone and
Coordinated Universal Time.
• The DST indicator shows whether Daylight Saving
Time (summer time) currently is being applied in the
currently selected time zone.
2. Use B (+) to scroll through available time zones.
• For information about time zones, see the “Time Zone
Table”.
• If you want the watch to receive the Chinese time
calibration signal, select 8.0 (UTC+8, Beijing) as your
Home Time Zone.
12 o’clock
or
▲
• Make sure the watch is facing the right way.
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Operation Guide 5038
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Changchun
Shanghai
Among or
behind
mountains
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. Take care that
you do not perform any button operations or move the watch during this time.
Approximate Reception Range
• At distances further than about 500 kilometers from the Shangqiu (China)
transmitter, signal reception may not be possible during certain times of year or
times of day. Radio interference may also cause problems with reception.
• 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.
About Auto Receive
The watch starts to receive the time calibration signal automatically when the time in
the Timekeeping Mode reaches 1:00 a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00
a.m. each day (calibration times). When any auto receive is successful, the remaining
auto receive operations are not performed.
Note
• Auto receive normally is performed when a calibration time is reached while the
watch is in the Timekeeping Mode and Dual Time Mode. The receive operation is not
performed if you are performing a button operation.
• Auto receipt 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 seven minutes when the time in
the Timekeeping Mode reaches a calibration time. 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 current time in the
Timekeeping Mode.
500 km
Chengdu
Inside a
vehicle
1,500 km
To perform manual receive
W (WORK)
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If reception is not successful, the second hand will move to N (NO). Five seconds
later, the second hand will resume normal operation, without any adjustment of the
hand setting.
• If the second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing A.
R (READY)
Near
household
appliances,
office
equipment,
or a mobile
phone
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 A for about two
seconds until the watch beeps.
• The second hand will move to R (READY) to indicate
that the watch is setting up for time calibration reception.
• The second hand will move to W (WORK) and stay there
while actual reception is in progress.
• If signal reception is unstable during reception, the
second hand may move between W (WORK) and R
(READY) .
Y (YES)
• The hour and minute hands continue to keep time
normally.
• Time calibration signal reception takes from two to
seven minutes. Take care that you do not perform any
button operations or move the watch during this time.
• If reception is successful, the second hand will move to
Y (YES). Five seconds later, the hands will move to the
correct time.
N (NO)
Beijing
Near a
construction
site, airport,
or other
sources of
electrical
noise
Shangqiu
Near hightension
power lines
Hong Kong
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive
operation was successful.
To check the latest signal reception results
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
The second
hand is
pointing at N
(NO).
The time
setting is
incorrect
following
signal
reception.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
• You changed the time setting
• You performed some button
• The watch is not in the
• Signal reception results are reset
• Radio interference is often
• The home position of the hands is
In the Timekeeping Mode, press A.
• Whenever the watch successfully performs any signal
receive operation from 1:00 a.m. onwards, the second
hand will move to Y (YES). If the watch has been unable
to receive any signal successfully, the second hand will
move to N (NO).
• The watch will return to the Timekeeping Mode after five
seconds or when you press A.
• The current receive result is cleared when the first auto
receive operation is performed on the following day. This
means Y (YES) indicates successful signal reception
since the start of the current day.
• If you adjust the time or date setting manually, the
second hand will move to N (NO).
What you should doProblem Probable Cause
• Perform manual signal receive
manually.
operation during the auto receive
operation.
Timekeeping or Dual Time Mode.
at 1:00 a.m. each day.
present during the day time, which
can interfere with calibration
signal reception.
off.
at night or wait until the next
auto signal receive operation
is performed.
• Enter the Timekeeping or Dual
Time Mode and try again.
• Check to make sure the watch
is in a location where it can
receive the signal.
• Enter the Home Position
Adjustment Mode and adjust
the home position.
Stopwatch
Stopwatch 1/20 second hand
* This hand rotates and indicates
the second count during the first
60 seconds.
Second hand
Stopwatch minute
hand
To measure elapsed time
1. Press B to start the stopwatch.
2. Press B to stop the stopwatch.
• You can resume the measurement operation by pressing B again.
• The 1/20 second hand rotates during the first 60 seconds only, and then stops.
3. Check the elapsed time.
• Press A to reset the stopwatch. Resetting the stopwatch causes the stopwatch
1/20-second hand and the second hand to move to 12 o’clock, and the digital display
to reset to zero.
Stopwatch
1/100 second
When elapsed timing is stopped (by pressing B), this hand jumps to the 1/20
second indication (which is kept internally).
The stopwatch lets you measure elapsed time.
• The display range of the stopwatch is 59 minutes, 59.99
seconds.
• Entering the Stopwatch Mode causes the second hand,
the stopwatch minute hand and stopwatch 1/20 second
hand to move to the 12 o’clock position.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• 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.
Dual Time
The Dual Time Mode lets you view the current time in 29
time zones around the world.
• Time zones are indicated on the digital display by their
UTC offset values.
• For full information on time zones, see the “Time Zone
Table”.
• The watch will perform a signal receive operation even if
it is in the Dual Time Mode when a calibration time is
reached. If this happens, the Dual Time Mode time
settings will be adjusted in accordance with the current
time in the Timekeeping Mode’s Home Time Zone.
• All of the operations in this section are performed in the
UTC offset value (+1.0)
To view the time in another time zone
While in the Dual Time Mode, press B to scroll eastward through time zones.
• When you release B, the hands will move to the current time in that time zone after
about one second.
• If the current time shown for a time zone is wrong, check the Timekeeping Mode
time setting and your Home Time Zone setting, and make the necessary changes.
Dual Time Mode, which you enter by pressing C.
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