MO0506-EA
Operation Guide 3722
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 and keep it on hand for later reference
when necessary.
Keep the watch exposed to bright light
Bright light
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• 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 cause 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
• 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.
General Guide
• Press B to change from mode to mode.
• In the Timekeeping Mode, press A to illuminate the face of the watch.
Timekeeping Mode Receive Result Mode
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
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,
Solar cell
Rechargeable battery
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
only partially blocked from light, charging will be reduced
significantly.
Bright light
LEVEL 1
LEVEL 2
LEVEL 3
Electrical
energy
All
functions
enabled.
All functions disabled,
except for analog timekeeping.
charge
Dis-
LEVEL 1
LEVEL 2
LEVEL 3
All
functions
disabled.
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 whenever the battery level reaches Level 3.
••
• This watch does not have a time zone that corresponds to the Greenwich
••
Mean Time differential of –3.5 hours. Because of this, the radio-controlled
timekeeping and World Time functions will not display the correct time for
Newfoundland, Canada.
About This Manual
Minute hand
Hour hand
Second hand
Alarm Mode
• 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
Home Position
Adjustment Mode
Press B.
▲
▲
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly.
The time calibration signal includes both Standard Time and Daylight Saving Time
(summer time) data.
• This watch is designed to pick up the time calibration signal transmitted in the United
States (Fort Collins, Colorado).
• The U.S. time calibration signal can be picked up by the watch while in North
America*.
* The term “Nor th America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
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
Time Zone, which is the time zone where you will normally use the watch. For more
information, see “To specify your Home Time Zone” below.
• When using the watch outside the range of the U.S. time signal transmitter, you have
to adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time settings.
To specify your Home Time Zone
GMT differential
GMT
differential
value
(–08)
• Note that this watch does not have a city code that corresponds to Newfoundland.
value (–05)
GMT differential
value (–06)
GMT differential
value (–07)
1. In the Timekeeping Mode, hold down A for about five
seconds until the second hand moves to the currently
selected GMT differential value and stops. This is the
setting mode.
• The GMT differential value indicates the time
difference in hours between Greenwich Mean Time
and the currently selected time zone.
2. Press B to select the time zone you want to use as
your Home Time Zone.
GMT –05 (5 o’clock): Miami, Toronto, New York,
Montreal, Detroit, Boston, Panama City,
Havana, Lima, Bogota
GMT –06 (6 o’clock): Mexico City, Winnipeg, Chicago,
Houston, Dallas/Fort Worth, New Orleans
GMT –07 (7 o’clock): Edmonton, Denver, El Paso
GMT –08 (8 o’clock): Vancouver, Los Angeles, San
Francisco, Las Vegas, Seattle/Tacoma,
Dawson City
▲
3. Press A eight times to exit the setting mode.
• The watch will also return to the Timekeeping Mode if you do not perform any
operation for about two or three minutes.
• Normally, your watch should show the correct time as soon as you specify your
Home Time Zone. 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.
• 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.
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!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 9 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
• The watch should not be facing the wrong way.
▲
9 o’clock
or
1
Operation Guide 3722
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from four 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.
Reception Ranges
• Under good reception conditions, signal reception is possible within a radius of
about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter.
• At distances further than about 600 miles (1,000 kilometers) from the Fort Collins
transmitter, signal reception may not be possible during certain times of year or
times of day. Radio interferance may also cause problems with reception.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
About Auto Receive
The watch automatically starts to receive the time calibration signal when the time in
the Timekeeping Mode reaches 0:01 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00
a.m. each day (calibration times). The watch will also perform an additional auto
receive at 5:00 a.m. if none of the regularly scheduled auto receive operations are
successful. 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 Time Zone, and whether standard time or Daylight
Saving Time is selected for your Home Time Zone.
Note
• The auto receive operation is performed only if the watch is in the Timekeeping
Mode when one of the calibration times is reached. It is not performed if a calibration
time is reached while an alarm is sounding, or while you are configuring settings.
• 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 four to seven minutes everyday when
the time in the Timekeeping Mode reaches each of the calibration times. Do not
perform any button operation within seven minutes before or after any one of the
calibration times. Doing so can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the 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 is actually the correct time.
To perform manual receive
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 NO. One or two minutes
later, the second hand will resume normal operation, without any adjustment of the
hand setting.
• If the second hand is pointing to YES or NO, you can return to the Timekeeping
Mode by pressing any button.
READY
Inside a
Near
vehicle
household
appliances,
office
equipment,
or a mobile
phone
600 miles
1. Place the watch on a stable surface so its 9 o’clock side
is facing towards a window.
2. In any mode, hold down B for about two seconds until
the watch beeps.
3. When you release B, the second hand will move to
READY to indicate that the watch is setting up for time
calibration reception.
• The second hand will move to WORK and stay there
while actual reception is in progress.
• The hour and minute hands continue to keep time
normally.
• Time calibration signal reception takes from four to
seven minutes, but in some cases it can take up to 14
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
YES. One or two minutes later, the hands will move to
the correct time.
Near a
construction
site, airport, or
other sources
of electrical
noise
2,000 miles
Fort Collins
Near hightension
power lines
Among or
behind
mountains
Viewing the Latest Signal Reception Results
You can use the Receive Result Mode to check if signal reception was performed
correctly.
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
NO.
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
•
• Signal reception results are reset at
• The Home Time Zone setting is not
Enter the Receive Result Mode.
• If the watch was able to perform a successful signal
receive operation since midnight, the second hand will
move to YES. If the watch has been unable to receive
any signal successfully, the second hand will move to
NO.
• To return to the Timekeeping Mode, press B three
times.
• The current receive result is cleared when the first auto
receive operation is performed on the following day. This
means YES indicates successful signal reception since
the start of the current day.
• YES continues to be indicated even if an attempt at
manual receive fails after auto receive is successful.
• If you adjust the time or date setting manually, the
second hand will move to NO.
What you should doProblem Probable Cause
manually.
The watch was not in the
Timekeeping Mode, or you performed
some button operation during the
auto receive operation.
midnight each day.
correct for the area where you are
using the watch.
• Perform manual signal
receive or wait until the next
auto signal receive operation
is performed.
• Check to make sure the
watch is in a location where it
can receive the signal.
• Select the correct Home
Time Zone.
Alarm
When the alarm is turned on, the alarm sounds when the
alarm time is reached.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing B.
• When you enter the Alarm Mode, the second hand will
move to either ON (alarm on) or OFF (alarm off), and
the hands will move to the current alarm time setting.
To set an alarm time
1. In the Alarm Mode, hold down A for five seconds to
display the setting mode.
• The second hand will move to AM or PM.
2. Use A and B to change the alarm time.
• Press B to move the hands clockwise in one-minute
• To move the hands back, press A. After that, each press of B will move the
hands counterclockwise in one-minute steps.
• Once you use the above operation to change to counterclockwise hand
movement, pressing A will not change back to clockwise hand movement.
Pressing A during counterclockwise hand movement will exit the setting mode.
To use clockwise hand movement again, you will need to exit the setting mode
and restart this procedure from step 1.
• When setting the alarm time, take care to set AM and PM correctly. The second
hand will move between AM and PM any time the hour hand moves past 12
o’clock while you are setting the alarm time.
3. After setting the alarm time, press A as many time as necessary to exit the setting
mode.
• If you set the alarm time using clockwise hand movement only, press A twice to exit
the setting mode.
• If you set the alarm time using counterclockwise hand movement, press A once to
exit the setting mode.
• This will cause the hour and minute hands to move to the current time, and the
second hand to move to ON (alarm on).
• Setting the alarm time causes the alarm to turn on automatically.
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in.
• Alarm operations are performed in accordance with the Timekeeping Mode time.
• Pressing any button stops the alarm tone operation.
To turn an alarm on and off
In the Alarm Mode, press A to toggle the alarm ON and OFF.
steps.
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