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.)
Bright Light
Charge
Rechargeable battery
The electricity generated by the solar cell of the
watch is stored by a built-in battery. Leaving or
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using the watch where it is not exposed to light
causes the battery to run down. Make sure the
watch is exposed to light as much as possible.
• When you are not wearing the watch on your
wrist, position the face so it is pointed at a
source of bright light.
• You should try to keep the watch outside of
your sleeve as much as possible. Charging is
reduced significantly if the face is only partially
covered.
Electrical
energy
All
LEVEL 1
functions
LEVEL 2
enabled
LEVEL 3
LEVEL 4
charge
Dis-
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 about 8 hours 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.
• 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 L to
illuminate the display.
Timekeeping Mode
Press C.
▲
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting
accordingly.
• This watch is designed to pick up the time calibration signals transmitted in
Germany (Mainflingen), England (Anthorn), the United States (Fort Collins),
China (Shangqiu), and Japan (Fukushima, Fukuoka/Saga).
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.
• 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” below.
• 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
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.
“Timekeeping” for more information about manual time
Rally ModeRecall Mode
▲
Countdown Timer
Mode
▲
Stopwatch ModeAlarm Mode
▲
To specify your Home City
PM indicator
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City code
YVR, LAX : Vancouver, Los Angeles
YEA, DEN : Edmonton, Denver
MEX, CHI : Mexico City, Chicago
MIA, YTO, NYC : Miami, Toronto, New York
YHZ: Halifax
YYT: St.Johns
Seconds
Hour : Minutes
1. In the Timekeeping Mode, hold down A until
the city code starts to flash, which indicates
the setting screen.
2. Press D (east) and B (west) to select the
city code you want to use as your Home City.
LIS,LON : Lisbon,London
MAD, PAR , ROM, BER, STO : Madrid, Paris,
• 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 also can
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 “Time Calibration Signal Reception” and “Transmitters”.
• See the maps under “Approximate Reception Ranges” for information about
the reception ranges of the watch.
• You can disable time signal reception, if you want. See “To turn auto receive
on and off” for more information.
• Under factory default settings, auto receive is turned off for all of the following
city codes: MOW (Moscow), HNL (Honolulu), and ANC (Anchorage). For
details about turning on auto receive for these city codes, see “To turn auto
receive on and off”.
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 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.
12 o’clock
or
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the
conditions listed below.
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.
LIS, MAD, ROM, STO, MOW
HNL*, ANC*, LAX, DEN,
CHI, NYC, YVR, YEA, MEX,
* The areas covered by the HNL, ANC, and MOW city codes are quite far
from the time calibration signal transmitters, and so certain conditions
may cause problems with signal reception.
• Calibration signal reception is disabled while a countdown timer/target time
operation is in progress.
Inside a
vehicle
Home City Code
LON, PAR , BER, ATH,
HKG, BJS
TPE, TYO, SEL
MIA, YTO, YHZ, YYT
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
The Anthorn
signal is
receivable within
this area.
500
kilometers
Fukuoka/Saga
1,000
kilometers
Signals are receivable in the Taiwan area when reception conditions are good.
1,500 kilometers
500 kilometers
Chengdu
Shangqiu
• 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)
Shangqiu (China) transmitter: 1500 kilometers (910 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
LON, Standard Time
LIS
Daylight Saving Time
PA R,
BER,
Standard Time
MAD,
Daylight Saving Time
ROM,
STO
ATH Standard Time
Daylight Saving Time
MOW Standard Time
Daylight Saving Time
HKG, Standard Time and
BJS
Daylight Saving Time
TYO, Standard Time
TPE,
SEL
HNL, Standard Time and
ANC,
Daylight Saving Time
LAX,
DEN,
CHI,
NYC,
YVR,
YEA,
MEX,
MIA,
YTO,
YHZ,
YYT
Auto Receive Start Times
123456
1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight*
2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am
2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am
3:00 am 4:00 am 5:00 am Midnight* 1:00 am*2:00 am
3:00 am 4:00 am 5:00 am Midnight* 1:00 am*2:00 am
4:00 am 5:00 am Midnight* 1:00 am*2:00 am*3:00 am
4:00 am 5:00 am Midnight* 1:00 am*2:00 am*3:00 am
5:00 am Midnight* 1:00 am*2:00 am*3:00 am*4:00 am
1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
Mainflingen
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort
Collins
500
kilometers
Fukushima
1,000
kilometers
Changchun
Beijing
Shanghai
Hong Kong
*Next day
*
*
*
*
*
*
*
2
Operation Guide 3150
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 seven minutes everyday
when the time in the Timekeeping Mode reaches a calibration time. Do not
perform any button operation within seven minutes before or after 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.
About the Signal Strength Indicator
The signal strength 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. The signal strength indicator is displayed
while an auto or manual receive operation is in progress.
Signal strength indicator
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Weak
(Level 1)
• Even in an area where signal strength is strong, it takes about 10 seconds
for signal reception to stabilize enough for the signal strength indicator to
indicate signal strength.
• Use the signal strength indicator as a guide for checking signal strength
and for finding the best location for the watch during signal receive
operations.
• Following reception of the time calibration signal and calibration of the
watch’s time setting, the Level 3 signal strength indicator will remain on the
display in all modes. The Level 3 signal strength indicator will not be
displayed if signal reception was unsuccessful or after you adjust the
current time setting manually.
• The Level 3 signal strength indicator is displayed only when the watch is
able to receive both time and date data successfully. It does not appear
when only time data is received.
• The Level 3 signal strength indicator indicates that at least one of the auto
calibration signal receive operations was successful. Note, however, that
the Level 3 signal strength indicator disappears from the display each day
when the first auto receive operation of the day is performed.
Strong
(Level 3)
To perform manual receive
Receiving
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Receive successful
Receive failed
If there was a previously
successful reception
If no reception was
successful
1. In the Timekeeping Mode, press D to display
the last successful receive time and date
screen.
2. Press D to enter the Receive Mode.
3. Hold down D for about two seconds until
starts to flash on the display.
• 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 the receive operation is successful, the
reception date and time appear on the
display, along with the
4. After manual receive is complete, press D to
return to the Timekeeping mode.
• The watch also will exit the Receive Mode if
you do not perform any button operation for
about one or two minutes.
• If the latest reception fails but a previous
reception was successful, an indicator (
be on the display.
The watch will enter the Receive 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.
Note
• To interrupt a receive operation and return to
the Receive Mode, press D.
GET indicator.
) will
To turn auto receive on and off
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On/Off status
1. In the Timekeeping Mode, press D to display
the last successful receive time and date
screen.
2. Hold down A until the current auto receive
3. Press D to toggle auto receive on (
4. Press A to exit the setting screen.
• For information about city codes that support
ON or OFF) starts to flash. This is the
setting (
setting screen.
• Note that the setting screen will not appear
if the currently selected Home City is one
that does not support time calibration
reception.
OFF).
off (
signal receive, see “To specify your Home City”.
ON) and
To check the latest signal reception results
Press D to view the last successful receive time
and date. Press D again to return to the
previous screen.
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal
reception.
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 3
signal strength
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
• For further information, see “Important!” under “Time Calibration Signal
Reception” and “Radio-controlled Atomic Timekeeping Precautions”.
•The watch is not in the
Timekeeping Mode.
•Your current Home City is not
one of the following: LIS,LON,
MAD, PAR , ROM, BER, STO,
ATH , MOW, HKG, BJS, TPE,
SEL, TYO, HNL, ANC, YVR,
LAX, YEA, DEN, MEX, CHI,
MIA, YTO, NYC, YHZ, or YYT
•You changed the time setting
manually.
•The DST setting was changed
manually in the World Time
Mode.
•You pressed a button while
signal receive was in progress.
•Even if receive is successful,
the Level 3 signal strength
indicator disappears from the
display each day when the first
auto receive operation of the
day is performed.
•Time data (hour, minutes,
seconds) only was received
during the last receive
operation. The Level 3 signal
strength indicator appears only
when time data and date data
(year, month, day) are both
received.
•If the time is one hour off, the
DST setting may be incorrect.
•The Home City code setting is
not correct for the area where
you are using the watch.
What you should doProblemProbable Cause
• Enter the Timekeeping
Mode and try again.
•
Select LIS,LON, MAD,
PA R, ROM, BER, STO,
ATH , MOW, HKG, BJS,
TPE, SEL, TYO, HNL,
ANC, YVR, LAX, YEA,
DEN, MEX, CHI, MIA,
YTO, NYC, YHZ, or YYT
as your Home City.
• 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.
• Change the DST setting
to Auto DST.
• Select the correct Home
City code.
3
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