Casio Wave Ceptor WV-200U-1AV User manual

Operation Guide 3139/3456
E-9
xWhen 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” (page E-38) for more information about manual time settings.
xThe 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.
E-8
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and
updates its time setting accordingly.
xSupported time calibration signals: Germany
(Mainflingen), England (Anthorn), United States (Fort
Collins), Japan.
xSee the information under “Signal Reception
Troubleshooting” (page E-27) if you experience problems
with time calibration signal reception.
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.
x
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” (page E-10).
Home Time
(Hour : Minutes Seconds)
PM indicator DST indicator
Month – Day
Day of week
Year
E-7
CC
Countdown Timer
Mode
Stopwatch Mode Alarm Mode
C
E-6
General Guide
xPress Cto change from mode to mode.
xIn any mode (except when a setting screen is on the display), press Bto illuminate
the display.
CC
Timekeeping Mode World Time Mode
E-5
To test the alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-37
To turn the daily alarm and the Hourly Time Signal on and off . . . . . . . . . . . .E-37
To set the time and date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-40
To change the Daylight Saving Time (summer time) setting . . . . . . . . . . . . . .E-45
To turn off Auto Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-46
To turn on Auto Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-46
To turn the button operation tone on and off . . . . . . . . . . . . . . . . . . . . . . . . . .E-47
E-4
Procedure Lookup
The following is a handy reference list of all the operational procedures contained in
this manual.
To specify your Home City . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-10
To perform manual receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-24
To turn auto receive on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-25
To display the Last Signal screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-26
To view the time in another city. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-29
To toggle a city code time between Standard Time and
Daylight Saving Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-30
To set the countdown start time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-31
To use the countdown timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-32
To measure times with the stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-34
To set the alarm time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-36
E-3
Contents
General Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-6
Radio-controlled Atomic Timekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-8
World Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-29
Countdown Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-31
Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-33
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-35
Timekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-38
Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-46
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-54
Operating Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-56
User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-66
E-2
About This Manual
xButton operations are indicated using the letters shown
in the illustration.
xEach 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.
xTo ensure that this watch provides you with the years of
service for which it is designed, carefully read and follow
the instructions in this manual, especially the information
under “Operating Precautions” and “User Maintenance”.
E-1
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.
xBe sure to keep all user documentation handy for future reference.
Caution!
Your watch is shipped with its Auto Display feature (which continually changes the
contents of the digital display) turned on. Calibration signal reception is disabled
while Auto Display is turned on.
Press any button to turn off Auto Display and return to the Timekeeping Mode.
MA1610-EA © 2016 CASIO COMPUTER CO., LTD.

Operation Guide 3139/3456
E-19
Your Home City Auto Receive Start Times
123456
HNL, ANC,
YVR, LAX, YEA,
DEN, MEX,
YWG, CHI, MIA,
YTO, NYC,
YHZ, YYT
Standard Time
Daylight Saving
Time
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
LIS, LON
Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight
*
Daylight Saving
Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight *
1:00 am
*
MAD, PAR,
ROM, BER, STO
Standard Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight
*
1:00 am
*
Daylight Saving
Time 3:00 am 4:00 am 5:00 am Midnight *
1:00 am
*
2:00 am
*
E-18
xSignal 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)
xEven when the watch is within the reception range of a transmitter, signal reception
may be impossible at times due to the effects of geographic contours, structures,
weather, the season of the year, the time of day, radio interference, etc. Note that
the signal becomes weaker at distances of approximately 500 kilometers from the
transmitter, which means that the influence of the conditions listed above becomes
even greater.
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.
E-17
Approximate Reception Ranges
U.K. and German Signals U.S. Signal
Japan Signal
Anthorn 1,500 kilometers
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
Mainflingen
500 kilometers
The Anthorn signal
is receivable within
this area
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
E-16
xThe 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.
Home City Codes and Transmitters
Home City Code Transmitter Frequency
LIS, LON, MAD, PAR, ROM, BER, STO,
ATH, MOW*
Anthorn (England)
Mainflingen (Germany)
60.0 kHz
77.5 kHz
HKG*, BJS*, TPE, SEL, TYO Fukushima (Japan)
Fukuoka/Saga (Japan)
40.0 kHz
60.0 kHz
HNL*, ANC*, YVR, LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO, NYC, YHZ, YYT
Fort Collins, Colorado
(the United States) 60.0 kHz
*The areas covered by the HNL, ANC, MOW, HKG, and BJS city codes are quite
far from the time calibration signal transmitters, and so certain conditions may
cause problems with signal reception.
E-15
xProper signal reception can be difficult or even impossible under the conditions
listed below.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Near high-
tension
power lines
Among
or behind
mountains
xSignal reception normally is better at night than during the day.
xTime 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.
E-14
Important!
xWhen 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
xMake sure the watch is facing the right way.
E-13
xIf you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting (page E-45).
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
xAuto 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”
(page E-18).
xManual 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” (page E-24).
E-12
Important!
xNormally, 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
(page E-24) or you can set the time manually (page E-40).
xThe 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” (page E-16).
xUnder factory default settings, auto receive is turned off for all of the following city
codes: HNL (Honolulu), ANC (Anchorage), MOW (Moscow), HKG (Hong Kong), and
BJS (Beijing). For details about turning on auto receive for these city codes, see “To
turn auto receive on and off” on page E-25.
xYou can disable time signal reception, if you want. See “To turn auto receive on
and off” on page E-25 for more information.
xSee the maps under “Approximate Reception Ranges” (page E-17) for information
about the reception ranges of the watch.
E-11
German/U.K. Signal Japan Signal U.S. Signal
City
Code
City
Name
City
Code
City
Name
City
Code
City
Name
City
Code
City
Name
City
Code
City
Name
LIS Lisbon ATH Athens HKG Hong Kong HNL Honolulu YWG Winnipeg
LON London MOW Moscow BJS Beijing ANC Anchorage CHI Chicago
MAD Madrid TPE Taipei YVR Vancouver MIA Miami
PAR Paris SEL Seoul LAX Los Angeles YTO Toronto
ROM Rome TYO Tokyo YEA Edmonton NYC New York
BER Berlin DEN Denver YHZ Halifax
STO Stockholm MEX Mexico City YYT St. Johns
3. Press Atwice to exit the setting screen.
E-10
To specify your Home City
1. In the Timekeeping Mode, hold down Auntil 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.
xTime 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

Operation Guide 3139/3456
E-29
World Time
The World Time Mode shows you the current time in 48
cities (29 time zones) around the world.
xIf the current time shown for a city is wrong, check
your Home City time settings and make the necessary
changes (page E-10).
xAll of the operations in this section are performed in
the World Time Mode, which you enter by pressing C
(page E-6).
To view the time in another city
While in the World Time Mode, press Dto scroll
eastward through the city codes (time zones).
xFor full information on city codes, see the “City Code
Table” at the back of this manual.
Timekeeping Mode time
Current time in
selected city
City code
UTC offset
E-28
Problem Probable Cause What you should do
Auto receive is
turned on, but the
Level 3 receiving
indicator does
not appear on the
display.
xEven if receive is successful, the Level 3
receiving indicator disappears every day
when the first auto receive operation of
the day is performed.
xTime data (hour, minutes, seconds) only
was received during the last receive
operation. The Level 3 receiving indicator
appears only when time data and date
data (year, month, day) are both received.
xPerform manual signal
receive or wait until the
next auto signal receive
operation is performed.
xCheck to make sure the
watch is in a location
where it can receive the
signal (page E-14).
Time setting
is incorrect
following signal
reception.
xIf the time is one hour off, the DST setting
may be incorrect.
xThe Home City code setting is not correct
for the area where you are using the
watch.
xChange the DST setting to
Auto DST (page E-45).
xSelect the correct Home
City code (page E-10).
xFor further information, see “Important!” (page E-14) and “Radio-controlled Atomic
Timekeeping Precautions” (page E-49).
E-27
Signal Reception Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem Probable Cause What you should do
Cannot perform
manual receive.
xThe watch is not in the Timekeeping Mode.
xYour current Home City is not one of the
following city codes:
HNL, ANC, YVR, LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO, NYC, YHZ, YYT,
LIS, LON, MAD, PAR, ROM, BER, STO,
ATH, MOW, HKG, BJS, TPE, SEL, and
TYO.
xThe countdown timer is running.
xEnter the Timekeeping
Mode and try again
(page E-24).
xSelect one of the cities to
the left as your Home City
(page E-10).
xStop the countdown timer
(page E-32) and try again.
Auto receive is
turned on, but the
Level 3 receiving
indicator does
not appear on the
display.
xYou changed the time setting manually.
xThe watch was not in the Timekeeping or
World Time Mode, or you performed some
button operation during the auto receive
operation.
xPerform manual signal
receive or wait until the
next auto signal receive
operation is performed.
E-26
To display the Last Signal screen
In the Timekeeping Mode, press Dto display the Last Signal screen (indicated by
). The Last Signal screen shows the date and time of the last successful time
calibration signal reception.
D
Home Time
(Hour : Minutes Seconds)
PM indicator
Receive timeDST indicator
Month – Day
Day of week
Current Time and Date Screen Last Signal Screen
Receive dateYear
E-25
xCalibration signal reception is disabled while a countdown timer operation is in
progress.
To turn auto receive on and off
1. In the Timekeeping Mode, press Dto display the Last
Signal screen (page E-26).
2. Hold down Auntil the receiving indicator and current
auto receive setting ( or ) start to flash.
This is the setting screen.
xNote that the setting screen will not appear if the
currently selected Home City is one that does not
support time calibration reception.
3. Press Dto toggle auto receive on ( ) and off
().
4. Press Ato exit the setting screen.
xFor information about city codes that support signal receive, see “To specify your
Home City” (page E-10).
On/Off Status
E-24
To perform manual receive
1. Place the watch on a stable surface so its top
(12o’clock side) is facing towards a window (page E-14).
2. In the Timekeeping Mode, hold down Dfor about two
seconds until RC! appears on the display.
xTime 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.
xAfter signal reception is complete, the display of the
watch changes to the Last Signal screen (page E-26).
Note
xTo interrupt a receive operation and return to the Timekeeping Mode, press D.
xIf the receive operation is unsuccessful, the message appears on
the display for about one or two minutes. After that, the watch returns to the
Timekeeping Mode.
xYou can also change from the Last Signal or screen to the normal
timekeeping screen by pressing D.
Receiving indicator
E-23
xFollowing reception of the time calibration signal and calibration of the watch’s time
setting, the Level 3 receiving indicator will remain on the display in all modes. The
Level 3 receiving indicator will not be displayed if signal reception was unsuccessful
or after you adjust the current time setting manually.
xThe Level 3 receiving 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.
xThe Level 3 receiving indicator indicates that at least one of the auto calibration
signal receive operations was successful. Note, however, that the Level 3 receiving
indicator is cleared from the display when the first auto receive operation of the day
is performed.
E-22
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)
Strong
(Level 3)
xEven 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.
xUse the receiving indicator as a guide for checking signal strength and for finding
the best location for the watch during signal receive operations.
E-21
Note
xWhen 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.
xAuto 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.
xThe watch receives the calibration signal for two to seven minutes everyday when
the time in the Timekeeping Mode reaches each of the calibration times. Avoid
performing any button operation within seven minutes before or after any one of the
calibration times. Doing so can interfere with correct calibration.
xRemember 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.
xCalibration signal reception is disabled while a countdown timer operation is in
progress.
E-20
Your Home City Auto Receive Start Times
123456
ATH
Standard Time 3:00 am 4:00 am 5:00 am Midnight
*
1:00 am
*
2:00 am
*
Daylight
Saving Time 4:00 am 5:00 am Midnight *
1:00 am
*
2:00 am
*
3:00 am
*
MOW
Standard Time 4:00 am 5:00 am Midnight
*
1:00 am
*
2:00 am
*
3:00 am
*
Daylight
Saving Time 5:00 am Midnight *
1:00 am
*
2:00 am
*
3:00 am
*
4:00 am
*
HKG, BJS, TPE,
SEL, TYO Standard Time Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
* Next day

Operation Guide 3139/3456
E-39
Note
xThis watch is capable of displaying text for the day of the week in any one of
nine different languages (English, Spanish, French, Portuguese, German, Italian,
Chinese, Russian, and Japanese).
E-38
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
xWhen setting the time, you can also configure settings for the City Code, the DST
setting, the 12/24-Hour Format, Year, Month, Day, the Language setting, and the
Month/Day display format.
xPressing Din the Timekeeping Mode will display the Last Signal screen.
D
Home Time
(Hour : Minutes Seconds)
PM indicator
Receive timeDST indicator
Month – Day
Day of week
Current Time and Date Screen Last Signal Screen
Receive dateYear
E-37
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn the daily alarm and the Hourly Time Signal on and off
In the Alarm Mode, press Dto cycle through the settings shown below.
DDD
D
Alarm Off
Signal Off
Alarm On
Signal Off
Alarm Off
Signal On
Alarm On
Signal On
Alarm On Indicator / Hourly Time Signal On Indicator
xThe alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.
E-36
To set the alarm time
1. In the Alarm Mode, hold down Auntil the hour setting
of the alarm time starts to flash, which indicates the
setting screen.
xThis automatically turns on the alarm.
2. Press Cto move the flashing between the hour and
minute settings.
3. While a setting is flashing, use D(+) and B(–) to change it.
xWhen setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (Pindicator).
4. Press Ato exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds (in all modes), or until you
stop it by pressing any button.
E-35
Alarm
After you set (and turn on) the daily alarm, the alarm tone
sounds when the alarm time is reached. You can also
turn on an Hourly Time Signal that causes the watch to
beep for about one second every hour on the hour.
xAll of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C(page E-7).
Alarm time
(Hour : Minutes)
Timekeeping Mode time
(Hour : Minutes Seconds)
Alarm on indicator
Hourly time signal on
indicator
E-34
To measure times with the stopwatch
Elapsed Time
DD D D A
Start Stop Re-start Stop Clear
Split Time
DA A D A
Start Split
(SPL displayed)
Split release Stop Clear
Two Finishes
DA D A A
Start Split
First runner
finishes.
Display time of first
runner.
Stop
Second runner
finishes.
Split release
Display time of
second runner.
Clear
E-33
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
xThe display range of the stopwatch is 59 minutes, 59.99
seconds.
xThe stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
xExiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to elapsed
time measurement.
xThe stopwatch measurement operation continues even if
you exit the Stopwatch Mode.
xAll of the operations in this section are performed in
the Stopwatch Mode, which you enter by pressing C
(page E-7).
Minutes
Seconds
Timekeeping Mode time
(Hour : Minutes Seconds)
1/100 second
E-32
To use the countdown timer
Press Dwhile in the Countdown Timer Mode to start the countdown timer.
xWhen the end of the countdown is reached, the alarm sounds for 10 seconds or
until you stop it by pressing any button. The countdown time is reset automatically
to its starting value after the alarm stops.
xPress Dwhile a countdown operation is in progress to pause it. Press Dagain to
resume the countdown.
xTo stop a countdown operation completely, first pause it (by pressing D), and then
press A. This returns the countdown time to its starting value.
xCalibration signal reception is disabled while a countdown timer operation is in
progress.
E-31
Countdown Timer
You can set the countdown timer within a range of one
to 60 minutes. An alarm sounds when the countdown
reaches zero.
xAll of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C(page E-7).
To set the countdown start time
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down Auntil the current
countdown start time starts to flash, which indicates the
setting screen.
xIf the countdown start time is not displayed, use the procedure under “To use
the countdown timer” to display it.
2. While a setting is flashing, use D(+) and B(–) to change it.
3. Press Ato exit the setting screen.
Minutes Seconds
Timekeeping Mode time
(Hour : Minutes Seconds)
E-30
To toggle a city code time between Standard Time and Daylight Saving Time
1. In the World Time Mode, use Dto display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down Ato toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator
not displayed).
xThe DST indicator will appear whenever you display a
city code for which Daylight Saving Time is turned on.
xNote that the DST/Standard Time setting affects only
the currently displayed city code. Other city codes are
not affected.
DST indicator

Operation Guide 3139/3456
E-49
Radio-controlled Atomic Timekeeping Precautions
xThe display of the watch is blank while an auto receive operation is in progress.
xStrong electrostatic charge can result in the wrong time being set.
xThe time calibration signal is bounced 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.
xEven if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
xThe current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
xThe 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 a time
calibration signal cannot be performed starting from January 1, 2100.
xThis watch can receive signals that differentiate between leap years and non-leap
years.
E-48
Auto Return Features
xIf you leave the watch with the Last Signal screen in the Timekeeping Mode for one
or two minutes without performing any operation, it returns to the Current Time and
Date screen in the Timekeeping Mode automatically.
xIf you leave the watch in the Alarm Mode for two or three minutes without
performing any operation, it returns to the Timekeeping Mode automatically.
xIf you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
The Band Dbuttons are used in various modes and setting screens to scroll
through data. 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 or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
E-47
Button Operation Tone
The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.
xEven if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down Cto toggle the button operation tone
on (MUTE not displayed) and off (MUTE displayed).
xSince the Cbutton is also the mode change button, holding it down to turn the
button operation tone on or off also causes the watch’s current mode to change.
xThe MUTE indicator is displayed in all modes when the button operation tone is
turned off.
MUTE indicator
E-46
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.
Auto Display
Auto Display continually changes the contents of the digital display.
To turn off Auto Display
Press any button to turn off Auto Display. This returns to the Timekeeping Mode.
To turn on Auto Display
In the Timekeeping Mode (page E-6), while holding down B, hold down Dfor about
two seconds until the watch beeps.
Note
xCalibration signal reception is disabled while Auto Display is being performed.
xAuto Display cannot be performed while a setting screen is on the display.
E-45
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the city code starts to flash, which
indicates the setting screen.
2. Press Cand the DST setting screen appears.
3. Use Dto cycle through the DST settings in the sequence shown below.
DD
Auto DST
( )
DST off
( )
DDST on
( )
4. When the setting you want is selected, press Ato exit the setting screen.
xThe DST indicator appears to indicate that Daylight Saving Time is turned on.
E-44
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) includes 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 received time
signal.
The time calibration signals transmitted from Fukushima and Fukuoka/Saga (Japan)
do not include summer time data.
xThe default DST setting is Auto DST ( ) whenever you select ANC, YVR,
LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, YYT, LIS, LON, MAD,
PAR, ROM, BER, STO, ATH, MOW, HKG, BJS, TPE, SEL, or TYO as your Home
City code.
xIf 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.
E-43
xSee the “City Code Table” at the back of this manual for a complete list of
available city codes.
xSee the “Day of the Week List” at the back of this manual for information on
abbreviations used.
xAuto DST ( ) can be selected only while HNL, ANC, YVR, LAX, YEA,
DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, YYT, LIS, LON, MAD, PAR,
ROM, BER, STO, ATH, MOW, HKG, BJS, TPE, SEL, or TYO is selected as the
Home City code. For more information, see “Daylight Saving Time (DST)” below.
4. Press Ato exit the setting screen.
E-42
Screen: To do this: Do this:
Reset the seconds to Press D.
Change the hour, minutes, or year
Use D(+) and B(–).
Change the month or day
Change the language
: English : Spanish
: French : Portuguese
: German : Italian
: Chinese : Russian
: Japanese
Use Dand B.
Toggle the month/day display format
between month/day (M/D) and day/month
(D/M).
Press D.
E-41
CC
C
City
Code
12/24-Hour
Format Seconds MinutesHourDST
Month/Day Display
Format Language Day Month Year
C
CCC C
CCC
3. When the setting you want to change is flashing, use Band/or Dto change it as
described below.
Screen: To do this: Do this:
Change the city code Use D(east) and B(west).
Cycle between auto DST ( ),
Standard Time ( ), and Daylight
Saving Time ( )
Press D.
Toggle between 12-hour ( ) and
24-hour ( ) timekeeping Press D.
E-40
Setting the Time and Date
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.
To set the time and date
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cto change the flashing contents in the
sequence shown below to select other settings.
City code

Operation Guide 3139/3456
E-55
World Time: 48 cities (29 time zones)
Other: Standard Time/Daylight Saving Time (summer time)
Countdown Timer:
Measuring unit: 1 second
Input range: 1 minute to 60 minutes (1-minute increments)
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 59' 59.99"
Measuring modes: Elapsed time, split time, two finishes
Alarm: Daily alarm; Hourly Time Signal
Illumination: EL Backlight (electro luminescent panel)
Other: Auto Display function; Button operation tone on/off
Battery: One lithium battery (Type: CR1620)
Approximately 3 years on type CR1620 (assuming alarm operation 10 seconds
per day, one illumination operation 3 seconds per day and one signal reception
6minutes per day)
Frequent use of illumination can shorten battery operating time.
Specifications are subject to change without notice.
E-54
Specifications
Accuracy at normal temperature: ± 20 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week
(English, Spanish, French, Portuguese, German, Italian, Chinese,
Russian, Japanese)
Time format: 12-hour and 24-hour
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); Standard Time/
Daylight Saving Time (summer time); Month/Day display format
Time Calibration Signal Reception: Auto receive up to six times a day (remaining
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); 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)
E-53
Illumination
This watch has an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In any mode (except when a setting screen is on
the display), press Bto illuminate the display for about three seconds.
Illumination Precautions
xThe electro-luminescent panel that provides illumination loses power after very
long use.
xIllumination may be hard to see when viewed under direct sunlight.
xThe watch may emit an audible sound whenever the display is illuminated. This
is due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
xIllumination turns off automatically whenever an alarm sounds.
xFrequent use of illumination runs down the battery.
E-52
xThe UTC offset is a value that indicates the time difference between a reference
point in Greenwich, England and the time zone where a city is located.
xThe letters “UTC” is the abbreviation for “Coordinated Universal Time”, which 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.
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.
xWith the 12-hour format, the PM indicator (P) appears on the display for times in
the range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
xWith the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
E-51
xThe watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery goes dead or is replaced. TYO (Tokyo) causes the watch 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 after having the watch’s battery replaced.
Timekeeping
xResetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
xThe day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
xThe year can be set in the range of 2000 to 2099.
xThe 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.
xThe times for the Timekeeping Mode and all the city codes of the World Time Mode
are calculated in accordance with each city’s UTC offset.
E-50
xThough 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.
xNormally, 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.
xIf you are in an area where proper time calibration signal reception is impossible,
the watch keeps time with the precision noted in “Specifications”.
xIf you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code (page E-10), DST
(summer time) (page E-45), and auto receive settings (page E-25). The following are the
initial factory defaults for these settings.
Setting Initial Factory Default
City code (Tokyo)
DST (summer time) (Auto switching)
Auto receive (Auto receive)
L-3
City
Code City UTC
Differential Other major cities in same time zone
RAI Praia –1
LIS Lisbon 0 Dublin, Casablanca, Dakar, Abidjan
LON London
MAD Madrid
+1 Milan, Amsterdam, Algiers, Hamburg, Frankfurt, Vienna
PAR Paris
ROM Rome
BER Berlin
STO Stockholm
ATH Athens
+2 Helsinki, Istanbul, Beirut, Damascus, Cape TownCAI Cairo
JRS Jerusalem
MOW Moscow +3 Kuwait, Riyadh, Aden, Addis Ababa, Nairobi
JED Jeddah
THR Tehran +3.5 Shiraz
DXB Dubai +4 Abu Dhabi, Muscat
KBL Kabul +4.5
KHI Karachi +5 Male
L-2
City
Code City UTC
Differential Other major cities in same time zone
PPG Pago Pago –11
HNL Honolulu –10 Papeete
ANC Anchorage –9 Nome
YVR Vancouver –8 San Francisco, Las Vegas, Seattle/Tacoma, Dawson City
LAX Los Angeles
YEA Edmonton –7 El Paso
DEN Denver
MEX Mexico City
–6 Houston, Dallas/Fort Worth, New OrleansYWG Winnipeg
CHI Chicago
MIA Miami
–5 Montreal, Detroit, Boston, Panama City, Havana, Lima,
Bogota
YTO Toronto
NYC New York
CCS Caracas –4 La Paz, Santiago, Port Of Spain
YHZ Halifax
YYT St. Johns –3.5
RIO Rio De Janeiro –3 Sao Paulo, Buenos Aires, Brasilia, Montevideo
City Code Table
L-1
Day of the Week List
Sunday Monday Tuesday Wednesday Thursday Friday Saturday

Operation Guide 3139/3456
L-4
City
Code City UTC
Differential Other major cities in same time zone
DEL Delhi +5.5 Mumbai, Kolkata, Colombo
DAC Dhaka +6
RGN Yangon +6.5
BKK Bangkok +7 Jakarta, Phnom Penh, Hanoi, Vientiane
HKG Hong Kong
+8 Singapore, Kuala Lumpur, Manila, Perth, UlaanbaatarBJS Beijing
TPE Taipei
SEL Seoul +9 Pyongyang
TYO Tokyo
ADL Adelaide +9.5 Darwin
GUM Guam +10 Melbourne, Rabaul
SYD Sydney
NOU Noumea +11 Port Vila
WLG Wellington +12 Christchurch, Nadi, Nauru Island
xBased on data as of July 2016.
xThe rules governing global times (GMT differential and UTC offset) and summer
time are determined by each individual country.