Casio Gw 3000m Manual

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Operation Guide 5121
MA1002-EA
Congratulations upon your selection of this CASIO watch.
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.
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
Button operations are indicated using the letters A 
through D shown in the illustration.
Hand Functionsz z  
Hour Handx x  
Second Handc c  
Minute Handv v  
Left Dial Hand: 
  Indicates the current day of the week and current 
mode.
b b  
24-hour Hand: 
  Indicates the current 24-hour timekeeping hour.
n n  
Right Dial Hands:  
Indicate a time, in 24-hour format, depending on the current 
mode.
m m  
Day
This User’s Guide uses numbers shown above to identify watch hands and indicators.
Things to check before using the watch
1.  Hold down C at least two seconds to enter the Timekeeping Mode, and 
then observe the movement of the x Second Hand.
Is the x Second Hand moving smoothly at one-second intervals?
Is the x Second Hand moving at 
two-second intervals or is it stopped 
completely? 
Go to step 2.
The watch is charged suf ciently. 
For details about charging, see 
“Charging the Watch”.
Power is low. Charge the watch by placing it 
in a location where it is exposed to light. For 
details, see “Charging the Watch”.
NO
YES
YES
NEXT
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To con gure Home City settings” to con gure your Home 
City and daylight saving time settings.
Important!
Proper time calibration signal reception and World Time settings depend on correct 
Home City, time, and date settings in the Timekeeping Mode. Make sure you 
confi gure these settings correctly.
3. Set the current time.
    To set the time using a time calibration signal
See “To get ready for a receive operation”.
    To set the time manually
See “Con guring Current Time and Date Settings Manually”.
The watch is now ready for use.
  For details about the watch’s radio contr olled timekeeping feature, see “Radio    
Controlled Atomic Timekeeping”.
Charging the WatchThe face of the watch is a solar cell that generates power from light. The generated 
power charges a built-in rechargeable battery, which powers watch operations. The 
watch charges whenever it is exposed to light.
Charging GuideWhenever you are not 
wearing the watch, leave 
it in a location where it is 
exposed to light.
  Best charging    
performance is achieved 
by exposing the watch to 
light that is as strong as 
possible.When wearing the watch, 
make sure that its face is 
not blocked from light by the 
sleeve of your clothing.
  The watch may enter a    
sleep state if its face is 
blocked by your sleeve 
even only partially.
Warning!
Leaving the watch in bright light for charging 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.
On the dashboard of a car parked in direct sunlight   
Too close to an incandescent lamp   
Under direct sunlight   
Important!
  Keep the watch in an area normally exposed to bright light when storing it for long    
periods. This helps to ensure that power does not run down.
  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 power to run down. 
Make sure that the watch is exposed to bright light whenever possible.

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Power LevelsYou can get an idea of the watch’s power level by 
observing the movement of the x Second Hand in the 
Timekeeping Mode.
  If the    
x Second Hand is moving normally at one-second 
intervals, power is at Level 1.
  If the    
x Second Hand is moving at two-second intervals, 
power is at Level 2, which is quite low. Expose the watch 
to light as soon as possible so it can charge.
Level Hand Movement Function Status
1 Normal. All functions enabled
2
x Second Hand moves at two-second 
intervals.m Day changes to 1 (home position).Beeper, time calibration signal 
reception disabled
3x Second Hand stopped. 
z 
z Hour Hand and c Minute Hand

stopped at 12 o’clock.All functions disabled
  When power drops to Level 3, all functions will be disabled but the watch will    
continue to keep time internally for about one week. If you recharge the battery 
suf ciently during this period, the analog hands will move automatically to the 
correct setting and regular timekeeping will resume. After one week, all settings 
(including timekeeping) will be cleared. Recharging the battery will reset all settings 
to their initial factory defaults.
Power Recovery ModeThe watch is designed to go into a power recovery mode that stops hand operation 
temporarily whenever power suddenly drops below a certain level due to overuse 
of the alarm tone over a short period. Note that all operations are disabled while the 
watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal 
operation after power recovers (in about 15 minutes). Putting the watch in a location 
where it is exposed to light will help power to recover sooner.
Charging Times
Exposure Level (Brightness)Daily 
Operation
*1Level Change *2
Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 8 minutes 2 hours 24 hours
Window sunlight (10,000 lux) 30 minutes 6 hours 90 hours
Window sunlight on cloudy day
(5,000 lux)48 minutes 8 hours – – –
Indoor fl uorescent lighting (500 lux) 8 hours 92 hours – – –
1  Approximate exposure each day to generate power for normal daily operation.   *
2  Approximate exposure to take power up one level.   *
  The above times are for reference only. Actual times depend on lighting conditions.   
  For details about the operating time and daily operating conditions, see the “Power    
Supply” section of the Speci cations.
Power SavingPower 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)x Second Hand only stopped at 12 o’clock, all 
other functions enabled
6 or 7 days (function sleep)All functions, including analog timekeeping,     
disabled
Internal timekeeping maintained    
 
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch    
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep 
state.
  The watch will not enter a sleep state while it is in the Stopwatch Mode.   
To recover from the sleep state
Move the watch to a well-lit area or press any button.
Radio Controlled Atomic TimekeepingThis watch receives a time calibration signal and updates its time setting accordingly. 
However, when using the watch outside of areas covered by time calibration signals, 
you will have to adjust the settings manually as required. See “Con guring Current 
Time and Date Settings Manually” for more information.
This section explains how the watch updates its time settings when the city code 
selected as the Home City is in Japan, North America, Europe, or China, and is one 
that supports time calibration signal reception.
If your Home City code setting is this:The watch can receive the signal from the 
transmitter located here:
LON, PAR, ATH Anthorn (England), Mainfl ingen (Germany)
HKG Shangqiu City (China)
TYO Fukushima (Japan), Fukuoka/Saga (Japan)
HNL, ANC, LAX, DEN, CHI, NYC Fort Collins, Colorado (United States)
Important!
  The areas covered by    HNL and ANC are quite far from the calibration signal 
transmitters, so certain conditions may cause reception problems.
  When    HNL or HKG is selected as the Home City, only the time and date are 
adjusted according to the time calibration signal. You need to switch manually 
between standard time and daylight saving time (DST) if required. See “To toggle 
the Home City time between standard time and daylight saving time” for information 
about how to do this.
Moves at two-second 
intervals.

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Operation Guide 5121
Approximate Reception Ranges
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Main ingen
The Anthorn signal is receivable 
within this area.2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Japanese Signals Chinese Signal
Fukushima
500 kilometers
1,000 kilometers Fukuoka/Saga
1,500 kilometersChangchun 500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
  Even when the watch is within range of a transmitter, signal reception may be    
impossible due to the effects of geographic contours, structures, weather, the time 
of year, the time of day, radio interference, etc. The signal becomes weaker at 
distances of approximately 500 kilometers, which means that the in uence of the 
above conditions becomes even greater.
  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.
  Main ingen (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: 500 kilometers (310 miles)   
  As of November 2009, China does not use Daylight Saving Time (DST). If China    
does go to the Daylight Saving Time system in the future, some functions of this 
watch may no longer operate correctly.
  Using this watch in a country covered by a time calibration signal that is different    
from the countries it supports may result in incorrect time indication due to local 
application of summer time, etc.
To get ready for a receive operation
  Con rm that the watch is in the Timekeeping Mode. If it isn’t, hold down  1. C at least 
two seconds to enter the Timekeeping Mode.
  The antenna of this watch is located on its 12 o’clock side. Position the watch with  2. 
12 o’clock facing towards a window as shown in the nearby illustration. Make sure 
there are no metal objects nearby.
12 o’clock
or
  Signal reception normally is better    
at night.
  The receive operation 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 operation or move the 
watch during this time.
  Signal reception may be dif cult or even impossible under the conditions    
described below.
Inside or 
among 
buildingsInside a 
vehicleNear 
household 
appliances, 
of ce 
equipment, 
or a mobile 
phoneNear a 
construction 
site, airport, 
or other 
sources of 
electrical 
noiseNear 
high-tension 
power linesAmong 
or behind 
mountains
  What you should do next depends on whether you are using Auto Receive or  3. 
Manual Receive.
  Auto Receive: Leave the watch over night in the location you selected in step 2.    
See “Auto Receive” for details.
  Manual Receive: Perform the operation under “To perform manual receive”.   
Auto Receive
  With Auto Receive, the watch performs the receive operation each day automatically    
up to six times (up to  ve times for the Chinese calibration signal) between the 
hours of midnight and 5 a.m. (according to the Timekeeping Mode time). When any 
receive operation is successful, none of the other receive operations for that day 
are performed.
  When a calibration time is reached, the watch will perform the receive operation only    
if it is in the Timekeeping Mode or World Time Mode. The receive operation is not 
performed if a calibration time is reached while you are con guring settings.
To perform manual receive
  In the Timekeeping Mode, keep  1. A depressed (for about two seconds) as the 
x Second Hand goes through the following sequence.
  Moves to    YES (or Y for some models) or NO (N) to indicate the last signal 
reception result, then to READY (R).
  The  2. 
x Second Hand indicates the operations the watch is currently performing.When the x Second 
Hand is pointed here:It means this:
READY (R) Watch is setting up for reception.
WORK (W) Reception is in progress.
YES (Y)Reception was completed 
successfully.
NO (N) Reception failed for some reason.
  If signal reception is unstable, the    x Second Hand may 
move between
WORK (W) and READY (R).
  The receive operation is complete when the  3. 
x Second 
Hand moves to YES (Y) or NO (N) for about  ve 
seconds, and then resumes regular timekeeping.
  You can return to the Timekeeping Mode manually by    
pressing A while the 
x Second Hand is pointing to 
YES (Y) or NO (N).
  When the receive operation is successful, the watch    
adjusts the time setting accordingly. It does not adjust 
the setting if the operation failed.
 Note
  To interrupt a receive operation and return to the    
Timekeeping Mode, press any button.
To check the result of the latest receive operation
In the Timekeeping Mode, press A.
  The    
x Second Hand will move to YES (Y) for  ve 
seconds if the latest receive operation was successful, 
or NO (N) if it was not. After that, regular timekeeping 
will resume.
  You can return to the Timekeeping Mode manually by    
pressing A while the 
x Second Hand is pointing to YES 
(Y) or NO (N).
Note
  The    
x Second Hand will indicate NO (N) if you have 
adjusted the time or date setting manually since the latest 
receive operation.
Radio-controlled Atomic Timekeeping Precautions
  Strong electrostatic charge can result in the wrong time setting.   
  Even if a receive operation is successful, certain conditions can cause the time    
setting to be off by up to one second.
  The watch is designed to update the date and day of the week automatically for    
the period January 1, 2000 to December 31, 2099. Updating of the date by signal 
reception will no longer be performed starting from January 1, 2100.
  If you are in an area where signal reception is not possible, the watch keeps time    
with the precision noted in “Speci cations”.
  The receive operation is disabled under any of the following conditions.   
While power is at Level 2 or lower   
While the watch is in the power recovery mode   
When the watch is in the function sleep state (“Power Saving”)   
A receive operation is cancelled if an alarm sounds while it is being performed.   
Mode Reference GuideYour watch has four “modes”. The mode you should select depends on what you 
want to do.
To do this: Enter this mode:
  View the current time in your Home City and in one of 29 other cities     
around the globe
  View the current date in the Home City    
  Confi gure Home City and daylight saving time (DST) settings    
  Perform a time calibration receive operation    
  Confi gure time and date settings manually    Timekeeping Mode
Use the stopwatch to measure elapsed time Stopwatch Mode
  Select one of 29 cities (time zones) around the world and view the     
current time there
  Select daylight saving/summer time (DST) or standard time for a     
time zoneWorld Time Mode
Set an alarm time Alarm Mode
Selecting a Mode
With this watch, everything starts from the Timekeeping Mode.
To determine the watch’s current mode
Check the position of the 
v Left Dial Hand as shown 
under “To select a mode”.
To return to the Timekeeping Mode from any other 
mode
Except while the watch is performing auto hand home 
position correction, hold down C at least two seconds until 
the 
x Second Hand returns to 12 o’clock.

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Operation Guide 5121
To select a mode
Press C to cycle between the modes as shown below. The v Left Dial Hand 
indicates the currently selected mode.
>
Timekeeping ModeStopwatch ModeThe hand indicates the day 
of the week.The hand points to 0.C
World Time ModeThe hand points to STD 
or DST. Alarm ModeThe hand points to ALM.
TimekeepingUse the Timekeeping Mode to view the current time and date. To enter the 
Timekeeping Mode from any other mode, hold down C at least two seconds.
Hand Functions
z z  
Hour Handx x  
Second Handc c  
Minute Handv v  
Left Dial Hand:  
Indicates the day of the week.b b  
24-hour Hand: 
  Indicates the current 24-hour timekeeping hour.
n n  
Right Dial Hands: 
  Indicate the current time in the World Time City in 
24-hour format.
m m  
Day
Confi guring Home City SettingsThere are two Home City settings: actually selecting the Home City and selecting 
either standard time or daylight saving time (DST).
To confi gure Home City settings
Note
  This watch does not have a city code that corresponds to    
Newfoundland.
  In the Timekeeping Mode, keep  1. A depressed (for about 
 ve seconds) as the 
x Second Hand goes through the 
following sequence.
  Moves to    YES (or Y for some models) or NO (N) to 
indicate the last signal reception result, then to READY 
(R), and then to the city code of the currently selected 
Home City.
  This is the city code setting mode.   
  The watch will exit the setting mode automatically if you do not perform any    
operation for about two or three minutes.
  For details about city codes, see the “City Code Table”.   
  To change the Home City setting, press  2. D to move the 
x Second Hand clockwise.
  Keep pressing    D until the x Second Hand is pointing 
at the city code you want to select as your Home City.
  Each time you change the city code setting, the    
z Hour Hand, c Minute Hand, b 24-hour Hand and m Day move to the current time and date for that city 
code. Do not perform the next operation until these 
hands stop moving.
  Press  3. B to toggle the time for the currently selected 
city code between STD (standard time)/DST (daylight 
saving time).
  While you are selecting the Home City code, the    
v Left Dial Hand will indicate 
whether the currently selected city code is con gured for standard time (STD) or 
daylight saving/summer time (DST).
  Note that you cannot switch between    STD (standard time)/DST (daylight saving 
time) while UTC is selected as your Home City.
  After all the settings are the way you want, press  4. A to return to the Timekeeping 
Mode.
To toggle the Home City time between standard time and daylight saving time
  Perform the step 1 under “To con gure Home City settings”. 1. 
  Each time you select a city code, the    
z Hour Hand, c Minute Hand, and b 24-hour Hand move to the current time for that city code. Do not perform the 
next operation until these hands stop moving.
  While you are selecting the Home City code, the    
v Left Dial Hand will indicate 
whether the currently selected city code is con gured for standard time (STD) or 
daylight saving/summer time (DST).
  Press  2. B to toggle the time for the city code of the currently selected Home City 
between STD (standard time)/DST (daylight saving time).
  Note that you cannot switch between    STD (standard time)/DST (daylight saving 
time) while UTC is selected as your Home City.
  After the setting is the way you want, press  3. A to return to the Timekeeping Mode.
 Note
  After you specify a city code, the watch will use UTC* offsets to calculate the    
World Time based on the current time in your Home City.
  Selecting some city codes makes it possible for the watch to receive the time    
calibration signal for the corresponding area automatically. See “Radio Controlled 
Atomic Timekeeping” for details.
  Coordinated Universal Time, the world-wide scientifi c standard of timekeeping.    *
The reference point for UTC is Greenwich, England.

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Confi guring Current Time and Date Settings ManuallyYou can con gure current time and date settings manually when the watch is unable 
to receive a time calibration signal.
To change the current time setting manually
  In the Timekeeping Mode, keep  1. A depressed (for about 
 ve seconds) as the 
x Second Hand goes through the 
following sequence.
  Moves to    YES (or Y for some models) or NO (N) to 
indicate the last signal reception result, then to READY 
(R), and then to the city code of the currently selected 
Home City.
  The    
v Left Dial Hand will indicate whether the 
currently selected city code is con gured for standard 
time (STD) or daylight saving/summer time (DST).
  Change the Home City and daylight saving time (DST) settings, if you want. 2. 
  For details about these settings, see steps 2 and 3 under “To con gure Home    
City settings”.
  In the following steps, each press of    C cycles between settings as shown below.
Home city/DSTHour/MinuteYear
(tens digit)
DayMonth
Year
(ones digit)
\  Press  3. C.
  The    x Second Hand will move to 12 o’clock. This is 
the time setting mode.
  Use  4. D (+) and B (–) to change the time (hour and 
minute) setting.
  Each press of either button will move the hands    
(
z Hour Hand and c Minute Hand) one minute.
  Holding down    D or B will start high-speed z Hour 
Hand and c Minute Hand movement in the applicable 
direction. To stop high-speed hand movement, press 
any button.
  The    
b 24-hour Hand and z Hour Hand move in sync 
with each other.
  When setting the time, make sure that the    
b 24-hour Hand indicates the proper 
a.m./p.m. hour.
  If you want to change the date setting at this time, press    C and perform the 
procedure starting from step 3 under “To change the current date setting 
manually”.
  After the time setting is the way you want, press  5. A to return to regular 
timekeeping.
  This will cause the    
x Second Hand to move automatically to 12 o’clock and 
resume movement from there.
To change the current date setting manually
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00
50 10
4020
30 90
60 80
70
Setting the year (tens digit)  In the Timekeeping Mode, keep  1. A depressed 
(for about  ve seconds) as the x Second Hand 
goes through the following sequence.
  Moves to    YES (or Y for some models) or NO (N) 
to indicate the last signal reception result, then 
to READY (R), and then to the city code of the 
currently selected Home City.
  Press  2. C twice.
  The    
x Second Hand will move to the tens digit 
of the current year setting. This is the year 
setting mode.
  The year can be set in the range of 2000 to    
2099.
@0
5 1
42
3
9
6 8
7
Setting the year (ones digit)  Press  3. D to move the x Second Hand clockwise 
until it is pointing at the year tens digit you want 
to select.
  After you select the year tens digit, press  4. C.
  The    
x Second Hand will move to the ones digit 
of the current year.
  Press  5. D to move the 
x Second Hand clockwise 
until it is pointing at the year ones digit you want 
to select.
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Dec
May Jan
AprFeb
Mar Sep
Jun Aug
Jul
Setting the month OctNov  After you select the year ones digit, press  6. C.
  The    x Second Hand will move to the currently 
selected month. This is the month setting 
mode.
  Use  7. D to move the 
x Second Hand to the 
month setting you want.
  After the month setting is the way you want,  8. 
press C.
  The    
x Second Hand will move to 12 o’clock, 
and the watch will enter the day setting mode.

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Operation Guide 5121
  Use  9. D (+) and B (–) to change the m Day setting.
  If you want to change the time setting at this time,    
press C and then perform the procedure starting 
from step 3 under “To change the current time setting 
manually”.
  After the settings are the way you want, press 
10. A to 
return to regular timekeeping.
  This will cause the    
x Second Hand to move 
automatically to 12 o’clock and resume movement 
from there.
  The day of the week indicated by the    
v Left Dial Hand 
changes automatically in accordance with the date 
(year, month, and day).
Note
  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 rechargeable battery replaced or after power 
drops to Level 3.
Using the StopwatchThe stopwatch measures elapsed time and split times.
Hand Functions
x x  
Second Hand:  
Indicates the stopwatch 1/10-second 
count.
v v  
Left Dial Hand:  
Indicates the stopwatch 1/100-second 
count.
n n  
Right Dial Hands:  
Indicate the stopwatch minutes and 
seconds.
To perform elapsed time measurement
  Use  1. C to move the 
v Left Dial Hand to 0.
  This indicates the Stopwatch Mode.   
  Now you can perform either of following stopwatch operations. 2. 
  You will not be able to perform any stopwatch operation while the hands are    
moving to their initial positions after you enter the Stopwatch Mode.
To perform an elapsed time operation
B
BBBDStart Stop (Restart) (Stop) Reset
To pause at a split time
B
DNormal stopwatch hand movement will 
resume automatically after  ve seconds.BDStart Split Stop Reset
Note
  The Stopwatch Mode can indicate elapsed time up to 23 minutes, 59.99 seconds.   
  In the following cases, the hands of the watch are moving, so pressing    D or B will 
not perform any stopwatch operation.
  While the hands are moving to elapsed timekeeping after you enter the Stopwatch    
Mode
  While the watch is changing dates at midnight   
  Once started, stopwatch timing continues until you press    B to stop it, even if you 
exit the Stopwatch Mode to another mode or timing reaches the stopwatch limit 
de ned above.
  Whenever you enter the Stopwatch Mode, the hands of the watch move to their    
initial Stopwatch Mode positions. If you did not reset the stopwatch the last time you 
used it, the hands will return to the positions they were in the last time you exited the 
Stopwatch Mode.
  The    
x Second Hand indicates the 1/10-second count for the  rst 30 seconds of 
a stopwatch elapsed time operation. After that, the hand stops at 0. 1/10-second 
timing continues internally after the  rst 30 seconds, and the 
x Second Hand will 
jump to the current value whenever B (Stop) or D (Split) is pressed.
  Though the    
v Left Dial Hand is stopped while an elapsed time measurement 
operation is in progress, the watch keeps track of the 1/100-second count internally. 
The 
v Left Dial Hand will jump to the current 1/100-second reading whenever you 
stop the stopwatch or perform a split time operation.
Checking the Current Time in a Different Time ZoneYou can use the World Time Mode to view the current time in one of 29 time 
zones around the globe. Each time zone has a “city code”, which is a three-letter 
abbreviation of a representative city in the zone. The representative city of the time 
zone that is currently selected in the World Time Mode is called the “World Time City”.
Hand Functions
x x  
Second Hand:  
Indicates the currently selected World 
Time City.
v v  
Left Dial Hand:  
Indicates the current STD (standard 
time) or DST (daylight saving time) 
setting of the currently selected World 
Time City.
n n  
Right Dial Hands:  
Indicate the current time in the 
selected World Time City in 24-hour 
format.
To view the time in another time zone
  Use  1. C to move the 
v Left Dial Hand to STD or DST.
  This indicates the World Time Mode.   
  Use  2. D to move the 
x Second Hand to the city code you want to select as the 
World Time City.
  The    
n Right Dial Hands will move to the current time in the currently selected 
World Time City. At this time, the z Hour Hand and c Minute Hand will continue 
to indicate the current time in the Home City.
  For full information on city codes, see the “City Code Table”.   

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  If you think that the time indicated for the selected World Time City is not correct,    
it probably means that there is something wrong with your Home City settings. 
Use the procedure under “To con gure Home City settings” to correct the Home 
City settings.
To specify standard time or daylight saving time (DST) for a time zone
Hold down 
A for two 
seconds

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  In the World Time Mode, use  1. D to select the city code 
for the time whose setting you want to change.
  Wait until the    
n Right Dial Hands complete their move 
to the time in the currently selected World Time City. 
You will not be able to perform step 2 of this procedure 
until the hands stop moving.
  Hold down  2. A for about two seconds until the watch 
beeps. This will cause the 
v Left Dial Hand to toggle 
between DST (daylight saving time) and STD (standard 
time).
  Note that you cannot switch between    STD (standard 
time)/DST (daylight saving/summer time) while UTC is 
selected as the World Time City.
  Note that the    STD (standard time)/DST (daylight 
saving/summer time) setting affects only the currently 
selected time zone. Other time zones are not affected.
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time City. This 
capability can come in handy when you frequently travel between two locations in 
different time zones.
The following example shows what happens when the Home City and World Time 
City are swapped while the Home City originally is TYO (Tokyo) and the World Time 
City is NYC (New York).
Home City World Time City
Before swappingTokyo
10:08 p.m.
(Standard time)New York
9:08 a.m.
(Daylight saving time)
After swappingNew York
9:08 a.m.
(Daylight saving time)Tokyo
10:08 p.m.
(Standard time) 
To swap your Home City and World Time City
  In the World Time Mode, use  1. D to select the World 
Time City you want.
  In this example, you would move the    
x Second Hand 
to NYC in order to select New York as the World 
Time City.
  Wait until the    
n Right Dial Hands complete their move 
to the time in the currently selected World Time City. 
You will not be able to perform step 2 of this procedure 
until the hands stop moving.
   Hold down  2. B for about three seconds until the watch 
beeps.
  This will make the World Time City (   NYC in this 
example) your new Home City. At the same time, it will 
change the Home City you had selected prior to step 2 
(TYO in this example) to your World Time City.
  After swapping the Home City and World Time City,    
the watch will stay in the World Time Mode. The 
x Second Hand will point to your new World Time City 
(TYO in this example).
  The    
n Right Dial Hands will indicate the current time in 
your new World Time City.
Note
  If your current World Time City supports time calibration signal reception, making it    
your Home City enables calibration signal reception for that city.
Using the AlarmWhen the alarm is turned on, an alarm will sound for about 10 seconds each day 
when the time in the Timekeeping Mode reaches the preset alarm time. This is true 
even if the watch is not in the Timekeeping Mode.
Hand Functions
x x  
Second Hand:  
Indicates the current alarm ON/OFF 
setting.
v v  
Left Dial Hand:  
Points to ALM.n n  
Right Dial Hands:  
Indicate the current alarm time 
setting in 24-hour format.
To change the alarm time setting
  Use  1. C to move the 
v Left Dial Hand to ALM.
  This indicates the Alarm Mode.   
  Use  2. D (+) and B (–) to change the alarm time setting.
  Each press of either button will move the    
n Right Dial Hands one minute.
  Holding down    D or B will start high-speed hand movement in the applicable 
direction. To stop high-speed hand movement, press any button.
  The alarm always works based on the time kept in the Timekeeping Mode.   
  The watch will return to the Timekeeping Mode automatically if you do not perform    
any operation in the Alarm Mode for about two or three minutes.
To turn the alarm on or off
In the Alarm Mode, press A to toggle the alarm on and off. The 
x Second Hand will 
indicate the current ON/OFF setting.
To stop the alarm
Press any button.

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							5
Operation Guide 5121
Auto Correction of Hand Home PositionsStrong magnetism or impact can cause the hands and/or day setting to be off, even 
if the watch is able to perform the signal receive operation. Auto correction of hand 
home positions correct the hand position automatically.
  Auto correction is performed in the Timekeeping Mode only.   
  Auto correction corrects the positions of the    
z Hour Hand, c Minute Hand, and x Second Hand. For the dial hands and day, you must perform the manual 
adjustment procedure under “Adjusting Home Positions Manually”.
  Each hour, the watch performs automatic correction of the hand positions from    
–55 minutes to +5 minutes.
  You also can trigger auto correction of hand home positions manually, if you want.    
See “To trigger auto correction of hand home positions” for more information.
  Auto correction of hand home positions can take up to three and a half minutes to    
complete.
  If hand positions are off by one hour or more, correct them using the procedure    
under “To trigger auto correction of hand home positions” or “Adjusting Home 
Positions Manually”.
To trigger auto correction of hand home positions
  Perform the following procedure when the time setting is off.   
In the Timekeeping Mode, hold down D for about six 
seconds until the 
x Second Hand completes one full 
revolution.
  Though the    
x Second Hand will stop momentarily about 
three seconds after you hold down D, do not release the 
button yet. Wait until the 
x Second Hand completes a full 
revolution before you release D.
  To interrupt an ongoing correction operation and return to    
the Timekeeping Mode, press D again.
  If you release    D when the 
x Second Hand stops the  rst 
time (after about three seconds) in the above operation, 
the watch will enter the home position adjustment mode, 
which is described under “Adjusting Home Positions 
Manually”. If this happens, press A to return to the 
Timekeeping Mode and then perform the above operation 
again.
  Manually triggered auto correction of hand home positions performs the following    
two steps.
  The hands will move automatically in order to determine the home positions of the  1. 
watch.
  After the hand home positions are determined, the watch will return to normal  2. 
timekeeping automatically. This completes the correction operation.
Adjusting Home Positions ManuallyStrong magnetism or impact can cause the hands and/or date of the watch to be 
off, even if the watch is able to perform the signal receive operation. If this happens, 
perform the applicable home position adjustment procedures in this section.
  Hand home position adjustment is not required if the time and day settings are    
correct.
  You also can use auto correction of the hand home positions to correct the home    
positions of the 
z Hour Hand, c Minute Hand, and x Second Hand.
Note
Any time after you enter the home position adjustment mode in step 1 of the following 
procedure, you can return to the Timekeeping Mode by pressing A. The watch also 
will return to the Timekeeping Mode automatically if you do not perform any operation 
for about two or three minutes in the home position adjustment mode. In either case, 
any adjustments you made before the watch returned to the Timekeeping Mode will 
be applied.
To adjust home positions
  Hold down  1. C at least two seconds until the 
x Second 
Hand stops and then starts moving again.
  Hold down  2. D for about three seconds.
  The    
x Second Hand will start to move when you  rst 
press D. Keep D depressed until the x Second 
Hand stops.
  The watch is now in the home position adjustment    
mode.
  The watch will exit the home adjustment mode    
automatically if you do not perform any operation for 
about two or three minutes.
  First is    
x Second Hand home position adjustment.
  If the    x Second Hand moves to 12 o’clock, it is in the correct home position. If it 
doesn’t, use D to move it to 12 o’clock.
  Each press of    C in the home position adjustment mode will cycle through the 
adjustment settings as shown below.
x Secondz Hour/ c Minute/ b 24-hourn Right Dial Hands
v Left Dial Handm Day
  When adjusting a hand or the date home position, it is recommended that after    
you move to a proper home position, you press B to move the setting back one 
step. Next, press D again to return it to the home position. This helps to ensure 
better home position adjustment accuracy.
  After con rming that the  3. 
x Second Hand is at the proper 
home position, press C. This will switch to z Hour 
Hand and c Minute Hand home position adjustment.
  The    z Hour Hand and c Minute Hand are at their 
proper home positions if they both move to 12 o’clock. 
The 
b 24-hour Hand also will move along with z Hour Hand movement, and cannot be adjusted 
individually. If the hands are not positioned correctly, 
use D (+) and B (–) to move them to their proper 
home positions.
  After con rming that the  4. 
z Hour Hand and c Minute 
Hand are in their correct home positions, press C. 
This will switch to 
n Right Dial Hands home position 
adjustment.
  The    
n Right Dial Hands are at their proper home positions if they both move to 
24. If the hands are not positioned correctly, use D (+) and B (–) to move them 
to 24.

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B+
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  After con rming that the  5. n Right Dial Hands are in the 
correct home position, press C. This will advance to 
v Left Dial Hand home position adjustment.
  The    v Left Dial Hand is in the correct home position if 
it is pointing at 12 o’clock. If it isn’t, use D (+) and B 
(–) to move it to 12 o’clock.
  After con rming that the  6. 
v Left Dial Hand is in the 
correct home position, press C. This will advance to 
day home position adjustment.
  The    
m Day is in the correct home position if it 
shows 1. If it doesn’t, use D (+) and B (–) to change 
the day to 1.
  Press  7. A to return to the Timekeeping Mode.
  The    
m Day moves to the current day, and then the z Hour Hand and the c Minute Hand will move to the current time. Wait until everything stops moving.
Troubleshooting
Hand Movement and Position
  I lost track of what mode the watch is in.
Refer to “To select a mode”. To return directly to the Timekeeping Mode from any 
other mode, hold down C at least two seconds.
  The 
x Second Hand is moving at two second intervals.
  All the watch’s hands are stopped at 12 o’clock and none of the buttons work.
Power may be low. Expose the watch to light until the 
x Second Hand starts moving 
normally, at one-second intervals.
  The hands of the watch suddenly start moving at high speed, even when I do 
not perform any operation.
This could be due to any one of the following causes. In all cases, the hand movement 
does not indicate malfunction, and should stop shortly.
  The watch is recovering from a sleep state.   
  The time setting is being adjusted following a successful auto time calibration signal    
receive operation.
  The watch is returning to the Timekeeping Mode automatically from the Alarm Mode.   
  Hands suddenly stop moving. Button operation also is disabled.
The watch may be in the power recovery mode. Do not perform any operation until the 
hands return to their normal positions (in about 15 minutes). The hands should return 
to their correct positions when power recovers. To help power recover, leave the 
watch in a location where it is exposed to light.
  The current time setting is off by hours. 
Your Home City setting may be wrong. Check your Home City setting and correct it, 
if necessary.
  The current time setting is off by one hour.
If you are using the watch in an area where time calibration signal reception is 
possible, see “To con gure Home City settings”.
If you are using the watch in an area where time calibration signal reception is not 
possible, you may need to change your Home City’s STD (standard time)/DST 
(daylight saving/summer time) setting manually. Use the procedure under “To toggle 
the Home City time between standard time and daylight saving time” to change the 
STD/DST setting.
  The hands and/or day indications are off.
This could indicate that the watch has been exposed to magnetism or strong impact, 
which has caused problems with proper hand and day alignment. Adjust the watch’s 
hand and day home position alignment.
World Time Mode
  The World Time indicated by the n Right Dial Hands in the World Time Mode is 
one hour off from the actual time in the selected World Time City.
The STD (standard time)/DST (daylight saving/summer time) setting of the selected 
World Time City may be wrong. Select the correct STD (standard time)/DST (daylight 
saving/summer time) setting.
  The World Time indicated by the 
n Right Dial Hands in the World Time Mode 
is off.
Your Home City settings may be wrong. Check your Home City settings and correct 
them, if necessary.
Charging
  The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 3. Continue exposing the watch 
to light until the 
x Second Hand starts moving normally (at one-second intervals).
  The x Second Hand starts to move at one-second intervals, but then suddenly 
returns to moving at two-second intervals.
The watch probably is not suf ciently charged yet. Continue keeping it exposed to 
light.
Time Calibration Signal
The information in this section applies only when LON, PAR, ATH, HNL, ANC, LAX, 
DEN, CHI, NYC, HKG, or TYO is selected as the Home City. You need to adjust the 
current time manually when any other city is selected as the Home City.
  The 
x Second Hand indicates NO (N) when I check the result of the latest 
receive operation.
Possible Cause Remedy
  You are wearing or moving the watch,     
or performing a button operation during 
the signal receive operation.
  The watch is in an area with poor     
reception conditions.Keep the watch in an area where reception 
conditions are good while the signal receive 
operation is being performed.
You are in an area where signal reception 
is not possible for some reason.See “Approximate Reception Ranges”.
The calibration signal is not being 
transmitted for some reason.Check the website of the organization that     
maintains the time calibration signal in your 
area for information about its down times.
Try again later.    
  The current time setting changes after I set it manually.
You may have the watch con gured for Auto Receive of the time calibration signal, 
which will cause the time to be adjusted automatically according to your currently 
selected Home City. If this results in the wrong time setting, check your Home City 
setting and correct it, if necessary.

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							6
Operation Guide 5121
  The current time setting is off by one hour.Possible Cause Remedy
Signal reception on a day for switching 
between STD (standard time)/DST 
(daylight saving/summer time) may have 
failed for some reason.Perform the operation under “To get ready 
for a receive operation”. The time setting will 
be adjusted automatically as soon as signal 
reception is successful.
If you are unable to receive the time calibration 
signal, change the STD (standard time)/DST 
(daylight saving/summer time) setting manually.
  Auto Receive is not performed or I cannot perform Manual Receive.Possible Cause Remedy
The watch is in the Stopwatch Mode.Auto Receive is not performed while the watch 
is in the Stopwatch Mode. Hold down C at least 
two seconds to enter the Timekeeping Mode.
Your Home City setting is wrong.Check your Home City setting and correct it, if 
necessary.
There is not enough power for signal 
reception.Expose the watch to light  to charge it.
  Signal reception is being performed successfully, but the time and/or day is 
wrong.
Possible Cause Remedy
Your Home City setting is wrong.Check your Home City setting and correct it, if 
necessary.
The watch may have been exposed to 
magnetism or strong impact, which has 
caused problems with proper hand and 
day alignment.Adjust the watch’s hand and day home positions.
Specifi cationsAccuracy at normal temperature: ±15 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 29 city codes and Coordinated 
Universal Time); Daylight Saving Time (summer time) / Standard Time
Time Calibration  Signal Reception: Auto receive up to six times a day (5 times a 
day for the Chinese calibration signal; Remaining auto receives 
cancelled as soon as one is successful); Manual receive
Receivable  Time Calibration Signals: 
Main ingen, 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); Shangqiu City, 
Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)
Stopwatch:  Measuring capacity: 23’59.99”
Measuring unit: 1/100 second
Measuring mode: Elapsed time, split time
World Time: 29 cities (29 time zones) and Coordinated Universal Time
Other:  Standard Time/Daylight Saving Time (summer time); Home City/World Time 
City swapping
Alarm: Daily alarm
Other: Power Saving; Auto Correction of Hand Home Positions
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 5 months (no exposure to light after a 
full charge; 10 seconds alarm beeper operation and one signal reception of 
approximately 4 minutes per day)
City Code Table
City Code CityUTC Offset/
GMT Differential
PAGO PAGO (PPG) Pago Pago–11
HONOLULU (HNL) Honolulu–10
ANCHORAGE(ANC) Anchorage–9LOS ANGELES(LAX) Los Angeles–8
DENVER (DEN) Denver–7
CHICAGO (CHI) Chicago–6
NEW YORK (NYC) New York–5
SANTIAGO (SCL) Santiago–4
RIO Rio De Janeiro–3
F. DE NORONHA (FEN) Fernando de Noronha–2
PRAIA (RAI) Praia–1
UTC
0
LONDON (LON) London
PARIS (PAR) Paris +1
ATHENS (ATH) Athens +2
JEDDAH (JED) Jeddah +3
TEHRAN (THR) Tehran +3.5
DUBAI (DXB) Dubai +4
KABUL (KBL) Kabul +4.5
KARACHI (KHI) Karachi +5
DELHI (DEL) Delhi +5.5
DHAKA (DAC) Dhaka +6
YANGON (RGN) Yangon +6.5
BANGKOK (BKK) Bangkok +7
HONG KONG(HKG) Hong Kong +8
TOKYO (TYO) Tokyo +9
ADELAIDE (ADL) Adelaide +9.5
SYDNEY (SYD) Sydney +10
NOUMEA (NOU) Noumea +11
WELLINGTON(WLG) Wellington +12
    Based on data as of June 2009.
    The rules governing global times (UTC offset and GMT differential) and summer 
time are determined by each individual country.