MO1008-EA
Operation Guide 5161
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.
• 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.
E E-1
• 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.)
E-2
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.
Bright Light
LEVEL 1
LEVEL 2
LEVEL 3
Charge
LEVEL 4
Rechargeable battery
Electrical
energy
All
functions
enabled
Dis-
charge
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Some or all
functions
disabled
Keep the watch exposed to bright light
Bright Light
l
l
l
l
l
l
l
Solar cell
• 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” (page E-45) 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” (page E-69) 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.
The electricity generated by the solar cell of the watch is
stored by a rechargeable battery. Leaving or using the
l
l
l
l
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 covered only partially.
Contents
General Guide ......................................................................................................... E-8
Radio-controlled Atomic Timekeeping ............................................................... E-11
World Time ............................................................................................................. E-32
Alarms ....................................................................................................................E-35
Stopwatch ..............................................................................................................E-40
Countdown Timer .................................................................................................. E-42
Power Supply ........................................................................................................ E-45
Timekeeping .......................................................................................................... E-53
Adjusting Home Positions ................................................................................... E-63
Reference .............................................................................................................. E-67
Specifications ....................................................................................................... E-76
E-3
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-12
To perform manual receive .................................................................................. E-25
To turn auto receive on and off ........................................................................... E-27
To view the latest signal reception results .........................................................E-28
To view the time in another city........................................................................... E-33
To toggle a city code time between Standard Time and
Daylight Saving Time ...................................................................................... E-34
To set an alarm time ............................................................................................. E-36
To turn the Hourly Time Signal on and off ..........................................................E-38
E-6
General Guide
• Press B to change from mode to mode.
• In any mode, press A to illuminate the face of the watch.
• Holding down B for at least two seconds at any time will return directly to the
Timekeeping Mode.
Timekeeping Mode
Press B.
Battery/Receive Mode
▲
▲
E-5
To turn off all alarms and the Hourly Time Signal .............................................. E-39
To measure times with the stopwatch ................................................................ E-40
To configure the countdown timer ...................................................................... E-43
To use the countdown timer ................................................................................ E-44
To set the time and date manually ...................................................................... E-54
To change the Daylight Saving Time (summer time) setting ............................ E-59
To adjust home positions..................................................................................... E-64
To turn the button operation tone on and off .....................................................E-68
To recover from the sleep state ........................................................................... E-70
E-7
World Time Mode Alarm Mode
▲
Countdown Timer Mode
▲
Stopwatch Mode
▲
▲
E-9E-8
Operation Guide 5161
Switching the Display Screen
In the Timekeeping Mode, each press of C changes the contents of the digital
display.
Date Screen
Day
Press C.
▲
Receiving
Indicator and
Seconds Count
▲
Day of week
E-10
• 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.
• As of March 2010, 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 that is different from the
countries it supports may result in incorrect time indication due to local application of
summer time, etc.
To specify your Home City
E-12
4. Press A to exit the setting screen.
• 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 (page
E-25) or you can set the time manually (page E-54).
• 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 page
E-18 and “Transmitters” (page E-72).
• See the maps under “Approximate Reception Ranges” (page E-19) 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” on page E-27 for more information.
• Under factory default settings, auto receive is turned off for all of the following city
codes: HNL (Honolulu) and ANC (Anchorage). For details about turning on auto
receive for these city codes, see “To tur n auto receive on and off” on page E-27.
Current Time
C
Screen
1. In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
Receiving indicator
Appears when reception
is successful.
▲
C
Hour : MinutesPM indicator
Seconds
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” (page E-12).
• 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 “Timekeeping”
(page E-53) for more information about manual time settings.
E-11
2. Press B.
• The city code of the current Home City will flash,
which indicates the setting screen.
3. Press C (east) to select the city code you want to use
as your Home City.
LON : London
City code
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
6 times a day (5 times a day for the Chinese calibration signal). When any auto
receive is successful, the remaining auto receive operations are not performed. For
more information, see “About Auto Receive” (page E-22).
• 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” (page E-25).
PAR :Paris
ATH : Athens
HKG: Hong Kong
TYO : Tokyo
HNL : Honolulu
ANC :Anchorage
LAX : Los Angeles
DEN :Denver
CHI : Chicago
NYC :New York
E-13
E-14
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 pointing 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.
E-16
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Home City Code
LON, PAR, ATH
HKG
TYO
HNL*, ANC*, LAX,
DEN, CHI, NYC
* The areas covered by the HNL and ANC 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 operation is in
progress.
E-18
Transmitter
Anthorn (England)
Mainflingen (Germany)
Shangqiu City (China)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Frequency
60.0 kHz
77.5 kHz
68.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
E-15
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Near
Anthorn
Inside a
vehicle
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport,
or other
sources of
electrical
noise
Mainflingen
Inside or
among
buildings
• Signal reception normally is better at night than during the day.
• Time calibration signal reception takes from three to eight minutes, but in some
cases it can take as long as 16 minutes. Take care that you do not perform any
button operations or move the watch during this time.
Approximate Reception Ranges
U.K. and German Signals
1,500 kilometers
500 kilometers
The Anthorn signal
is receivable within
this area.
Near hightension power
lines
U.S. Signal
Among or
behind
mountains
E-17
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
E-19
Operation Guide 5161
Japan Signals
500 kilometers
Fukuoka/Saga
1,000 kilometers
500 kilometers
Fukushima
1,000 kilometers
China Signal
1,500 kilometers
500 kilometers
Chengdu
E-20
About Auto Receive
The watch receives the time calibration signal automatically up to 6 times a day
(5 times a day for the Chinese calibration signal). 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
Standard Time
LON
Daylight Saving Time
Standard Time
PAR
Daylight Saving Time
Standard Time
ATH
Daylight Saving Time
Standard Time and
HKG
Daylight Saving Time
E-22
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.
• 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.
E-24
Shangqiu
1
1:00 am
2:00 am
2:00 am
3:00 am
3:00 am
4:00 am
1:00 am
Auto Receive Start Times
2
2:00 am
3:00 am
3:00 am
4:00 am
4:00 am
5:00 am
2:00 am
3
3:00 am
4:00 am
4:00 am
5:00 am
5:00 am
Midnight*
3:00 am
4
4:00 am
5:00 am
5:00 am
Midnight*
Midnight*
1:00 am*
4:00 am
5
5:00 am
Midnight*
Midnight*
1:00 am*
1:00 am*
2:00 am*
5:00 am
Changchun
Beijing
Shanghai
Hong Kong
6
Midnight*
1:00 am*
1:00 am*
2:00 am*
2:00 am*
3:00 am*
• Signal reception may not be possible at the distances noted below during certain
times of the year or day. Radio interference also may 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: 1,500 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” (page E-29) if you
experience problems with time calibration signal reception.
Your Home City
TYO
Standard Time
HNL
Standard Time and
ANC
Daylight Saving Time
LAX
DEN
CHI
NYC
Midnight
Midnight
Auto Receive Start Times
234516
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
5:00 am
*Next day
To perform manual receive
Receiving
READY (or R)
1. While in the Timekeeping Mode or Battery/Receive
Mode, hold down C for about two seconds.
• The second hand will move to READY (R) and signal
reception will start.
• The digital display will go blank at this time.
• The second hand will indicate the current reception
status.
READY (or R): Unstable
WORK (or W) : Stable
• Keep the watch in a location where reception is stable
while a receive operation is in progress.
• Signal reception takes from three to eight minutes, but
in some cases it can take as long as 16 minutes. Take
care that you do not perform any button operations or
move the watch during this time.
• Even under optimum reception conditions, it can take
about 30 seconds for reception to stabilize.
E-21
E-23
E-25
• Check the second hand position to find out the status of a receive operation and to
determine the best location for signal reception.
• Note that weather, the time of day, surroundings, and other factors all can affect
reception.
Note
To cancel an ongoing signal receive operation, press any button.
When reception is successful
Receive successful
Receive successful indicator
E-26
4. Press C to toggle auto receive on (ON) and off (OFF).
After the setting is the way you want, press A to exit the setting mode.
5. To return to the Timekeeping Mode, hold down B for at least two seconds.
To view the latest signal reception results
1. In the Timekeeping Mode, press B to enter the Battery/Receive Mode.
2. Press C to display the date and time of the last successful signal reception.
• To return to the Timekeeping Mode, hold down B for at least two seconds.
• If there have been no successful receptions, the time will show “- -:- -”.
E-28
• “GET” appears when reception is complete, and the
watch adjusts its current time setting.
• To return to the Timekeeping Mode after “GET” appears,
press B or C, or do not perform any operation for one
or two minutes.
• The receive successful indicator is displayed after a
successful receive operation.
1 second
▲
▲
1 second
1 second
▲
When reception fails
• The watch displays “ERROR” without adjusting the current time setting.
• To return to the Timekeeping Mode after “ERROR” appears, press B or C, or do
not perform any operation for one or two minutes.
• Once any receive operation is successful, the receive successful indicator will
remain on the display for the rest of the day, even if other receive operations fail.
To turn auto receive on and off
On/Off status
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem Probable Cause
Cannot perform
manual receive.
Auto receive is
turned on, but the
receive successful
indicator does not
appear on the
display.
1. In the Timekeeping Mode, press B to enter the
Battery/Receive Mode.
2. Press C to display the date and time of the last
successful signal reception.
3. Hold down A until the current auto receive setting (ON
or OFF) starts to flash. This is the setting screen.
• Note that the setting screen will not appear if the
currently selected Home City is the one that does not
support time calibration reception.
• For information about city codes that support signal
receive, see “To specify your Home City” (page E-12).
• The watch is not in the
Timekeeping Mode.
• Your current Home City is not
one of the following: LON, PAR,
ATH , HKG, TYO, HNL, ANC,
LAX, DEN, CHI, or NYC
• A countdown timer operation is
in progress.
• You changed the time setting
manually.
• The DST setting was changed
manually.
• You pressed a button while
signal receive was in progress.
What you should do
• Enter the Timekeeping Mode
and try again.
• Select LON, PAR , ATH, HKG,
TYO, HNL, ANC, LAX, DEN,
CHI, or NYC as your Home
City (page E-12).
• Enter the Countdown Timer
Mode and stop the countdown
(page E-42).
• Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
E-27
E-29
Operation Guide 5161
What you should doProblem Probable Cause
Auto receive is
turned on, but
the receive
successful
indicator does
not appear on
the display.
E-30
• Even if reception is successful
on a particular day, the receive
successful indicator will
disappear when the first auto
receive operation is performed
on the following day.
• Time data (hour, minutes,
seconds) only was received
during the last receive
operation. The receive
successful indicator appears
only when time data and date
data (year, month, day) are both
received.
• Check to make sure the watch
is in a location where it can
receive the signal (page E-16).
World Time
World Time shows the current time in 29 cities (29 time
zones) around the world.
World Time
Mode indicator
Current time in
selected city
E-32
To toggle a city code time between Standard Time and Daylight Saving Time
DST indicator
E-34
• The times kept in the World Time Mode are
synchronized with the time being kept in the
Timekeeping Mode. If you feel that there is an error in
any World Time Mode time, check to make sure you
have the correct city selected as your Home City. Also
check to make sure that the current time as shown in
the Timekeeping Mode is correct.
• The World Time Mode indicator is displayed in the World
Time Mode.
• Select a city code in the World Time Mode to display the
current time in any particular time zone around the
globe. See the “City Code Table” at the back of this
manual for information about the UTC differential
settings that are supported.
1. In the World Time Mode, use C to display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down A to toggle between Daylight Saving Time
(DST indicator displayed) and Standard Time (DST
indicator not displayed).
• The DST indicator is shown on the World Time Mode
screen while Daylight Saving Time is turned on.
• Note that the Standard Time/Daylight Saving Time
setting affects only the currently displayed city code.
Other city codes are not affected.
• Selecting Daylight Saving Time for the city that is
currently selected as the Home City, will also apply
Daylight Saving Time to the Timekeeping Mode time.
• Note that you cannot switch between Standard Time
and Daylight Saving Time while UTC is selected as the
city code.
What you should doProblem Probable Cause
Time setting is
incorrect
following signal
reception.
• For further information, see “Important!” (page E-16) and “Radio-controlled Atomic
Timekeeping Precautions” (page E-70).
• All of the operations in this section are performed in the World Time Mode, which
you enter by pressing B (page E-9).
To view the time in another city
In the World Time Mode, press C.
• This will cause the city code of the currently selected World Time City to appear for
about two seconds, followed by the current time in that city.
• Pressing C while a city code is displayed will scroll to the next city code, in the
sequence noted in the “City Code Table” at the back of this manual.
• 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.
• Change the DST setting to
Auto DST (page E-59).
• Select the correct Home City
code (page E-12).
Alarms
The Alarm Mode lets you configure five daily alarms. You
also can use it to turn the Hourly Time Signal on or off.
• The watch beeps for about 10 seconds when an alarm
time is reached.
• Turning on the Hourly Time Signal causes the watch to
beep on the hour every hour.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing B (page
E-9).
Alarm time
(Hour : Minutes)
E-31
E-33
E-35
To set an alarm time
About 1 second
▲
1. In the Alarm Mode, use C to scroll through the alarm screens until the one whose
time you want to set is displayed.
Alarm timeAlarm number
▲
AL1 AL2 AL3
SIG AL5 AL4
• The alarm screens are AL1, AL2, AL3, AL4, and AL5.
2. Hold down A until the hour digits of the current alarm time start to flash. This is the
setting mode.
• Entering the setting mode automatically turns on the displayed alarm.
E-36
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in.
• Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
• To stop the alarm tone after it starts to sound, press any button.
To turn the Hourly Time Signal on and off
1. In the Alarm Mode, use C to select the Hourly Time Signal.
2. Hold down A for about three seconds until “ON” flashes on the display. This is the
setting mode.
• Entering the setting mode automatically turns on the Hourly Time Signal.
E-38
3. Press C to scroll the hour value, until it displays the value you want.
• Set the time correctly as a.m. or p.m. (P indicator) when using 12-hour
timekeeping, or you specify the correct 24-hour time.
• The same 12-hour/24-hour format you select for the Timekeeping Mode time
(page E-54) is also applied in the Alarm Mode.
4. After the hour setting is the way you want, press B to move the flashing to the
minutes.
• Press C to scroll the minute value.
5. When the minute setting is the way you want, press B. This will cause “ON” to flash
on the display.
• Press C to toggle the alarm setting between ON and OFF.
C
▲
▲
6. After the setting is the way you want, press A to exit the setting mode.
3. Press C to toggle the Hourly Time Signal between on and off.
C
▲
▲
4. Press A to exit the setting screen.
To turn off all alarms and the Hourly Time Signal
In the Alarm Mode, hold down C for about three seconds.
• “ALL OFF” will appear on the display indicating all alarms and the Hourly Time
Signal are turned off.
E-37
E-39
Operation Guide 5161
Stopwatch
The stopwatch lets you measure elapsed times.
• The display range of the stopwatch is 59 minutes, 59.99
seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing B (page
E-9).
Minutes
Seconds
To measure times with the stopwatch
C
Start
E-40
➤ ➤➤➤
C
Stop
C
Re-start
Countdown Timer
You can set the countdown timer within a range of one to
100 minutes. An alarm sounds when the cowntdown
reaches zero.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
B (page E-9).
Countdown End Beeper
Minutes
Seconds
E-42
To use the countdown timer
Current timer time
The countdown end beeper lets you know when the
countdown reaches zero. The beeper stops after about 10
seconds or when you press any button.
Press C while in the Countdown Timer Mode to start the
countdown timer.
• The countdown timer operation continues even if you
exit the Countdown Timer Mode.
• Press C while a countdown operation is in progress to
pause it. Press C again to resume the countdown.
• To stop a countdown operation completely, hold down
C for about one second until the countdown time
returns to its starting value.
C
Stop
C
(About 1 second)
Clear
While an elapsed time operation is stopped, the display alternates between two
screens that show the current minutes and seconds, and the 1/100 seconds count.
About 1 second
▲
▲
Seconds
Minutes
To configure the countdown timer
1. While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the current
countdown start time starts to flash, which indicates the
setting screen.
• If the countdown start time is not displayed, use the
procedure under “To use the countdown timer” (page
E-44) to display it.
2. Press C to scroll the minute setting value.
• To specify a countdown time of 100 minutes, set
00:00.
3. Press A to exit the setting screen.
1/100 seconds
Power Supply
This watch is equipped with a solar cell and a rechargeable battery that is charged by
the electrical power produced by the solar cell. The illustration shown below shows
how you should position the watch for charging.
Example: Orient the watch so its face is
pointing at a light source.
• The illustration shows how to position a
watch with a resin band.
• Note that charging efficiency drops when
any part of the solar cell is blocked by
clothing, etc.
• You should try to keep the watch outside of
your sleeve as much as possible. Charging
is reduced significantly if the face is
covered only partially.
Solar cell
E-41
E-43
E-44
Important!
• 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 rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
possible.
• This watch uses a rechargeable battery to store power produced by the solar cell, so
regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the rechargeable battery to charge fully, contact your dealer or
CASIO distributor about having it replaced.
• Never try to remove or replace the watch’s rechargeable battery yourself. Use of the
wrong type of battery can damage the watch.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 5 (pages E-47 and E-48) and when you have the
battery replaced.
• Turn on the watch’s Power Saving function (page E-69) and keep it in an area
normally exposed to bright light when storing it for long periods. This helps to keep
the rechargeable battery from going dead.
E-46
• The flashing indicator at Level 3 tells you that battery power is very low, and
that exposure to bright light for charging is required as soon as possible.
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 after falling to Level 5, reconfigure the
current time, date, and other settings.
• The watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery drops to Level 5. With this Home City code setting, the watch is
configured to receive the time calibration signals of Japan. If you are using the watch
in North America or Europe, or China you will need to change the Home City code
setting to match your location whenever the battery drops to Level 5.
•
Display indicators reappear as soon as the battery is charged from Level 5 to Level 2.
• Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading temporarily that is higher
than the actual battery level. The correct battery level should be indicated after a few
minutes.
E-48
Battery Power Indicator and Recover Indicator
In the Timekeeping Mode, press B to enter the Battery/Receive Mode.
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
5
Recover indicator
Battery Power Indicator
(Charge Soon Alert)
• Performing illumination, or beeper operations during a
short period may cause
display.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
• If
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
All functions enabled.
All functions enabled.
Watch enters Timekeeping Mode and second
hand jumps every two seconds. Auto and manual
receive, illumination, and beeper disabled.
All hands stop at 12 o’clock, all functions and
display indicators disabled.
All functions disabled.
(recover) appears frequently, it probably means
Function Status
(recover) to appear on the
E-45
E-47
E-49
Operation Guide 5161
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery 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
E-50
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
E-52
To set the time and date manually
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours 16 hours 5 hours
4 hours 58 hours 16 hours
7 hours 94 hours 26 hours
76 hours - - - - - - - - - - - - - - - -
1. In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
• The second hand will move to 12 o’clock and stop
there.
2. Press C to toggle between 12-hour (12H) and 24-hour
(24H) timekeeping.
3. Press B and the city code of the current Home City will
flash on the display.
4. Use C to select the city code you want.
• Make sure you select your Home City code before
changing any other setting.
• For full information on city codes, see the “City Code
Table” at the back of this manual.
▲
▲
Charging Guide
The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifications (page E-78).
• Stable operation is promoted by frequent exposure to light.
Approximate
Exposure Time
8 minutes
30 minutes
48 minutes
8 hours
E-51
Timekeeping
Read This Before You Set the Time and Date!
This watch is preset with a number of city codes, each of which represents the time
▲
zone where that city is located. When setting the time, it is important that you first
select the correct city code for your Home City (the city where you normally use the
watch). If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.
• Note that all of the times for the World Time Mode city codes (page E-32) are
displayed in accordance with the time and date settings you configure in the
Timekeeping Mode.
• The watch automatically adjusts its analog setting to match the current digital setup
of your Home City. If the analog time is not correct even though you are sure the
digital setup of your Home City is correct and the watch is performing signal
reception properly, check the home positions of the hands and make adjustments if
necessary (page E-63).
5. Press B to move the flashing in the sequence shown below to select the other
settings.
12/24-Hour
Forma t
Language
• The following steps explain how to configure timekeeping settings only.
6. When the timekeeping setting you want to change is flashing, use C to change it
as described below.
Screen:
City Code
Operation Tone
To do this: Do this:
Toggle between 12-hour (
hour ( ) timekeeping
Change the city code
Button
DST
Seconds
Day
Month
) and 24-
Hour
Minutes
Ye a r
Press C.
E-53
E-54
Screen: To do this: Do this:
E-56
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) include 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 signals.
• Though the time calibration signals transmitted by the Fukushima and Fukuoka/
Saga, Japan transmitters include summer time data, summer time currently is not
implemented in Japan (as of 2010).
• The default DST setting is Auto DST (
TYO, ANC, LAX, DEN, CHI, or NYC as your Home City code.
• If 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-58
Cycle between Auto DST ( ), Daylight
Saving Time (
( ).
Reset the seconds to
Change the hour and minutes
Change the year, month, or day
Toggle the button operation tone between
/
(on) and (off)
Change the language of the day of the week
: English : Germ an : Spanish
: Chinese : Japanese
) and Standard Time
) whenever you select LON, PAR , ATH ,
Press C.
E-55
7. Press A to exit the setting screen.
• Auto DST (
DEN, CHI,orNYC is selected as the Home City code. For more information, see
“Daylight Saving Time (DST)” below.
• The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
12-hour and 24-hour timekeeping
• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and no indicator appears to the left of the
hour digits for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
To change the Daylight Saving Time (summer time) setting
DST indicator
AT (AUTO)
This setting causes the watch to switch between standard time and summer time
automatically, in accordance with time calibration signal data. This setting is
available only when a city code that supports signal reception is selected as the
Home City.
) can be selected only while LON, PAR , ATH, TYO, HNL, ANC, LAX,
1. In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
2. Press B twice to enter the Daylight Saving Time
setting mode.
3. Use C to cycle through the DST settings in the
sequence shown below.
Auto DST ( ) DST off ( ) DST on ( )
E-57
E-59
Operation Guide 5161
OFF
This setting turns off summer time, and displays the current time normally.
ON
This setting turns on summer time. Tur ning on summer time advances the current
time by one hour.
• If you change your Home City to one that is within the same transmitter area, the
current DST setting will be retained. If you change to a city that is outside your
current transmitter area, DST will be turned off automatically.
Transmitter
Japan
China
U.S.
Europe (U.K., Germany)
None
E-60
• Depending on how much the hands have to move in order to adjust to the digital
time, it may take some time before they stop moving.
E-62
To adjust home positions
Correct second hand
position
E-64
Covered City Codes
TYO
HKG
HNL, ANC, LAX, DEN, CHI, NYC
LON, PAR , AT H,
All other city codes
1. In the Timekeeping Mode, hold down A for about six
seconds. You can release the button after “H-SET”
appears on the display.
• Though “ADJ” will appear on the display after about
three seconds, do not release the button yet. Keep it
depressed until “H-SET” appears.
• The second hand should move to 12 o’clock (its home
position), and “SEC 00” will flash on the display.
• If the second hand does not point to 12 o’clock, use
the C button to adjust it. Each press of C advances
the hand by one second.
4. When the setting you want is selected, press A to exit the setting screen.
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
Analog Timekeeping
The analog time of this watch is synchronized with the digital time. The analog time
setting is adjusted automatically whenever you change the digital time.
Note
• The hands for the analog timepiece move to adjust to a new setting whenever any of
the following occurs.
When you change the digital time setting manually
When the digital time setting is changed by time calibration signal reception
When you change the Home City code and/or DST setting
• If the analog time does not match the digital time for any reason, use the procedure
described under “To adjust home positions” (page E-64) to match the analog setting
to the digital setting.
• Whenever you need to adjust both the digital and the analog time settings manually,
make sure you adjust the digital setting first.
E-61
Adjusting Home Positions
Strong magnetism or impact can cause the hands 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 analog time and digital time are
the same in the Timekeeping Mode.
• Holding down the C button during the adjustment procedures in this section will
cause the applicable hand to start high-speed hand movement. Once started, highspeed hand movement will continue even if you release the C button. To stop highspeed hand movement, press any button.
E-63
2. After the second hand is in the proper home position,
press B.
•
The hour and minute hands should move to 12 o’clock
(their home position), and “+0:00” will flash on the display.
3. What you should do next depends on whether the hour
and minute hands are to the left or to the right of
12 o’clock.
■ If the hands point to 12 o’clock
Correct hour and
minute hand positions
■ If the hands point to the right of 12 o’clock
Press B, which will cause the flashing display to change to “–0:00”. Next, use
the C button to move the hands counterclockwise until they point to 12 o’clock.
• Each press of C moves the hands 10 seconds.
Go to step 4 of this procedure.
■ If the hands point to the left of 12 o’clock
Use the C button to move the hands clockwise until
they point to 12 o’clock.
• Each press of C moves the hands 10 seconds.
E-65
4. After everything is the way you want, press A to return to the Timekeeping Mode.
• After performing home position adjustment, enter the Timekeeping Mode and check
to make sure that the analog hands and the digital display indicate the same time. If
they do not, perform home position adjustment again.
E-66
To turn the button operation tone on and off
E-68
1. In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
2. Press B nine times until the current button operation
tone setting (
3. Press C to toggle the setting between
on) and
4. Press A to exit the setting screen.
or ) appears.
(tone off).
(tone
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.
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.
• Even if you turn off the button operation tone, alarms, the Hourly Time Signal, and
other beepers all operate normally.
Power Saving Function
Elapsed Time
in Dark
60 to 70 minutes
6 or 7 days
When turned on, the Power Saving function enters a sleep
state automatically whenever the watch is left in an area
for a certain period where it is dark. The table below
shows how watch functions are affected by the Power
Saving function.
Blank
Blank
Display
Second hand moves to 12 o’clock
and stops, all functions enabled,
display blank.
All hands stop at 12 o’clock. Auto
receive, beeper tone, illumination,
and display are disabled.
Operation
E-67
E-69
Operation Guide 5161
• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
• The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch
is already in the sleep state when 6:00 AM arrives, however, it will remain in the
sleep state.
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area.
• Press any button.
Radio-controlled Atomic Timekeeping Precautions
• Strong electrostatic charge can result in the wrong time being set.
• The time calibration signal bounces 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.
E-70
• The Home City setting reverts to the initial default of TYO (Tokyo) whenever the
battery power level drops to Level 5 or when you have the rechargeable battery
replaced. If this happens, change the Home City to the setting you want (page E-12).
Transmitters
The time calibration signal received by this watch depends on the currently selected
Home City code (page E-12).
• When a U.S. time zone is selected, the watch receives the time calibration signal
transmitted from the United States (Fort Collins).
• When a Japanese time zone is selected, the watch receives the time calibration
signal transmitted from Japan (Fukushima and Fukuoka/Saga).
• When a European time zone is selected, the watch receives the time calibration
signals transmitted from Germany (Mainflingen) and England (Anthorn).
• When a China time zone is selected, the watch receives the time calibration signals
transmitted from China (Shangqiu City).
E-72
Initial Screens
When you enter the World Time Mode or Alarm Mode, the data you were viewing
when you last exited the mode appears first.
Timekeeping
• Resetting 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.
• The year can be set in the range of 2000 to 2099.
• 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 battery replaced.
• The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Coordinated Universal Time (UTC) for each city,
based on your Home City time setting.
• Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
• The current time setting in accordance with the time calibration signal takes priority
over any time settings you make manually.
• The 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 the time
calibration signal cannot be performed starting from January 1, 2100.
• This watch can receive signals that differentiate between leap years and non-leap
years.
• Though 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.
• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps the time with the precision noted in “Specifications”.
• If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code, and DST
(summer time) settings (page E-54), and auto receive settings (page E-27).
E-71
• When your Home City is LON, PAR , ATH (which can receive both the Anthorn and
Mainflingen signals), the watch first tries to pick up the signal it last successfully
received. If that fails, it tries the other signal. For the first receive after you select your
Home City, the watch tries the nearest signal first (Anthorn for LON, Mainflingen for
PAR and AT H).
• When your Home City is TYO (which can receive both 40 kHz and 60 kHz signals),
the watch first tries to pick up the signal it last successfully received. If that fails, it
tries the other signal.
Auto Return
If you do not perform any operation for about two or three minutes while a setting
screen (with a flashing setting) is on the display, the watch will exit the setting screen
automatically.
Scrolling
The C button is used in various modes and setting screens to scroll through data on
the display. In most cases, holding down this button during a scroll operation scrolls at
high speed.
World Time
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
Illumination Precautions
An LED (light-emitting diode) and a light guide panel illuminate the face of the watch
for easy reading in the dark. In any mode, press A to illuminate the face of the watch
for about one second.
• The illumination provided by the light may be difficult to see when viewed under
direct sunlight.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination shortens the battery operating time.
E-73
E-74
Specifications
Accuracy at normal temperature: ± 15 seconds a month
Digital Timekeeping: Hour, minutes, seconds, a.m./p.m. (P), day, day of the week
Time system: Switchable between 12-hour and 24-hour formats
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); Daylight Saving
Time (summer time)/Standard Time
Analog Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds
Time Calibration Signal Reception: Auto receive 6 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: Mainflingen, Germany (Call Sign: DCF77,
Frequency: 77.5 kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0
kHz); Fort Collins, Colorado, the United States (Call Sign: WWVB, Frequency:
60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0 kHz); Fukuoka/
Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Shangqiu City, Henan
Province, China (Call Sign: BPC, Frequency: 68.5 kHz)
E-76
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 4 months (from full charge to Level 4) under
the following conditions:
• Watch not exposed to light
• Internal timekeeping
• Display on 18 hours per day, sleep state 6 hours per day
• 1 illumination operation (1.5 second) per day
• 10 seconds of alarm operation per day
• Approximately 4 minutes of signal reception per day
E-78
E-75
World Time: 29 cities (29 time zones)
Other: Daylight Saving Time/Standard Time
Alarms: 5 daily alarms; Hourly Time Signal
Stopwatch:
Measuring unit: 1/100 seconds
Measuring capacity: 59' 59.99''
Measuring mode: Elapsed time
Countdown Timer:
Measuring unit: 1 second
Input range: 1 minute to 100 minutes (1-minute increments)
Illumination: LED (light-emitting diode)
Other: Power Saving, Battery power indicator, Button operation tone on/off, day of the
week language selection
E-77
Operation Guide 5161Operation Guide 5161
City Code Table
City
City
Code
Pago Pago
PPG
Honolulu
HNL
Anchorage
ANC
Los Angeles
LAX
Denver
DEN
Chicago
CHI
New York
NYC
Santiago
SCL
Rio De Janeiro
RIO
Praia
RAI
UTC
London
LON
Paris
PAR
L
UTC Offset/
GMT Differential
–11
–10
–9
–8
–7
–6
–5
–4
–3
–1
0
+1
City
Code
ATH
JED
THR
DXB
KBL
KHI
DEL
KTM
DAC
RGN
BKK
HKG
TYO
City
Athens
Jeddah
Teh r a n
Dubai
Kabul
Karachi
Delhi
Kathmandu
Dhaka
Yangon
Bangkok
Hong Kong
Tokyo
UTC Offset/
GMT Differential
+2
+3
+3.5
+4
+4.5
+5
+5.5
+5.75
+6
+6.5
+7
+8
+9
City
City
Code
Adelaide
ADL
Sydney
SYD
NOU
Noumea
WLG
Wellington
• Based on data as of December 2009.
• The rules governing global times (UTC offset and GMT differential) and summer
time are determined by each individual country.
UTC Offset/
GMT Differential
+9.5
+10
+11
+12
L-1
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