Casio 4361 User manual

Operation Guide 4361
1
MO0602-EA
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.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch where
it is not exposed to light causes the battery to run down.
Make sure the watch is exposed to light as much as possible.
• When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright light.
•You should try to keep the watch outside of your sleeve
as much as possible. Charging is reduced significantly if
the face is only partially covered.
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Bright Light
Solar cell
Battery charges in the light. Battery discharges in the dark.
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Charge
Rechargeable battery
Bright Light
Electrical
energy
Solar cell
(Converts light to
electrical power.)
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Some or all
functions
disabled
Dis-
charge
•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.
•The actual level at which some functions are disabled depends on the watch model.
•Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fluorescent lighting
•Be sure to read “Power Supply” for important information you need to know
when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
•See “Power Saving Function” for more information.
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.
•Most of the display examples in this manual show only
the digital display, without the analog hands.
•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.
▲
▲
▲
Stopwatch ModeCountdown Timer Mode
Alarm Mode
▲
Timekeeping Mode Press C.
▲
▲
World Time Mode
Hand Setting Mode
General Guide
•Press Cto change from mode to mode.
•In any mode (except when a setting screen is on the display), press Bto illuminate
the face of the watch.
Radio-controlled Timekeeping
This watch receives a time calibration signal and updates
its time setting accordingly. The time calibration signal
includes both Standard Time and Daylight Saving Time
(summer time) data.
•This watch is designed to pick up the time calibration
signal transmitted from Mainflingen, Germany and the
signal from Rugby, England.
Seconds
Minute hand
Hour hand
Month – Day
Current Time Setting
This watch automatically adjusts its time setting in accordance with a time calibration
signal. You can also perform a manual procedure to set the time and date, when
necessary.
•The first thing you should do after purchasing this watch is to set your Home City,
which is the city where you will normally use the watch. For more information, see
“To set your Home City” below.
•When using the watch outside the ranges of the time signal transmitter, you have to
adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time setting.
•The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is automatically adjusted whenever you change the digital
setting. See “Analog Timekeeping” for more information.
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To set your Home City
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Use D(east) and B(west) to scroll through the city
codes until the one you want to use as your Home City
is displayed.
•The following are the city codes for major cities in the
Western Europe time zones.
City code
City
Lisbon
London
Barcelona Madrid
Paris
Milan Rome
Berlin
Stockholm
Athens
City Code
LIS
LON
BCN, MAD
PA R
MIL, ROM
BER
STO
AT H
Other major cities in same time zone
Dublin, Casablanca, Dakar,
Abidjan
Amsterdam, Algiers, Hamburg,
Frankfurt, Vienna
Helsinki, Istanbul, Beirut,
Damascus, Cape Town
•If you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting.
To display the digital time and last signal screen
•In the Timekeeping Mode, press Ato cycle through the digital time screens as
shown below.
•In the Timekeeping Mode, press Dto display the last signal screens as shown
below. The last signal screen shows the time and date of the last successful time
calibration signal reception.
Last Signal
Screen
Reception date
▲
Press A.
Hour : Minutes
Seconds
Day of week PM indicator
DST indicator
▲
Press A.
Reception time
Month –Day
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 five or
six times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
•Manual Receive
Manual receive lets you start a time calibration signal reception with the press of a
button. For more information, see “To perform manual receive”.
Important!
•When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
•The watch should not be on its side or facing the wrong way.
Resin Band Metal Band
3. Press Ato 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 (in
the middle of the night). You can also perform manual receive or you can set the time
manually.

Operation Guide 4361
2
•Proper signal reception can be difficult or even impossible under the conditions listed
below.
•Signal reception is normally better at night than during the day.
•Time calibration signal reception takes from two to seven minutes, but in some
cases it can take as long as 14 minutes.Take care that you do not perform any
button operations or move the watch during this time.
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
•When within range of the applicable transmitter, this watch can receive either the
Germany (Mainflingen) or England (Rugby) time calibration signals.
See “Transmitters”for more information.
•This watch is designed to receive the time calibration signal transmitted from
Mainflingen, Germany and the signal from Rugby, England. Signal reception is
possible within the area represented by a circle with a radius of about 1,500
kilometers.
Rugby
Mainflingen
1,500 kilometers
500 kilometers
•At distances further than about 500 kilometers from a transmitter, signal reception
may not be possible during certain times of year or times of day. Radio interference
may also cause problems with reception.
•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 Receive Troubleshooting”if you experience
problems with time calibration signal reception.
About Auto Receive
With auto receive, the watch receives the time calibration signal automatically five or
six times a day. When the second or third receive is successful, the remaining auto
receive operations are not performed. The reception schedule (calibration times)
depends on your currently selected Home City Code, and whether standard time or
Daylight Saving Time is selected for your Home City Code.
Note
•Auto receive is turned on whenever LIS, LON, BCN, MAD, PAR, MIL, ROM,
BER, STO, or ATH is selected as the Home City code.
Your City Code Auto Receive Start Times
1234 5 6
LIS, LON Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight
(GMT +0) Daylight Saving
2:00 am 3:00 am 4:00 am 5:00 am Midnight 1:00 am
Time next day
Standard Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight 1:00 am
next day
Daylight Saving 3:00 am 4:00 am 5:00 am Midnight 1:00 am 2:00 am
Time next day next day
ATH Standard Time 3:00 am 4:00 am 5:00 am Midnight 1:00 am 2:00 am
(GMT +2) next day next day
Daylight Saving 4:00 am 5:00 am Midnight 1:00 am 2:00 am 3:00 am
Time next day next day next day
BCN, MAD
PAR, MIL
ROM, BER
STO
(GMT +1)
Note
•Auto receive works only while the watch is in the Timekeeping Mode or World Time
Mode. Auto receive is not performed if an auto receive time is reached while an
alarm is sounding, while a countdown timer operation is in progress, or if a setting
screen (a screen with a flashing setting) is on the display.
•Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can receive the signal easily.
•When auto receive is turned on, the watch receives the calibration signal for two to
six minutes everyday when the Timekeeping Mode time reaches each of the
calibration times. Do not perform any button operation within six minutes before or
after any one of the calibration times. Doing so can interfere with correct calibration.
•Remember that reception of the calibration signal depends on the time kept 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
Timekeeping Mode time is actually the correct time.
•If more than one auto receive is successful, the watch uses the data from the last
successful receive to adjust settings. When only one reception is successful, the
watch uses the data of the successful reception.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Receiving indicator
Weak Strong
(Level 0) (Level 3)
•Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
•Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal reception.
•Following reception of the time calibration signal and calibration of the watch’s time
setting, the Level 3 receiving indicator will remain on the display in all modes. The
Level 3 receiving indicator will not be displayed if signal reception was unsuccessful
or after you adjust the current time setting manually.
•The Level 3 receiving indicator remains on the display in all modes following
reception of the time calibration signal and calibration of the watch’s time setting.
The Level 3 receiving indicator is not displayed if signal reception was unsuccessful
or after manual adjustment of the current time setting.
•The Level 3 receiving indicator indicates that at least one of the five calibration
signal receive operations was successful. Note, however, that the Level 3 receiving
indicator is cleared from the display each day when the first auto receive operation
of the day is performed.
To perform manual receive
1. Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
2. In the Timekeeping Mode, hold down Dfor about two
seconds until the watch beeps.
3. After you release Dthe display will show the current
time and the letters RC!. This indicates that signal
reception is in progress.
•Time calibration signal reception normally takes from two to seven minutes.Take
care that you do not perform any button operations or move the watch during this
time.
•After signal reception is complete, the display of the watch changes to the last signal
screen.
Note
•To interrupt a reception and return to the Timekeeping Mode, press D.
•If reception is unsuccessful, the message ERR appears on the display for one or
two minutes. After that, the watch returns to the Timekeeping Mode.
•You can also change from the last signal or ERR screen to the normal timekeeping
screen by pressing D.
•Calibration signal reception is disabled while a countdown timer operation is in
progress.
To turn auto receive on and off
1. In the Timekeeping Mode, press Dto display the last
signal screen.
•
The watch will automatically return to the Timekeeping
Mode if you do not perform any button operation for one
or two minutes after displaying the last signal screen.
2. Hold down Auntil the current auto receive setting
flashes on the display. This is the setting screen.
•If the auto receive setting does not appear when you
hold down A, it means that the city code currently
selected for the Home City is for an area that does not
support calibration signal reception. You cannot turn
auto receive on or off in this case.
3.
Use D to turn auto receive on (ON) or off (OFF).
4. Press Ato exit the setting screen.
•To return to the Timekeeping Mode from the last signal screen, press D.
•For information about city codes that support signal reception, see “To set your
Home City”.
On/Off status
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 3
receiving
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
Probable Cause
• The watch is not in the Timekeeping Mode.
•Your current Home City is not one of the
following city codes: LIS, LON,
BCN, MAD, PAR, MIL, ROM,
BER, STO, or ATH.
•You changed the time setting manually.
•The watch was not in the Timekeeping
or World Time Mode, or you performed
some button operation during the auto
receive operation.
• Even if receive is successful, the Level 3
receiving indicator disappears from
the display each day when the first auto
receive operation of the day is
performed.
•Time data (hour, minutes, seconds) only
was received during the last receive
operation. The Level 3 receiving
indicator appears only when time data
and date data (year, month, day) are
both received.
•If the time is one hour off, the DST
setting may be incorrect.
•The Home City code setting is not
correct for the area where you are using
the watch.
What you should do
•Enter the Timekeeping Mode
and try again.
•Select LIS, LON, BCN,
MAD, PAR, MIL, ROM,
BER, STO, or ATH as your
Home City.
•Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
•Check to make sure the
watch is in a location where it
can receive the signal.
•Change the DST setting to
Auto DST.
•Select the correct Home City
code.
•For further information, see “Important!”under “Time Calibration Signal Reception”
and “Radio-controlled Timekeeping Precautions”.

Operation Guide 4361
3
To view the time in another city
While in the World Time Mode, press Dto scroll through the city codes (time zones)
to the east.
•For full information on city codes, see “City Code Table”.
To toggle a city code time between Standard Time and Daylight Saving Time
1. In the World Time Mode, use Dto display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down Ato toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator
not displayed).
DST indicator
•Note that you cannot use the World Time Mode to change the DST setting of the
Home City code you currently have selected in the Timekeeping Mode. See “To
change the Daylight Saving Time (summer time) setting”for information about
turning the Home City code DST setting on and off.
•The DST indicator will appear on the display whenever you display a city code for
which Daylight Saving Time is turned on.
•Note that the DST/Standard Time setting affects only the currently displayed city
code. Other city codes are not affected.
Countdown Timer
You can set the countdown timer within a range of one to
60 minutes. An alarm sounds when the countdown
reaches zero.
•Calibration signal reception (both auto and manual) is
disabled while a countdown timer operation is in
progress.
•All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
Minutes
Seconds
1/10 Seconds
To set the countdown start time
1. While the countdown start time is on the display in the Countdown Timer Mode,
hold down Auntil the current countdown start time starts to flash, which indicates
the setting screen.
•If the countdown start time is not displayed, use the procedure under “To use the
countdown timer”to display it.
2. While a setting is flashing, use D(+) and B(–) to change it.
3. Press Ato exit the setting screen.
To use the countdown timer
Press Dwhile in the Countdown Timer Mode to start the countdown timer.
•When the end of the countdown is reached, the alarm sounds for 10 seconds or until
you stop it by pressing any button. The countdown time is automatically reset to its
starting value after the alarm stops.
•Press Dwhile a countdown operation is in progress to pause it. Press Dagain to
resume the countdown.
•To completely stop a countdown operation, first pause it (by pressing D), and then
press A. This returns the countdown time to its starting value.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
•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.
•Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
•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 C.
1/100 second
Minutes
Seconds
D
Start Stop
Elapsed Time
➤
Re-start Clear
D➤
Stop
D➤D➤A
Split Time
D
Start Split
➤
Split release Clear
A➤
Stop
A➤D➤A
Two Finishes
D
Start Split
➤
Stop Clear
A➤
Split release
D➤A➤A
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
To measure times with the stopwatch
( displayed)
Alarm
When the alarm is turned on, the alarm sounds when the
alarm time is reached. You can also turn on an Hourly
Time Signal, which will cause the watch to beep twice
every hour on the hour.
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm time
(Hour : Minutes)
PM indicator
Hourly time signal
on indicator
Alarm on indicator
To set the alarm time
1. In the Alarm Mode, hold down Auntil the hour setting of the alarm time starts to
flash, which indicates the setting screen.
•This operation automatically turns on the alarm.
2. Press Cto move the flashing between the hour and minute settings.
3. While a setting is flashing, use D(+) and B(–) to change it.
•When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (PM indicator).
4. Press Ato exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds, regardless of the mode the
watch is in.
•To stop the alarm tone after it starts to sound, press any button.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn the Daily alarm and the Hourly Time Signal on and off
In the Alarm Mode, press Dto cycle through the settings shown below.
•The alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.
Alarm Off
Signal Off
Alarm On
Signal Off
Alarm Off
Signal On
Alarm On
Signal On
Alarm On Indicator / Hourly Time Signal On Indicator
Illumination
An LED (light-emitting diode) and light guide panel
illuminate the digital display for easy reading in the dark.
•See “Illumination Precautions”for other important
information.
To turn on illumination
In any mode (except when a setting is on the display),
press Bto illuminate the display.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. This section
also explains how to manually set the current date and time.
•When setting the time, you can also configure settings for the illumination duration
and the 12/24-hour format.
•All of the operations in this section are performed in the Timekeeping Mode, which
you can enter by pressing C.
▲
Press A.
Hour : Minutes
▲
Press A.
Seconds
Day of week PM indicator
DST indicator
Month –Day
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Setting the Digital Time and Date Manually
Make sure you select your Home City code before you change the current time and
date settings. World Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, World Time Mode times will not be
correct if you do not select the proper Home City code before setting the time and
date in the Timekeeping Mode.
To set the current digital time and date manually
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cto move the flashing in the sequence shown
below to select other settings.
City code
Seconds Hour
12/24-Hour
Format
Minutes
Year
DST
Day Month
City Code
Power
Saving
World Time
The World Time Mode digitally displays the current time in
48 cities (29 time zones) around the world.
•If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
•The watch will perform a signal reception even if it is in
the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
•All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
City code
Current time in
selected city

Operation Guide 4361
4
3. When the setting you want to change is flashing, use Band/or Dto change it as
described below.
Screen: To do this:
Change the city code
Cycle between Daylight Saving Time
(), Standard Time ( ), and Auto
DST ( )
Toggle between 12-hour (12H) and
24-hour (24H) timekeeping
Do this:
Use D(east) and B(west).
Press D.
Press D.
Reset the seconds to
Change the hour or minutes
Change the year
Change the month or day
Toggle Power Saving on ( ) and off
()
Press D.
Press B.
Use D(+) and B(–).
Press D.
•See “City Code Table”for a complete list of available city codes.
•Auto DST ( ) can be selected only while LIS, LON, BCN, MAD, PAR, MIL,
ROM, BER, STO, or ATH is selected as the Home City code. For more
information, see “Daylight Saving Time (DST)”below.
•For information about settings other than the time and date, see the following.
Power Saving: Power Saving Function
4. Press Ato exit the setting screen.
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 and Rugby includes both
Standard Time and DST data. When the Auto DST setting is turned on, the watch
switches between Standard Time and DST (summer time) automatically in
accordance with the Mainflingen and Rugby signals.
•The default DST setting is Auto DST ( ) whenever you select LON, PAR, BER,
or ATH as your Home City code.
•If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight Saving Time (summer
time) manually.
To change the Daylight Saving Time (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the city code starts to flash, which
indicates the setting screen.
2. Press Conce and the DST setting screen appears.
3. Use Dto cycle through the DST settings in the sequence shown below.
4. When the setting you want is selected, press Ato exit the setting screen.
•The DST indicator ( ) appears on the display to indicate that Daylight Saving Time
is turned on.
Auto DST ( ) DST off ( ) DST 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 the analog time”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.
•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.
To adjust the analog time
1. In the Timekeeping Mode, press Cfive times to enter
the Hand Setting Mode.
2. Hold down Auntil the current digital time starts to
flash, which indicates the setting screen.
3. Use Dand Bto adjust the analog setting as
described below.
When you want to do this:
Move the hand setting
forward 20 seconds
Move the hand setting a short
way forward at high speed
Perform this button operation:
•Press D.
•Hold down D.
•Release Dwhen the hands reach the setting
you want.
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Move the hand setting a long
way forward at high speed
•While holding down Dto move the hands at
high speed, press Bto lock the high-speed
hand movement.
•To stop the hand movement, press any
button.
•Hand movement stops automatically if the hour
hand makes one full (12-hour) revolution.
4. Press Ato exit the setting screen.
•The minute hand will be adjusted slightly to match the seconds when you exit the
setting screen.
•To return to the Timekeeping Mode, press C.
Power Supply
This watch is equipped with a solar cell and a special rechargeable battery (secondary
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 only partially
covered.
Solar cell
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. Make sure that the watch is normally exposed to bright light
whenever possible.
•This watch uses a special 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 special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
•Never try to remove or replace the watch’s special 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 and when you have the battery replaced.
•Turn on the watch’s Power Saving function 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.
Battery Power Indicator and Recover Indicator
The battery power indicator shows you the current power level of the rechargeable
battery.
Battery power indicator
Recover indicator
Function Status
All functions enabled.
All functions enabled.
Alarm, hourly time signal
and illumination disabled.
All functions disabled.
Display disabled and
initialized.
Level
1
2
3
4
5
Battery Power Indicator
(Charge Soon Alert)
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(Charge Soon Alert)
• The LOW indicator flashes on the display in the Timekeeping Mode when battery is at Level 3.
•The LOW indicator at Level 3 and the flashing charge indicator (CHG) at Level 4 tell
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. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 4
(indicated by the flashing charge indicator) from Level 5.You will not be able to
configure any of the other settings until the battery reaches Level 3 (no charge
indicator) after dropping to Level 5.
•
Leaving the watch in direct sunlight or some other very strong light source can cause the
battery power indicator to show a reading that is momentarily higher than the actual
battery level. The correct battery power indicator should appear after a few minutes.
•If you use the light or alarms a number of times during a short period, the recover
indicator ( ) appears and the following operations become disabled until battery
power recovers.
Illumination
Beeper tone
After some time, battery power will recover and the recover indicator will disappear,
indicating that the above functions are enabled again.
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
Charging Guide
After a full charge, timekeeping remains enabled for up to about 6 months.
•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.
•Since these are the specs, we can include all the technical details.
•Display on 18 hours per day, sleep state 6 hours per day
•1 illumination operation (1.5 seconds) per day
•10 seconds of alarm operation per day
•16 minutes of signal reception per day
•Stable operation is promoted by frequent exposure to light.
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)
Approximate Exposure Time
8 minutes
30 minutes
48 minutes
8 hours

Operation Guide 4361
5
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
•The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
–––
5 hours
18 hours
30 hours
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)
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours
6 hours
9 hours
99 hours
21 hours
80 hours
129 hours
▲ ▲ ▲ ▲ ▲
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.
Power Saving Function
When turned on, the Power Saving function enters a sleep
state automatically whenever the watch is left in an area
where it is dark for a certain period. The table below
shows how watch functions are affected by the Power
Saving function.
Power saving
indicator
Elapsed Time
in Dark
60 to 70 minutes
6 or 7 days
Display
Blank, with Sleep indicator ( )
flashing
Blank, with Sleep indicator ( )
not flashing
Operation
All functions enabled, except
for the display
Beeper tone, illumination, and
display are disabled.
•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.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cnine times until the Power Saving on/off
screen appears.
3. Press Dto toggle Power Saving on ( ) and off ( ).
4. Press Ato exit the setting screen.
•The Power Saving indicator ( ) is on the display in all
modes while Power Saving is turned on.
Button Operation Tone
In any mode (except when a setting screen is on the display), hold down Cfor about
three seconds to toggle the button operation tone on and off. The button operation
tone off indicator ( ) is displayed while the tone is turned off.
•Even if the button operation tone is turned off, the daily alarm and countdown timer
alarm continue to sound when required.
ON/Off status
Auto Return Features
•If you leave the watch in the Alarm or Hand Setting Mode for two or three minutes
without performing any operation, it automatically returns to the Timekeeping Mode.
•If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
Scrolling
The Band Dbuttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Initial Screens
When you enter the World Time Mode, the data you were viewing when you last exited
the mode appears first.
Radio-controlled Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time being set.
•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.
•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.
•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 automatically update the date and day of the week 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.
•Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows the date as kept in the Timekeeping Mode at
the time of signal reception.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±15 seconds a month at normal temperature.
•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, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.
Setting
City code
DST (summer time)
Auto receive
Initial Factory Default
(Berlin)
(Auto switching)
(Auto receive)
Transmitters
This watch is designed to receive the time calibration signal transmitted from
Mainflingen, Germany and the signal from Rugby, England. You can configure the
watch to automatically select the transmitter that has the strongest signal.
In this case:
The first signal auto search operation
after factory default settings are in effect,
or after the city code has been changed.
Any case other than the above.
The watch does this:
1. Checks the Mainflingen signal first.
2. If the Mainflingen signal cannot be
received, checks the Rugby signal.
1. Checks the last successfully received
signal first.
2. If the last successfully received signal
cannot be received, checks the other
signal.
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 day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
•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 or when battery power drops to
Level 5.
•The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
•The times for the Timekeeping Mode and all the city codes of the World Time Mode
are calculated in accordance with each city’s UTC differential.
•The UTC differential is a value that indicates the time difference between a
reference point in Greenwich, England and the time zone where a city is located.
•The letters “UTC”is the abbreviation for “Universal Time Coordinated”, which is the
world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s
rotation.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.
•With the 12-hour format, the PM indicator (PM) appears on the display for times in
the range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
•With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
Illumination Precautions
•Illumination may be hard to see when viewed under direct sunlight.
•Illumination automatically turns off whenever an alarm sounds.
•Frequent use of illumination runs down the battery.

Operation Guide 4361
6
Pago Pago
Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
Mexico City
Winnipeg
Chicago
Miami
Toronto
New York
Caracas
Halifax
St. Johns
Rio De Janeiro
Praia
City City GMT Other major cities in same time zone
Code Differential
City Code Table
PPG
HNL
ANC
YVR
LAX
YEA
DEN
MEX
YWG
CHI
MIA
YTO
NYC
CCS
YHZ
YYT
RIO
RAI
–11.0
–10.0
–09.0
–08.0
–07.0
–06.0
–05.0
–04.0
–03.5
–03.0
–01.0
Papeete
Nome
San Francisco, Las Vegas,
Seattle/Tacoma, Dawson City, Tijuana
El Paso, Culiacan
Houston, Dallas/Fort Worth, New Orleans
Montreal, Detroit, Boston,
Panama City, Havana, Lima, Bogota
La Paz, Santiago, Port Of Spain
Sao Paulo, Buenos Aires, Brasilia, Montevideo
Lisbon
London
Barcelona
Madrid
Par is
Milan
Rome
Berlin
Stockholm
Athens
Cairo
Jerusalem
Moscow
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
+00.0
+01.0
+02.0
+03.0
+03.5
+04.0
+04.5
+05.0
+05.5
Dublin, Casablanca, Dakar, Abidjan
Amsterdam, Algiers, Hamburg, Frankfurt, Vienna
Helsinki, Istanbul, Beirut, Damascus,
Cape Town
Kuwait, Riyadh, Aden, Addis Ababa, Nairobi
Shiraz
Abu Dhabi, Muscat
Male
Mumbai, Kolkata
LIS
LON
BCN
MAD
PA R
MIL
ROM
BER
STO
ATH
CAI
JRS
MOW
JED
THR
DXB
KBL
KHI
DEL
Dhaka
Yangon
Bangkok
Hong Kong
Seoul
Tokyo
Adelaide
Guam
Sydney
Noumea
Wellington
+06.0
+06.5
+07.0
+08.0
+09.0
+09.5
+10.0
+11.0
+12.0
Colombo
Jakarta, Phnom Penh, Hanoi, Vientiane
Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,
Ulaanbaatar
Pyongyang
Darwin
Melbourne, Rabaul
Port Vila
Christchurch, Nadi, Nauru Island
DAC
RGN
BKK
HKG
SEL
TYO
ADL
GUM
SYD
NOU
WLG
•Based on data as of June 2005.