MO0905-EA
Operation Guide 3179
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.
• The actual level at which some functions are disabled depends on the watch model.
• Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately about 8 hours exposure to indoor fluorescent lighting
• Be sure to read “Power Supply” for important information you need to know
when exposing the watch to bright light.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
Bright Light
stored by a rechargeable battery. Leaving or using the
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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.
Solar cell
• 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.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
• See “Power Saving Function” for more information.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage
or loss suffered by you or any third party arising through the use of this product or
its malfunction.
• 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.
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.
Battery charges in the light.
Battery discharges in the dark.
Bright Light
Solar cell
(Converts light to
electrical power.)
Electrical
energy
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
LEVEL 1
LEVEL 2
Some or all
LEVEL 3
LEVEL 4
Dis-
functions
disabled
Charge
charge
Rechargeable battery
World Time Mode
Alarm Mode
General Guide
• Press C to change from mode to mode.
• In any mode (except when a setting screen is on the display), press L to illuminate
the display.
Timekeeping Mode
Press C.
Countdown Timer Mode
Stopwatch Mode
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).
• You can disable time signal reception, if you want. See “To turn auto receive on and
off” for more information.
• Under factory default settings, auto receive is turned off for all of the following city
codes: MOW (Moscow), HNL (Honolulu), and ANC (Anchorage). For details about
turning on auto receive for these city codes, see “To turn auto receive on and off”.
Current Time Setting
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
This watch adjusts its time setting automatically in accordance with a time calibration
signal.You also can perform a manual procedure to set the time and date, when
necessary.
• The first thing you should do after purchasing this watch is to specify your
Home City (the city where you normally will use the watch). For more
information, see “To specify your Home City” below.
• When using the watch outside the areas covered by the time signal transmitters, you
will have to adjust the current time setting manually as required. See “Timekeeping”
for more information about manual time settings.
• The U.S. time calibration signal can be picked up by the watch while in North
America. The term “North America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
• 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”.
• Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.
Important!
To specify your Home City
• 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.
1. In the Timekeeping Mode, hold down A until the city
PM indicator
code starts to flash, which indicates the setting screen.
2. Press D (east) and B (west) to select the city code
you want to use as your Home City.
LIS, LON : Lisbon, London
MAD, PAR, ROM, BER, STO : Madrid, Paris,
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Rome, Berlin, Stockholm
ATH
MOW
: Athens
12 o’clock
or
: Moscow
Seconds
Hour : Minutes
City code
HKG, BJS, TPE : Hong Kong, Beijing, Taipei
SEL, TYO : Seoul, Tokyo
HNL
ANC
: Honolulu
: Anchorage
YVR, LAX : Vancouver, Los Angeles
YEA, DEN: Edmonton, Denver
MEX, CHI : Mexico City, Chicago
• Make sure the watch is facing the right way.
• Proper signal reception can be difficult or even impossible under the conditions listed
NYC
YHZ
YYT
: New York
: Halifax
: St.Johns
below.
3. 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 or you
can set the time manually.
• The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see
“Important!” under “Time Calibration Signal Reception” and “Transmitters”.
• See the maps under “Approximate Reception Ranges” for information about the
reception ranges of the watch.
Inside or
among
buildings
Inside a
vehicle
Near
Near a
construction tension power behind
appliances, site, airport, lines mountains
Near high-
Among or
household
office
or other
equipment, sources of
or a mobile electrical
phone
noise
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Operation Guide 3179
3. Press C to move the flashing between the hour and minute settings.
Signal Reception Troubleshooting
4. While a setting is flashing, use D (+) and B (–) to change it.
• With the 12-hour format, set the time correctly as a.m. or p.m. (P indicator).
5. Press A to exit the setting screen.
Check the following points whenever you experience problems with signal reception.
Problem
Probable Cause
What you should do
• Enter the Timekeeping
Mode and try again.
Cannot perform • The watch is not in the
manual receive. Timekeeping Mode.
Alarm Operation
• Your current Home City is not one • Select LIS, LON, MAD,
of the following: LIS, LON, MAD,
PAR, ROM, BER, STO, ATH,
MOW, HKG, BJS,TPE, SEL,TYO,
HNL, ANC,YVR, LAX, YEA, DEN,
MEX, CHI, NYC, YHZ, or YYT
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, until you turn the alarm off.
• Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode time.
PAR, ROM, BER, STO,
ATH, MOW, HKG, BJS,
TPE, SEL,TYO, HNL, ANC,
YVR, LAX, YEA, DEN,
MEX, CHI, NYC, YHZ,
or YYT as your Home City.
• To stop the alarm tone after it starts to sound, press any button.
• Performing any one of the operations below during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Auto receive is • You changed the time setting
• Perform manual signal
receive or wait until the next
auto signal receive
turned on, but
the RCVD
indicator does
not appear on
the display.
manually.
• The DST setting was changed
Displaying the SNZ setting screen
manually in the World Time Mode.
operation is performed.
• You pressed a button while signal • Check to make sure the
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
receive was in progress.
watch is in a location where
it can receive the signal.
• Even if receive is successful, the
RCVD indicator will disappear
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 RCVD
indicator appears only when time
data and date data (year, month,
day) are both received.
To turn an alarm on and off
1. In the Alarm Mode, use D to select an alarm.
Alarm on indicator
2. Press B to toggle it on and off.
Snooze alarm
indicator
• Turning on a alarm (AL1, AL2, AL3, AL4 or
SNZ) displays the alarm on indicator on its Alarm Mode
screen.
• In all modes, the alarm on indicator is shown for any
alarm that currently is turned on.
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator flashes while the snooze
alarm is sounding and during the 5-minute intervals
between alarms.
Time setting
is incorrect
following
signal
• If the time is one hour off, the DST • Change the DST setting to
setting may be incorrect. Auto DST.
• The Home City code setting is not • Select the correct Home
ON
correct for the area where you are
using the watch.
City code.
reception.
To turn the Hourly Time Signal on and off
1. In the Alarm Mode, use D to select the Hourly Time
Signal (SIG).
2. Press B to toggle it on and off.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
Hourly time signal
on indicator
• The Hourly Time Signal on indicator is shown on the
display in all modes while this function is turned on.
World Time
World Time shows the current time in 48 cities (31 time
zones) around the world.
City code
• 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.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 23 hours, 59
minutes, 59.99 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
Hours
• Select a city code in the World Time Mode to display the
Current time in
selected city
current time in any particular time zone around the
globe. See the “City Code Table” for information about
the UTC differential settings that are supported.
• The stopwatch measurement operation continues even
• All of the operations in this section are performed in the World Time Mode, which
you enter by pressing C.
if you exit the Stopwatch Mode.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
Seconds
To view the time in another city
While in the World Time Mode, use the D (eastward) and B (westward) to scroll
through the city codes (time zones).
1/100 second
Minutes
• Pressing the D and B at the same time will jump to the UTC time zone.
To measure times with the stopwatch
Elapsed Time
To toggle a city code time between Standard Time and Daylight Saving Time
1. In the World Time Mode, use D and B to display the
city code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.
D
B
D
D
D
➤
➤
➤
➤
➤
➤
Start
Stop
Re-start
Stop
Clear
2. Hold down A to toggle between Daylight Saving Time
(DST indicator displayed) and Standard Time (DST
indicator not displayed).
Split Time
D
D
B
B
B
➤
➤
• The DST indicator is shown on the World Time Mode
screen while Daylight Saving Time is turned on.
Start
Split
(SPL displayed)
Split release
Stop
Clear
DST indicator
• Note that the Standard Time/Daylight Saving Time
setting affects only the currently displayed city code.
Other city codes are not affected.
Two Finishes
B
B
D
B
D
➤
➤
➤
➤
• Note that you cannot switch between Standard Time
and Daylight Saving Time while UTC is selected as the
city code.
Start
Split
Stop
Split release
Display time of
second runner.
Clear
First runner finishes. Second runner
Display time of first finishes.
runner.
Alarms
Countdown Timer
The Alarm Mode gives you a choice of four one-time
alarms and one snooze alarm.
Alarm number
You can set the countdown timer within a range of one
minute to 24 hours. An alarm sounds when the countdown
reaches zero.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
C.
Also use the Alarm Mode to turn the Hourly Time Signal
(SIG) on and off.
• There are five alarm screens numbered AL1, AL2,
AL3 and AL4 for the one-time alarm, and a snooze
alarm screen indicated by SNZ. The Hourly Time
Signal screen is indicated by SIG.
Countdown End Beeper
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Hours
Minutes
Seconds
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.
Alarm time
(Hour : Minutes)
To set an alarm time
To configure the countdown timer
1. While the countdown start time is on the display in the
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
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” to
display it.
2. Press C to move the flashing in the sequence shown
below to select other settings.
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• To set a one-time alarm, display alarm screen AL1, AL2, AL3 or AL4.
To set the snooze alarm, display the SNZ screen.
• The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash, which indicates the setting screen.
Hours
Minutes
• This operation turns on the alarm automatically.
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Operation Guide 3179
3. When the setting you want to change is flashing, use D and B to change it as
• 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.
described below.
Setting
Screen
Button Operation
Hours, Minutes
Use D (+) and B (–) to change the setting.
• Never try to remove or replace the watch’s rechargeable battery yourself. Use of the
wrong type of battery can damage the watch.
• To specify a countdown start time of 24 hours, set
4. Press A to exit the setting screen.
.
• All data stored in memory is deleted, and 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.
To use the countdown timer
Press D while in the Countdown Timer Mode to start the
countdown timer.
• 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.
• The countdown timer operation continues even if you
exit the Countdown Timer Mode.
• Press D while a countdown operation is in progress to
pause it. Press D again to resume the countdown.
• To stop a countdown operation completely, first pause it
(by pressing D), and then press B. This returns the
countdown time to its starting value.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Current timer
time
Level
Battery Power Indicator
Function Status
Battery power
indicator
Timer start time
1
All functions enabled.
2
3
All functions enabled.
Illumination
This watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch turns on illumination
automatically when you angle the watch towards your face.
• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
• See “Illumination Precautions” for other important
information about using illumination.
Auto light switch on
indicator
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Auto and manual receive,
illumination, and beeper
disabled.
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(Charge Soon Alert)
4
5
Except for timekeeping and
the CHG (charge) indicator,
all functions and display
indicators disabled.
All functions disabled.
To illuminate the display manually
In any mode, press L to turn on illumination.
• The above operation turns on illumination regardless of
the current auto light switch setting.
• The flashing LOW 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.
• You can use the procedure below to select either 1.5 seconds or 3 seconds as the
illumination duration. When you press L, the illumination will remain on for about
1.5 seconds or 3 seconds, depending on the current illumination duration setting.
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until the
display contents start to flash. This is the setting screen.
2. Press C 10 times until the current illumination duration
•
Display indicators reappear as soon as the battery is charged from Level 5 to Level 2.
setting (
or
) appears.
• 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.
3. Press D to toggle the setting between
(approximately 1.5 seconds) and
3 seconds).
4. Press A to exit the setting screen.
(approximately
• Performing illumination, or beeper operations during a
Recover indicator
short period may cause
display.
(recover) to appear on the
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on, whenever you position
your wrist as described below in any mode. Note that this watch features a “Full Auto
EL Light,” so the auto light switch operates only when available light is below a certain
level. It does not turn on the backlight under bright light.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
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• If
(recover) appears frequently, it probably means
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
Moving the watch to a position that is parallel to the ground and then tilting it towards
you more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
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.
Parallel to
ground
More than 40°
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.
Warning!
• Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
startle or distract others around you.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
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.
• When you are wearing the watch, make sure that its auto light switch is turned
off before riding a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
Exposure Level (Brightness)
Approximate
Exposure Time
Outdoor Sunlight (50,000 lux)
5 minutes
To turn the auto light switch on and off
In the Timekeeping Mode, hold down L for about three seconds to toggle the auto
light switch on (auto light switch on indicator displayed) and off (auto light switch on
indicator not displayed).
• The auto light switch on indicator is on the display in all modes while the auto light
switch is turned on.
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
24 minutes
48 minutes
8 hours
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifications.
• Stable operation is promoted by frequent exposure to light.
Power Supply
RecoveryTimes
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.
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Approximate Exposure Time
Solar cell
Example: Orient the watch so its face is
Level 5
Level 4
3 hours
9 hours
14 hours
Level 3
Level 2
18 hours
90 hours
182 hours
Level 1
5 hours
24 hours
49 hours
pointing at a light source.
• The illustration shows how to position a
watch with a resin band.
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
• 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.
Indoor Fluorescent
Lighting (500 lux)
155 hours
- - - - - - - - - - - - - - - -
Important!
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
• 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.
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Operation Guide 3179
Timekeeping
Press the B button to toggle the lower display between
Current Time
Day of week Month – Day
To change the Daylight Saving Time (summer time) setting
the day of the week and date, and the currently selected
World Time city and time (Dual Time).
Use the Timekeeping Mode to set and view the current
time and date.
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press C and the DST setting screen appears.
3. Use D to cycle through the DST settings in the
sequence shown below.
Read This BeforeYou 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 are displayed in accordance with the time and
date settings you configure in the Timekeeping Mode.
Hour : Minutes
Seconds
Auto DST (
AvtA
)
DST off (
OFF
)
DST on ( )
ON
DST indicator
PM indicator
L
• 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.
B
B
L
Dual Time
Transmitter
Japan
Covered City Codes
TPE, SEL, TYO
China
HKG, BJS
City code
Dual time
U.S.
HNL, ANC, YVR, LAX, YEA, DEN, MEX, CHI, NYC, YHZ, YYT
Europe (U.K., Germany) LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW
None All other city codes
To set the time and date manually
1. In the Timekeeping Mode hold down A until the city
code starts to flash, which indicates the setting screen.
2. Use D and B 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”.
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.
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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.
3. Press C to move the flashing in the sequence shown below to select the other
setting.
12/24-Hour
Format
Graphic Area
Minutes
Year
DST
Seconds
Hour
Month
City Code
The information shown in the graphic area depends on the current mode.
Illumination
Duration
Button
Operation Tone
Power Saving
Day
Mode
Timekeeping Mode
World Time Mode
Alarm Mode
Graphic Area
Graphic Area
Timekeeping Mode seconds
Timekeeping Mode seconds
No indication
• The following steps explain how to configure timekeeping settings only.
4. When the timekeeping setting you want to change is flashing, use D or B to
change it as described below.
Stopwatch Mode
CountdownTimer Mode
Stopwatch Mode 1/10 seconds
CountdownTimer Mode seconds
Screen:
To do this:
Change the city code
Do this:
Use D (east) and B
(west).
Cycle between Auto DST (AvtA), Daylight Press D.
Saving Time (ON) and Standard Time
(OFF).
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.
Mute indicator
Toggle between 12-hour (
hour ( ) timekeeping
) and 24- Press D.
Reset the seconds to
Press D.
Change the hour and minutes
Change the year, month, or day
Use D (+) and B (–).
Use D (+) and B (–).
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press C nine times until the current button operation
tone setting (
3. Press D to toggle the setting between
and (tone off).
4. Press A to exit the setting screen.
Toggle the button operation tone between Press D.
(on) and (off)
Toggle the illumination duration between
(approximately 1.5 seconds) and
(approximately 3 seconds).
/
or
) appears.
(tone on)
Press D.
• The mute indicator is displayed in all modes when the
button operation tone is turned off.
Toggle between Power Saving on (
off (
) and Press D.
)
Power Saving Function
5. Press A to exit the setting screen.
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.
• Auto DST (AvtA) can be selected only while LIS, LON, MAD, PAR, ROM, BER,
STO, ATH, MOW,TPE, SEL,TYO, HNL, ANC,YVR, LAX,YEA, DEN, MEX, CHI,
NYC, YHZ, or YYT is selected as the Home City code. For more information, see
“Daylight Saving Time (DST)” below.
Power saving indicator
• 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.
Elapsed Time
in Dark
Display
Operation
60 to 70 minutes Blank, with Power Saving All functions enabled, except for the
indicator flashing display
Blank, with Power Saving Auto receive, beeper tone,
indicator not flashing illumination, and display are disabled.
6 or 7 days
• 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.
Daylight SavingTime (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 signal transmitted by the Fukushima and Fukuoka/Saga,
Japan transmitters include summer time data, summer time currently is not
implemented in Japan (as of 2008).
• The default DST setting is Auto DST (AvtA) whenever you select LIS, LON, MAD,
PAR, ROM, BER, STO, ATH, MOW,TYO, ANC,YVR, LAX,YEA, DEN, MEX, CHI,
NYC,YHZ, or YYT as your Home City code.
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area.
• Press any button.
• Angle the watch towards your face for reading.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down A until the city
l
code starts to flash, which indicates the setting screen.
2. Press C 11 times until the Power Saving on/off screen
appears.
• 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.
3. Press D to toggle Power Saving on (
4. Press A to exit the setting screen.
) and off (
).
l
• The Power Saving indicator is on the display in all
modes while Power Saving is turned on.
On/Off status
5
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Operation Guide 3179
Specifications
Accuracy at normal temperature: 15 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Standard Time /
Daylight Saving Time (summer time)
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)
WorldTime: 48 cities (31 time zones)
Other: Daylight Saving Time/Standard Time
Alarms: 5 daily alarms (four one-time alarms; one snooze alarm); Hourly Time Signal
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99''
Measuring modes: Elapsed time, split time, two finishes
Countdown Timer:
Measuring unit: 1 second
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.
• 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, DST (summer
time), and auto receive settings.
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Illumination: EL (electro-luminescent panel); Full Auto Light Switch; Selectable
illumination duration
• 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.
Other: Button operation tone on/off
Transmitters
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 9 months (from full charge to Level 4) under
the following conditions:
The time calibration signal received by this watch depends on the currently selected
Home City code.
• When a U.S. time zone is selected, the watch receives the time calibration signal
transmitted from the United States (Fort Collins).
• Watch not exposed to light
• Internal timekeeping
• 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).
• When your Home City is LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW
(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 LIS, LON, Mainflingen for MAD, PAR, ROM, BER, STO, ATH, and
MOW).
• 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
Frequent use of illumination runs down the battery. Particular care is required
when using the auto light switch.
City Code Table
City
Code
UTC Offset/
GMT Differential
City
Code
UTC Offset/
GMT Differential
City
City
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.
MOW
JED
THR
DXB
KBL
KHI
DEL
KTM
DAC
RGN
BKK
SIN
Moscow
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
Kathmandu
Dhaka
Yangon
Bangkok
Singapore
Hong Kong
Beijing
Taipei
Seoul
Tokyo
Adelaide
Guam
Sydney
Noumea
Wellington
PPG
HNL
ANC
YVR
LAX
YEA
DEN
MEX
CHI
NYC
SCL
YHZ
YYT
Pago Pago
Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
Mexico City
Chicago
New York
Santiago
Halifax
–11
–10
–9
+3
+3.5
+4
+4.5
+5
+5.5
+5.75
+6
+6.5
+7
Scrolling
–8
–7
The B and D 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 at high speed.
–6
–5
–4
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
HKG
BJS
St. Johns
–3.5
–3
–2
• 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.
+8
RIO Rio De Janeiro
FEN Fernando de Noronha
RAI
UTC
LIS
LON
MAD
PAR
ROM
BER
STO
ATH
CAI
TPE
SEL
TYO
ADL
GUM
SYD
NOU
WLG
• The year can be set in the range of 2000 to 2099.
Praia
–1
+9
+9.5
+10
• 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.
Lisbon
London
Madrid
Paris
Rome
Berlin
Stockholm
Athens
Cairo
0
+1
+2
• 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.
+11
+12
World Time
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
Illumination Precautions
• The electro-luminescent panel that provides illumination loses power after very long
JRS
Jerusalem
use.
• Illumination may be difficult to see when viewed under direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• Based on data as of June 2008.
• The rules governing global times (UTC offset and GMT differential) and summer
time are determined by each individual country.
• Illumination turns off automatically whenever an alarm sounds.
• Frequent use of illumination runs down the battery.
Auto light switch precautions
• Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light
switch to operate when it is not needed, which shortens battery life. If you want to
wear the watch on the inside of your wrist, turn off the auto light switch feature.
More than 15 degrees
too high
• Illumination may not turn on if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.
• Illumination turns off after a preset amount of time (1.5
or 3 seconds), even if you keep the watch pointed
towards your face.
• Static electricity or magnetic force can interfere with proper operation of the auto
light switch. If illumination does not turn on, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back toward you again. If this does
not work, drop your arm all the way down so it hangs at your side, and then bring it
back up again.
• Under certain conditions, illumination may not turn on until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the auto light switch.
• You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.
6
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