MO0807-EA
Operation Guide 3155
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 built-in battery. Leaving or using the watch
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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.
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Solar cell
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.
• 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.
• 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
LEVEL 1
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
LEVEL 2
Some or all
functions
LEVEL 3
Dis-
charge
LEVEL 4
disabled
Charge
Rechargeable battery
Rally Mode
Recall Mode
World Time 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
Alarm 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).
• See the maps under “Approximate Reception Ranges” 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” 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
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.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• 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”.
To specify your Home City
1. In the Timekeeping Mode, hold down A until the city
City code
Important!
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.
• 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.
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.
LIS, LON : Lisbon, London
MAD, PAR, ROM, BER, STO : Madrid, Paris,
Rome, Berlin, Stockholm
ATH
MOW
: Athens
: Moscow
Hour : Minutes
PM indicator Seconds
HKG, BJS, TPE : Hong Kong, Beijing, Taipei
SEL, TYO : Seoul, Tokyo
12 o’clock
or
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.
MIA, YTO, NYC : Miami, Toronto, New York
• Proper signal reception can be difficult or even impossible under the conditions listed
YHZ
YYT
: 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 “Time
Calibration Signal Reception” and “Transmitters”.
Inside or
among
buildings
Inside a Near household Near a
vehicle appliances, office construction
Near high-
tension
power lines mountains
Among or
behind
equipment,
or a mobile
phone
site, airport, or
other sources of
electrical noise
1
Operation Guide 3155
To turn auto receive on and off
Signal Reception Troubleshooting
1. In the Timekeeping Mode, press D to display the last
successful receive time and date screen.
2. 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 one that does not
support time calibration reception.
Check the following points whenever you experience problems with signal reception.
Problem
Cannot perform
manual receive.
Probable Cause
• The watch is not in the Timekeeping • Enter the Timekeeping Mode
Mode. and try again.
• Your current Home City is not one of • Select LIS, LON, MAD, PAR,
What you should do
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the following: LIS, LON, MAD, PAR,
ROM, BER, STO, ATH, MOW, HKG,
BJS, TPE, SEL, TYO, HNL, ANC,
YVR, LAX, YEA, DEN, MEX, CHI,
MIA, YTO, NYC, YHZ, or YYT
ROM, BER, STO, ATH, MOW,
HKG, BJS, TPE, SEL, TYO,
HNL, ANC, YVR, LAX, YEA,
DEN, MEX, CHI, MIA, YTO,
NYC, YHZ, or YYT as your
Home City.
3. Press D to toggle auto receive on (ON) and off (OFF).
4. Press A to exit the setting screen.
On/Off status
• For information about city codes that support signal
receive, see “To specify your Home City”.
Auto receive is
turned on, but the
settings updated
indicator does not
appear on the
display.
• You changed the time setting
manually.
• The DST setting was changed
manually in the World Time Mode.
• You pressed a button while signal
receive was in progress.
• 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.
To check the latest signal reception results
Press D to view the last successful receive time and
date. Press D again to return to the previous screen.
• Even if receive is successful, the
settings updated 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 settings
updated indicator appears only
when time data and date data (year,
month, day) are both received.
Time setting is
incorrect following
signal reception.
• 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.
• Select the correct Home City
code.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
Rally Mode
The Rally Mode of your watch can be used to measure special stage elapsed time,
and to keep track of the goal target time (countdown). The Rally Mode timing
operation is shown in the illustration below.
Remaining target time
(minutes, seconds)
Special stage elapsed
time (hours, minutes,
seconds, 1/10-second)
Elapsed time
1/10-second indicator
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Remaining
target time
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(hours:minutes)
Special stage time
measurement end
Goal
Start point
Special stage (competitive section 42' 30" 0)
Target time (0:50)
Road section (non-competitive 07' 30" 0)
D Start
D Stop
B Record elapsed time
The watch returns to the reset
screen automatically when the
target time becomes zero.
Special Stage Elapsed Time Measurement
The special stage elapsed time is measured up to 99 hours, 59 minutes, 59.9
seconds. If the time exceeds this, timing reverts to zero and continues from there.
Special StageTiming
This section describes operations you can perform while
special stage timing is in progress.
Target time
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To pause the current time on the display
While a special stage timing operation is in progress press
the D button.
Before Starting Measurement
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The watch comes with 10 preset target times (link times),
LT-05 target time (0:50)
which you can use as-is or change to the value you want.
• This will pause the current elapsed time (flashing) on the
display for about one or two minutes. Though the time is
frozen on the display, the watch continues the special
stage timing operation (and count down of the remaining
target time) internally.
• While a time is paused on the display, you can record it
in memory or reset the timing operation to zero. If you
don’t do anything, the display will return to the normal
elapsed time measurement screen after a few minutes.
You can use the B button to select the target time you
want while the current target time is reset to its initial
value.
LT-01 0:10
LT-02 0:20
LT-03 0:30
LT-04 0:40
LT-05 0:50
LT-06 1:00
LT-07 1:30
LT-08 2:00
LT-09 3:00
LT-10 5:00
OFF
Measured elapsed time
LT-05
To record the time paused on the display
To change a target time
While a time is paused on the display (see above), press the B button.
• This will save the paused time in memory and display the ongoing special stage
timing operation.
1. While the current target time is reset to its initial value in
the Rally Mode, hold down A until the display contents
start to flash. This is the setting screen.
2. Use the D (+) and B (–) buttons to select the target
(link) time you want to change.
3. Press the C button so the current target time’s hour
digit starts to flash.
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• The watch has enough memory to store up to 30 measurement time records. If there
are already 30 records in memory, storing a new measurement time causes the
oldest record to be deleted automatically to make room for the new one.
To reset the timing operation to zero
While a time is paused on the display (see above), hold down the B button.
• This will reset the elapsed time operation to zero.
4. Use the D (+) and B (–) buttons to change the hour digit value.
5. Press the C button to move the flashing to the minute digits.
6. Use the D (+) and B (–) buttons to change the minute digit value.
7. After the time is setting you want, press the A button to exit the setting screen.
To cancel an ongoing elapsed time measurement operation
Hold down the B button to reset the elapsed time operation to zero.
You can set a target time up to 24 hours, in units of one minute.
To change screen contents during elapsed time measurement
Press the B button to display the remaining target time. Note that this operation is not
available if “OFF” is selected for the target time.
C
C
Target (link) time
number
Target time
minutes
Target time hours
When the remaining target
time is 5 minutes or more
When the remaining target time is
less than 5 minutes
C
Target
time
To start a Rally Mode time measurement
Press the D button to start the auto start countdown.
Time measurement (special stage) will start when the
auto start countdown reaches 00 seconds.
Target
time
Auto start countdown
seconds indicator
• The watch will beep and display illumination will flash
whenever the remaining auto countdown time reaches
50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 and 0 seconds.
• You can cancel the auto start countdown at any point
and start time measurement (special stage) manually by
pressing the D button.
• You can cancel the countdown and return to the
countdown start screen by pressing the B button while
a countdown is in progress.
Remaining Target Time Alert
The watch will beep and display illumination will flash when the remaining target time
reaches the following points, 5, 3 and 1 minute, and 30, 10, 5, 4, 3, 2, and 1 second
before time up, and at time up.
Remaining auto start
countdown time
(36 seconds indicated here)
3
Operation Guide 3155
Recall Mode
World Time
You can use the Recall Mode to view the following data in watch memory.
• Times measured in the Rally Mode
World Time shows the current time in 48 cities (29 time
zones) around the world.
City code
• Total of the measured times currently in memory (TTL)
• 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.
• You can use the D (forward) and B (back) buttons to scroll through records as
shown below. Holding down either button scrolls the records at high speed.
• Holding down the A button while a record is displayed will show the date and time
that the measurement was taken.
• To go straight to the total measured time screen, press the D and B buttons at the
same time.
• How the hour digits are displayed changes (to a format that requires two screens)
when the total measured time is within the range of 100 hours, 00 minutes and 00
seconds, to 2999 hours, 59 minutes 57 seconds. While the total measured time is
displayed in this case, the display will switch automatically between the two screens
at two-second intervals.
• Select a city code in the World Time Mode to display the
current time in any particular time zone around the
globe. See the “UTC Differential/City Code List” for
information about the UTC differential settings that are
supported.
Current time in
selected city
B
D
• All of the operations in this section are performed in the World Time Mode, which
you enter by pressing C.
D
B
D
B
To view the time in another city
Total measured
time
While in the World Time Mode, use the D (eastward) and B (westward) buttons to
scroll through the city codes (time zones). Holding down either button scrolls at high
speed.
Record 30
Record 1
Measured elapsed time
• Pressing the D and B buttons at the same time will jump to the UTC time zone.
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.
Record Number
Measured
elapsed time
A
A
2. Hold down A to toggle between Daylight Saving Time
(DST indicator displayed) and Standard Time (DST
indicator not displayed).
Measurement date and time
Measurement date
(Month – Day)
• The DST indicator is shown on the World Time Mode
Measurement time
(Hour : Minutes)
screen while Daylight Saving Time is turned on.
• Note that changing the Daylight Saving Time for any city
code causes the setting to be applied to all city codes,
except UTC.
DST indicator
Total measured time (TTL)
Total measured
time
When the total measured time is in
the range of zero to 2999 hours,
59 minutes 57 seconds
Alarms
You can set up to five independent multi-function alarms
with hour, minutes, month, and day. When an alarm is
turned on, the alarm tone sounds when the alarm time is
reached. One of the alarms is a snooze alarm, while the
other four are one-time alarms.
Alarm number
Alarm date
(Month – Day)
Hour digits screen
You also can turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
• There are five alarm screens numbered AL1, AL2,
AL3 and AL4 for the one-time alarm, a snooze alarm
screen indicated by SNZ. The Hourly Time Signal
screen is indicated by SIG.
Switches automatically at
two-second intervals
Switches automatically at
two-second intervals
Minute digits screen
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm time
(Hour : Minutes)
Alarm Types
To correct recorded times
The alarm type is determined by the settings you make, as described below.
You can use the procedure below to correct times recorded by the watch so they
match official race times. The total measured time value also is updated in accordance
with the corrected times.
• Daily alarm
Set the hour and minutes for the alarm time. This type of setting causes the alarm to
sound everyday at the time you set.
1. Hold down A until the display contents start to flash.
This is the setting screen.
2. Use the D (+) and B (–) buttons to change the
measured 1/10-second digit.
• Date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting causes
the alarm to sound at the specific time, on the specific date you set.
3. Press the C button to move the flashing to the
measured seconds.
4. Use the D (+) and B (–) buttons to change the
measured seconds.
5. Press the C button to move the flashing to the
measured minutes.
6. Use the D (+) and B (–) buttons to change the
measured minutes.
• 1-Month alarm
Set the month, hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at the time you set, only during the month you set.
• Monthly alarm
Set the day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound every month at the time you set, on the day you set.
To set an alarm time
7. Press the C button to move the flashing to the
measured hours.
1. In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
8. Use the D (+) and B (–) buttons to change the measured hours.
9. After the time is what you want, press the A button to exit the setting screen.
• You can change a measured time to a value up to 99 hours, 59 minutes, 59.9
seconds.
• Holding down the D (+) or B (–) button will scroll the selected value at high speed.
• To reset the data to all zeros, press the D and B buttons at the same time.
C
C
C
C
Measured
1/10 second
Measured
seconds
Measured
minutes
Measured
hours
• To set a one-time alarm, display an alarm screen AL1, AL2, AL3 and 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.
• This operation turns on the alarm automatically.
3. Press C to move the flashing in the sequence shown below to select other
settings.
To delete all memory records
You can use the following procedure to clear all of the
measurement data records currently stored in watch
memory.
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1. Use the D and B button to display the total
measurement time screen.
2. Hold down A until the display contents start to flash.
This is the setting screen.
Hour
Minutes
Month
Day
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3. Press the D (+) and B (–) buttons at the same time to
delete the records.
4. Press the A button to exit the setting screen.
4. While a setting is flashing, use D and B to change it as described below.
Screen To do this: Do this:
L
Change the hour Use D (+) and B (–).
and minutes
•
With the 12-hour format, set the time correctly
as a.m. or p.m. (P indicator).
To set an alarm that does not include a month
and/or day, set for each setting.
Change the month
and day
•
5. Press A to exit the setting screen.
4
Operation Guide 3155
3. When the setting you want to change is flashing, use D and B to change it as
Alarm Operation
described below.
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.
Setting
Screen
Button Operation
Hours, Minutes
Use D (+) and B (–) to change the setting.
• To stop the alarm tone after it starts to sound, press any button.
• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
• To specify a countdown start time of 24 hours, set
4. Press A to exit the setting screen.
.
To use the countdown timer
Displaying the SNZ setting screen
Press D while in the Countdown Timer Mode to start the
countdown timer.
Timer start time
Seconds
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
• 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.
To turn an alarm on and off
1. In the Alarm Mode, use D to select an alarm.
2. Press B to toggle it on and off.
• Turning on a alarm (AL1, AL2, AL3, AL4 or
SNZ) displays the alarm on indicator (
Alarm Mode screen.
) on its
• In all modes, the alarm on indicator is shown for any
alarm that is currently turned on.
Current timer time
ON
Alarm on
indicator
Snooze alarm
indicator
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator (
snooze alarm is sounding and during the 5-minute
intervals between alarms.
Illumination
) flashes while the
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.
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.
• The Hourly Time Signal on indicator (
) is shown
on the display in all modes while this function is turned
on.
To illuminate the display manually
Auto light switch
on indicator
In any mode, press L to turn on illumination.
• The above operation turns on illumination regardless of
the current auto light switch setting.
Hourly time signal
on indicator
• 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.
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.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
Hours
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 the C button three times to move the flashing to
the seconds.
3. While the seconds are flashing, press B to toggle the
setting between 1.5 seconds ( ) and 3 seconds (
).
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
4. Press A to exit the setting screen.
Minutes
1/100 second
Seconds
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
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.
To measure times with the stopwatch
Elapsed Time
D
➤ D
Stop
➤ D
Re-start
➤ D
Stop
➤ B
Clear
Start
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.
Split Time
D
Start
➤ B
Split
➤ B
Split release
➤ D
Stop
➤ B
Clear
(SPL displayed)
Parallel to
ground
Two Finishes
More than 40°
D
➤ B
➤ D
Stop
➤ B
Split release
➤ B
Clear
Start
Split
First runner finishes. Second runner
Display time of first
runner.
Display time of
second runner.
finishes.
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.
• 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.
Countdown Timer
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.
Hours Seconds
Minutes
To turn the auto light switch on and off
Configuring the Countdown Timer
The following are the settings you should configure before
actually using the countdown timer.
In the Timekeeping Mode, hold down L for about three seconds to toggle the auto
light switch on (A.EL displayed) and off (A.EL not displayed).
• The auto light switch on indicator (A.EL) is on the display in all modes while the auto
light switch is turned on.
Countdown start time
• See “To configure the countdown timer” for information
about setting up the timer.
Power Supply
Countdown End Beeper
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.
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.
To configure the countdown timer
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
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” to
display it.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Hours
Minutes
5
Operation Guide 3155
Important!
Recovery Times
• 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.
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
Level 5 Level 4 Level 3
Level 2
Level 1
• 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.
• 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.
• 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.
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)
2 hours
6 hours
26 hours
129 hours
263 hours
- - - - - - - -
7 hours
36 hours
73 hours
- - - - - - - -
11 hours
118 hours
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Timekeeping
Current Time
Press the B button to toggle the lower display between
the day of the week and date, and the currently selected
World Time city and time (Dual Time).
Level Battery Power Indicator
Function Status
Day of Seconds
week
Month – Day
1
All functions enabled.
Use the Timekeeping Mode to set and view the current
time and date.
2
All functions enabled.
3
4
5
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Auto and manual receive,
illumination, and beeper
disabled.
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PM
Hour : Minutes
Seconds
indicator
(Charge Soon Alert)
L
Battery power
indicator
B
BL
Except for timekeeping and
the C (charge) indicator, all
functions and display
indicators disabled.
All functions disabled.
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Dual Time
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c
Dual time
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City code
• 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.
• Display indicators reappear as soon as the battery is charged from Level 5 to Level
2.
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.
To set the time and date manually
• 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.
1. In the Timekeeping Mode hold down A until the city
code starts to flash, which indicates the setting screen.
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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.
• Performing illumination, or beeper operations during a
short period may cause
(recover) to appear on the
display. Illumination, alarm, countdown timer alarm, and
hourly time signal will be disabled until battery power
recovers.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
• For full information on city codes, see the “UTC Differential/City Code List”.
3. Press C to move the flashing in the sequence shown below to select the other
setting.
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12/24-Hour
DST
Day
Seconds
Year
Hour
City Code
Format
• If
(recover) appears frequently, it probably means
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
Power Saving
Month
Minutes
Recover indicator
• 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.
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.
Screen:
To do this:
Do this:
Change the city code
Use D (east) and B
(west).
Cycle between Auto DST (AvtA), Daylight Press D.
Saving Time (ON) and Standard Time
(OFF).
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.
Toggle between 12-hour (
hour ( ) timekeeping
Reset the seconds to
) and 24-
Press D.
• On the dashboard of a car parked in direct sunlight
Press D.
Press B.
• Too close to an incandescent lamp
Toggle the display illumination duration
between 1.5 and 3 seconds
• Under direct sunlight
Change the hour and minutes
Use D (+) and B (–).
Charging Guide
After a full charge, timekeeping remains enabled for up to about seven 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.
Change the year, month, or day
Toggle between Power Saving on ( ) and Press D.
off (
Exposure Level (Brightness)
Approximate
ExposureTime
)
Outdoor Sunlight (50,000 lux)
5 minutes
5. Press A to exit the setting screen.
• 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, MIA, YTO, NYC, YHZ, or YYT 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.
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
• Since these are the specs, we can include all the technical details.
• Watch not exposed to light
• Internal timekeeping
12-hour and 24-hour 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
• 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.
• Measurement of 26 Rally Mode stages per month
• Approximately 4 minutes of signal reception per day
• Stable operation is promoted by frequent exposure to light.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
6
Operation Guide 3155
To turn Power Saving on and off
Daylight SavingTime (DST)
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 Power Saving on/off
screen appears.
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 2007).
• 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, MIA, YTO, NYC, YHZ, or YYT 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.
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3. Press D to toggle Power Saving on ( ) and off
(
).
4. Press A to exit the setting screen.
On/Off status
• The Power Saving indicator (PS) is on the display in all
modes while Power Saving is turned on.
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.
To change the Daylight Saving Time (summer time) setting
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.
• 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 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.
Auto DST (
)
DST off (
)
DST on ( )
ON
AvtA
OFF
DST indicator
• 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 area city codes
•
•
•
TYO, TPE, and SEL
HKG, BJS
HNL, ANC, LAX, DEN, CHI, NYC, YVR, YEA, MEX, MIA, YTO,
YHZ, and YYT
• 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.
•
•
LON, PAR, BER, ATH, LIS, MAD, ROM, STO, and MOW
All other city codes
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.
Transmitters
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).
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.
• 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).
Graphic Area
The information shown in the graphic area depends on the current mode.
Graphic Area
Mode
Timekeeping Mode
Rally Mode
Graphic Area
Timekeeping Mode seconds
Target time number/Measurement time
1/10 seconds during measurement
Record number
Timekeeping Mode seconds
No indication
Stopwatch Mode 1/10 seconds
Recall Mode
World Time Mode
Alarm Mode
Stopwatch Mode
CountdownTimer Mode CountdownTimer Mode seconds
Auto Return Features
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Button Operation Tone
Scrolling
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, the
alarms, the Hourly Time Signal, the countdown alarm,
and Rally Mode auto start all operate normally.
The B and D buttons 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.
Initial Screens
When you enter the Rally Mode, Recall Mode, World Time Mode, or Alarm Mode, the
data you were viewing when you last exited the mode appears first.
To turn the button operation tone on and off
Timekeeping
In any mode (except when a setting screen is on the display), hold down C to toggle
the button operation tone on ( not displayed) and off ( displayed).
• Holding down C to turn the button operation tone on or off also causes the watch’s
current mode to change.
• 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 indicator is displayed in all modes when the button operation tone is turned
off.
• 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.
Power Saving Function
When turned on, the Power Saving function enters a sleep
• 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.
Power saving indicator
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.
World Time
• The seconds count of the World Time is synchronized with the seconds count of the
Timekeeping Mode.
ElapsedTime in
Dark
Display
Operation
Illumination Precautions
• The electro-luminescent panel that provides illumination loses power after very long
use.
60 to 70 minutes Blank, with Power Saving All functions enabled, except for the
indicator (PS) flashing display
6 or 7 days
• Illumination may be hard 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.
Blank, with Power Saving Auto receive, beeper tone,
indicator (PS) not flashing 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.
• 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.
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area.
• Press any button.
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.
• Angle the watch towards your face for reading.
7
Operation Guide 3155
• 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.
UTC Differential/City Code List
City
Code
PPG
UTC
Differential
–11.0
–10.0
–09.0
City
Pago Pago
Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
HNL
ANC
YVR
LAX
YEA
DEN
MEX
CHI
–08.0
–07.0
–06.0
Mexico City
Chicago
MIA
Miami
YTO
NYC
SCL
YHZ
YYT
Toronto
–05.0
New York
Santiago
Halifax
–04.0
St. Johns
–03.5
–03.0
–01.0
RIO Rio De Janeiro
RAI
UTC
LIS
Praia
Lisbon
London
Madrid
Paris
Rome
Berlin
Stockholm
Athens
Cairo
Jerusalem
Moscow
Jeddah
Tehran
Dubai
+00.0
LON
MAD
PAR
ROM
BER
STO
ATH
CAI
JRS
MOW
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
SIN
HKG
BJS
TPE
SEL
TYO
ADL
GUM
SYD
NOU
WLG
+01.0
+02.0
+03.0
+03.5
+04.0
+04.5
+05.0
+05.5
+06.0
+06.5
+07.0
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Singapore
Hong Kong
Beijing
Taipei
+08.0
Seoul
Tokyo
+09.0
+09.5
Adelaide
Guam
Sydney
Noumea
Wellington
+10.0
+11.0
+12.0
• Based on data as of March 2008.
• The rules governing global times (GMT differential and UTC offset) and summer
time are determined by each individual country.
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