MA0410-EA
Operation Guide 3731
Power Saving
The Power Saving feature of the watch is turned on at the factory.
• Power Saving causes the watch to turn off the display automatically and enter a sleep state to save power whenever the watch is left in the
dark.
• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.
❚
How the sleep state works
• Display sleep state
The display sleep state is triggered whenever the watch is left
in the dark for three or four days.
• The display goes blank in the display sleep state.
Alarms and the hourly time signal continue to operate normally,
while the watch is in the display sleep state.
Even when the watch is in the sleep state, digital-analog time
synchronization and auto signal receive are both performed.
• Function sleep state
The function sleep state is triggered whenever the watch is left
in the dark for four days.
• Alarms and the hourly time signal are also disabled while the
watch is in the function sleep state.
• In the function sleep state, analog timekeeping is disabled, so
digital-analog time synchronization is not performed.
• Digital timekeeping functions continue to operate normally in
the function sleep state.
❚
To recover from the sleep mode
Place the watch in an area that is well-lit, press any button, or
angle the watch towards your face to illuminate the display using
the Auto Light (“To illuminate the face with the auto light switch”).
• It can take up to two seconds before the display re-appears after
you place the watch in a well-lit area.
❚
To turn power saving on and off
See the procedure under “To configure Home Time Zone settings”
for information about turning off power saving.
Leaving the watch in a drawer or anywhere else it is dark can
cause the power saving mode to trigger in order to conserve
battery power.
Modes and Display Screens
Each press of the
• The watch will automatically revert to the Timekeeping Mode if you leave the Alarm (except for the target alarm remaining time
screen), Recall, or Hand Setting screen displayed without performing any operation for about two or three minutes.
CC
C button sounds a confirmation tone and cycles through available modes in the sequence shown below.
CC
• The analog hands are not shown in the face illustrations shown in this User’s Guide.
Timekeeping Mode
Month
1/20 Second
Stopwatch Time
(Light)
24-hour Dial
Day
Year
Button
Minute
Hand
Button
Receive Indicator
Day
Month
Days of the Week
SUN: Sunday MON: Monday TUE: Tuesday
WED: Wednesday THU: Thursday FRI: Friday
SAT: Saturday
• For details about the battery level indicator, see “Battery
Level Indicator”. For details about the receive indicator, see
“Receive Indicator”.
Hand Setting Mode
Mode
Indicator
Hour Hand
(Screen Switching)
Button
Battery Level
Indicator
Button
(Mode Switching)
Second Hand
Changing Display Screen Contents
Each press of the button cycles display contents in the
sequence shown below.
Day of the Week
PM indicator
(no indicator for AM)
Seconds
Hour
Minutes
Stopwatch Mode Recall Mode
Hands move to 12 o’clock.
Elapsed Time
Moves to current level.
Returns to current seconds position.
Alarm Mode
Alarm Number
Alarm Time
TIME
DIFFERENCE
Dual Time Mode
Time Zone
Time in Current
Time Zone
1
Operation Guide 3731
Power Supply
The power supply of this watch uses a solar cell to generate
electrical power, which is stored by a rechargeable battery. Using
or storing the watch where it is not regularly exposed to light, or
allowing it to be blocked from light by your sleeve for long periods
as you are wearing it can cause the power of the rechargeable
battery to run down. To ensure stable operation, be sure to allow
the watch to be exposed to light as much as possible when you
are wearing or storing it.
Note that all data in memory and all settings are cleared
whenever you allow the level of the rechargeable battery
to drop to Level 4.
❚
Battery Level Indicator
Level 1
Level 2
Level 3
Level 4
Normal operation
enabled.
Normal operation
enabled.
Digital display, illumination,
alarms, tones (alarms,
hourly time signal), signal
reception, digital-analog
synchronization disabled.
All functions, including
timekeeping, disabled.
Face Illumination
An LED light is used to illuminate the face of the watch for easy
reading in the dark. An auto light switch automatically illuminates
the face when you angle the watch towards your eyes for reading.
❚
To illuminate the face manually
DD
Press the
D button in any
DD
mode (as long as a setting
screen is not displayed) to
illuminate the face of the
watch.
(Light)
• Pressing the D button illuminates the face regardless of whether
the auto light switch is on or off.
• You can use the procedure under “To specify the illumination
duration” to configure the illumination duration as approximately
1.5 seconds or 2 seconds.
You may hear a faint rattling sound when you move the watch
around. This sound is caused by the movement of a metal
bulb that controls operation of the auto light switch, and does
not indicate malfunction.
• In the Stopwatch Mode, the battery level indicator dial functions
as the elapsed time minute hand.
• Exposing the watch to direct sunlight or other strong light may
cause the battery level indicator to indicate a level momentarily
that is higher than the actual battery level. Because of this, you
should wait for a short while after charging to check the battery
level indicator.
• Signal reception resumes when the battery is recharged to Level
2.
• Even after the battery drops to Level 4, you will be able to resume
normal operation by charging the battery. After the digital display
appears, configure time and date settings.
❚
Start charging at Level 3!
Battery Level 3 indicates that remaining battery power is very low.
Be sure to expose the watch to light for recharging as soon as
possible after Level 3 is indicated.
❚
Flashing Recover Indicator
If you use the light or alarm a number of times during a short
period, a recover (R) indicator flashes on the display and the
following operations become disabled as battery power recovers.
• Display illumination,
• Alarm and hourly time signal
• Time calibration signal reception
• Analog-digital synchronization
Normal operation will return after the
battery recovers.
❚
To illuminate the face with the auto light
Recover Indicator
switch
The auto light switch automatically illuminates the face
whenever you angle the watch towards your eyes for reading,
but only when it is dark.
• The auto light switch does not illuminate the face when
surrounding light is bright.
You can use the procedure under “To specify the illumination
duration” to configure the illumination duration as
approximately 1.5 seconds or 2 seconds.
❚
To turn the auto light switch on and off
While any screen (besides a flashing setting screen) is on the
display, hold down the D button for about two seconds to toggle
the auto light switch on (auto light switch on indicator displayed)
and off (no indicator displayed).
Auto Light Switch
On Indicator
❚
Charging Precautions
Avoid charging the watch in the following locations, and anywhere
else where the watch may become very hot.
• On the dashboard of an automobile parked in the sun
• Very close to an incandescent light source or other sources of
heat
• In a location exposed to direct sunlight for long periods or a
location that is very hot
Note that the display panel may become black under very high
temperatures. This is temporary, and the display will appear
normal again at lower temperatures.
Depending on the light source you are using, the
case of the watch may become quite hot during
charging. Take care to guard against burn injury
after charging.
❚
To charge the battery
Point the solar panel (face) of the watch at a light source.
• Remember that even a partial blockage of the solar cell reduces
charging efficiency.
Example: Positioning the watch
Solar Cell
• The illustration shows the resin band model.
❚
Positioning Your Arm Correctly
1
With the watch on
your wrist, position it
level with the ground.
• You should be wearing the watch on the outside of your wrist
when using the auto light switch.
• Make sure that the left (9 o’clock) and
right (3 o’clock) sides of the watch are
within ±15 degrees of being parallel
with the ground. The auto light switch
may not operate properly if the angle is
greater.
Important!
• The light may be difficult to see if you turn it on under bright
sunlight.
• If you press any button or if an alarm operation starts while the
face is illuminated, illumination will turn off.
2
Rotate your arm so the watch
is angled at about 40 degrees,
so you can read its face.
At least
40
degrees
❚
Charging Guide
Starting from a full charge, the watch
should be able to continue operating
for about five months without further
charging under the conditions
described below.
Daily Use (All time values are
approximate.)
• Illumination: 1.5 seconds
• Alarm: 10 seconds
• Signal reception: 5 times
Making sure the watch is regularly
exposed to light ensures stable
operation.
• Charge Times Required to Advance to a Higher Level
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a Window on
an Overcast Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
• Note that the above charging times are for reference only. Actual
charging time depends on a variety of environmental factors.
Auto Light Precautions
• Frequent use of the auto light can run down the battery.
• The auto light switch may cause the face to illuminate when your
sleeve covers the face of the watch.
• The face may not illuminate immediately when you angle the
watch towards your face. This does not indicate malfunction.
• The face remains illuminated for the currently set duration (1.5 or
2 seconds) only, even if you leave the watch angled towards your
face.
• The face may illuminate unintentionally when you wear the watch
on the inside of your wrist, when you shake your arm, or when
you raise your arm. Be sure to turn off the auto light switch
whenever you do not need face illumination.
• Keep the auto light switch turned off whenever you are wearing
the watch on the inside of your wrist.
• Electro-static charge and magnetism can interfere with auto light
operation and even make operation impossible. If this happens
lower your arm to the starting position and then raise it again. If
you still have trouble with illumination, try lowering your arm down
to your side and then raise it to your face for reading.
Level 4 \ Level 3 \ Level 2 \ Level 1
Required Daily Charging Time
•
The following is the daily
amount of charging required
each day to support the
operations under “Daily Use”.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through
a Window
(10,000 lux)
Daylight Through a
Window on an Overcast
Day (5,000 lux)
Indoor
Fluorescent
Lighting (500 lux)
Approximate Exposure Time
1 hours
3 hours
5 hours
49 hours
– – – – – –
– – – – – –
Approximate
Exposure
Time
5 minutes
24 minutes
48 minutes
8 hours
4 hours14 hours
20 hours71 hours
2
❚
To specify the illumination duration
1. In the Timekeeping Mode,
hold down the
for about two seconds.
• This will cause the currently
selected time zone to flash on
the display, and the second
hand to move to 12 o’clock.
2. Press the
times to display the
flashing seconds count.
AA
A button
AA
CC
C button three
CC
(3 times)
Time Zone
Seconds
Operation Guide 3731
3. Press the
4. After the setting is the way you want, press the
• The second hand will move to the current time as kept
• The watch will also exit the setting screen automatically if you
BB
B button to
BB
toggle the illumination
duration between about 2
seconds (● indicator) and
1.5 seconds (no indicator).
● indicator
(Appears only on
the setting screen.)
AA
A
button to exit the setting screen.
internally, and resume normal movement from there.
do not perform any operation for about two or three minutes.
AA
How a Radio-controlled Watch Works
What is a radio-controlled watch?
Your radio-controlled watch is designed to receive a time
calibration signal that contains standard time data, and adjust its
current time setting accordingly.
Long-wave
Transmitter
Cesium
atomic clock
After the watch receives the Standard Time signal, it performs
internal calculations to determine the current time. Because of
this, there may be an error of up to one second in the
displayed time.
time
calibration
signal
Watch
Signal data
Time data
Internally
Signal is received
using built-in antenna.
Watch decodes
received data
and converts it
Decode
to time data.
Time is adjusted
according to
time data.
Calibration Signal
• The Japanese calibration signal (Call Sign: JJY) is maintained by
the National Institute of Information and Communications
Technology (NICT). It is a long wave signal transmitted 24 hours a
day from the Mt. Otakadoya transmitter (40kHz) located in
Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane
transmitter (60kHz) located on the border between Saga
Prefecture and Fukuoka Prefecture.
Note that transmission of the time calibration signal may be
interrupted occasionally due to maintenance, lightning, etc.
Reception Range
This watch can be configured to select the strongest Japanese
signal (40kHz Mt. Otakadoya signal or 60kHz Mt. Hagane signal),
and use that one for calibration. is stronger.
1000km
500km
1000km
Mt. Otakadoya
(40kHz)
Japan Transmitter
Locations
Mt. Hagane
(60kHz)
• Under optimum conditions, the calibration signal should be
receivable up to 1,000 kilometers from the transmitter. Note
that the wave is relatively weak at distances greater than
500km, so reception may be poor at long distances.
• Geographic contours, nearby buildings, seasonal conditions, the
time of day, can even make reception impossible even when you
are within range of the transmitter.
• Best reception is possible late at night.
500km
Location
Reception is difficult and may even be impossible in the locations
described below. Avoid such locations when performing signal
reception.
• You should think of your watch operating like a radio or TV when it
is receiving the calibration signal.
Among or near buildings
Inside a vehicle
(automobile, train, plane, etc.)
In a location where there is
radio interference (construction
site, airport, etc.)
If you are experiencing problems with reception, move away
from the types of locations described above to a location with
better reception, and try again.
Near high-voltage lines
Next to a household
appliance or office equipment
(TV, speaker, fax, computer,
cell phone, etc.)
Near mountains
Receiving the Calibration Signal
There are two methods you can use to receive the time calibration
signal.
• Auto receive (Reception is performed automatically at
midnight, 1:00, 2:00, 3:00 and 4:00 each morning.)
•
Manual receive (You initiate reception using
• If reception is not successful for any of the normal auto receive
operations shown above, auto receive is performed one more
time at 5:00 a.m.
• The watch is set up for auto receive at the factory, so all you need to
do is to place it in a location that allows good reception each night.
❚
To position the watch for optimum reception
Remove the watch from your wrist and place it somewhere so its
top (12 o’clock side, where the antenna is located) is facing
approximately in the direction of the signal transmitter. Keep the
watch away from metal objects.
Resin band
Metal band
• Orienting the watch so it is sideways to the transmitter makes it
more difficult to receive the signal.
• Do not move the watch while it is receiving the calibration signal.
BB
B button operation.)
BB
❚
Time Required for Reception
A calibration signal receive operation takes anywhere from about
two to seven minutes.
• Note that when “A” (Auto Select) is specified as the transmitter
selection mode, signal reception can take up to 14 minutes.
• See “Configuring Auto Receive Settings” for more information.
❚
To perform manual receive
In the Timekeeping Mode, hold
BB
down the
B button for about
BB
two seconds.
•
The watch will beep and reception
will start. The receive ( ) indicator
will appear on the display to indicate
reception conditions.
❚
To interrupt reception
BB
Press the
B button.
BB
• All other buttons besides B are disabled during signal reception.
When reception is successful
The watch will terminate reception and adjust the current time.
Next it will beep and then display the date and time that the
adjustment was performed.
• The receive indicator ( ) will remain on the display to indicate
that reception was successful.
• The second hand will move to the correct position in accordance
with the digital time, and resume normal movement from there.
Reception Error
The will display “ ” without adjusting the time setting when
signal reception is unsuccessful for some reason.
•
The watch will return to the Timekeeping Mode screen automatically
if you do not perform any operation for about one or two minutes.
3
Operation Guide 3731
❚
Receive Indicator
The receive indicator cycles from
“Unstable” through “Stable” as
shown below while reception is in
progress. How far it cycles depends
on the signal strength. Keep the
watch in a location where reception
is stable while reception is in
progress.
Unstable Stable
• Even under optimum reception conditions, it can take about 10
seconds for reception to stabilize.
• Use the receive indicator to check reception status and to
determine the best location for signal reception.
• Note that weather, the time of day, surroundings, and other
factors can all affect reception.
❚
Analog Hand Operation during Signal Reception
• Second Hand
Moves to 12 o’clock and stops when signal reception starts.
•
Normal second hand movement resumes after reception is complete.
• If a button is pressed to terminate reception, the second hand
moves to the second count of the digital time and resumes normal
movement.
• Minute and Hour Hands
These hands operate normally.
The second hand does not move during signal reception.
Receive Indicator
Auto Receive Settings when the Home Time Zone
is +9.0
• A (AUTO)
Auto receive turned on with automatic selection of either the
Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal
(60kHz), whichever is strongest.
• J40
Auto receive turned on for the Mt. Otakadoya signal (40kHz).
• J60
Auto receive turned on for the Mt. Hagane signal (60kHz).
• OFF
Auto receive turned off.
❚
To view the last reception date and time
In the Timekeeping Mode, press the
• This causes the display to start alternating between the last
reception date and the last reception time at two-second
intervals.
• To return to the Timekeeping Mode, press the B button again.
• The watch will return to the Timekeeping Mode automatically if
you do not perform any operation for about one or two minutes.
2-Second
interval
Last reception date
BB
B button.
BB
Last reception time
Calibration Signal Reception
Precautions
• Auto receive can be performed while the watch is in the
Timekeeping Mode or Dual Time Mode only.
• When a time calibration signal is received, the watch corrects its
digital time setting first, and then adjusts the analog time setting
accordingly. In order to ensure that the analog time matches the
digital time, make sure you adjust the analog time to match the
digital time before performing signal reception.
• The analog second hand does not move during signal reception,
and so timekeeping may be off.
• Pressing any button while auto reception is in progress will cause
the watch to beep and then exit the receive operation.
• Make sure you are within the range of the calibration signal
transmitter before performing the reception operation. Remember
that geographic contours, nearby buildings, seasonal conditions,
the time of day, can even make reception impossible even when
you are within range of the transmitter.
• Proper reception may be impossible if there is something blocking
the signal. If reception is unsuccessful, try again.
• This watch is designed to adjust its current time setting in
accordance with the calibration signal transmitted in Japan only. It
operates like a standard (non-radio controlled) watch outside of
the range of the receivable time calibration signal transmitters.
• When the watch is unable to adjust its time signal using the
calibration signal for some reason, timekeeping accuracy is within
±15 seconds per month.
• Strong electrostatic charge can cause timekeeping error.
• Signal reception is cancelled if the alarm starts to sound while it is
being performed.
• The watch’s calendar shows dates up to the year 2099.
Attempting a receive operation after that causes an error.
Configuring Auto Receive Settings
Use the procedure below to turn auto receive of the time
calibration signal on or off. When +9.0 (Tokyo) is selected as the
time zone, you can also specify the transmitter selection mode,
which controls which Japanese transmitter signal should be used
for time calibration.
• For information about selecting a time zone, see
“Configuring Home Time Zone Settings”.
• The initial factory default settings for auto receive are Home Time
Zone = +9 (Tokyo); Auto Receive = A (On)
• The following procedure can be performed only when +9.0, is
selected as the Home Time Zone.
❚
To configure auto receive settings
1. In the Timekeeping Mode,
• This causes the display to
• The watch will return to the
2. Hold down the
• This will cause the current
BB
press the
B button.
BB
start alternating between the
last reception date and last
reception time.
Timekeeping Mode
automatically if you do not
perform any operation for
about one or two minutes.
AA
A button
for about two seconds.
auto receive setting to flash
on the display.
AA
Troubleshooting
I can’t perform manual calibration signal reception.
Possible Causes
• The watch is not in the Timekeeping Mode.
• +9.0 (Tokyo) is not selected as the time zone.
Recommended Action
• Enter the Timekeeping Mode before performing manual reception.
• Select the correct time zone Use the procedure under
“Configuring Home Time Zone Settings” to select +9.0 (Tokyo) as
the time zone.
Though I have auto receive turned on, does not appear on
the display.
Possible Causes
• is displayed after a time calibration is successfully received
and the time setting is adjusted.
• is not displayed if no signal reception operations are
successful for one day. is cleared from the display at 3:00 a.m.
each day.
• Auto reception is not performed if the watch is not in the
Timekeeping Mode or Dual Time Mode.
• is cleared from the display if you perform a manual receive
operation.
Recommended Action
• Make sure the watch is within the reception range of a time
calibration signal transmitter.
• During the auto receive times, keep the watch in a location where
reception is good.
• During the auto receive times, make sure the watch is in the
Timekeeping Mode or Dual Time Mode.
DD
3. Use the
to cycle through the
available auto receive
settings.
4. When the setting is the
way you want, press the
AA
A button.
AA
• This will exit the setting
screen and return to the last
reception date and time
screens.
• To return to the Timekeeping
Mode, press the B button
again.
• The watch will return to the
Timekeeping Mode
automatically if you do not
perform any operation for
about two or three minutes.
Time calibration signal reception is successful, but the time
setting is not correct.
Possible Causes
• If the time is one hour off, summer time (DST) is turned on.
• If there time is off by more than one hour, you may have the
wrong time zone selected.
Recommended Action
• Use the procedure under “Configuring Home Time Zone Settings”
to turn off summer time or to select the correct time zone.
• Is the correct time zone selected?
The auto receive settings can’t be configured.
Possible Causes
• Auto receive settings cannot be configured unless +9.0 (Tokyo) is
selected as the Home Time Zone.
Recommended Action
• Use the procedure under “Configuring Home Time Zone Settings”
to select +9.0 as the time zone.
• Check the auto signal reception setting whenever you have
problems with signal reception or when the time setting produced
by signal reception is incorrect.
• The initial factory default configuration of the reception settings
are shown below. You do not need to change these settings if
you use the watch in Japan.
Auto Receive
Time Zone
Summer Time
D and
DD
BB
B buttons
BB
Auto Japan transmitter select
(40kHz/60kHz)
Tokyo, Japan
Auto switching in accordance
with signal data
4
Operation Guide 3731
Using the Alarms and the Hourly Time Signal
Using the Alarms
You can set up to five independent daily alarms. An alarm sounds
for 10 seconds when an alarm time is reached.
❚
To view the alarm time or target alarm time
In the Alarm Mode, press the
alarm screens in the sequence shown below.
• The alarm number appears first, followed by the current alarm
time setting.
Alarm 1
(AL1)
BB
B button to cycle through the
BB
Alarm Number
Alarm 2
(AL2)
Alarm 3
Alarm Time
(AL3)
Types of Alarms
• Daily Alarms (AL 1, AL 2, AL 3)
The watch beeps for 10 seconds when the alarm time is
reached.
• Target Alarm (AL 4)
With a target alarm, the time remaining until the alarm time
counts down on the display. The watch beeps for 10 seconds
when the alarm time is reached.
• Snooze Alarm (AL 5)
With the snooze alarm, the watch beeps for 10 seconds when
the alarm time is reached, and up to seven times at fiveminute intervals thereafter. Pressing any button stops the
beeper, but the alarm will sound again after five minutes.
About the Target Alarm Time Screen
When you turn on the target alarm (AL 4), the display shows the
alarm time momentarily and changes to show how much time
remains until the target alarm time.
Alarm TimeAlarm Number Remaining Time
❚
To set an alarm time
1. In the Alarm Mode, use the
BB
B button to scroll
BB
through the alarm screens
(AL1 to AL5) until the one
you want is displayed.
2. Hold down the
for about two seconds
until the hour digits of the
alarm time start to flash.
• This is the setting screen. At
this time the displayed alarm
turns on automatically. If you
have the snooze alarm
displayed (AL 5), the snooze
indicator (SNZ) also appears
at this time.
AA
A button
AA
Hour
3. Use the
• Holding down either button
• When setting the hour, make
• Alarm mode times are
4. Press the
DD
D (+) and
DD
buttons to change the
hour setting.
scrolls the setting at high
speed.
sure you specify AM (no
indicator) or PM (P) correctly
when using 12-hour
timekeeping, or that you
specify the correct 24-hour
time.
displayed in the same format
(12-hour or 24-hour) that you
selected in the Timekeeping
Mode.
CC
C button so the
CC
minute setting flashes.
BB
B (–)
BB
(Back)
(Forward)
Minute
Hourly Time
Signal (:00)
5. Use the
• Holding down either button
6. When the setting is the
• This exits the setting screen.
• An alarm is turned on
• The display also will exit the
DD
D (+) and
DD
buttons to change the
minute setting.
scrolls the setting at high
speed.
way you want, press the
AA
A button.
AA
automatically whenever you
change its settings.
setting screen automatically if
you do not perform any
operation for about two or
three minutes.
BB
B (–)
BB
Snooze Alarm
(AL5)
Target Alarm
(AL4)
(Back)
(Forward)
❚
To turn an alarm on or off
1. In the Alarm Mode, use the
screen for the alarm (AL 1 through AL 5) you want to turn
on or off.
2. Press the
• Turning on an alarm also causes its “on” indicator to appear.
• Note that the “on” and “oF” indicators appear in the Alarm Mode
only. The snooze indicator (SNZ) remains on the display in all
modes.
AA
A button to toggle the displayed alarm on or
AA
off.
The snooze alarm screen also has a snooze indicator (SNZ).
Alarm 1 Screen
Shows “on” when the alarm is on.
Shows “oF” when the alarm is off.
BB
B button to display the
BB
Snooze Alarm Screen
Snooze Indicator
❚
To stop the alarm beeper
Press any button while the beeper is sounding to stop it.
• In the case of the snooze alarm the alarm will sound again in
about five minutes. The snooze indicator flashes during the
periods between alarms.
• The snooze alarm will be canceled automatically when any of the
following occurs while the SNZ indicator is flashing on the display.
• If you turn off the snooze alarm in the Alarm Mode
• If you enter the Alarm Mode, display the snooze alarm screen,
and then display the setting screen
• If you enter the Timekeeping Mode and then display the setting
screen
❚
To test the alarm
In the Alarm Mode, hold down the B button to sound the alarm.
Using the Hourly Time Signal
The hourly time signal causes the watch to beep every hour on the
hour.
❚
To turn the hourly time signal on and off
1. In the Alarm Mode, use the
screen for the hourly time signal (:00).
2. Press the
• Turning on the hourly time signal causes its “on” indicator to
• Note that the “on” and “oF” indicators appear in the Alarm
AA
A button to toggle the hourly time signal on
AA
or off.
appear.
Hourly Time Signal Screen
Shows “on” when the hourly time signal is on.
Shows “oF” when the hourly time signal is off.
Mode only.
BB
B button to display the
BB
5
Operation Guide 3731
Using the Stopwatch
The stopwatch measures elapsed time in units of 1/100 second up to 59 minutes, 59.99 seconds (60 minutes). When the maximum limit is
reached, the elapsed time automatically returns to zero and timing continues from there. Performing a lap/split operation automatically
stores lap/split times in memory (up to 50 records). A simple operation lets you recall lap/split time records when you need them.
Entering the Stopwatch Mode causes the hands used for
stopwatch timing to move automatically to the 12 o’clock
position.
• If a stopwatch timing operation is in progress when you
enter the Stopwatch Mode, the hands will move to the
current elapsed time.
Timekeeping Mode Stopwatch Mode
❚
To perform stopwatch operations
Start Lap/Split Time Recording Stop
Press the button. Press the button.Press the A button.
• This starts the elapsed time operation.
• Starting a new elapsed time operation
from zero deletes all lap and split time
data currently in lap/split time memory.
Lap Time Display
Split Time Display
(Start)
(Start)
• This freezes the current time on the
digital display for five seconds, and
stores it in lap/split time memory.
Elapsed time measurement continues
internally at this time.
• Though the digital time freezes, the
stopwatch hands continue to move.
(Lap)
(Split)
Lap Times
A lap time is the time that elapses during a specific portion of the
race, such as a lap around a track.
Example: Measuring the lap time for one lap of a track event,
car race, etc.
Lap 1
Start Stop
Lap 2
Lap 3
Split Times
A split time is the time elapsed from the start, up to any point
along the course of the race.
Example: Measuring splits every 10 kilometers
Split 1
Start Stop
Lap Time
Split Time
Lap Number
Split 2
Split 3
• This stops the elapsed time operation.
• Pressing the A button while timing is
stopped resets the stopwatch.
Resetting the stopwatch stores the final
elapsed time that is on the display to
lap/split time memory.
(Reset)
(Reset)
(Stop)
(Stop)
How Hands Operate in the
Stopwatch Mode
In the Stopwatch Mode, elapsed time is indicated both by the
digital display and by the hands of the watch. Resetting the
stopwatch to zero causes the hands to return to the 12 o’clock
position.
• In the Stopwatch Mode, the second hand indicates elapsed
seconds, while the battery level indicator dial indicates elapsed
minutes.
• When you start an elapsed time operation in the Stopwatch Mode
and when you exit or enter the Stopwatch Mode while an elapsed
time operation is in progress, the stopwatch 1/20-second hand
rotates for one minute. After that it stops at the 12 o’clock position.
Stopping the elapsed time operation causes the hand to move to
the current 1/20-second position.
Stopwatch
1/20-second
Hand
Stopwatch
Minute Hand
❚
Elapsed Time Measurement
Stop ResetStart
Cumulative Time Measurement
Pressing the B button to restart the stopwatch without resetting it
to all zeros resumes elapsed time measurement from where it was
last stopped.
❚
Recording Lap/Split Times
Lap/SplitLap/Split ResetStopStart
❚
Recording the Times of 1st and 2nd
Place Finishers (Split Time Display)
Start 1st finisher
(Displays time
of 1st finisher.)
Lap/Split Time Memory
You can store up to 50 lap/split times in memory. Performing a lap/
split time operation when there are already 50 records in memory
automatically deletes the oldest record to make room for the new
times.
2nd finisher
(Displays time
of 2nd finisher.)
Digital display
(minutes,
seconds,
1/100 second)
Stopwatch
Second Hand
Reset
Selecting Lap or Split Time Display
Before starting an elapsed time operation in the Stopwatch Mode,
you should select display of either lap times or split times.
While the Stopwatch Mode screen shows all zeros, press
AA
the
A button to toggle between the lap time (“LAP”
AA
indicator appears) and split time (“SPL” indicator appears)
displays.
• Regardless of whether you select display of lap times or split
times, both are stored in lap/split time memory during the elapsed
time operation.
Lap Time Display Split Time Display
Viewing Lap/Split Time Memory
Contents
Use the following procedure to recall lap/split time memory
contents.
1. Use the
• This displays the last (newest)
2. Use the
• Each press of the B button
• Holding down the B button
• When you stop at a record, its
Example: When there are 10 lap/split time records in memory
(Newest record)
CC
C button to enter
CC
the Recall Mode.
lap/split time that you
recorded.
BB
B button to scroll
BB
through lap/split time
record numbers.
advances to the next older
record.
scrolls through records at high
speed.
lap time or split time will
appear in place of the record
number after a few moments.
LAP 10
Lap Number
LAP 9 LAP 1
6
Operation Guide 3731
3. While any record is displayed, you can press the
button to toggle between the lap time and split time
displays.
AA
A
AA
Split TimeLap Time
Clearing Lap/Split Time Memory Records
• Starting a new elapsed time operation from zero deletes all lap
and split time data currently in lap/split time memory.
• You can also manually clear lap/split time memory by holding
down the A and B buttons at the same time for about two
seconds.
• “LAP – – ” appears on the screen after lap/split time memory is
cleared.
• Note that you cannot delete individual lap/split time memory
records.
Dual Time Mode
The Dual Time Mode provides you with easy access to the current
time in any one of 29 times zones around the globe.
• When you enter the Dual Time Mode, the screen for the time zone
that was displayed when you last exited the mode appears first.
• The seconds count in the Dual Time Mode is linked with the
Timekeeping Mode seconds count.
• Dual Time mode times are displayed in the same format (12-hour
or 24-hour) that you selected in the Timekeeping Mode.
Important!
• If a Dual Time Mode time is incorrect, check the time setting and
time zone setting of the Timekeeping Mode, and correct them if
necessary.
• For information about selecting a Time Zone and setting the
time, see “Configuring Home Time Zone Settings”.
❚
To search for a time zone
In the Dual Time Mode, press the
time zones.
• If you stop at a time zone, the current time will appear in place of
the time differential after a few moments.
• Holding down the B button scrolls through time zones at high
speed.
• The colon between the hour and minute digits flash in the Dual
Time Mode.
• Pressing the A button in the Dual Time Mode displays the time
differential of the currently selected time zone for about one
second.
Time Zone
BB
B button to scroll through
BB
(Forward)
Time in selected time zone
Using Summer Time (DST)
Summer time, or Daylight Saving Time (DST) as it is called in
some countries, calls for setting clocks ahead one hour during the
summer season. Note that the use of summer time depends on
the country and even the local area.
❚
To turn summer time on and off
1. In the Dual Time Mode,
2. Hold down the
• You can turn summer time on
BB
use the
B button to
BB
display the time zone
whose summer time
setting you want to
change.
AA
A button
for about two seconds to
toggle summer time on or
off. The “DST” indicator
appears on the display
and timekeeping in the
selected time zone is
advanced by one hour
when summer time is
turned on.
or off independently for each
Dual Time Mode time zone.
Note, however, that you
cannot turn on summer time
for the “G0.0” (Greenwich
Mean Time) time zone.
AA
DST Indicator
Time Zone List
Time
Zone
+12.0
+11.0
+10.0
+9.5
+9.0
+8.0
+7.0
+6.5
+6.0
+5.5
+5.0
+4.5
+4.0
+3.5
+3.0
+2.0
• The contents of the above table are current as of June 2004.
• Time zones in the above table are in accordance with Universal
Time Coordinated (UTC).
Cities
Wellington, Christchurch
Noumea, Port Vila
Sydney, Guam
Adelaide
Tokyo, Seoul,Pyongyang
Hong Kong, Singapore,
Kuala Lumpur, Beijing,
Taipei, Manila
Bangkok, Jakarta,
Hanoi
Yan gon
Dakar
Delhi
Karachi
Kabul
Dubai, Qatar
Teheran
Jeddah, Kuwait, Moscow
Athens, Cairo,
El Salaam, Helsinki,
Beirut
Time
Zone
Paris, Rome, Madrid,
+1.0
+0.0
G 0.0
–1.0
–2.0
–3.0
–4.0
–5.0
–6.0
–7.0
–8.0
–9.0
–10.0
–11.0
London, Dublin
Greenwich Mean Time
Rio de Janeiro,
Sao Paulo, Buenos Aries
Caracas, San Diego
New York, Montreal,
Miami, Boston
Chicago, Houston,
Mexico City
Denver, El Paso,
Edmonton
Los Angeles,
San Francisco,
Las Vegas
Anchorage, Nome
Honolulu, Papeete
Pago Pago
Cities
Frankfurt
Azores
7
Operation Guide 3731
Configuring Home Time Zone Settings
You can use the following procedure to set the current time and
date of the Timekeeping Mode Home Time Zone.
• Always use the Timekeeping Mode to set and adjust current time
and date settings.
If you are planning to manually change both the digital and
analog settings, be sure to adjust the digital setting first.
❚
To configure Home Time Zone settings
1. In the Timekeeping Mode,
hold down the
for about two seconds
until the Home Time Zone
setting starts to flash on
the display.
• This is the setting screen.
• The second hand moves to
12 o’clock at this time.
7. While the 12/24-hour
setting is selected, press
DD
the
D button to toggle the
DD
timekeeping format
between 12-hour (“12H”
indicator) and 24-hour
(“24H” indicator).
8. While the seconds are
selected, press the
button to reset them to 00
in accordance with the
time signal on the radio,
TV, etc.
• Pressing the D button while
the seconds count is in the
range of 30 to 59 resets it to
00 and also adds 1 to the
minutes. Pressing the D
button in the range of 00 to 29
resets the seconds count
without changing the minutes.
AA
A button
AA
DD
D
DD
Home Time Zone
12/24 Timekeeping Indicator
Resets to 00.
2. Use the
• See the “Time Zone List”
• Holding down either button
3. Press the
9. While the hour, minutes,
• Holding down either button
• When setting the hour, make
• You can set a year in the range of 00 (2000) to 99 (2099). The
• The watch automatically makes adjustments for leap years
10.
DD
D (Westward)
DD
BB
and
B (Eastward) buttons
BB
to scroll through the time
zones until the one whose
time you want to set is
displayed.
for more information about
time zones.
scrolls the setting at high
speed.
CC
C button so the
CC
summer time setting is
displayed.
year, month, or day setting
is flashing, use the
button and
to change the setting.
scrolls the setting at high
speed.
sure you specify AM (no
indicator) or PM (P) correctly
when using 12-hour
timekeeping, or that you
specify the correct 24-hour
time.
day of the week is set automatically in accordance with the
date you set.
and month lengths.
While the Power Saving
setting is selected, press
the
ON and OFF.
BB
B (–) button
BB
DD
D button to toggle it
DD
DD
D (+)
DD
(Eastward)
(Westward)
+9.0 = Tokyo
Hour Minutes
(Forward)
(Back)
on = Power Saving On
OFF = Power Saving Off
4. Press the
• DS A
This setting enables the auto summer time setting, which
turns summer time on or off in accordance with the received
time calibration signal.
• DS OFF
This setting turns off summer time, and displays the current
time normally.
• DS On
This setting turns on summer time.
• Selecting this setting displays the DST indicator, and
advances the current time setting by one hour.
• Note that pressing the D button in the above step while any time
zone other than +8.0, +9.0, –5.0, –6.0, –7.0, –8.0, or –10.0 will
simply toggle the summer time setting between DS OFF and DS
On.
11.
• This exits the setting screen.
• The display also will exit the setting screen automatically if
Digital-Analog Synchronization
The watch automatically adjusts its analog setting to match the
current digital time setting.
• When adjusting the analog time, the hands may move clockwise
or counterclockwise.
• Depending on how many hours different the digital and analog
time settings are, it may take some time for the analog hand
setting procedure to be finished.
• After adjustment of the hour and minute hand, the second hand
will adjust automatically to the digital time.
DD
D button to
DD
cycle through the summer
time settings until the one
you want is displayed.
When the setting is the way you want, press the
button.
you do not perform any operation for about two or three
minutes.
AA
A
AA
5. Use the
6. Use the
CC
C button to cycle
CC
through the time and date
settings shown below.
Each press of the
button causes the
applicable setting to flash.
Time Zone 12/24-hour
Power Saving
Day Month Year Minute Hour
selected setting.
CC
C
CC
Summer Time
DD
BB
D and
B buttons to change the currently
DD
BB
Seconds
Adjusting the Analog Hand
Positions
You can use the Hand Setting Mode to manually adjust the analog
hand positions then they do not match the digital time.
1. Use the
2. Hold down the
3. If the second hand does
• Each press of the D button
• Holding down the D button
CC
C button to enter the Hand Setting Mode.
CC
AA
A button
for about two seconds
until the second hand
stops at the 12 o’clock
position and “– 00–”
flashes on the digital
display.
not align with the 12
o’clock position by itself,
use the
adjust it.
advances the second hand by
one second.
advances the second hand at
high speed.
AA
DD
D button to
DD
12 o’clock
(Forward)
8
Operation Guide 3731
4. Press the
5. Use the
• Each press of the D button
• Holding down either button
• Note that the 24-hour hand
CC
C button to
CC
move the flashing
between the hour and
minute settings.
DD
D (+) and
DD
buttons to adjust the hour
and minute hand
positions.
moves the hands 20 seconds
clockwise, while the B button
moves them 20 seconds
counterclockwise.
moves the hand at high
speed.
moves in accordance with
movement of the hour and
minute hands. One full
rotation of the 24-hand is
24 hours. When setting the
hour and minute hands, make
sure that you also keep an
eye on the 24-hour hand to
make sure that you set the
analog time so it correctly
matches the am/pm time on
the digital display.
BB
B (–)
BB
Hour Hand
24-hour hand
Minute Hand
(Forward)
(Back)
High-speed Hand Movement
• While holding down the D button to start high-speed clockwise
movement of the hands, press the B button to lock the
high-speed movement.
• While holding down the B button to start high-speed
counterclockwise movement of the hands, press the D button to
lock the high-speed movement.
• High-speed movement will continue until it completes a 12-hour
cycle, or until you press any button to stop it.
6. Press the
AA
A button to
AA
select the stopwatch
1/20-second hand for
adjustment.
7. If the 1/20-second hand is
not aligned with the
12 o’clock position, use
DD
the
D button to adjust it.
DD
• Each press of the D button
advances the 1/20-second
hand by one step.
• Holding down the D button
advances the hand at high
speed.
8. Press the
CC
C button to
CC
advance to setting of the
stopwatch minute hand
for adjustment.
Stopwatch 1/20
Second Hand
12 O’clock
(Forward)
9. If the stopwatch minute
hand is not aligned with
the 12 o’clock position,
DD
use the
D button to
DD
adjust it.
• Each press of the D button
advances the stopwatch
minute hand by one step.
• Holding down the D button
advances the hand at high
speed.
10.
When all the settings are the way you want, press the
button.
• This exits the setting screen and automatically synchronizes
the minute hand with the current seconds count.
• At this time, the second hand will adjust automatically to the
digital time.
• The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
Stopwatch
Minute Hand
12 O’clock
(Forward)
AA
A
AA
9
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