Casio 2931 User manual

Operation Guide 2931
1
3. Tips on how to keep the battery charged.
•Try to ensure that the watch is always exposed to enough light to
keep its battery indicator at LEVEL 1 or LEVEL 2. Some of the
watch’s functions are disabled when battery power drops to
LEVEL 3.
Light
Level 1
Level 2
Level 3
Level 4
Battery Indicator
Rechargea-
ble battery
All functions
enabled
Some
functions
disabled
•Whenever you are not wearing the watch on your wrist, position it
so the face (solar cell) is pointed in the direction of a source of
bright light.
Light
Solar Cell
Leave the watch under
fluorescent lighting, near a
window, etc.
•When wearing the watch, try to keep your sleeve from blocking its
face (solar cell).
Charging efficiency is significantly
reduced even if the face of the
watch is only partially covered by
your sleeve.
Your watch runs on electrical power generated from light and stored by a rechargeable battery.
To ensure stable operation, make sure that the solar cell of the watch is exposed to light as much as possible.
1. How the solar cell and battery work
When exposed to light
Light
Power supplied to watch
Solar cell
Electrical energy
Rechargea-
ble battery
Charge
When not exposed to light
Power supplied to watch
Discharge
Rechargea-
ble battery
Your watch continues to operate, even when it is not exposed to
light. Leaving the watch in the dark can run down its battery and
cause functions to become disabled.
2. Avoid overuse of display illumination.
•Over use of display illumination can run down the battery.
Power supplied to watch
Discharge
Rechargea-
ble battery
The following shows approximately how much exposure to light is
required to recharge the battery by the amount used by one
display illumination operation.
•Sunlight through a window: 5 minutes
•Indoor fluorescent lighting: 50 minutes
Care is required when using the full auto light switch, which
can cause frequent display illumination.
Keep your watch exposed to light!
Each press of the CC
CC
Cbutton sounds a confirmation tone and cycles through available modes in the sequence shown below.
•The watch will revert to the Timekeeping Mode automatically if you leave it in the Tide/Moon Graph Mode or Alarm Mode for about two or
three minutes without performing any operation.
Graphic Area Day of the Week
Receive
indicator
Month, Day
Moon Graph
Battery
Indicator
PM indicator
(no display for AM) Hour, Minute, Second
(Light)
(Display switching)
(Mode switching)
•For information about temperature sensor calibration, see
“Setting the Home City Time and Date”.
•For information about the Tide Graph, see “Using the Tide Graph”.
•When you enter the Timekeeping
Mode from the Alarm Mode, the area
name (see the “Area List”) appears
first. After a short while, the display
changes to the date display.
Timekeeping Mode
Tide GraphTemperature
Temperature Measurements
While the temperature screen is displayed, the watch takes
temperature measurements every two minutes.
•When measuring outdoor temperatures, remove the watch
from your wrist and place it in a location where its readings will
not be affected by body temperature, sweat (water droplets),
direct sunlight, etc.
•After removing the watch from your wrist, it takes about 20 to
30 minutes before the temperature of the watch becomes the
same as the outside temperature.
button button
button button
•For details about the Moon Graph, see “Using the Moon
Graph (Moon Phase)”.
•For details about the battery indicator, see “Battery
Indicator”.
•For details about the receive indicator, see “Receive
Indicator”.
•Elements in the graphic area appear and disappear to
indicate the passage of seconds.
Switching between Display Screens
Each press of the cycles screen contents as shown below.
Tide/Moon Graph Mode Timer Mode
Stopwatch ModeWorld Time ModeAlarm Mode
Mode Name Year
PM indicator
(A for AM)
Month, Day
Tide Graph
Moon Graph
Mode Name
Timer Time
Mode Name
Time
City Code
World Time
Alarm Number
Alarm Time
Modes and Display Screens
MA0509-EA

Operation Guide 2931
2
Start charging at Level 3 or 4!
Battery Level 3 or 4 indicates that remaining battery power is very
low. Be sure to expose the watch to light for recharging as soon as
possible after the Level 3 or Level 4 indicator starts to flash.
Frequent display of the recover indicator also means that the
battery is low. Expose the watch to light to charge the battery.
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
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.
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 exposed to light regularly or
allowing it to be blocked from light by your sleeve 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 5.
Flashing Recover Indicator
If you use the light or alarms a number of times during a short
period, a RECOV indicator flashes on the display and the following
operations become disabled as battery power recovers.
•Illumination
•Alarm and hourly time signal
•Timer Mode progress alert and
time up alarm
•Temperature measurement
•Time calibration signal reception
Normal operation will return after the
battery recovers.
Battery Indicator
All functions enabled.
All functions enabled.
Illumination, alarms and other tones,
temperature measurement, and time
calibration signal reception disabled.
Display, illumination, alarms and other
tones, temperature measurement, and
time calibration signal reception disabled.
All functions, including timekeeping,
disabled.
Level
1
Level
2
Level
3
Level
4
Level
5
•Exposing the watch to direct sunlight or other strong light may
cause the battery level indicator to indicate a level that is
momentarily higher than the actual battery level. Because of this,
you should wait for a short while after charging to check the
battery level indicator.
•Even if the battery level drops all the way to Level 5, you still will
be able to recharge the battery and use the watch again.
•If you start charging from Level 5, the display of the watch will
flash when the battery reaches Level 4. Note, however, that the
watch’s functions will still remain disabled at this time, and you
should continue to expose the watch to light so the battery can
charge up the Level 2 or Level 1.
Recover
Indicator
Power Supply
Charging Guide
Starting from a full charge, the watch
should be able to continue operating
for about eight months without
further charging under the example
conditions described below.
Example Daily Use
•Illumination: 1.5 seconds/day
•Alarm: 10 seconds/day (alternate
between beep and
vibration alert every day)
•Signal Reception: 10 minutes/day
•Digital Display: 18 hours/day
Making sure the watch is exposed
to light regularly ensures stable
operation.
•Charge Times Required to Advance to a Higher Level
Approximate Exposure Time
Level 5 \Level 4 \Level 3 \Level 2 \Level 1
– – – – – –
2 hours
8 hours18 hours
6 hours
10 hours
126 hours
41 hours91 hours
83 hours184 hours
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Overcast Daylight
Through a Window
(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.
Required Daily Charging Time
• The following is the daily amount
of charging required each day to
support the operations under
“Example Daily Use”.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Overcast Daylight
Through a Window
(5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
5 minutes
24 minutes
48 minutes
8 hours
Approximate
Exposure Time
Power Saving causes the watch to enter a sleep state automatically in order to save power whenever it is left in the dark. The Power
Saving feature of the watch is turned on at the factory.
•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 about one hour between the hours of 10 p.m. and 6 a.m.
•The watch does not enter the
sleep state if it is in the Timer
Mode or Stopwatch Mode.
•The display sleep state
causes the display to go
blank, except for a flashing
Power Saving indicator.
Alarm, hourly time signal, and
Timer Mode progress alert
and time up alert operate
normally in the display sleep
state.
•Function sleep state
The function sleep state is triggered whenever the watch is left in
the dark for six or seven days.
•The Power Saving indicator stops flashing and remains on the
display. Alert, hourly time signal, and Timer Mode progress
alert and time up alert do not operate in the function sleep
state, and auto receive of the time calibration signal is not
performed.
•Digital timekeeping functions continue to operate normally
in the function sleep state.
❚ To recover from the sleep state
Place the watch in an area that is well-lit, press any button, or
angle the watch toward your face to illuminate the face of the
watch using the full auto light switch (“Positioning Your Arm
Correctly”).
•It can take up to two seconds before display figures re-appear
after you place the watch in a well-lit area.
❚ To turn Power Saving on and off
Use the procedure under “Setting the Home City Time and Date”
to turn Power Saving on or off.
Leaving the watch in a drawer or anywhere else it is dark can
cause Power Saving to trigger in order to conserve battery
power.
Power Saving Indicator
Power Saving

Operation Guide 2931
3
❚ Positioning Your Arm Correctly
•You should be wearing the watch on the outside of your wrist
when using the full 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 full auto light switch may not
operate properly if the angle is
greater than 15 degrees.
Important!
•Illumination may be difficult to see under bright sunlight.
•Illumination turns off automatically if you press any button
causing a confirmation tone to sound or if an alert operation
is performed.
•Illumination will not turn on while manual receive is in
progress.
•You may notice a slight sound from the watch while
illumination is turned on. This is the sound of EL panel
vibration and does not indicate malfunction.
Full Auto Light Precautions
•Frequent use of the full auto light switch can run down the battery.
•The full auto light switch is disabled while you are viewing tide
data.
•The full auto light switch may turn on illumination when the face of
the watch is shaded by your sleeve.
•Illumination may not turn on immediately when you angle the
watch towards your face. This does not indicate malfunction.
•Illumination remains on for the specified duration (1.5 seconds or
2.5 seconds) only, even if you leave the watch angled towards
your face.
•The full auto light switch is disabled automatically whenever the
battery indicator reaches Level 4.
•Illumination may turn on 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 full auto light switch
whenever you do not need illumination.
•Keep the full 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 full auto
light switch 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.
Rotate your arm so the watch
is angled at about 40 degrees,
so you can read its face.
With the watch on your
wrist, position it parallel
with the ground.
11
11
122
22
2
At least 40
degrees
An EL (electro luminescent) panel is used to illuminate the display
of the watch for easy reading in the dark. The full auto light switch
automatically turns on illumination whenever you angle the watch
towards your face for viewing, while it is dark.
❚ To turn on illuminination manually
In any mode, press the BB
BB
B
button.
•This turns on illumination.
•You can specify 1.5 seconds or
2.5 seconds as the illumination
duration (“To specify the
illumination duration”).
•Pressing the Bbutton turns on illumination regardless of whether
the full auto light switch is on or off.
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 full auto light switch, and
does not indicate malfunction.
Using the Full Auto Light Switch
The full auto light switch turns on illumination automatically
whenever you angle the watch towards your face for reading,
but only when it is dark.
•The full auto light switch does not turn on illumination when
surrounding light is bright.
The full auto light switch turns on illumination for the specified
illumination duration in all modes when the watch is angled
towards the face.
❚ To turn the full auto light switch on or off
In any mode (except when a settings screen is on the display),
hold down the Bbutton for about three seconds to toggle the
auto light switch on (AUTO EL indicator displayed) and off (no
indicator displayed).
Full Auto Light
On Indicator
To specify the illumination duration
1. In the Timekeeping Mode,
hold down the AA
AA
Abutton
for about two seconds
until the city code and
GMT differential start to
flash. This is the setting
screen.
2. Press the AA
AA
Abutton twice
to display the time setting
screen.
•This displays the DST setting.
3. Press the CC
CC
Cbutton twice
so the seconds are
flashing.
4. Press the BB
BB
Bbutton to
select the illumination
duration you want.
•Each press of the Bbutton
toggles the illumination
duration between 1.5 seconds
and 2.5 seconds. An indicator
on the display shows which
setting is currently selected.
•: 1.5 seconds
: 2.5 seconds
5. When the setting is the way you want, press the AA
AA
A
button to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
City Code
GMT Differential
Seconds
(Twice)
Illumination

4
Operation Guide 2931
You can select either a beeper or vibration as the alert that is
performed for the alarm, hourly time signal, or Timer Mode
progress alert and time up alarm.
Beeper: The watch emits audible beeps.
Vibration: The watch vibrates silently and a VIB indicator appears
on the display.
Vibration
Indicator
•While vibration alert is selected, the watch does not emit any
operation confirmation tones when you change modes, etc.
❚ To select beeper or vibration alert
1. In the Timekeeping Mode,
hold down the AA
AA
Abutton
for about two seconds
until the city code and
GMT differential start to
flash. This is the setting
screen.
2. Press the AA
AA
Abutton.
•This causes VIB (vibration
alert) or BEEP (beep alert) to
flash on the display.
3. Press the DD
DD
Dbutton to
toggle the alert setting
between VIB and BEEP.
•The VIB (vibration) indicator
appears when vibration alert it
selected. No indicator is
displayed while beep alert is
selected.
4. When the alert setting you want is displayed, press the
AA
AA
Abutton twice to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
City Code
GMT Differential
Vibration Indicator
Selecting Beeper or Vibration Alert
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.
Signal is received by
built-in antenna.
Signal data
Cesium
atomic clock
Transmitter Long-wave time
calibration signal
Internally
Decode
Watch
Time data
Watch decodes
received data and
converts it to time
data.
Time is adjusted
according to time
data.
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.
Calibration Signal
•The Japanese calibration signal (Call Sign: JJY) is maintained by
the National Institute of Information and Communications
Technology (NICT). It is 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.
•The U.S. calibration signal (Call Sign: WWVB) is transmitted by
the National Institute of Standards and technology from Fort
Collins, Colorado.
The time data of the Japanese calibration signal (Call Sign:
JJY) is maintained by the Japan Standard Time Group of the
National Institute of Information and Communications
Technology (NICT). Note that transmission of the standard
wave may be interrupted occasionally due to maintenance,
lightning, etc. For more information, visit the website of the
Japan Standard Time Group of the National Institute of
Information and Communications Technology (NICT) at the
following URL.
http://jjy.nict.go.jp
•Note that the above URL is subject to change.
Reception Ranges
This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB), depending on its
current Home City setting.
•For information about selecting a Home City, see “Setting the Home City Time and Date”. For information about city codes, see the
“GMT Differentials”.
Home City
TYO, OSA
LAX, DEN, CHI, NYC
Transmitter
Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)
Fort Collins, Colorado signal
1000km
Mt. Hagane
(60kHz)
Mt. Otakadoya
(40kHz)
500km
1000km
500km
Transmitter Location
•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.
Transmitter Location
3000km
1000km
Fort Collins
•Under optimum conditions, the calibration signal should be
receivable up to 3,000 kilometers from the transmitter. Note
that the wave is relatively weak at distances greater than
1,000km, so reception may be poor at long distances.
•Geographic contours, nearby buildings, the season, 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.
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.
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
Among or near buildings
Near mountains
Inside a vehicle (automobile,
train, plane, etc.)
In a location where there is
radio interference (construction
site, airport, etc.)
Next to a household appliance or
office equipment (TV, speaker,
fax, computer, cell phone, etc.)
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 a button
operation.)
•Once auto receive is successful on a particular day, the auto receive
operation for subsequent times are not performed for that day.
• 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 it
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.
How a Radio-controlled Watch Works

Operation Guide 2931
5
❚ To perform manual receive
In the Timekeeping Mode, hold
down the DD
DD
Dbutton for about
two seconds.
•The watch will beep and reception
will start. The receive indicator
flashes on the display while signal
reception is in progress.
❚ To interrupt reception
Press the DD
DD
Dbutton.
•All other buttons besides Dare disabled during signal reception.
When reception is successful
The watch terminates reception and adjusts the current time. Next
it beeps and then displays the date and time the adjustment was
performed.
•Following reception, the receive indicator will show a value from 1
to 3 as described under “Receive Indicator”. The receive indicator
is cleared each day at midnight.
•After the date and time of the adjustment appears on the display,
press the Dbutton to return to the Timekeeping Mode. If watch
will also return to the Timekeeping Mode automatically if you do
not perform any operation for about two or three minutes.
When reception fails
In the case of an error, the watch will not adjust its current time
setting, but display “ERR” instead.
•If the “ERR” indicator is displayed, you can clear it manually by
pressing the Dbutton. The error will also clear automatically if
you do not perform any operation for about two or three minutes.
Time Required for Reception
Signal reception normally takes anywhere from about two to five
minutes.
•Under certain conditions, signal reception can take as long as 12
minutes.
•For information about turning auto receive on and off, see
“To turn auto receive on and off”.
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.
Receive Indicator
❚ To view the last reception date and time
In the Timekeeping Mode, press the DD
DD
Dbutton.
•This displays the date and time when signal reception was last
successful, and the current time and date were last adjusted.
•If there have been no successful receptions, the last reception
time will show “- -:- -”.
•To return to the Timekeeping Mode, press the Dbutton again.
•The watch also will return to the Timekeeping Mode automatically
if you do not perform any operation for about two or three
minutes.
Reception Date
Reception Time
❚ To turn auto receive on and off
•Auto receive can be turned on only while OSA (Osaka), TYO
(Tokyo), LAX (Log Angeles), DEN (Denver), CHI (Chicago), or
NYC (New York) is selected as the Home City.
1. In the Timekeeping Mode,
press the DD
DD
Dbutton to
display the last reception
time and date.
•The watch also will return to
the Timekeeping Mode
automatically if you do not
perform any operation for
about two or three minutes.
2. Hold down the AA
AA
Abutton
for about two seconds
until the current On/OFF
setting starts to flash. This
is the setting screen.
Calibration Signal Reception
Precautions
•Auto receive can be performed while the watch is in the
Timekeeping Mode or World Time Mode only.
•Signal reception is not possible when any one of the following
conditions exists.
•Timer operation in progress
•Battery at Level 3 or Level 4
•Recover indicator (RECOV) displayed
•Operating any button while auto receive 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, the season, 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 and
the United States only. Note that you will need to make your own
adjustments when using this watch outside of Japan or the United
States, or in any area that is outside the range of one 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 an alert operation is starts 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.
When the Home City is TYO or OSA
•On
Selecting this setting turns on auto receive and auto
transmitter selection. The watch automatically selects either
the Otakadoya Mountain signal (40kHz) or the Hagane
Mountain signal (60kHz), whichever is strongest.
•OFF
Selecting this setting turns off auto receive and auto
transmitter selection.
When the Home City is NYC, CHI, DEN, or LAX
•On
Selecting this setting turns on auto receive. The watch always
receives the Fort Collins signal.
•OFF
Selecting this setting turns off auto receive and auto
transmitter selection.
3. Press the DD
DD
Dbutton to
toggle the setting between
Onand OFF.
4. When the setting is the
way you want, press the
AA
AA
Abutton.
•This will exit the setting
screen and return to the last
reception time and date
screen.
•Press the Dbutton to return
to the Timekeeping Mode.
•The display also will exit the
setting screen automatically if
you do not perform any
operation for about two or
three minutes.

Operation Guide 2931
6
Troubleshooting
The watch cannot receive the time calibration signal.
•Is the signal being transmitted?
Though the time data of the Japanese calibration signal (Call
Sign: JJY) is maintained by the Japan Standard Time Group of
the National Institute of Information and Communications
Technology (NICT), it may sometimes be interrupted for periodic
maintenance work, or because of lightning or other problems.
•Are you within the reception range of a transmitter?
See “Reception Ranges” for information about areas where the
watch can receive the signal.
•Is there something in the immediate area that may be interfering
with reception?
Even if you are within the reception range of a transmitter, objects
between you and the transmitter or electrical noise can interfere
with reception. Avoid such areas (see “Location”) during signal
reception.
•Do you have the correct Home City code selected?
Remember that auto receive is not performed unless OSA
(Osaka), TYO (Japan), LAX (Los Angeles), DEN (Denver), CHI
(Chicago), or NYC (New York) is selected as the Home City. For
details, see “To configure Home City settings”.
•Is auto receive turned off?
Use the procedure under “To turn auto receive on and off” to turn
on auto receive.
•Is the watch in any mode other than the Timekeeping Mode or
World Time Mode during the auto receive times (midnight, 1:00
a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)?
Auto receive is performed only when the watch is in the
Timekeeping Mode or World Time Mode. It is not performed if the
watch is in any other mode.
Time calibration signal reception is successful, but the hourly
time signal and current time are slightly off.
•After the watch receives the time calibration signal, it performs an
internal decoding process before updating its time setting.
Because of this, the time setting may be slightly off (within one
second).
Time calibration signal reception is successful, but the current
time is one hour fast.
•Do you have summer time (DST) turned on? Use the procedure
under “To configure Home City settings” to change the summer
time setting to OFF or AUTO.
Time calibration signal reception is successful, but the current
time setting is wrong.
•Is the correct city code selected for your Home City? For details
about setting the correct Home City, see “To configure Home City
settings”.
I can’t turn auto receive on and off
•Remember that auto receive cannot be turned on and off unless
OSA (Osaka), TYO (Japan), LAX (Los Angeles), DEN (Denver),
CHI (Chicago), or NYC (New York) is selected as the Home City.
For details about setting the correct Home City, see “To configure
Home City settings”.
Auto Receive
Home City
Summer Time
On
Tokyo
Auto (according to signal data)
The information that should appear in the tide graph and the Moon
graph depends on your location. Be sure to configure the required
settings (Home City and area) about your location before trying to
use these graphs.
•Once you specify your current location, you do not need to
change it unless you move to another relatively faraway
location, or if you allow the watch’s rechargeable battery to
go dead (which clears the current settings).
•The following are the watch’s factory default settings: Home
City: Tokyo (GMT Differential: +9.0); Area: SHIBAURA.
❚ To configure location settings
1. In the Timekeeping Mode,
hold down the AA
AA
Abutton
for about two seconds
until the city code and
GMT differential start to
flash. This is the setting
screen.
City Code
GMT Differential
(Back)
(Forward)
(Forward)
GMT Differentials
City
Code City Name
PPG
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–01
LON
PAR
BER
ATH
CAI
JRS
Pago Pago
Honolulu
Anchorage
Los Angeles
Denver
Chicago
New York
Caracas
Rio de Janeiro
London
Paris
Berlin
Athens
Cairo
Jerusalem
–11
–10
–9
–8
–7
–6
–5
–4
–3
–1
+00
+1
+1
+2
+2
+2
JED
THR
DXB
KHI
DEL
DAC
RGN
BKK
HKG
OSA
TYO
ADL
SYD
NOU
WLG
TBU
Jeddah
Teheran
Dubai
Karachi
Delhi
Dakar
Yangon
Bangkok
Hong Kong
Osaka
Tokyo
Adelaide
Sydney
Noumea
Wellington
Nuku’Alofa
+3
+3.5
+4
+5
+5.5
+6
+6.5
+7
+8
+9
+9
+9.5
+10
+11
+12
+13
GMT
Differ-
ential
GMT
Differ-
ential
City
Code City Name
•The contents of the above table are current as of December 2004.
•Time differentials in the above table are in accordance with
Universal Time Coordinated (UTC).
Using the Tide/Moon Graph
When is auto receive performed?
•Auto receive is performed in the middle of the night, when
reception conditions are best. Before going to bed at night, place
the watch near a window, with its 12 o’clock position facing in the
general direction of the transmitter.
How can I perform manual receive?
•Hold down the lower right Dbutton for about two seconds. The
watch will beep to indicate that manual receive has started. Place
it near a window, with its 12 o’clock position facing in the general
direction of the transmitter.
How can I view the last reception date and time?
•In the Timekeeping Mode, press the lower right Dbutton.
This will display the date and time that the time calibration signal
was last received successfully. To return to the Timekeeping
Mode, press the Dbutton again.
•If you cannot receive the calibration signal or if the current time
setting is incorrect after signal reception, check the current setup
of the watch.
•The following are the watch’s factory default settings, which are
configured automatically whenever you have the battery of the
watch replaced.
2. Press the CC
CC
Cbutton so the
setting you want to
change is flashing on the
display.
•Each press of the Cbutton
toggles between the City
Code (GMT differential) and
area screen.
City Code
(GMT Differential) Area
3. Select the city code (GMT differential) and area you want to set.
To select the city code (GMT differential)
Use the BB
BB
Band DD
DD
Dbuttons
to scroll through the
available city codes.
•Holding down either button
scrolls the setting at high
speed.
•Changing the city code
automatically changes the
time in accordance with the
applicable GMT differential.
To select the area
Press the DD
DD
Dbutton to
scroll thought available
areas.
•Holding down the Dbutton
scrolls the setting at high
speed.
•Refer to the “GMT Differentials” when setting the Home City
and the “Area List” when setting the area.
4. After the settings are the way you want, press the AA
AA
A
button three times to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.

Operation Guide 2931
7
Area List
City
Code Area City Code Area City Code Area City Code Area
TYO TYO TYO
OSA
OSA
SHIBAURA
OSHIMA
KOZU SHIMA
HACHIJO JIMA
CHICHI JIMA
YOKOHAMA
YOKOSUKA
ZUSHI
ENOSHIMA
MANAZURU
NIIGATA
TERADOMARI
KASHIWAZAKI
NAOETSU
OGI
TOYAMA
TAKI
KANAZAWA
HUKUI
WADA
ITO
SHIMODA
SHIMIZU
SAGARA
OMAEZAKI
MAISAKA
AKABANE
NAGOYA
HAMAJIMA
ABASHIRI
RUMOI
OTARU
HAKODATE
MURORAN
TOMAKOMAI
KUSHIRO
AOMORI
HACHINOHE
KUJI
KAMAISHI
KESENNUMA
SENDAI
NOSHIRO
OGA
AKITA
SAKATA
NEZUGASEKI
SOMA
YOTSUKURA
HITACHI
OARAI
KASHIMA
CHOSHIGYOKO
KAZUSAKATSUURA
KAMOGAWA
TATEYAMA
OSAKA
KOBE
AKASHI
TSUIYAMA
URAGAMI
TANABE
WAKAYAMA
TAJIRI
TONOURA
KURE
UBE
SHIMONOSEKI
YUYA
HAGI
HIWASA
TAKAMATSU
NIIHAMA
UWAJIMA
KANNOURA
MUROTOZAKI
MUROTSU
KOCHI
TOSASHIMIZU
TSUYAZAKI
HAKATA
KARATSU
SASEBO
MATSUSHIMA
KUMAMOTO
TOMIOKA
NISHIOITA
HOSOSHIMA
MIYAZAKI
ABURATSU
SHIBUSHI
KAGOSHIMA
MAKURAZAKI
AKUNE
NISHINOOMOTE
NAZE
NAHA
HIRARA
ISHIGAKI
MAIZURU
City
Code Area City Code Area City Code Area
PPG PAGO PAGO AMERICAN SAMOA
APIA SAMOA
HNL HONOLULU USA
KAHULUI USA
PAPEETE TAHITI
MAKEMO TAHITI
ANC JUNEAU USA
LAX SAN DIEGO USA
SANTA MONICA USA
SANTA BARBARA USA
VANCOUVER CANADA
DEN BAHIA MAGDALENA MEXICO
CABO SAN LUCAS MEXICO
CHI GALVESTON USA
COZUMEL MEXICO
ACAPULCO MEXICO
LA UNION EL SALVADOR
PUNTARENAS COSTA RICA
NYC
VIRGINIA BEACH USA
CHARLESTON USA
DAYTONA BEACH USA
MIAMI HARBOR USA
ELEUTHERA IS. BAHAMAS
GEORGE TOWN
CAYMAN ISLANDS
BUENAVENTURA PANAMA
PUERTO CHICAMA PERU
CCS
SANTO DOMINGO DOMINICAN R.
SAN JUAN PUERTO RICO
BRIDGETOWN BARBADOS
IQUIQUE CHILE
ANTOFAGASTA CHILE
VALPARAISO CHILE
RIO F.DE NORONHA BRAZIL
RECIFE BRAZIL
RIO FLORIANOPOLIS BRAZIL
BUENOS AIRES ARGENTINA
- 01 PRAIA CAPE VERDE
LON NEWQUAY ENGLAND
PLYMOUTH ENGLAND
PENICHE PORTUGAL
LISBON PORTUGAL
LAGOS PORTUGAL
FUNCHAL PORTUGAL
CASABLANCA MOROCCO
DAKAR SENEGAL
PAR BOUCAU FRANCE
BER CAGLIARI ITALY
LA CORUNA SPAIN
PORTUGALETE SPAIN
ATH WALVIS BAY NAMIBIA
CAI CAPE TOWN SOUTH AFRICA
JRS DURBAN SOUTH AFRICA
SUEZ EGYPT
JED JEDDAH SAUDI ARABIA
ANTSERANANA MADAGASCAR
THR
BANDAR-E LENGEH IRAN
DXB DUBAI ARAB
PTE. DES GALETS REUNION
PORT LOUIS MAURITIUS
KHI KARACHI PAKISTAN
MALE MALDIVES
DEL MUMBAI INDIA
DAC COLOMBO SRI LANKA
GALLE SRI LANKA
TRINCOMALEE SRI LANKA
CHITTAGONG BANGLADESH
RGN YANGON MYANMAR
BKK BANGKOK BAR THAILAND
BKK PHUKET THAILAND
GUNUNGSITOLI INDONESIA
SIBERUT INDONESIA
TANJUNG PRIOK INDONESIA
SURABAYA INDONESIA
HKG HONG KONG CHINA
CEBU PHILIPPINES
SURIGAO PHILIPPINES
TAWAU PHILIPPINES
EXMOUTH AUSTRALIA
CARNARVON AUSTRALIA
GERALDTON AUSTRALIA
ALBANY AUSTRALIA
ADL ADELAIDE AUSTRALIA
DARWIN AUSTRALIA
SYD SYDNEY AUSTRALIA
MELBOURNE AUSTRALIA
BRISBANE AUSTRALIA
GOLD COAST AUSTRALIA
GUAM USA
SAIPAN USA
TRUK MICRONESIA
KAVIENG
PAPUA NEW GUINEA
NOU NOUMEA NEW CALEDONIA
PORT VILA PACIFIC OCEAN
WLG WELLINGTON NEW ZEALAND
GISBORNE NEW ZEALAND
AUCKLAND NEW ZEALAND
RAGLAN NEW ZEALAND
SUVA FIJI ISLANDS
TBU NUKUALOFA TONGA
NEIAFU TONGA
Using the Moon Graph (Moon Phase) Using the Tide Graph
❚ To view the current tide graph
The tide graph appears on the Timekeeping Mode and Tide/Moon Graph Mode screens.
•In the Timekeeping Mode, press the Abutton to cycle through the available screens and display the tide graph.
•Because the watch needs to read certain data, it takes about 40 seconds before the tide graph appears.
•The tide graph shows the tide changes over time as shown below.
Tide Graph
PM indicator
(A for AM)
Month, Day
Important!
The tide information displayed by this watch is not intended for navigation
purposes. For navigation purposes, be sure to use official tide charts for
the area you are navigating. The tide graph of this watch provides a
reasonable representation of tidal movements for reference purposes only.
The dark part of the Moon graph is the part of the Moon that is
shaded, while the light part of the Moon graph shows the
approximate shape of the current Moon phase.
Shaded partVisible part of
the Moon
(light part)
❚ To view the current Moon graph
The Moon graph appears on the Timekeeping Mode and Tide/
Moon Graph Mode screens, except when the setting screen (with
flashing settings) is displayed.
Example: Timekeeping Mode
Moon Graph
(Moon Phase)
❚ Moon Phase and Moon Age
Moon
Phase
Moon
Age
New
Moon
First
Quarter
Full
Moon
Last
Quarter
Graph
0.0
to
1.8
27.8
to
29.4
25.9
to
27.7
24.1
to
25.8
22.2
to
24.0
20.4
to
22.1
18.5
to
20.3
16.7
to
18.4
14.8
to
16.6
13.0
to
14.7
11.1
to
12.9
1.9
to
3.6
3.7
to
5.5
9.3
to
11.0
7.4
to
9.2
5.6
to
7.3
•The Moon phase graph shows the approximate shape of the Moon at noon, when viewed to the south in the northern hemisphere.
•The Moon phase graph is intended to indicate only when the left side and right side of the Moon is illuminated or shaded. The shape
shown by the graph may differ from the actual shape of the Moon. Note that the shapes indicated by the Moon graph will be reversed
when the Moon is viewed to the north from the southern hemisphere or in the vicinity of the equator.
•The Moon phase graph will not indicate the proper phase unless the Timekeeping Mode time and date, the Home City, and the area settings
are all configured correctly.
❚ To interpret the tide graph
The tide graph shows the relative rise and fall of the water level
from the average level.
–1 meter from average water level (when “×1” is displayed)
1 meter from average water level (when “×1” is displayed)
Time
Average water
level and its
differential
•When “×2” is displayed, multiply graph values by two.
•When “×3” is displayed, multiply graph values by three.
•Periods when the differential from the average water level
exceeds three meters are not shown on the graph.

Operation Guide 2931
8
❚ To jump to a specific date
1. Hold down the AA
AA
Abutton
for about two seconds
until the year digits of the
date start to flash.
2. Press the CC
CC
Cbutton to
select the setting you
want to change.
•Each press of Cmoves the
flashing between the year,
month, and day as shown
below.
DayMonth Yea r
Month
Selected Date (Forward)
PM indicator
(A for AM)
Yea r
Viewing the Tide Graph/Moon Graph for a Particular Date
In the Timekeeping Mode, press the Cbutton to enter the Tide/Moon Graph Mode.
3. Use the DD
DD
D(+) and BB
BB
B(–)
buttons to change each
setting.
•Holding down either button
scrolls the setting at high
speed.
Use the Cbutton to select each of the settings and the D
and Bbuttons to change them to the year, month, and day
you want.
4. When the date is the way
you want, press the AA
AA
A
button.
•The tide graph and moon
graph for the date you
specified will appear in about
40 seconds.
•The display also will exit the
setting screen automatically if
you do not perform any
operation for about two or
three minutes.
5. Press the AA
AA
Abutton to
toggle between a.m. and
p.m.
(Decrease)
(Increase) PM indicator
(A for AM)
World time lets you display the current time in any one of 32 cities
(30 time zones) around the world.
•When you enter the World Time Mode, the screen for the city that
was displayed when you last exited the mode appears first.
•The seconds count in the World Time Mode is linked with the
Timekeeping Mode seconds count.
•The same 12-hour/24-hour format you select for the Timekeeping
Mode time is also applied in the World Time Mode.
Important!
•If the World Time Mode time is incorrect, correct the setting of the
current time in the Timekeeping Mode.
•For information about selecting a Time Zone and setting
the time, see “Setting the Home City Time and Date”.
❚ To search for a city code
In the World Time Mode, press the DD
DD
Dbutton to scroll
through the city codes.
•Holding down the Dbutton scrolls at high speed.
City Code
World Time
Using World Time Use the CC
CC
Cbutton to enter the World Time Mode as shown
under “Modes and Display Screens”. Using Summer Time (DST)
Summer time, or Daylight Saving Time (DST) as is 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 or off
1. In the World Time Mode, use the DD
DD
Dbutton to display the
screen for the city code whose summer time setting you
want to change.
2. Hold down the AA
AA
Abutton
for two seconds to toggle
the summer time setting
on (DST indicator
displayed) and off.
•Turning on summer time
advances the current time by
one hour.
•You can turn summer time on
or off independently for each
World Time Mode city.
•If you turn on summer time for
the city that you are using for
your Home Time city, summer
time is also turned on in the
Timekeeping Mode.
World Time City Code List
City
Code City Name
PPG
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–02
–01
LON
PAR
BER
ATH
CAI
JRS
Pago Pago
Honolulu
Anchorage
Los Angeles
Denver
Chicago
New York
Caracas
Rio de Janeiro
London
Paris
Berlin
Athens
Cairo
Jerusalem
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
+0
+1
+1
+2
+2
+2
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
OSA
TYO
ADL
SYD
NOU
WLG
TBU
Jeddah
Teheran
Dubai
Kabul
Karachi
Delhi
Dakar
Yangon
Bangkok
Hong Kong
Osaka
Tokyo
Adelaide
Sydney
Noumea
Wellington
Nuku’Alofa
+3
+3.5
+4
+4.5
+5
+5.5
+6
+6.5
+7
+8
+9
+9
+9.5
+10
+11
+12
+13
City
Code City Name
GMT
Differ-
ential
GMT
Differ-
ential
•The contents of the above table are current as of December 2004.
•Time differentials in the above table are in accordance with
Universal Time Coordinated (UTC).
DST indicator
❚ To scroll through dates
1. Use the DD
DD
Dbutton to scroll
through the date screens
until the one you want is
displayed.
•The tide graph and moon
graph for the date you
selected will appear in about
40 seconds.
•Holding down the Dbutton
scrolls at high speed.
2. Press the AA
AA
Abutton to
toggle between a.m. and
p.m.

Operation Guide 2931
9
To select the timer type
Press the DD
DD
Dbutton to
toggle between the auto
repeat timer and repeat
timer.
4. When the settings are the way you want, press the AA
AA
A
button to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
❚ To use the countdown timer
Press the DD
DD
Dbutton to start and stop the countdown timer.
•The time counts down in one-second steps.
(Reset)
(Start/Stop)
Minutes Seconds
•Pressing the Abutton while the countdown is stopped
displays the timer start time.
•Pressing the Dbutton again while the countdown is
stopped restarts the countdown.
•Pressing the Abutton while a countdown is in progress
displays the reset time and stops the countdown. After that
you can restart the countdown from the reset time by
pressing the Dbutton.
•Pressing the Abutton while the reset time is on the display
restores the timer start time.
•Button operation is disabled during the alarm (beep or
vibration) operation.
•To stop an ongoing repeat timer elapsed time operation
stops it. After that, press Ato restore the timer start time.
Repeat Timer
Auto Repeat Timer
The stopwatch measures elapsed time in units of 1/100 second
up to 99 hours, 59 minutes, 59.99 seconds (100 hours). When
the maximum limit is reached, the elapsed time returns to zero
automatically and timing continues from there.
To use the stopwatch
In the Stopwatch Mode, press the DD
DD
Dbutton to start and
stop the stopwatch.
(Split/Reset)
(Start/Stop)
Time
Minutes
Seconds
1/100 second
•Pressing Awhile an elapsed time operation is being
performed freezes the current time on the display and
continues timing of the next split internally. This condition
is indicated by the “SPL” (split) indicator on the display.
•Changing to another mode while a split time is displayed
cancels the split time operation.
•Pressing the Abutton while timing is stopped resets the
stopwatch to all zeros.
❚ To perform elapsed time measurement
Stop ResetStart
Cumulative Time Measurement
Pressing the Dbutton to restart the stopwatch without
resetting it to all zeros resumes elapsed time measurement
from where it was last stopped.
❚ To perform split time measurement
Split Release Split ResetStopStart
Split Time Screen
Split Time Indicator
Release Split
❚ To time 1st and 2nd place finishers
Start 1st Finisher
(Displays time
of 1st finisher.)
2nd Finisher Displays time
of 2nd finisher. Reset
Using the Stopwatch Use the CC
CC
Cbutton to enter the Stopwatch Mode as shown under
“Modes and Display Screens”.
•Progress Alert
The watch beeps (or vibrates) every second of the last 10 seconds before reaching the reset time. The watch beeps (or vibrates) at the
top of each minute following the reset time. The watch beeps (or vibrates) 30 seconds before the end of the countdown is reached.
•Time Up Alarm
The watch beeps (or vibrates) every second of the last 10 seconds of the countdown.
•Whether the watch beeps or vibrates depends on the current alert setting. See “Selecting Beeper or Vibration Alert” for more
information.
❚ To configure timer settings
1. In the Timer Mode, hold
down the AA
AA
A button for
about two seconds until
the minute digits of the
start time start to flash.
This is the setting screen.
•The timer setting screen can
be displayed only when the
timer start time is displayed.
Press the Abutton to display
the timer start time before
performing the above step.
2. Press the CC
CC
Cbutton to
select the setting you
want to change.
•Each press of Cmoves the
flashing between the settings
as shown below.
Timer Start Time
(Minutes)
Timer Type
Reset Time
(Minutes)
3. Configure the currently flashing setting.
To set the timer start time or reset time
Use the DD
DD
D(+) and BB
BB
B(–)
buttons to change the
currently select (flashing)
setting.
•Holding down either button
scrolls the setting at high
speed.
•The timer start time can be
set in the range of 1 minute
(1'00") to 60 minutes (60'00").
•The reset time can be set in
the range of 1 minute (1'00")
to 5 minutes (5'00"). A reset
time that is greater than the
timer start time is not allowed.
Start Time (Minutes)
Reset Time (Minutes)
(Decrease)
(Increase)
Using the Timer Use the CC
CC
Cbutton to enter the Timer Mode as shown under
“Modes and Display Screens”.
The timer start time can be set in one-second units, up to 60 minutes. The reset time can be set in the range of one minute to five minutes.
When a reset time is specified, the timer operation can be restarted from the reset time quickly and easily.
Timer Types
there are two timer types as described below. The timer can be configured so it becomes a valuable tool for yacht and surfing
competitions.
Auto Repeat Timer
With the auto repeat timer, the timer automatically resets the start
time and continues timing when the end of the current countdown
is reached.
•The countdown repeats up to 8 times and then stops automatically.
Example: Timer start time: 10 minutes, Reset time: 5 minutes
Start Reset Time Time Up
10'00" 5'00" 0'00" Repeat
Repeat Timer
The repeat timer automatically switches to elapsed time
measurement when the end of the countdown is reached.
Example: Timer start time: 10 minutes, Reset time: 5 minutes
Start Reset Time Time Up Stop
10'00" 5'00" 0'00" Elapsed Time Measurement
Timer Resets
to Start Time

Operation Guide 2931
10
❚ Daily Alarm (AL1, AL2, AL3)
The watch performs an alert operation (beep or vibration) for
about 10 seconds when an alarm time is reached.
❚ Snooze Alarm (SNZ)
With the snooze alarm, the watch performs an alert operation
(beep or vibration) for 10 seconds when the alarm time is reached,
and up to seven times at five-minute intervals thereafter. Pressing
any button stops the alert operation, but the alert operation will be
performed again after five minutes.
❚ Hourly Time Signal
The hourly time signal causes the watch to beep or vibrate every
hour on the hour.
Whether the watch beeps or vibrates depends on the current
alert setting. See “Selecting Beeper or Vibration Alert” for
more information.
❚ To set an alarm time
1. In the Alarm Mode, use the
DD
DD
Dbutton to scroll
through the alarm screens
in the sequence shown
below until the one you
want is displayed.
•Each press of the Dbutton
cycles through alarm screens
in the sequence shown below.
Alarm 3
(AL3)
Alarm 1
(AL1) Alarm 2 (AL2)
Hourly Time
Signal (SIG) Snooze Alarm (SNZ)
2. When the alarm you want
to set is displayed, hold
down the AA
AA
Abutton for
about two seconds until
the hour digits start to
flash on the display.
•This also causes the alarm
indicator to appear, and turns
on the alarm automatically.
The snooze alarm screen also
has a snooze indicator (SNZ).
(Forward)
Alarm Number
Hour Alarm Indicator
Using the Alarms and Hourly Time Signal
Use the
CC
CC
C button to enter the Alarm Mode as
shown under “Modes and Display Screens”.
3. Press the CC
CC
C button to
select the setting you
want to change.
•Each press of Cmoves the
flashing between the hour and
minute as shown below.
4. Use the DD
DD
D (+) and BB
BB
B (–)
buttons to change each
setting.
•Holding down either button
changes the setting at high
speed.
Repeat steps 3 and 4 to set the time you want.
•When setting the hour, make sure you specify AM (no indicator) or
PM (P) correctly when using 12-hour timekeeping, or that you
specify the correct 24-hour time.
•The same 12-hour/24-hour format you select for the Timekeeping
Mode time is also applied in the Alarm Mode.
5. When the alarm time is the way you want, press the AA
AA
A
button to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
❚ To turn an alarm on or off
1. In the Alarm Mode, use the DD
DD
D button to display the
screen for the alarm you want to turn on or off.
2. Press the AA
AA
A button to toggle the displayed alarm on or
off.
•Turning on an alarm or the Hourly Time Signal causes its
indicator to appear on the display. The snooze alarm screen
also has a snooze indicator (SNZ).
Alarm 1 Screen
Alarm Indicator
Snooze Alarm Screen
Alarm Indicator
Snooze Indicator
(Decrease)
(Increase)
Hour Minutes
❚ To stop an alert operation
Press any button.
•In the case of the snooze alarm the alert operation will be
performed again in about five minutes. The snooze indicator
flashes while the snooze alarm is active (indicating that the alert
operation will be performed again).
•The snooze alarm will be canceled automatically when any one of
the following occurs while the SNZ indicator is flashing on the
display.
•Turning off the snooze alarm
•Displaying the snooze alarm setting screen
•Displaying the Timekeeping Mode setting screen
❚ To test the alert operation
In the Alarm Mode, hold down the Dbutton to perform the alert
operation.
❚ To turning the hourly time signal on and off
1. In the Alarm Mode, use the DD
DD
D button to display the screen
for the hourly time signal (SIG).
2. Press the AA
AA
Abutton.
•Press the Abutton to toggle the hourly time signal on or off.
•Turning on an alarm or the Hourly Time Signal causes its
indicator to appear on the display.
Hourly Time Signal Screen
Hourly Time Si
g
nal Indicator

Operation Guide 2931
11
12. While the Hour, Minutes,
Year, Month, or Day
setting is flashing, use BB
BB
B
(–) and DD
DD
D(+) to change it.
•Holding down either button
scrolls the setting at high
speed.
Repeat the above steps as many times as necessary to
select each setting and change it as required.
•When setting the hour, make sure you specify AM (no indicator) or
PM (P) correctly when using 12-hour timekeeping, or that you
specify the correct 24-hour time.
•You can set the year within the range of 2000 to 2099.
The day of the week is set automatically in accordance with the
date you set.
•The watch makes adjustments for leap years and month lengths
automatically.
13. When all of the settings are the way you want, press
the AA
AA
Abutton to exit the setting screen.
•The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.
10. While the 12/24-hour
setting is selected, press
the DD
DD
Dbutton to toggle
the timekeeping format
between 12-hour (“12H”
indicator) and 24-hour
(“24H” indicator).
11. While the seconds are
selected, press the DD
DD
D
button to reset them to 00
in accordance with the
time signal on the radio,
TV, etc.
•Pressing Dwhile the
seconds are in the range of
30 to 59 resets them to 00
and adds 1 to the minutes. In
the range of 00 to 29, the
minutes are unchanged.
•While the seconds are
flashing, you can also press
the Bbutton to change the
illumination duration. See “To
specify the illumination
duration” for more information.
•From here you can use the
Cbutton to select the
settings shown below. Each
press of Ccauses the
applicable setting to flash.
Power Saving
Beep/Vibration Temperature Calibration
4. While the Beep/Vibration
setting is flashing, press
the DD
DD
Dbutton to toggle
between “BEEP” (beeper
alert) and “VIB” (vibration
alert).
•The VIB (vibration) indicator
appears when vibration alert it
selected. No indicator is
displayed while beep alert is
selected.
5. While Temperature
Calibration is selected,
use the DD
DD
D(+) and BB
BB
B(–)
buttons to change the
setting in 0.1oC steps.
•Holding down either button
scrolls the setting at high
speed.
•You range of the temperature
calibration setting is –9.9oC to
+9.9oC.
The temperature sensor is calibrated at the factory, and
further calibration normally is not required. Perform the above
operation only when you find that a temperature reading taken
with another accurate instrument is very different from the
reading produced by your watch. Take care that you perform
the calibration operation correctly. Using the wrong value can
make it impossible to correctly measure temperatures.
6. While the Power Saving
setting is selected, press
the DD
DD
Dbutton to toggle it
ON and OFF.
•Turning on Power Saving
causes the Power Saving
indicator to appear on the
setting screen.
Beep/Vibration
Vibration Indicator
Temperature
(Decrease)
(Increase)
Power Saving Indicator
You can use the following procedure to set the current time and
date of the Home City that you have selected in the Timekeeping
Mode.
•Always use the Timekeeping Mode to set and adjust the current
time and date settings.
•You can also turn Power Saving on and off while setting the time
and date.
❚ To configure Home City settings
1. In the Timekeeping Mode,
hold down the AA
AA
Abutton
for about two seconds
until the city code and
GMT differential start to
flash. This is the setting
screen.
2. Use the DD
DD
D(+) and BB
BB
B(–)
buttons to scroll through
the city codes until the
one you want to use as
your Home City is
displayed.
•Dscrolls eastward, while B
scrolls westward. See “GMT
Differentials” for a list of city
codes.
•Holding down either button changes the setting at high speed.
•You can also press the Cbutton so “AREA” is flashing, and
select a tide/Moon graph area. See “To configure location
settings”.
3. Press the AA
AA
Abutton.
•This causes VIB (vibration
alert) or BEEP (beep alert) to
flash on the display.
TYO = Tokyo
(Back)
(Forward)
City Code
GMT Differential
Hour Minutes
Year
Month, Day
(Decrease)
(Increase)
Resets to 00.
12/24-hour Timekeeping
7. Press the AA
AA
Abutton.
•This displays the DST setting.
8. From here you can use the
CC
CC
Cbutton to select the
settings shown below.
Each press of CC
CC
Ccauses
the applicable setting to
flash.
•Use the Cbutton to cycle
through the time and date
settings shown below. Each
press of Ccauses the
applicable setting to flash.
Summer Time 12/24-hour
Hour
Minutes
Month Year
Day
Seconds
9. While the Summer Time
setting is selected, use the
DD
DD
Dbutton to cycle through
the settings described
below.
•AUTO
This setting enables the auto summer time setting, which
turns summer time on or off in accordance with the received
time calibration signal.
•This setting uses Japan summer time data when OSA or
TYO is selected as the Home City, and U.S. summer time
data when NYC, CHI, DEN, or LAX is selected as the
Home City.
•OFF
This setting turns off summer time, and displays the current
time normally.
•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 the above setting toggles between “OFF” and “ON”
when any city code other than HKG, TYO, OSA, NYC, CHI, DEN,
LAX, ANC, or HNL is selected as the Home City.
Setting the Home City Time and Date