Technical information | Casio 4350 Watch User Manual

MO0602-EA
Operation Guide 4350
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully and keep it on hand for later reference
when necessary.
Bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch
where it is not exposed to light causes the battery to run
down. Make sure the watch is exposed to light as much as
possible.
• When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.
• You should try to keep the watch outside of your sleeve
as much as possible. Even if the face of the watch is
only partially blocked from light, charging will be reduced
significantly.
l
l l l l l l l l l
l
Keep the watch exposed to bright light
Solar cell
• The watch continues to operate, even when it is not exposed to light. Leaving the
watch in the dark can cause the battery to run down, which will cause some watch
functions to be disabled. If the battery goes dead, you will have to re-configure watch
settings after recharging. To ensure normal watch operation, be sure to keep it
exposed to light as much as possible.
Battery charges in the light.
Solar cell
(Converts light to
electrical power.)
Battery discharges in the dark.
Bright light
LEVEL 2
If the analog hands aren’t moving, it means that the power saving mode has stopped
them to save battery power.
• See “Power Saving” for more information.
• The hands also stop whenever the battery level reaches Level 3.
• This watch does not have a time zone that corresponds to the Greenwich
Mean Time differential of –3.5 hours. Because of this, the radio-controlled
atomic timekeeping function will not display the correct time for
Newfoundland, Canada.
• Your watch switches automatically between Standard Time and Daylight
Saving Time (summer time).
Note, however, that switching cannot be performed correctly if the watch is
not able to receive the time calibration signal.
If you notice that the current time is not displayed properly, use the
procedure under “To perform manual receive” or “To set the time and date
manually” to correct it.
About This Manual
• Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
Minute hand
Stopwatch second hand
Hour hand
All functions disabled,
except for analog timekeeping
and stopwatch .
Electrical
energy
LEVEL 1
If the analog hands aren’t moving...
All
functions
enabled.
LEVEL 1
Dis- LEVEL 2
charge LEVEL 3
Charge LEVEL 3
Rechargeable battery
All
functions
disabled.
• The actual level at which some functions are disabled depends on the watch model.
• Be sure to read “Power Supply” for important information you need to know
when exposing the watch to bright light.
Date
24-Hour hand
Second hand
Stopwatch Mode
General Guide
Press C.
Manual Receive
Receive Status Check
▲
▲
▲
Press any button.
▲
Press B.
Press C.
Alarm Mode
Timekeeping Mode
Press B.
• Each press of D advances
Dual Time 30 minutes.
▲
▲
Hold down A
for about five seconds.
Press A.
▲
Press A.
▲
Transmitter Change
Time/Date Adjustment
Press A.
▲
▲
Timekeeping Mode
Hold down A
for about two seconds.
▲
Press A.
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly.
The time calibration signal includes both Standard Time and Daylight Saving Time
(summer time) data.
• This watch is designed to pick up the time calibration signal transmitted in the United
States (Fort Collins, Colorado) and the time calibration signals transmitted in Japan.
• The U.S. time calibration signal can be picked up by the watch while in North
America*.
* The term “North America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration
signal. You can also perform a manual procedure to set the time and date, when
necessary.
• The first thing you should do after purchasing this watch is to specify your Home
Time Zone, which is the time zone where you will normally use the watch. For more
information, see “To specify your Home Time Zone” below.
• When using the watch outside the range of the time signal transmitter, you have to
adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time settings.
To specify your Home Time Zone
1. In the Timekeeping Mode, hold down A for about five
seconds until the stopwatch second hand moves to the
currently selected GMT differential value and stops.
This is the setting mode.
• The GMT differential value indicates the time
difference in hours between Greenwich Mean Time
and the currently selected time zone.
2. Press D to select the time zone you want to use as
your Home Time Zone.
ET (GMT –5): Miami, Toronto, New York, Montreal,
Detroit, Boston, Panama City, Havana, Lima,
Bogota
CT (GMT –6): Mexico City, Winnipeg, Chicago,
Houston, Dallas/Fort Worth, New Orleans
MT (GMT –7): Edmonton, Denver, El Paso
PT (GMT –8): Vancouver, Los Angeles, San Francisco, Las Vegas, Seattle/
Tacoma, Dawson City
–09 (GMT –9): Anchorage, Nome
–10 (GMT –10): Honolulu, Papeete
TYO (GMT +9): Tokyo, Seoul, Pyongyang
• Note that this watch does not have a city code that corresponds to Newfoundland.
3. Press A to return to the Timekeeping Mode.
• The watch will also return to the Timekeeping Mode if you do not perform any
operation for about two or three minutes.
• Normally, your watch should show the correct time as soon as you specify your
Home Time Zone. If it does not, it should adjust automatically after the next auto
receive operation (in the middle of the night). You can also perform manual receive
or you can set the time manually.
• Even if the time calibration signal is received correctly, there are some times when
the analog hands may not indicate the correct time. If this happens, use the
procedures under “Adjusting the Home Positions” to check the home positions of the
hands, and make adjustments as required.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to six
times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.
• Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.
Important!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
12 o’clock
or
• The watch should not be facing the wrong way.
1
Operation Guide 4350
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport, or
other sources
of electrical
noise
Near
household
appliances,
office
equipment,
or a mobile
phone
Near hightension
power lines
Among or
behind
mountains
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from four to seven minutes, but in some
cases it can take as long as 14 minutes. Take care that you do not perform any
button operations or move the watch during this time.
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Fort Collins, Colorado
(the United States)
60.0 kHz
Fukushima (Japan)
40.0 kHz
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If reception is not successful, the stopwatch second hand will move to N (NO).
5 second later, the stopwatch second hand will resume normal operation, without
any adjustment of the hand setting.
• If the stopwatch second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing any button.
Fukuoka/Saga (Japan)
60.0 kHz
Viewing the Latest Signal Reception Results
Home City Code
Transmitter
ET (GMT –5),CT (GMT –6)
MT (GMT –7),PT (GMT –8)
–09 (GMT –9),–10 (GMT –10)
TYO (GMT +9)
To perform manual receive
1. Place the watch on a stable surface so its 12 o’clock
side is facing towards a window.
2. In the Timekeeping Mode, hold down A for about two
seconds until the watch beeps.
3. The stopwatch second hand will move to R (READY) to
indicate that the watch is setting up for time calibration
reception.
• The second hand will move to W (WORK) and stay there
R(READY)
while actual reception is in progress.
W(WORK)
• The hour and minute hands continue to keep time
normally.
Y(YES)
• Time calibration signal reception takes from four to
seven minutes, but in some cases it can take up to 14
minutes. Take care that you do not perform any button
operations or move the watch during this time.
• If reception is successful, the second hand will move to
Y (YES). 10 seconds later, the hands will move to the
correct time.
N(NO)
Frequency
You can use the Receive Result Mode to check if signal reception was performed
correctly.
Reception Ranges
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
500
kilometers
Fukuoka/Saga
1,000
kilometers
500
kilometers
Fukushima
1,000
kilometers
To check the latest signal reception results
1. In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal
receive operation since midnight, the stopwatch second
hand will move to Y (YES). If the watch has been unable
to receive any signal successfully, the second hand will
move to N (NO).
• The watch will return to the Timekeeping Mode after five
seconds or when you press A.
• The current receive result is cleared when the first auto
receive operation is performed on the following day. This
means Y (YES) indicates successful signal reception
since the start of the current day.
• Y (YES) continues to be indicated even if an attempt at
manual receive fails after auto receive is successful.
• If you adjust the time or date setting manually, the
second hand will move to N (NO).
• At distances further than about 600 miles (1,000 kilometers) from the Fort Collins
(the United States) transmitter, signal reception may not be possible during certain
times of year or times of day. Radio interferance may also cause problems with
reception.
• At distances further than about 500 kilometers (310 miles) from the Fukushima and
Fukuoka/Saga (Japan) transmitter, signal reception may not be possible during
certain times of year or times of day. Radio interferance may also cause problems
with reception.
• Even when the watch is within the reception range of the transmitter, signal
reception will be impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
• Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day.
When any auto receive is successful, the remaining auto receive operations are not
performed. The reception schedule (calibration times) depends on your currently
selected Home Time Zone, and whether standard time or Daylight Saving Time is
selected for your Home Time Zone.
Auto Receive Start Times
Your Home Time Zone
1
2
3
4
5
6
TYO (GMT +9) Standard Time
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
Problem
Probable Cause
What you should do
The
• You changed the time setting
• Perform manual signal
stopwatch
manually.
receive or wait until the next
second hand • The watch was not in the
auto signal receive operation
is pointing at
Timekeeping Mode, or you performed is performed.
N (NO).
• Check to make sure the
some button operation during the
watch is in a location where it
auto receive operation.
can receive the signal.
• Signal reception results are reset at
midnight each day.
Time setting is • The Home Time Zone setting is not • Select the correct Home
correct for the area where you are
incorrect
Time Zone.
following signal using the watch.
reception.
Dual Time
Dual Time minute hand
ET (GMT –5), Standard Time and
Midnight 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
CT (GMT –6), Daylight Saving Time
MT (GMT –7),
PT (GMT –8),
–09 (GMT –9),
–10 (GMT –10)
Note
• Auto receive is supported in all modes except while a stopwatch elapsed time
operation is in progress.
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can receive the signal easily.
• The watch receives the calibration signal for two to 14 minutes everyday when the
time in the Timekeeping Mode reaches each of the calibration times. Do not perform
any button operation within ten minutes before or after any one of the calibration
times. Doing so can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode.
The Dual Time lets you keep track of time in a different
time (24-hour format).
• All of the operations in this section are performed in the
Timekeeping Mode.
• The Dual Time is synchronized with the current time.
To set the Dual Time
1. In the Timekeeping Mode, each press of D advances
Dual Time 30 minutes. Press D to set the Dual Time
that you want.
Dual Time hour hand
Stopwatch
Stopwatch second hand
The stopwatch lets you measure elapsed time.
• The display range of the stopwatch is 23 hours, 59
minutes, 59.95 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• You cannot switch to another mode while a stopwatch
elapsed time operation is in progress.
• All of the operations in this section are performed in the
Stopwatch Mode.
To measure elapsed time
• Stopwatch hour hand
1. Press B to start the stopwatch.
(24-hour format)
• Stopwatch minute hand 2. Press B to stop the stopwatch.
• You can resume the measurement operation by
Stopwatch 1/20 second hand
pressing B again.
* This hand rotates and indicates
• The 1/20 second hand rotates during the first 60
the second count during the first
seconds only, and then stops. When elapsed timing is
60 seconds.
stopped (by pressing B), this hand jumps to the 1/20
second indication (which is kept internally).
3. Check the elapsed time.
• Press A to reset the stopwatch.
2
Operation Guide 4350
Alarm
When the alarm is turned on, the alarm sounds when the
alarm time is reached.
• All of the operations in this section are performed in the
Alarm Mode.
• When you enter the Alarm Mode, the stopwatch second
hand will move to either ON (alarm on) or OFF (alarm
off), and the alarm time dial hands will move to the
current alarm time setting.
• Alarm time hour hand
• Alarm time minute hand
To set an alarm time
1. In the Alarm Mode, hold down A for five seconds to
display the setting mode.
• The stopwatch second hand will move to ON (alarm
on).
2. Use D and B to change the alarm time.
• Press D to move the hands clockwise in one-minute
steps.
• Press B to move the hands counterclockwise in oneminute steps.
3. After setting the alarm time, press A to exit the setting mode.
• Setting the alarm time causes the alarm to turn on automatically.
4. Press B to return to the Timekeeping Mode.
Alarm Operation
To set the time and date manually
1. In the Timekeeping Mode, hold down A for about five
seconds.
• This will cause the stopwatch second hand to move to ET,
CT, MT, PT, –09, –10, TYO, depending on the currently
selected GMT differential setting. This is the setting mode.
• The GMT differential value indicates the time difference in
hours between Greenwich Mean Time and the currently
selected time zone.
2. Use D and B to change it as shown below.
To do this:
While the stopwatch second hand is here:
Change the time zone ET (GMT –5), CT (GMT –6),
MT (GMT –7), PT (GMT –8),
–09 (GMT –9), –10 (GMT –10),
TYO (GMT +9)
Change the day
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in.
• Alarm operations are performed in accordance with the Timekeeping Mode time.
• Pressing any button stops the alarm tone operation.
To do this:
Move the hour and minute hands clockwise
Move the hour and minute hands
counterclockwise
Setting the current time
If the time and date settings are wrong even after the time calibration signal is
received normally, use the following procedure to adjust their home positions.
To adjust the home positions
1. In the Timekeeping Mode, hold down A and C for five
Stopwatch second hand
seconds.
This enters the Home Position Adjustment Mode, which
you can use to check and adjust the home position of
the timekeeping second hand the stopwatch second
hand.
• The timekeeping second hand is in the proper home
position if it moves to 12 o’clock. If it doesn’ t, press D
to move it to 12 o’clock.
• The stopwatch second hand is also in the proper
home position if it moves to 12 o’clock. If it doesn’t,
press B to move it to 12 o’clock.
Timekeeping second hand
2.
After
confirming that the timekeeping second hand and
Minute hand Hour hand
stopwatch second hand are both at the proper home
positions, press C.
This will switch to hour hand and minute hand home
position adjustment.
• The hour hand and minute hand are at their proper
home positions if they both move to 12 o’clock, and if
the 24-hour hand is pointing at hour 24. If the hands
are not positioned correctly, use D (+) and B (–) to
move all three hands to their proper home positions.
24-hour
3.
After
confirming that the hour hand and minute hand
hand
are both at their proper home positions, press C.
Stopwatch minute hand
This will switch to stopwatch minute hand and
stopwatch hour hand home position adjustment.
• The stopwatch minute and hour hands are both at
their proper home positions if they move to 24 o’clock.
If they don’t, use D (+) and B (–) to move them to
24 o’clock.
4. After confirming that the stopwatch minute and hour
hands are both at their proper home positions, press
C. This will change to date home position adjustment.
Stopwatch
• The date is at the proper home position if 1 is
hour hand
displayed. If it isn't, use D (+) and B (–) to adjust it
to 1.
5. Press A to return to the Timekeeping Mode.
• After you complete the home position adjustment
procedure, place the watch in a location that allows
good time calibration signal reception, and then perform
a manual receive operation. See “To perform manual
receive” for more information.
Power Supply
This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its face is
pointing at a light source.
• The illustration shows how to position
a watch with a resin band.
• Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
• You should try to keep the watch
outside of your sleeve as much as
possible. Even if the face of the watch
is blocked from light only partially,
charging will be reduced significantly.
Battery Power Levels
The movement of the analog hands indicates the current battery power level.
Level
Use the Timekeeping Mode to set and view the current
time and date. This section also explains how to set the
current date and time manually.
• All of the operations in this section are performed in the
Timekeeping Mode.
Date
24-Hour hand
Timekeeping second hand
Hand Movement
Function Status
1
Normal
All functions enabled.
2
•Second hand jumps
every 2 seconds.
•Date changes to home
position.
•Second hand stopped.
•Hour and minute hands
stopped at 12 o’clock.
All functions disabled,
except for analog
timekeeping and
stopwatch.
All functions disabled.
3
Minute hand
Solar cell
Important!
• Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Make sure that the watch is exposed to bright light whenever
possible.
• This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
• Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 3 and when you have the battery replaced.
• Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to keep the rechargeable battery from going dead.
Timekeeping
Hour hand
Do this:
Use D.
Use B.
4. After setting the current time, press A to exit the
setting mode.
• This will cause the hands to move to the current time,
and resume normal movement.
Date
Stopwatch second hand
Use B (+).
3. Press C, and then use D and B to move the hour
and minute hands.
To toggle an alarm on and off
In the Alarm Mode, press C to toggle the alarm ON and OFF.
• The watch will beep when you turn on the alarm.
Adjusting the Home Positions
Do this:
Use D (+).
Jumps 2 seconds
• The second hand jumping every two seconds (Level 2) indicates that battery power
is quite low. Expose the watch to light as soon as possible to charge the battery.
• When battery power is at Level 2, time calibration signal reception is disabled.
• At Level 3, all functions are disabled and settings return to their initial factory
defaults. The analog hands will move to the current time and normal timekeeping will
resume when the battery is recharged sufficiently.
• Alarm operation can cause hand movement to stop due to the sudden temporary
drop in battery power. This does not indicate malfunction, and normal operation will
resume when the watch is exposed to light. Though hand movement stops,
timekeeping continues internally, and the hands will be adjusted to the correct
setting when normal operation returns.
3
Operation Guide 4350
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about four months.
• The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness)
Approximate Exposure Time
Outdoor sunlight (50,000 lux)
6 minutes
Sunlight through a window (10,000 lux)
30 minutes
Daylight through a window on a cloudy day (5,000
lux)
48 minutes
Indoor fluorescent lighting (500 lux)
8 hours
• GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* UTC is the world-wide scientific standard of timekeeping. It is based upon
carefully maintained atomic (cesium) clocks that keep time accurately to within
microseconds. Leap seconds are added or subtracted as necessary to keep UTC
in sync with the Earth’s rotation. The reference point for UTC is Greenwich,
England.
Power Saving
Power Saving enters a sleep state automatically whenever the watch is left for a
certain period in an area where it is dark. The table below shows how watch functions
are affected by Power Saving.
• There are actually two sleep state levels: “second hand sleep” and “function sleep”.
Elapsed Time in Dark
Operation
60 to 70 minutes
(second hand sleep)
Second hand only is stopped, all other functions are
enabled.
6 or 7 days
(function sleep)
• All functions, including analog timekeeping, disabled
• Internal timekeeping maintained
• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
• The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch
is already in the sleep state when 6:00 AM arrives, however, it will remain in the
sleep state.
To recover from the sleep state
Perform any one of the following operations.
• Move the watch to a well-lit area.
• Press any button.
• Since these are the specs, we can include all the technical details.
• Watch is not exposed to light
• Internal timekeeping
• Analog hands operational 18 hours per day, sleep state 6 hours per day
• 10 seconds of alarm operation per day
• 1 time calibration reception per day
• Stable operation is promoted by frequent charging.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Approximate Exposure Time
Level 3
Level 2
▲
▲
▲
Outdoor sunlight (50,000 lux)
Sunlight through a window
(10,000 lux)
Daylight through a window on
a cloudy day (5,000 lux)
Indoor fluorescent lighting
(500 lux)
Level 1
1 hour
21 hours
2 hours
77 hours
4 hours
–––
35 hours
–––
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Features
• If you leave the watch in the Home Position Adjustment Mode for two or three
minutes without performing any operation, it returns to the Timekeeping Mode
automatically.
• If you do not perform any operation for about two or three minutes while a setting
mode is selected, the watch will exit the setting mode automatically.
Scrolling
• The D and B button are used to change the hand setting in various setting modes.
In most cases, holding down these buttons will start high-speed movement of the
applicable hand(s) and day.
• High-speed movement of hands and day will continue until you press any button, or
until the moving hand(s) and day finishes one complete cycle.
- One complete cycle for the hands is one revolution (360 degrees) or 24 hours.
- One complete cycle for the day is 31 days.
Radio-controlled Atomic Timekeeping Precautions
• Strong electrostatic charge can result in the wrong time being set.
• The time calibration signal bounces off the ionosphere. Because of this, such factors
as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
• Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
• The current time setting in accordance with the time calibration signal takes priority
over any time settings you make manually.
• The watch is designed to update the date and day of the week automatically for the
period January 1, 2001 to December 31, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.
• This watch can receive signals that differentiate between leap years and non-leap
years.
• Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.
• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.
Timekeeping
• The year can be set in the range of 2001 to 2099.
• The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced or when battery power drops to
Level 3.
• The date will change automatically when the current time reaches midnight. The
date change at the end of the month may take more time than normal.
• The current time for all time zones in the Timekeeping Mode is calculated in
accordance with the Greenwich Mean Time (GMT) differential of each zone, based
on your Home Time Zone time setting.
4
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