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Operation Guide 4319
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 4
(indicated by the flashing charge indicator (C)) from Level 5. You will not be able to
configure any of the other settings until the battery reaches Level 2 (no charge
indicator) after dropping to Level 5.
• Leaving the watch in direct sunlight or some other very strong light source can
cause the battery level indicator to show a reading that is momentarily higher than
the actual battery level. The correct battery level indicator should appear after a few
minutes.
• If you use the illumination or alarms a number of times during a short period, the
hands of the watch will stop. Battery Level Indicator will show
the following operations will become disabled until battery power recovers.
Illumination
Beeper tone
Time calibration signal reception
After some time, battery power will recover and the above functions will be enabled
again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
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 6 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)
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)
• For details about the battery operating time and daily operating conditions, see the
"Power Supply" section of the Specifications.
• Stable operation is promoted by frequent exposure to light.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
Approximate Exposure Time
(Brightness)
Level 5
Outdoor Sunlight
2 hours
(50,000 lux)
Sunlight Through a Window
6 hours
(10,000 lux)
Daylight Through a Window
9 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
100 hours
(500 lux)
• 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.
Power Saving Function
The Power Saving function enters a sleep state automatically whenever the watch is
left in an area where it is dark for a certain period. The table below shows how watch
functions are affected by the Power Saving function.
Approximate Period
in sleep state
• LCD off
3 to 4 days
• Alarm, hourly time signal, analog timekeeping and auto
receive enabled
• LCD off, alarm and hourly time signal disabled
8 days or more
• Analog timekeeping stopped at 12 o'clock
• Auto receive disabled
• The sleep state is indicated by a blank screen.
• Wearing the watch inside the sleeve of clothing can cause it to enter 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.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down A until the city
Power saving
code starts to flash, which indicates the setting screen.
on indicator
2. Press C ten times until the Power Saving on/off screen
appears.
3. Press D to toggle Power Saving on (
(
OF
).
4. Press A to exit the setting screen.
• The Power Saving on indicator is on the display in all
modes while Power Saving is turned on.
R
at this time. Also,
Approximate Exposure Time
8 minutes
27 minutes
43 minutes
8 hours
Level 4
Level 3
Level 2
Level 1
36 hours
10 hours
140 hours
38 hours
220 hours
61 hours
– – –
Functions
ON
) and off
Auto Return Features
• If you leave the watch in the Alarm Mode or Hand Setting Mode, or with the battery
level indicator displayed for two or three minutes without performing any operation, it
returns to the Timekeeping Mode automatically.
• If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
Radio-controlled 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 for the period
January 1, 2000 to December 31, 2099 automatically. 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.
• Normally, the signal reception date shown by the last signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the last signal screen shows the date as kept in the Timekeeping Mode at
the time of signal reception.
• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time with the precision noted in "Specifications".
• If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your Home City code, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.
Setting
Initial Factory Default
City code
TYO
(Tokyo)
DST (summer time)
(Auto switching)
Auto receive
(Auto receive)
Language
Japanese
Transmitters
This watch is designed to pick up the time calibration signals transmitted from Fort
Collins, Colorado in the United States, and from Fukushima and Fukuoka/Saga in
Japan.
• The following explains how the watch determines which transmitter it should check
first.
HKG, SEL, TYO City Codes
In this case:
The first signal auto search operation
after factory default settings are in effect,
or after the city code has been changed
Any case other than the above.
When
HNL
,
ANC
,
LAX
,
DEN
,
CHI
, or
the watch will receive the signal transmitted from Fort Collins, Colorado.
Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
• The day of the week is displayed in accordance with the date (year, month, and day)
settings automatically.
• The year can be set in the range of 2000 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.
• The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
• 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.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.
• With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59 without
any indicator.
The watch does this:
1. Checks the Fukushima signal first.
2. If the Fukushima signal cannot be
received, checks the Fukuoka/Saga
signal.
1. Checks the last successfully received
signal first.
2. If the last successfully received signal
cannot be received, checks the other
signal.
NYC
is selected as the Home City code,
5
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