Filter
Top Products
Operation Guide 5286 (OC)
E-15
Approximate Reception Ranges
Japanese Signals Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/
Saga
1,500 kilometers
Changchun500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainfl ingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
E-14
Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. However, when
using the watch outside of areas covered by time calibration signals, you will have to adjust the settings
manually as required. See “Confi guring Current Time and Date Settings Manually” (page E-28) for more
information.
This section explains how the watch updates its time settings when the city code selected as the Home
City is in Japan, North America, Europe, or China, and is one that supports time calibration signal
reception.
If your Home City Code setting is this:
The watch can receive the signal from the transmitter
located here:
LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainfl ingen (Germany)
HONG KONG (HKG) Shangqiu City (China)
TOKYO (TYO) Fukushima (Japan), Fukuoka/Saga (Japan)
NEW YORK (NYC), CHICAGO (CHI),
DENVER (DEN), LOS ANGELES (LAX),
ANCHORAGE (ANC), HONOLULU (HNL)
Fort Collins, Colorado (United States)
Important!
x The areas covered by HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration
signal transmitters, so certain conditions may cause reception problems.
E-13
x The above times are for reference only. Actual times depend on lighting conditions.
x For details about the operating time and daily operating conditions, see the “Power Supply” section of
the Specifi cations (page E-54).
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.
Elapsed Time in Dark Operation
Approximately 1 week
x All hands stopped at 12 o’clock
x Internal timekeeping maintained
To recover from the sleep state
Move the watch to a well-lit area or press any button.
E-12
x When power drops to Level 3, all settings (including timekeeping) will be cleared. Recharging the
battery will reset all settings to their initial factory defaults, so you will need to confi gure settings again.
x When the watch is at Level 3, exposing it to light for a while will cause the
x
Second Hand to move to
the position of second 57. This indicates that charging has started.
Power Recovery Mode
The watch is designed to go into a power recovery mode that stops hand operation temporarily whenever
power suddenly drops below a certain level due to continuous signal reception, or overuse of the alarm
tone over a short period or other operations over a short period. Note that all operations are disabled
while the watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal operation after power
recovers (in about 15 minutes). Putting the watch in a location where it is exposed to light will help power
to recover sooner.
Charging Times
Exposure Level (Brightness)
Daily
Operation *1
Level Change *2
Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 8 minutes 2 hours 23 hours
Window sunlight (10,000 lux) 30 minutes 6 hours 86 hours
Window sunlight on cloudy day (5,000 lux) 48 minutes 9 hours 139 hours
Indoor fl uorescent lighting (500 lux) 8 hours 94 hours – – –
* 1 Approximate exposure each day to generate power for normal daily operation.
* 2 Approximate exposure to take power up one level.
E-11
Important!
x Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps
to ensure that power does not run down.
x 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 power to run down. Make sure that the watch is exposed to
bright light whenever possible.
Power Levels
You can get an idea of the watch’s power level by observing the movement of
the
x
Second Hand.
x If the
x
Second Hand is moving normally at one-second intervals, power is
at Level 1.
x If the
x
Second Hand is moving at two-second intervals, power is at Level 2,
which is quite low (Low battery alert). Expose the watch to light as soon as
possible so it can charge.
Level Hand Movement Function Status
1 Normal. All functions enabled
2
x
x
Second Hand moves at
two-second intervals.
Beeper, time calibration signal
reception, countdown timer
operation, and home position
adjustment disabled
3
All hands stopped at 12 o’clock.
.
.
Day Indicator between 31 and 1.
All functions disabled
Moves at two-second
intervals.
+
@
B
E-10
Charging the Watch
The face of the watch is a solar panel that generates power from light. The generated power charges a
built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed
to light.
Charging Guide
Whenever you are not
wearing the watch, be sure
to leave it in a location where
it is exposed to light.
x Best charging
performance is achieved
by exposing the watch to
light that is as strong as
possible.
When wearing the watch, makes
sure that its face is not blocked
from light by the sleeve of your
clothing.
x The watch may enter a sleep
state (page E-13) if its face is
blocked by your sleeve even
only partially.
Warning!
Leaving the watch in bright light for charging 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.
x On the dashboard of a car parked in direct sunlight
x Too close to an incandescent lamp
x Under direct sunlight
E-9
E-44 Adjusting the Hand and Day Home Positions
E-46 To adjust the hand and day home positions
E-48 Troubleshooting
E-53 Specifi cations
E-8
E-32 Checking the Current Time in a Different Time Zone
E-32 To enter the Dual Time Mode
E-32 To view the time in another time zone
E-34 To swap your Home City and World Time City
E-35 Using the Stopwatch
E-35 To enter the Stopwatch Mode
E-35 To measure elapsed time
E-36 To measure split times
E-37 Auto Start
E-37 To enter the Stopwatch Mode
E-37 To set the Auto Start Time
E-38 To start an Auto Start operation
E-39 Using the Countdown Timer
E-39 To enter the Countdown Timer Mode
E-40 To specify the countdown start time
E-40 To perform a countdown timer operation
E-41 To stop the alarm
E-42 Using the Alarm
E-42 To enter the Alarm Mode
E-42 To change the alarm time setting
E-43 To turn the alarm on or off
E-43 To stop the alarm