Operation Guide 5198
E-29
Even when the watch is within range of a transmitter, signal reception may be
x
impossible due to the effects of geographic contours, structures, weather, the time
of year, the time of day, radio interference, etc. The signal becomes weaker at
distances of approximately 500 kilometers, which means that the infl uence of the
conditions listed above becomes even greater.
Signal reception may not be possible at the distances noted below during certain
x
times of the year or day. Radio interference may also cause problems with
reception.
Mainfl ingen (Germany) or Anthorn (England) transmitter: 500 kilometers (310 miles)
−
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
−
Fukushima or Fukuoka/Saga (Japan) transmitter: 500 kilometers (310 miles)
−
Shangqiu (China) transmitter: 500 kilometers (310 miles)
−
As of December 2010, China does not use Daylight Saving Time (DST). If China
x
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.
Using this watch in a country covered by a time calibration signal that is different
x
from the countries it supports may result in incorrect time indication due to local
application of daylight saving time, etc.
E-28
Japanese Signals
Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun
500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
E-27
Approximate Reception Ranges
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-26
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)
HONOLULU (HNL), ANCHORAGE (ANC),
LOS ANGELES (LAX), DENVER (DEN),
CHICAGO (CHI), NEW YORK (NYC)
Fort Collins, Colorado (United States)
Important!
The areas covered by
x
HONOLULU
(
HNL
) and
ANCHORAGE
(
ANC
) are quite far
from the calibration signal transmitters, so certain conditions may cause reception
problems.
E-25
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 Settings Manually” (page E-46) 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.
E-24
To recover from the sleep state
Move the watch to a well-lit area, press the
A
button, or pull out the crown to the
fi rst click.
It can take up to eight minutes for the watch to resume normal operation after
x
recovering from the sleep state. Do not perform any button operations during that
time.
E-23
Power Saving
A Power Saving feature causes the watch to enter a sleep state automatically
whenever it is left for a certain period in an area where it is dark.
How Power Saving works
The watch will enter the sleep state if it is left in a dark location for about one week.
In the sleep state:
x
All hands stop at 12 o’clock.
−
Auto Receive is disabled.
−
Internal timekeeping continues to operate normally.
−
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch
x
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep
state.
E-22
Charging Times
Exposure Level (Brightness)
Daily
Operation
*1
Level Change *2
Level 4
Level 3
Level 2
Level 1
Outdoor sunlight (50,000 lux)
8 minutes
2 hours
25 hours
Window sunlight (10,000 lux)
30 minutes
4 hours
93 hours
Window sunlight on cloudy day
(5,000 lux)
48 minutes
6 hours
151 hours
Indoor fl uorescent lighting
(500 lux)
8 hours
59 hours
– – –
1 Approximate exposure each day to generate power for normal daily operation.
*
2 Approximate exposure to take power up one level.
*
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
x
Supply” section of the Specifi cations (page E-61).
E-21
The current charging requirement is indicated whenever you push the crown back
x
in from the fi rst click.
Failure to expose the watch to light when charging is required will cause the charge
x
to be reduced even further.
The charging guide is based on a calculated value (not the actual battery charge).
x
Because of this, the battery charge may go low even if the charging guide indicates
that immediate charging is not required. If this happens, expose the watch to light
as soon as possible to charge the battery.
E-20
To use the charging guide
Pull the crown out to the fi rst click. The
1.
x
Second Hand
will move to the currently
selected Home City. Next, push the crown back in.
For about one second, the
x
x
Second Hand
will perform movement that indicates
whether the watch’s battery requires charging.
@
Charge is very low.
Leave the watch in bright
light for long time until
charged.
Battery is charged.
Charge is low.
Consider leaving the watch in
light for charging.
Charge is low.
Leave the watch in light for charging.