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Operation Guide 5251 (OC)
E-23
To check the current location setting
Pull the crown out to the fi rst click.1.
The
x
x
Second Hand will move to the currently selected location.
Push the crown back in.2.
The
x
x
Second Hand will perform movement that indicates
whether the watch’s battery requires charging. After that, regular
timekeeping will resume. See “To use the charging guide” (page
E-13).
To change the location setting
Pull out the crown to the fi rst click. 1.
The
x
x
Second Hand will move to the currently selected location.
Rotate the crown to move the 2.
x
Second Hand to the location
setting you want to use.
Important!
Leaving the crown pulled out for more than two minutes without
x
performing any operation will automatically cause setting operation
to become disabled. If this happens, press the crown back in and
then pull it out again to confi gure settings.
E-22
Confi guring Time and Date Settings
Normally time and date settings are confi gured automatically when a time calibration signal is received in
accordance with your location setting.
Important!
Whenever you are in an area where a signal cannot be received or if your location setting does not
x
support signal reception, you will need to confi gure time settings manually. See “Confi guring Time and
Date Settings Manually” (page E-24).
Location Setting
Select one of the location settings shown below in accordance with your current location.
In China CN (HKG, HONG KONG)
In Japan JP (TYO, TOKYO)
Any other location OFF (Receive off)
Setting the wrong location can make reception impossible or may result in incorrect time settings. See
“Radio Controlled Atomic Timekeeping” (page E-16).
Important!
When using this watch in China, set
x CN (HKG, HONG KONG) as the location.
E-21
To check the result of the latest receive operation
Press 1. A.
The
x
x
Second Hand will indicate the result of the last receive operation.
Y (YES) Receive successful
N (NO) Receive failed
Press 2. A to return to regular timekeeping. Regular timekeeping also will
resume if no operation is performed for about fi ve seconds.
Note
The x x
x
Second Hand will indicate N (NO) if you have adjusted the time
setting manually since the latest receive operation.
Radio-controlled Atomic Timekeeping Precautions
Strong electrostatic charge can result in the wrong time setting.
x
Even if a receive operation is successful, certain conditions can cause the time setting to be off by up x
to one second.
The watch is designed to update the date automatically for the period January 1, 2000 to December x
31, 2099. Updating of the date by signal reception will no longer be performed starting from January
1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time with the precision
x
noted in “Specifi cations” (page E-36).
The receive operation is disabled under any of the following conditions.
x
While the battery charge level is at Level 3 or lower (page E-11) −
While the watch is in the function sleep state (power saving, page E-14) −
@
E-20
To perform manual receive
Hold down 1. A for at least two seconds.
The
x
x
Second Hand will fi rst indicate the last receive results as either Y
(YES) or N (NO), and then move to RC (Receive in progress) to indicate
that signal reception has started.
The watch’s time setting is adjusted automatically whenever a receive 2.
operation is successful.
Note
It can take as long as 30 seconds for signal reception conditions to
x
stabilize.
If you want to stop a receive operation at any time, press x A.
If reception fails for some reason, check the surrounding area and eliminate x
possible causes for failure and then try again. See “To get ready for a
receive operation” (page E-18).
@
E-19
Signal reception may be diffi cult or even impossible under the conditions described below. x
Inside or among
buildings
Inside a vehicle Near household
appliances,
offi ce
equipment, or a
mobile phone
Near a
construction
site, airport, or
other sources of
electrical noise
Near high-
tension power
lines
Among
or behind
mountains
What you should do next depends on whether you are using Auto Receive or Manual Receive.2.
Auto Receive: Leave the watch over night in the location you selected in step 1. See “Auto Receive” x
below for details.
Manual Receive: Perform the operation under “To perform manual receive” on page E-20. x
Auto Receive
With Auto Receive, the watch performs the receive operation each day automatically. Reception times
x
depend on the location settings: 2:00, 3:00, and 4:00 a.m. for JP (TYO, TOKYO), and 1:00, 2:00, and
3:00 a.m. for CN (HKG, HONG KONG). When any receive operation is successful, none of the other
receive operations for that day are performed.
When a calibration time is reached, the watch will perform the receive operation. The receive operation
x
is not performed if a calibration time is reached while you are confi guring settings.
E-18
Even when the watch is within range of a transmitter, signal reception may be impossible due to the x
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 above conditions becomes even greater.
Signal reception may not be possible at the distances noted below during certain times of the year or
x
day. Radio interference may also cause problems with reception.
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 does go to the x
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 that is different from the countries it
x
supports may result in incorrect time indication due to local application of summer time, etc.
To get ready for a receive operation
Place the watch in a location where signal reception is good.1.
Position the watch as shown in the nearby illustration, with the part
x
of the dial between 7 and 8 o’clock pointed towards a window. Make
sure there are no metal objects nearby.
Signal reception normally is better at night.
x
The receive operation takes from three to eight minutes, but in some x
cases it can take as long as 18 minutes. Take care that you do not
perform any button operation or move the watch during this time.
7 to 8 o’clock
E-17
Approximate Reception Ranges
Japanese Signal Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun
500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
E-16
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 Time and Date Settings Manually” (page E-24) for more
information.
This section explains how the watch updates its time settings when the city name selected as the current
location is in Japan or China, and is one that supports time calibration signal reception.
If your location setting is this: The watch can receive the signal from the transmitter located here:
CN (HKG, HONG KONG) Shangqiu City (China)
JP (TYO, TOKYO) Fukushima (Japan), Fukuoka/Saga (Japan)
OFF No signal received