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Important!
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.
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
1
3
the 2 Second Hand in the Timekeeping Mode.
If the 2 Second Hand is moving normally at one-second intervals, power is
at Level 1.
If the 2 Second Hand is moving at two-second intervals, power is at Level
2, which is quite low. Expose the watch to light as soon as possible so it can
charge (Low battery alert).
Level Hand Movement
1
Normal.
2 2 Second Hand moves at two-second
2
intervals.
2
6
6 6 Day changes to 1 (home position).
Moves at two-second
2 2 Second Hand stopped.
intervals.
1 1 Hour Hand and 3 3 Minute Hand
3
stopped at 12 o'clock.
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.
E-8
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 actually are two sleep state levels: "second hand sleep" and "function sleep".
Elapsed Time in Dark
Operation
2 2 Second Hand only stopped at 12 o'clock, all other functions enabled
60 to 70 minutes (second hand sleep)
All functions, including timekeeping, disabled
6 or 7 days (function sleep)
Internal timekeeping maintained
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is already in a sleep
state when 6:00 AM arrives, however, it will remain in the sleep state.
The watch will not enter a sleep state while it is in the Stopwatch Mode.
To recover from the sleep state
Move the watch to a well-lit area or press any button.
E-10
Approximate Reception Ranges
UK and German Signals
Anthorn
500 kilometers
1,500 kilometers
The Anthorn signal is receivable
Mainfl ingen
within this area.
Japanese Signals
Fukushima
500 kilometers
Fukuoka/Saga
1,000 kilometers
E-12
Signal reception may be diffi cult or even impossible under the conditions described below.
Inside or among
Inside a vehicle
Near household
buildings
appliances,
offi ce
equipment, or a
mobile phone
3. What you should do next depends on whether you are using Auto Receive or Manual Receive.
Auto Receive: Leave the watch over night in the location you selected in step 2. See "Auto Receive"
on page E-14 for details.
Manual Receive: Perform the operation under "To perform manual receive" on page E-15.
Auto Receive
With Auto Receive, the watch performs the receive operation each day automatically up to six times (up
to fi ve times for the Chinese calibration signal) between the hours of midnight and 5 a.m. (according
to the Timekeeping Mode time). 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 only if it is in the
Timekeeping Mode. The receive operation is not performed if a calibration time is reached while you
are confi guring settings.
E-14
Operation Guide 5395 (OC)
Function Status
All functions enabled
Time calibration signal reception
disabled
All functions disabled
North American Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Chinese Signal
500 kilometers
Changchun
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
1,500 kilometers
Near a
Near high-
Among
construction
tension power
or behind
site, airport, or
lines
mountains
other sources of
electrical noise
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 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)
Operation *1
Outdoor sunlight (50,000 lux)
Window sunlight (10,000 lux)
30 minutes
Window sunlight on cloudy day (5,000 lux)
48 minutes
Indoor fl uorescent lighting (500 lux)
* 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.
For details about the operating time and daily operating conditions, see the "Power Supply" section of
the Specifi cations (page E-36).
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-23) 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:
LONDON (LON), PARIS (PAR), ATHENS (ATH)
HONG KONG (HKG)
TOKYO (TYO)
NEW YORK (NYC), CHICAGO (CHI),
DENVER (DEN), LOS ANGELES (LAX),
ANCHORAGE (ANC), HONOLULU (HNL)
Important!
The areas covered by HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration
signal transmitters, so certain conditions may cause reception problems.
Signal reception may not be possible at the distances noted below during certain times of the year or
day. Radio interference may also cause problems with reception.
−
Mainfl ingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)
−
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
−
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
−
Shangqiu (China) transmitter: 500 kilometers (310 miles)
As of June 2013, China does not use Daylight Saving Time (DST). If China 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 from the countries it
supports may result in incorrect time indication due to local application of summer time, etc.
To get ready for a receive operation
1. Confi rm that the watch is in the Timekeeping Mode. If it isn't, hold down B at least two seconds to
enter the Timekeeping Mode.
2. Place the watch in a location where signal reception is good.
12 o'clock
or
To perform manual receive
1. In the Timekeeping Mode (page E-19), keep A depressed (for about two seconds) as the 2 Second Hand
goes through the following sequence.
Moves to Y (or YES for some models) or N (NO) to indicate the last signal reception result, then to
R (READY).
2. The 2 Second Hand indicates the operations the watch is currently performing.
When the 2 2 Second Hand is
2
pointed here:
R (READY)
W (WORK)
Y (YES)
N (NO)
If signal reception is unstable, the 2 2 Second Hand may move between
W (WORK) and R (READY).
When the receive operation is successful, the watch adjusts the time
setting accordingly, and then resumes regular timekeeping. It does not
adjust the setting if the operation failed.
Note
To interrupt a receive operation and return to the Timekeeping Mode, press
any button.
Level Change *2
Daily
Level 3
Level 2
8 minutes
3 hours
7 hours
11 hours
8 hours
118 hours
The watch can receive the signal from the transmitter
located here:
Anthorn (England), Mainfl ingen (Germany)
Shangqiu City (China)
Fukushima (Japan), Fukuoka/Saga (Japan)
Fort Collins, Colorado (United States)
Position the watch as shown in the nearby illustration,
with 12 o'clock pointed towards a window. Make sure
there are no metal objects nearby.
Signal reception normally is better at night.
The receive operation takes from two to seven minutes,
but in some cases it can take as long as 14 minutes.
Take care that you do not perform any button operation
or move the watch during this time.
It means this:
Watch is setting up for reception.
Reception is in progress.
Reception was completed successfully.
Reception failed for some reason.
Level 1
29 hours
108 hours
175 hours
– – –
E-9
E-11
E-13
E-15
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