Operation Guide 5285 (OC)
E-33 Using the Stopwatch
E-35 Auto Start
E-37 Adjusting Home Positions
E-40 Troubleshooting
E-44 Specifications
Charging the Watch
The face of the watch is a solar panel that generates power from light. The generated power charges a
Charging Guide
Whenever you are not |
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| When wearing the watch, makes |
wearing the watch, be sure |
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| sure that its face is not blocked |
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to leave it in a location where |
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| from light by the sleeve of your |
it is exposed to light. |
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| clothing. |
ξ Best charging |
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| ξ The watch may enter a sleep |
performance is achieved |
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| state (page |
by exposing the watch to |
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| blocked by your sleeve even |
light that is as strong as |
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| only partially. |
possible. |
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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.
ξOn the dashboard of a car parked in direct sunlight
ξToo close to an incandescent lamp
ξUnder direct sunlight
Important!
ξKeep 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.
ξStoring 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
ξWhen 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 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
Moves at
You can get an idea of the watchÕs power level by observing the movement of the x Second Hand.
ξIf the x Second Hand is moving normally at
ξIf the x Second Hand is moving at
Level | Hand Movement | Function Status | |
1 | Normal. | All functions enabled | |
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2 | x Second Hand moves at | Time calibration signal reception and | |
home position adjustment disabled | |||
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| x Second Hand stopped. |
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3 | z Hour Hand and c Minute Hand | All functions disabled | |
stopped at 12 o’clock. | |||
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| . Day Indicator between 31 and 1. |
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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
| Daily |
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| Level Change *2 |
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Exposure Level (Brightness) |
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| Level 3 |
| Level 2 |
| Level 1 | |||
Operation *1 |
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Outdoor sunlight (50,000 lux) | 8 minutes |
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| 2 hours |
| 24 hours | |||
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Window sunlight (10,000 lux) | 30 minutes |
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| 6 hours |
| 89 hours | |||
Window sunlight on cloudy day (5,000 lux) | 48 minutes |
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| 9 hours |
| 144 hours | |||
Indoor fluorescent lighting (500 lux) | 8 hours |
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| 97 hours |
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*1 Approximate exposure each day to generate power for normal daily operation.
*2 Approximate exposure to take power up one level.
ξ The above times are for reference only. Actual times depend on lighting conditions. |
ξWhen 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 configure settings again.
ξ For details about the operating time and daily operating conditions, see the “Power Supply” section of |
the Specifications (page |
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 | ξ All hands stopped at 12 o’clock | |
ξ Internal timekeeping maintained | ||
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To recover from the sleep state
Move the watch to a
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 ÒConÞ guring Current Time and Date Settings ManuallyÓ (page
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: | ||
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LONDON (LON), PARIS (PAR), ATHENS (ATH) | Anthorn (England), Mainflingen (Germany) | |
HONG KONG (HKG) | Shangqiu City (China) | |
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TOKYO (TYO) | Fukushima (Japan), Fukuoka/Saga (Japan) | |
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NEW YORK (NYC), CHICAGO (CHI), |
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DENVER (DEN), LOS ANGELES (LAX), | Fort Collins, Colorado (United States) | |
ANCHORAGE (ANC), HONOLULU (HNL) |
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Important!
ξ The areas covered by HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration signal transmitters, so certain conditions may cause reception problems.
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Approximate Reception Ranges
UK and German Signals
Anthorn 
500 kilometers
1,500 kilometers
The Anthorn signal is receivable | Mainflingen | |
within this area. | ||
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Japanese Signals
Fukushima
500 kilometers
Fukuoka/Saga 
1,000 kilometers
North American Signal
| 2,000 miles |
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| 600 miles |
| (1,000 kilometers) |
| Fort Collins |
Chinese Signal | |
500 kilometers | Changchun |
| Beijing |
| Shangqiu |
| Shanghai |
| Chengdu |
| Hong Kong |
1,500 kilometers
ξSignal 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.
−Mainflingen (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)
ξAs of June 2012, 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 for the China time zones.
ξUsing 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.ConÞ rm that the watch is in the Dual Time Mode. If it isnÕt, hold down Cat least two seconds to enter the Dual Time Mode.
2.Place the watch in a location where signal reception is good.
ξPosition the watch as shown in the nearby illustration, with 12 o’clock pointed towards a window. Make sure
12 o’clock | there are no metal objects nearby. | |
ξ Signal reception normally is better at night. | ||
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or | ξ The receive operation takes from two to 10 minutes, but | |
in some cases it can take as long as 20 minutes. Take | ||
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| care that you do not perform any button operation or | |
| move the watch during this time. |