Operation Guide 5262
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
You can get an idea of the watch’s power level by observing the movement of the x Second Hand in the Timekeeping Mode. See “Hand Movement and Function Status” (page
If the x Second Hand is moving normally at
Low Battery Alert
If the x Second Hand is moving at
Moves at
Hand Movement and Function Status
Level | Hand Movement | Function Status | |
1 | Normal. | All functions enabled. | |
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| x Second Hand moving at | Beeper, time calibration signal | |
2 | intervals. | ||
m Day Indicator changes to 1 (home | reception disabled. | ||
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| position). |
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3 | x Second Hand stopped. | All functions disabled. | |
z Hour Hand and c Minute Hand | |||
| stopped at 12 o’clock. |
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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 overuse of the alarm tone 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.
ξWhen power drops to Level 3, all functions will be disabled but the watch will continue to keep time internally for about one week. If you recharge the battery sufficiently during this period, the analog hands will move automatically to the correct setting and regular timekeeping will resume. After one week, all settings (including timekeeping) will be cleared. Recharging the battery will reset all settings to their initial factory defaults.
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Charging Times
| Daily |
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| Level Change *2 | |||||
Exposure Level (Brightness) | Operation |
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| Level 3 | Level 2 |
| Level 1 | ||
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Outdoor sunlight (50,000 lux) | 8 minutes |
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| 2 hours |
| 23 hours | |||
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Window sunlight (10,000 lux) | 30 minutes |
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| 6 hours |
| 85 hours | |||
Window sunlight on cloudy day | 48 minutes |
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| 8 hours |
| – – – | |||
(5,000 lux) |
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Indoor fluorescent lighting (500 lux) | 8 hours |
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| 91 hours |
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*1 Approximate exposure each day to generate power for normal daily operation.
*2 Approximate amount exposure time required to take power up one level.
ξThe above exposure times all are for reference only. Actual exposure times depend on lighting conditions.
ξFor 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.
ξThere actually are two sleep state levels: “second hand sleep” and “function sleep”.
Elapsed Time in Dark | Operation | |
60 to 70 minutes (second hand sleep) | x Second Hand only stopped at 12 o’clock, all | |
other functions enabled | ||
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| ξ All functions, including analog timekeeping, | |
6 or 7 days (function sleep) | disabled |
ξInternal timekeeping maintained
ξThe 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.
ξThe watch will not enter a sleep state while it is in the Stopwatch Mode.
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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 “Confi guring Current Time and Date Settings Manually” (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:
LON, PAR, ATH | Anthorn (England), Mainflingen (Germany) |
HKG | Shangqiu City (China) |
TYO | Fukushima (Japan), Fukuoka/Saga (Japan) |
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HNL, ANC, LAX, DEN, CHI, NYC | Fort Collins, Colorado (United States) |
Important!
ξThe areas covered by HNL and ANC are quite far from the calibration signal transmitters, so certain conditions may cause reception problems.
ξWhen HNL or HKG is selected as the Home City, only the time and date are adjusted according to the time calibration signal. You need to switch manually between standard time and daylight saving time (DST) if required. See “To toggle the Home City time between standard time and daylight saving time” (page
Approximate Reception Ranges
UK and German Signals
Anthorn
500 kilometers
1,500 kilometers
Mainflingen
The Anthorn signal is receivable within this area.
North American Signal
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins