Operation Guide 3258
E-91 Using the Countdown Timer
E-95 Checking the Current Time in a Different Time Zone
E-97 Illumination
E-101 Other Settings
E-103 Troubleshooting
E-109 Specifications
Charging the Watch
The face of the watch is a solar cell that generates power from light. The generated power charges a
Charging Guide
Whenever you are not wearing the |
| When wearing the watch, make sure | |
watch, leave it in a location where it |
| that its face is not blocked from light | |
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is exposed to light. |
| by the sleeve of your clothing. | |
• Best charging performance is |
| • The watch may enter a sleep state | |
achieved by exposing the watch to |
| (page | |
the strongest light available. |
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| by your sleeve even only partially. |
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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.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
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Important!
•Allowing the watch to become very hot can cause its liquid crystal display to black out. The appearance of the LCD should become normal again when the watch returns to a lower temperature.
•Turn on the watch’s Power Saving function (page
•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. Expose the watch to bright light whenever possible.
Power Levels
You can get an idea of the watch’s power level by observing the battery power indicator on the display.
| Level Battery Power Indicator | Function Status |
| 1 | All functions enabled. |
| (H) | |
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| 2 | All functions enabled. |
| (M) | |
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Battery power |
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indicator | 3 | Auto and manual receive, illumination, |
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| (L) | beeper, and sensor operation disabled. |
| 4 | Except for timekeeping and the C (charge) |
| indicator, all functions and display | |
| (C) | |
| indicators disabled. | |
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| 5 | All functions disabled. |
•The flashing LOW indicator at Level 3 (L) tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.
•At Level 5, all functions are disabled and settings return to their initial factory defaults. Once the battery reaches Level 2 (M) after falling to Level 5, reconfigure the current time, date, and other settings.
•Display indicators reappear as soon as the battery is charged from Level 5 to Level 2 (M).
•Leaving the watch exposed to direct sunlight or some other very strong light source can cause the battery power indicator to show a reading temporarily that is higher than the actual battery level. The correct battery level should be indicated after a few minutes.
•All data stored in memory is deleted, and the current time and all other settings return to their initial factory defaults whenever battery power drops to Level 5 and when you have the battery replaced.
Power Recovery Mode
•Performing multiple sensor, illumination, or beeper operations during a short period may cause all of the battery power indicators (H, M, and L) to start flashing on the display. This indicates that the watch is in the power recovery mode. Illumination, alarm, countdown timer alarm, hourly time signal, and sensor operations will be disabled until battery power recovers.
•Battery power will recover in about 15 minutes. At this time, the battery power indicators (H, M, L) will stop flashing. This indicates that the functions listed above are enabled again.
•If all of the battery power indicators (H, M, L) are flashing and the C (charge) indicator also is flashing, it means the battery level is very low. Expose the watch to bright light as soon as possible.
•Even if battery power is at Level 1 (H) or Level 2 (M), the Digital Compass Mode, Barometer/ Thermometer Mode, or Altimeter Mode sensor may be disabled if there is not enough voltage available to power it sufficiently. This is indicated when all of the battery power indicators (H, M, L) are flashing.
•Frequent flashing of all of the battery power indicators (H, M, L) probably means that remaining battery power is low. Leave the watch in bright light to allow it to charge.
Charging Times
| Daily |
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| Level Change *2 |
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Exposure Level (Brightness) | Operation |
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| Level 5 | Level 4 | Level 3 | Level 2 | Level 1 | |||
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Outdoor sunlight (50,000 lux) | 5 min. |
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| 2 hours |
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| 12 hours | 3 hours | ||
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Sunlight through a window (10,000 lux) | 24 min. |
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| 5 hours |
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| 57 hours | 16 hours | ||
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Daylight through a window on a | 48 min. |
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| 9 hours |
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| 115 hours | 31 hours | ||
cloudy day (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 amount of exposure time required each day to generate enough power for normal daily operation.
*2 Approximate amount of exposure time (in hours) required to take power from one level to the next.
•The above exposure times all are for reference only. Actual exposure times depend on lighting conditions.
•For details about the operating time and daily operating conditions, see the “Power Supply” section of the Specifications (page
Power Saving
When turned on, 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.
•For information about enabling and disabling power saving, see “To turn Power Saving on and off” (page
•There actually are two sleep state levels: “display sleep” and “function sleep”.
Elapsed Time in Dark | Display | Operation | |
60 to 70 minutes (display sleep) | Blank, with PS flashing | Display is off, but all functions are enabled. | |
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6 or 7 days (function sleep) | Blank, with PS not flashing | All functions are disabled, but timekeeping is | |
maintained. | |||
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•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 or Countdown Timer Mode.
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 “Configuring 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: | ||
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LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW | Anthorn (England), Mainflingen (Germany) | |
HKG, BJS | Shangqiu City (China) | |
TPE, SEL, TYO | Fukushima (Japan), Fukuoka/Saga (Japan) | |
HNL, ANC, YVR, LAX, YEA, DEN, MEX, CHI, NYC, YHZ, | Fort Collins, Colorado (United States) | |
YYT | ||
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Important!
•The areas covered by MOW, HNL and ANC are quite far from the calibration signal transmitters, so certain conditions may cause reception problems.
•When HKG or BJS 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 configure Home City settings” (page
Approximate Reception Ranges
UK and German Signals | North American Signal |
Anthorn | 2,000 miles |
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500 kilometers |
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1,500 kilometers | 600 miles |
(1,000 kilometers) | |
The Anthorn signal is | Fort Collins |
receivable within this area | Mainflingen |
Japanese Signals | Chinese Signal | |
Fukushima | Changchun | |
500 kilometers | 500 kilometers | |
| Beijing | |
| Shangqiu | |
Fukuoka/Saga | Shanghai | |
Chengdu | ||
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| Hong Kong | |
1,000 kilometers | 1,500 kilometers | |
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Signals are receivable in the Taiwan area when reception conditions are good.