Operation Guide 3219
E-58 Using the Stopwatch
E-61 Using the Countdown Timer
E-70 Troubleshooting
E-76 Specifications
E-64 Illumination
E-66 Other Settings
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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 |
| When wearing the watch, |
wearing the watch, leave |
| make sure that its face is |
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it in a location where it is |
| not blocked from light by |
exposed to light. |
| the sleeve of your clothing. |
ξ Best charging |
| ξ The watch may enter a |
performance is achieved |
| sleep state (page |
by exposing the watch |
| its face is blocked by your |
to the strongest light |
| sleeve even only partially. |
available. |
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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
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Important!
ξAllowing 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.
ξTurn on the watch’s Power Saving function (page
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. 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.
Battery power indicator | Level | Battery Power | Function Status |
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| All functions enabled. |
| (H) |
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| 2 |
| All functions enabled. |
| (M) |
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| 3 |
| Auto and manual receive, |
| (L and |
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| illumination, and beeper disabled. | |
| LOW) |
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4Except for timekeeping and the CHG (charge) indicator, all functions
(CHG) | and display indicators disabled. |
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5 | All functions disabled. |
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ξThe fl ashing 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.
ξAt 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, reconfi gure the current time, date, and other settings.
ξDisplay indicators reappear as soon as the battery is charged from Level 5 to Level 2 (M).
ξLeaving 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.
ξThe 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
ξPerforming illumination or beeper operations during a short period may cause all of the battery power indicators (H, M, and L) to start fl ashing on the display. This indicates that the watch is in the power recovery mode. Illumination, alarm, countdown timer alarm, and hourly time signal operations will be disabled until battery power recovers.
ξBattery power will recover in about 15 minutes. At this time, the battery power indicators (H, M, L) will stop fl ashing. This indicates that the functions listed above are enabled again.
ξIf all of the battery power indicators (H, M, L) are fl ashing and the CHG (charge) indicator also is fl ashing, it means the battery level is very low. Expose the watch to bright light as soon as possible.
ξFrequent fl ashing 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.
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Charging Times
Exposure Level | Daily |
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| Level Change *2 |
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(Brightness) | Operation |
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| Level 5 | Level 4 | Level 3 | Level 2 | Level 1 | |||
*1 |
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Outdoor sunlight | 5 min. |
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| 3 hours |
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| 21 hours | 6 hours | ||
(50,000 lux) |
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Window sunlight | 24 min. |
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| 10 hours |
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| 107 hours | 29 hours | ||
(10,000 lux) |
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Window sunlight on | 48 min. |
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| 16 hours |
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| 216 hours | 58 hours | ||
cloudy day (5,000 lux) |
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Indoor fl uorescent | 8 hours |
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| 184 hours |
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lighting (500 lux) |
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*1 Approximate exposure each day to generate power for normal daily operation.
*2 Approximate exposure time (in hours) 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 Specifi cations (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.
ξFor information about enabling and disabling power saving, see “To turn Power Saving on and off”(page
ξThere actually are two sleep state levels: “display sleep” and “function sleep”.
Elapsed Time in Dark | Display | Operation | |
60 to 70 minutes | Blank, with PS fl ashing | Display is off, but all functions are | |
(display sleep) | enabled. | ||
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6 or 7 days (function sleep) | Blank, with PS not | All functions are disabled, but | |
fl ashing | timekeeping is maintained. | ||
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