Operation Guide 4343
Solar Charging
Your watch runs on electrical power generated from light and stored by a chargeable battery. To ensure stable operation, make sure that the watch is exposed to light as much as possible.
• Whenever you are not wearing the watch on your wrist, position it | • When wearing the watch, try to keep your sleeve from blocking its | |||||||||
so the face (solar cell) is pointed in the direction of a source of | face, where the solar cell is located. | |||||||||
bright light. |
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Solar Cell |
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| Light |
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| Charging efficiency is reduced significantly even if the face of the |
Leave the watch under fluorescent lighting, near a window, etc. | watch is covered only partially by your sleeve. |
How the solar cell and battery work
When exposed to light
Light | Solar cell |
| (Converts light to power.) |
Electrical Energy
Charge
Rechargeable
Battery
Power supplied to watch
When not exposed to light
Rechargeable | Discharge |
Battery |
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Power supplied to watch
Your watch continues to operate even when it is not exposed to light. Leaving the watch in the dark can run down its battery and cause functions to become disabled.
Charging Precautions
Avoid charging the watch in the following locations, and anywhere else where the watch may become very hot.
•On the dashboard of an automobile parked in the sun
•Very close to an incandescent light source or other sources of heat
•In a location exposed to direct sunlight for long periods
Depending on the light source you are using, the case of the watch may become quite hot when charging. Take care to guard against burn injury after charging.
Low Battery Alert
When secondary battery power is low, the second hand of the watch will start to jump at
Normal Operation | Low Battery Alert | Disabled State |
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| Hands stop |
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| at 12 o’clock. |
| When battery | If power drops |
| even more... | |
| runs low | |
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30 | 1 | 1 |
| Home Position | |
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| The second, hour, and |
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| minute hands all stop at 12 |
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| o’clock. |
Jumps 1 second. | Jumps 2 seconds. |
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At midnight, the date indicator will change to 1 (which is the home position).
Important!The following functions are disabled when battery power is low.
•Auto receive and manual receive
•Alarm beeper
•Even if the battery level drops to the point that timekeeping stops, you still will be able to recharge the battery and use the watch again.
•When you recharge the battery after it drops to a level where timekeeping stops, the hands will move automatically to the current time setting.
•Try to keep the watch exposed to light as much as possible during normal use.
Charging Guide
•Required Charging Time for One Day of Operation
Based on six minutes of signal reception and 10 seconds of alarm per day.
Exposure Level (Brightness) | Charging Time |
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Outdoor Sunlight (50,000 lux) | 8 minutes |
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Sunlight through a Window (10,000 lux) | 30 minutes |
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Overcast Daylight through a Window (5,000 lux) | 48 minutes |
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Indoor Fluorescent Lighting (500 lux) | 8 hours |
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Making sure the watch is exposed to light ensures stable operation.
•Approximate Charge Times Required to Advance to a Higher Level
Exposure Level |
| Charging Time | |
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(Brightness) | Until Hand Movement | Until Full Charge | |
| Restarts |
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Outdoor Sunlight | 1 hours |
| 21 hours |
(50,000 lux) |
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Sunlight through a | 2 hours |
| 77 hours |
Window (10,000 lux) |
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Overcast Daylight through | 4 hours |
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a Window (5,000 lux) |
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Indoor Fluorescent | 35 hours |
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Lighting (500 lux) |
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•Note that the above charging times are for reference only. Actual charging time depends on a variety of environmental factors.
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