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Operation Guide 4343
2
How the solar cell and battery work
When exposed to light
Light
Power supplied to watch
Solar cell
(Converts light to power.)
Electrical Energy
Charge
Rechargeable
Battery
When not exposed to light
Power supplied to watch
Discharge
Rechargeable
Battery
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.
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
so the face (solar cell) is pointed in the direction of a source of
bright light.
Light
Solar Cell
Leave the watch under fluorescent lighting, near a window, etc.
• When wearing the watch, try to keep your sleeve from blocking its
face, where the solar cell is located.
Charging efficiency is reduced significantly even if the face of the
watch is covered only partially by your sleeve.
Charging Guide
• Required Charging Time for One Day of Operation
Based on six minutes of signal reception and 10 seconds of alarm
per day.
Charging Time
8 minutes
30 minutes
48 minutes
8 hours
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight through a Window (10,000 lux)
Overcast Daylight through a Window (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Making sure the watch is exposed to light ensures stable operation.
• Approximate Charge Times Required to Advance to a Higher
Level
– – –
– – –
1 hours
2 hours
4 hours
35 hours
21 hours
77 hours
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight through a
Window (10,000 lux)
Overcast Daylight through
a Window (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
Charging Time
Until Hand Movement
Restarts
Until Full Charge
• Note that the above charging times are for reference only. Actual
charging time depends on a variety of environmental factors.
Low Battery Alert
When secondary battery power is low, the second hand of the watch will start to jump at 2-second intervals to let you know that charging is
required.
1
1
30
Normal Operation Disabled StateLow Battery Alert
Important!
The following functions are disabled
when battery power is low.
• Auto receive and manual receive
• Alarm beeper
Jumps 1 second.
Jumps 2 seconds.
Home Position
At midnight, the date
indicator will change to 1
(which is the home
position).
The second, hour, and
minute hands all stop at 12
o’clock.
When battery
runs low
If power drops
even more...
Hands stop
at 12 o’clock.
• 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.
Solar Charging