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Operation Guide 5581
E-19
• 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” (page E-69) section of the Specifications.
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 E-64).
• There actually are two sleep state levels: “display sleep” and “function sleep”.
E-18
Charging Times
Exposure Level
(Brightness)
Daily
Operation
*1
Level Change *2
Level 5 Level 4 Level 3 Level 2 Level 1
Outdoor sunlight
(50,000 lux)
8 min. 3 hours 28 hours 8 hours
Window sunlight
(10,000 lux)
30 min. 8 hours 106 hours 29 hours
Window sunlight on
cloudy day (5,000 lux)
48 min. 13 hours 172 hours 46 hours
Indoor fluorescent
lighting (500 lux)
8 hours 182 hours – – – – – –
*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.
E-17
Power Recovery Mode
• Performing multiple illumination, beeper, and/or high-speed hand movement
operation during a short period may cause all of the battery power indicators (
H
,
M
,
and
L
) to start flashing in the lower digital dial. 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.
• 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
CHG
(charge)
message also is flashing, it means the battery level is very low. Expose the watch to
bright light as soon as possible.
• 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.
E-16
• 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.
• 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.
E-15
Level
Battery Power Indicator
Function Status
1
(H)
All functions enabled.
2
(M)
All functions enabled.
3
(L and
LOW)
Illumination and beeper disabled.
Except for Timekeeping Mode, all other modes
disabled.
4
(CHG)
All functions and display indicators disabled except
for timekeeping and display of
CHG
(charge) in the
lower digital dial.
Hour and minute hands stopped at 12 o’clock.
5
All functions disabled.
• The flashing
LOW
message 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.
E-14
Power Levels
You can get an idea of the watch’s power level by observing the battery power
indicator in the lower digital dial.
Battery power indicator
E-13
Important!
• Allowing the watch to become very hot can cause the digital displays 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 E-19) and keep it in an area normally
exposed to bright light when storing it for long periods. This helps to ensure that
power does not run down.
• 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.
E-12
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
E-11
Charging the Watch
The face of the watch is a solar panel that generates power from light. The generated
power charges a built-in rechargeable battery, which powers watch operations. The
watch charges whenever it is exposed to light.
Charging Guide
Whenever you are not
wearing the watch, leave it
in a location where it is
exposed to light.
• Best charging
performance is achieved
by exposing the watch to
the strongest light
available.
When wearing the watch,
make sure that its face is
not blocked from light by the
sleeve of your clothing.
• The watch may enter a
sleep state (page E-19) if its
face is blocked by your
sleeve even only partially.
E-10
Other Settings …………………………………………………………………………E-62
To turn the button operation tone on and off …………………………………E-62
To turn Power Saving on and off ………………………………………………E-64
Troubleshooting ………………………………………………………………………E-66
Specifications …………………………………………………………………………E-68
Operating Precautions ………………………………………………………………E-70
User Maintenance ……………………………………………………………………E-81
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