Operation Guide 5445
E-19
! For details about the operating time and daily operating conditions, see the “Power
Supply” (page E-70) section of the Specifi cations.
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-65).
! There actually are two sleep state levels: “display sleep” and “function sleep”.
Elapsed Time in Dark Digital Dials Operation
60 to 70 minutes (display sleep) Blank
Digital dials are off, but all functions
are enabled.
6 or 7 days (function sleep) Blank
Hour and minute hands stop at
12o’clock. All functions are disabled,
but timekeeping is maintained.
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 27 hours 8 hours
Window sunlight
(10,000 lux)
30 min. 8 hours
102 hours
28 hours
Window sunlight on
cloudy day (5,000 lux)
48 min. 13 hours
165 hours
44 hours
Indoor fl uorescent
lighting (500 lux)
8 hours 181 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.
! The above exposure times all are for reference only. Actual exposure times depend
on lighting conditions.
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 fl ashing 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 fl ashing. This indicates that the functions listed above
are enabled again.
! If all of the battery power indicators (H, M, L) are fl ashing and the CHG (charge)
message also is fl ashing, it means the battery level is very low. Expose the watch
to bright light as soon as possible.
! Frequent 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.
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, reconfi gure
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 fl ashing 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-63
To turn the button operation tone on and off ................................................ E-63
To turn Power Saving on and off .................................................................. E-65
Troubleshooting ............................................................................................... E-67
Specifi cations ................................................................................................... E-69
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