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Operation Guide 3440 3441
E-40
Power Supply
This watch is equipped with a solar panel and a rechargeable battery that is charged
by the electrical power produced by the solar panel. The illustration shown below
shows how you should position the watch for charging.
Example:
Orient the watch so its face is
pointing at a light source.
• The illustration shows how to position a
watch with a resin band.
• Note that charging effi ciency drops when
any part of the solar panel is blocked by
clothing, etc.
• You should try to keep the watch outside of
your sleeve as much as possible. Charging
is reduced signifi cantly if the face is
covered only partially.
Solar panel
E-41
Important!
• 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 rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
possible.
• This watch uses a rechargeable battery to store power produced by the solar
panel, so regular battery replacement is not required. However, after very long use,
the rechargeable battery may lose its ability to achieve a full charge. If you
experience problems getting the rechargeable battery to charge fully, contact your
dealer or CASIO distributor about having it replaced.
• Never try to remove or replace the watch’s rechargeable battery yourself. Use of
the wrong type of battery can damage the watch.
• All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 5
(pages E-42 and E-43) and when you have the battery replaced.
• Turn on the watch’s Power Saving function (page E-53) and keep it in an area
normally exposed to bright light when storing it for long periods. This helps to keep
the rechargeable battery from going dead.
E-42
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level Battery Power Indicator Function Status
1 All functions enabled.
2
All functions enabled.
3
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
Illumination, and beeper disabled.
4
l
l
l
l
l
l
l
l
l
l
Except for timekeeping and the
C
(charge) indicator, all functions
and display indicators disabled.
Module 3441 charge indicator is
fl ashing
CHG
.
Battery power
indicator
E-43
Level Battery Power Indicator Function Status
5 All functions disabled.
• The fl ashing
L
and
LOW
indicators at level 3 tell you that battery power is very low,
and that exposure to bright light for charging is required as soon as possible.
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 after falling to Level 5, reconfi gure the
current time, date, and other settings.
• The watch’s Home City code setting will change automatically to
TYO
(Tokyo)
whenever the battery drops to Level 5.
• Display indicators reappear as soon as the battery is charged from Level 5 to Level
2.
• 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.
E-44
• Performing illumination, or beeper operations during a
short period may cause
(recover) to appear on
the display.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
• If (recover) appears frequently, it probably means
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
Recover indicator
E-45
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing 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.
Warning!
Leaving the watch in bright light to charge its rechargeable battery 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-46
Charging Guide
The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness) Approximate Exposure Time
Outdoor Sunlight (50,000 lux) 5 minutes
Sunlight Through a Window (10,000 lux) 24 minutes
Daylight Through a Window on a Cloudy Day (5,000 lux) 48 minutes
Indoor Fluorescent Lighting (500 lux) 8 hours
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifi cations (page E-59).
• Stable operation is promoted by frequent exposure to light.
E-47
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
(Brightness)
Approximate Exposure Time
Level 5 Level 4 Level 3
Level 2 Level 1
Outdoor Sunlight
(50,000 lux)
3 hours (Module 3440)
2 hours (Module 3441)
26 hours (Module 3440)
22 hours (Module 3441)
7 hours (Module 3440)
6 hours (Module 3441)
Sunlight Through a
Window (10,000 lux)
10 hours (Module 3440)
9 hours (Module 3441)
130 hours (Module 3440)
109 hours (Module 3441)
35 hours (Module 3440)
29 hours (Module 3441)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
19 hours (Module 3440)
16 hours (Module 3441)
263 hours (Module 3440)
221 hours (Module 3441)
71 hours (Module 3440)
59 hours (Module 3441)
Indoor Fluorescent
Lighting (500 lux)
228 hours (Module 3440)
190 hours (Module 3441)
– – – – – –
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
E-48
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Stopwatch
• You can use lap time measurement to time how long it takes to complete a specifi c
portion (such as a single lap) of a race.
• You can use split time measurement to time how long it takes to get from the start to
a specifi c point in a race.
Memory Management
Each time you press
D
to start a new elapsed time or lap/split operation in the
Stopwatch Mode (page E-17), the watch automatically creates a new “log” in its
memory. The log remains open for data storage until you permanently close it by
pressing
B
to reset the stopwatch to all zeros.
The watch has enough memory to hold up to 121 records. Each log title screen (start
date and time) and lap/split time uses up one record.
E-49
• A log title screen identifi es a single elapsed time operation, from the start up to the
point the stopwatch is reset to all zeros.
• A lap/split time record is stored under a log title screen each time you perform a
lap/split operation.
Example 1
Single elapsed time measurement
Log title screen + 120 lap records = 121 records
Example 2
Multiple elapsed time measurements
Measurement 1 log title screen + 60 lap records = 61 records
Measurement 2 log title screen + 59 lap records = 60 records
• Use the Recall Mode to view stopwatch records (page E-22).
• If watch memory is already full when you perform a stopwatch button operation that
creates a new log, the oldest log in memory and all of its records are deleted
automatically to make room for the new log.
• If you are adding records to the only log in memory and watch memory becomes
full, adding another record causes the oldest record in the log to be deleted
automatically to make room for the new record.