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Operation Guide 5135
4
Stopwatch
The stopwatch lets you measure elapsed times.
• The display range of the stopwatch is 59 minutes, 59.9
seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing B.
To measure times with the stopwatch
1/10 second
Seconds
Minutes
C
Start
C
Re-start
C
Stop
C
Stop
C
(About 1 second)
Clear
➤ ➤ ➤ ➤
Countdown Timer
You can set the countdown timer within a range of one to
100 minutes. An alarm sounds when the cowntdown
reaches zero.
• All of the operations in this section are performed in the
Countdown Timer Mode, which you enter by pressing
B.
Countdown End Beeper
The countdown end beeper lets you know when the
countdown reaches zero. The beeper stops after about 10
seconds or when you press any button.
Minutes
Seconds
To configure the countdown timer
1.While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the current
countdown start time starts to flash, which indicates the
setting screen.
• If the countdown start time is not displayed, use the
procedure under “To use the countdown timer” to
display it.
2.Press C to scroll the minute setting value.
• To specify a countdown time of 100 minutes, set
00:00.
3.Press A to exit the setting screen.
To use the countdown timer
Press C while in the Countdown Timer Mode to start the
countdown timer.
• The countdown timer operation continues even if you
exit the Countdown Timer Mode.
• Press C while a countdown operation is in progress to
pause it. Press C again to resume the countdown.
• To stop a countdown operation completely, hold down
C for about one second until the countdown time
returns to its starting value.
Current timer time
Power Supply
This watch is equipped with a solar cell and a rechargeable battery that is charged by
the electrical power produced by the solar cell. 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 efficiency drops when
any part of the solar cell is blocked by
clothing, etc.
• You should try to keep the watch outside of
your sleeve as much as possible. Charging
is reduced significantly if the face is
covered only partially.
Solar cell
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 cell, 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 and
when you have the battery replaced.
• Turn on the watch’s Power Saving function 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.
Level
1
2
3
4
5
Battery Power Indicator
(Charge Soon Alert)
Function Status
All functions enabled.
All functions enabled.
Watch enters Timekeeping Mode and second
hand jumps every two seconds. Auto and manual
receive, illumination, and beeper disabled.
All hands stop at 12 o’clock, all functions and
display indicators disabled.
All functions disabled.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
• The flashing indicator at Level 3 tells 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, reconfigure 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. With this Home City code setting, the watch is
configured to receive the time calibration signals of Japan. If you are using the watch
in North America or Europe, or China you will need to change the Home City code
setting to match your location 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.
• 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
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
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Approximate
Exposure Time
8 minutes
30 minutes
48 minutes
8 hours
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.
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifications.
• Stable operation is promoted by frequent exposure to light.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours 16 hours 5 hours
4 hours 58 hours 16 hours
7 hours 94 hours 26 hours
76 hours - - - - - - - - - - - - - - - -
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
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Timekeeping
Read This Before You Set the Time and Date!
This watch is preset with a number of city codes, each of which represents the time
zone where that city is located. When setting the time, it is important that you first
select the correct city code for your Home City (the city where you normally use the
watch). If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.
• Note that all of the times for the World Time Mode city codes are displayed in
accordance with the time and date settings you configure in the Timekeeping Mode.
• The watch automatically adjusts its analog setting to match the current digital setup
of your Home City. If the analog time is not correct even though you are sure the
digital setup of your Home City is correct and the watch is performing signal
reception properly, check the home positions of the hands and make adjustments if
necessary.
To set the time and date manually
1.In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
• The second hand will move to 12 o’clock and stop
there.
2.Press C to toggle between 12-hour (12H) and 24-hour
(24H) timekeeping.
3.Press B and the city code of the current Home City will
flash on the display.
4.Use C to select the city code you want.
• Make sure you select your Home City code before
changing any other setting.
• For full information on city codes, see the “City Code
Table”.