Stopwatch; Countdown Timer; Alarms; Power Supply - Casio 5161 Operation Manual

Operation Guide 5161

Stopwatch

The stopwatch lets you measure elapsed times.
• The display range of the stopwatch is 59 minutes, 59.99
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
Seconds Stopwatch Mode, which you enter by pressing B (page
E-9).
Minutes
To measure times with the stopwatch
C
C ➤ C ➤
Start Stop Re-start
E-40

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 (page E-9).
Countdown End Beeper
The countdown end beeper lets you know when the
Minutes
countdown reaches zero. The beeper stops after about 10
Seconds
seconds or when you press any button.
E-42
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
Current timer time
returns to its starting value.
E-44
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.
• The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 5 (pages E-47 and E-48) and when you have the
battery replaced.
• Turn on the watch's Power Saving function (page E-69) 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-46
• 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.
E-48
C C
➤ ➤
(About 1 second)
Stop
Clear
While an elapsed time operation is stopped, the display alternates between two
screens that show the current minutes and seconds, and the 1/100 seconds count.
About 1 second
Seconds
Minutes
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" (page
E-44) 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.

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.
Battery Power Indicator and Recover Indicator
In the Timekeeping Mode, press B to enter the Battery/Receive Mode.
The battery power indicator on the display shows you the current status of the
rechargeable battery's power.
Level Battery Power Indicator
1 All functions enabled.
2 All functions enabled.
3 Watch enters Timekeeping Mode and second
hand jumps every two seconds. Auto and manual
(Charge Soon Alert) receive, illumination, and beeper disabled.
4 All hands stop at 12 o'clock, all functions and
display indicators disabled.
5 All functions disabled.
• Performing illumination, or beeper operations during a
short period may cause
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
Recover indicator
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
1/100 seconds
E-41
E-43
Solar cell
E-45
Function Status
E-47
(recover) to appear on the
E-49