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USER’S GUIDE 2367/2739
4
Alarm Operation
The alarm sounds at the preset time for about 10 seconds in all modes, or until you
stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press D to select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to is selected, press A to turn
it on and off.
• The alarm on indicator (
) and the Hourly Time Signal on indicator ( ) are
shown on the display in all modes while these functions are turned on.
• If any alarm is on, the alarm on indicator is shown on the display in all modes.
Stopwatch
The stopwatch lets you measure elapsed time, split
times, and two finishes.
• The display range of the stopwatch is 23 hours, 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 Stopwatch Mode, which you enter by pressing
C.
Seconds
1/100 second
Hours
Minutes
To measure times with the stopwatch
D
Start Stop
Elapsed Time
➤
Re-start Clear
D ➤
Stop
D
➤
D
➤
A
Split Time
D
Start Split
➤
Split release
Clear
A ➤
Stop
A
➤
D ➤
A
Two Finishes
D
Start Split
➤
Stop
Clear
A
➤
Split release
D ➤
A
➤
A
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the 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 normally exposed to light whenever
possible.
• This watch employs a solar cell that converts light into electricity that charges a built-
in rechargeable battery. Normally, the rechargeable battery should not need
replacement, but after very long use over a number of years, the rechargeable
battery may lose its ability to achieve a full charge. Should you notice problems with
getting the rechargeable battery to a full charge, contact your dealer or CASIO
distributor about having the rechargeable battery replaced.
• The rechargeable battery should be replaced with a CASIO-specified CTL1616 battery
only. Other rechargeable batteries can cause damage to the watch.
• Turn on the watch’s sleep mode and keep it in an area normally exposed to light
when storing it for long periods. This helps to keep the rechargeable battery from
going dead.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
Battery Power
Indicator
Function Status
All functions enabled.
All functions enabled.
Auto and manual signal receive,
alarm, hourly time signal, backlight,
and display are disabled. Though
the hands of the watch do not
move, time continues to be kept
internally.
All functions, including timekeeping,
are disabled.
l
l
l
l
l
l
l
l
l
l
l
l
Battery power
indicator
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 sunlight to charge its rechargeable battery can cause it to
become quite hot. Take care when handling the watch to avoid burn injury.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight or in any other area exposed to intense heat for long periods
• At Level 4, all functions are disabled. Functions are enabled once again after the
rechargeable battery is charged, but anything previously stored in memory is lost.
Because of this, you must set the current time and alarms, and re-input Telememo
records after the rechargeable battery is charged.
• Leaving the watch in direct sunlight or some other very strong light source can
cause the battery power indicator to temporarily show a reading that is actually
higher than the battery level. The correct battery power indicator should appear after
a few minutes.
• If you use the light or alarms a number of times during a short period, a RECOVER
indicator ( )appears on the display and the following operations become
disabled until battery power recovers.
Backlight
Alarm and hourly time signal
Coordination between digital and analog timekeeping
Time calibration signal reception
After some time, battery power will recover and the RECOVER indicator will
disappear, indicating that the above functions are enabled again.
Charging Guide
After a full charge, timekeeping remains enabled for up to about six months, while the
watch is used under the conditions described below.
Operating Conditions
•
Watch is not exposed to light
•
1 backlight operation (1.5 seconds) per day
•
10 seconds of alarm operation per day
•
2 signal receive operations per day
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
5 minutes
24 minutes
48 minutes
8 hours
Charge Times
Exposing the watch to light for the periods shown below each day restores the power
used by the above operating conditions.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
• Stable operation is promoted by frequent charging.
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
Level 4 Level 3 Level 2 Level 1
54 minutes
3 hours
5 hours
41 hours
14 hours
71 hours
– – – – –
– – – – –
3 hours
14 hours
– – – – –
– – – – –
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.
Auto Return Features
• If you leave the watch in any mode (except for the Stopwatch Mode) for two or three
minutes without performing any operation, it automatically changes to the
Timekeeping Mode.
• If you leave a screen with flashing digits or a cursor on the display for two or three
minutes without performing any operation, the watch automatically saves anything
you have input up to that point and exits the setting screen.
Data and Setting Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Initial Screens
The following shows what appears on the display first in each mode.
Mode
Alarm
Day Counter
Telememo
Screen
Data you were last viewing.
Target Date/Text screen with data you were last viewing.
Memory Number/Name screen with data you were last
viewing.
Time Calibration Signal Reception Precautions
• This watch is able to receive the time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt). Signal reception is
possible within the area represented by a circle with a
radius of about 1,000 kilometers.
At distances further than about 500 kilometers, the
signal may become weak and reception may be
impossible under certain conditions.
• Even when the watch is within the reception range,
signal reception is impossible if the signal is blocked by
mountains or other geological formations between the
watch and signal source.
• Signal reception may be poor in the shaded area on the
map, even though it is within 1,000 kilometers of the
signal transmitter.
• Signal reception is affected by weather, atmospheric
conditions, and seasonal changes.
• The time calibration signal is bounced off the
ionosphere. Because of this, such factors as changes in
the reflectivity of the ionosphere, as well as movement
of the ionosphere to higher altitudes due to seasonal
atmospheric changes or the time of day may change the
reception range of the signal and make reception
temporarily impossible.
Frankfurt