Filter
Top Products
Operation Guide 3731
2
The power supply of this watch uses a solar cell to generate
electrical power, which is stored by a rechargeable battery. Using
or storing the watch where it is not regularly exposed to light, or
allowing it to be blocked from light by your sleeve for long periods
as you are wearing it can cause the power of the rechargeable
battery to run down. To ensure stable operation, be sure to allow
the watch to be exposed to light as much as possible when you
are wearing or storing it.
Note that all data in memory and all settings are cleared
whenever you allow the level of the rechargeable battery
to drop to Level 4.
❚
Battery Level Indicator
Level 2
Level 3
Level 4
Level 1
Normal operation
enabled.
Digital display, illumination,
alarms, tones (alarms,
hourly time signal), signal
reception, digital-analog
synchronization disabled.
All functions, including
timekeeping, disabled.
Normal operation
enabled.
• In the Stopwatch Mode, the battery level indicator dial functions
as the elapsed time minute hand.
• Exposing the watch to direct sunlight or other strong light may
cause the battery level indicator to indicate a level momentarily
that is higher than the actual battery level. Because of this, you
should wait for a short while after charging to check the battery
level indicator.
• Signal reception resumes when the battery is recharged to Level
2.
• Even after the battery drops to Level 4, you will be able to resume
normal operation by charging the battery. After the digital display
appears, configure time and date settings.
❚
Start charging at Level 3!
Battery Level 3 indicates that remaining battery power is very low.
Be sure to expose the watch to light for recharging as soon as
possible after Level 3 is indicated.
❚
Flashing Recover Indicator
If you use the light or alarm a number of times during a short
period, a recover (R) indicator flashes on the display and the
following operations become disabled as battery power recovers.
• Display illumination,
• Alarm and hourly time signal
• Time calibration signal reception
• Analog-digital synchronization
Normal operation will return after the
battery recovers.
Recover Indicator
❚
Charging Guide
Starting from a full charge, the watch
should be able to continue operating
for about five months without further
charging under the conditions
described below.
Daily Use (All time values are
approximate.)
• Illumination: 1.5 seconds
• Alarm: 10 seconds
• Signal reception: 5 times
Making sure the watch is regularly
exposed to light ensures stable
operation.
• Charge Times Required to Advance to a Higher Level
Approximate Exposure Time
Level 4 \ Level 3 \ Level 2 \ Level 1
– – – – – –
– – – – – –
1 hours
4 hours14 hours
3 hours
5 hours
49 hours
20 hours71 hours
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Daylight Through a Window on
an Overcast Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
Sunlight Through a
Window (10,000 lux)
• Note that the above charging times are for reference only. Actual
charging time depends on a variety of environmental factors.
Required Daily Charging Time
•
The following is the daily
amount of charging required
each day to support the
operations under “Daily Use”.
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
5 minutes
24 minutes
48 minutes
8 hours
Sunlight Through
a Window
(10,000 lux)
Daylight Through a
Window on an Overcast
Day (5,000 lux)
Indoor
Fluorescent
Lighting (500 lux)
Approximate
Exposure
Time
Power Supply
An LED light is used to illuminate the face of the watch for easy
reading in the dark. An auto light switch automatically illuminates
the face when you angle the watch towards your eyes for reading.
❚
To illuminate the face manually
Press the
DD
DD
D button in any
mode (as long as a setting
screen is not displayed) to
illuminate the face of the
watch.
• Pressing the D button illuminates the face regardless of whether
the auto light switch is on or off.
• You can use the procedure under “To specify the illumination
duration” to configure the illumination duration as approximately
1.5 seconds or 2 seconds.
You may hear a faint rattling sound when you move the watch
around. This sound is caused by the movement of a metal
bulb that controls operation of the auto light switch, and does
not indicate malfunction.
❚
To illuminate the face with the auto light
switch
The auto light switch automatically illuminates the face
whenever you angle the watch towards your eyes for reading,
but only when it is dark.
• The auto light switch does not illuminate the face when
surrounding light is bright.
You can use the procedure under “To specify the illumination
duration” to configure the illumination duration as
approximately 1.5 seconds or 2 seconds.
❚
To turn the auto light switch on and off
While any screen (besides a flashing setting screen) is on the
display, hold down the D button for about two seconds to toggle
the auto light switch on (auto light switch on indicator displayed)
and off (no indicator displayed).
Auto Light Switch
On Indicator
(Light)
❚
Positioning Your Arm Correctly
1
2
With the watch on
your wrist, position it
level with the ground.
Rotate your arm so the watch
is angled at about 40 degrees,
so you can read its face.
At least
40
degrees
• You should be wearing the watch on the outside of your wrist
when using the auto light switch.
• Make sure that the left (9 o’clock) and
right (3 o’clock) sides of the watch are
within ±15 degrees of being parallel
with the ground. The auto light switch
may not operate properly if the angle is
greater.
Important!
• The light may be difficult to see if you turn it on under bright
sunlight.
• If you press any button or if an alarm operation starts while the
face is illuminated, illumination will turn off.
Auto Light Precautions
• Frequent use of the auto light can run down the battery.
• The auto light switch may cause the face to illuminate when your
sleeve covers the face of the watch.
• The face may not illuminate immediately when you angle the
watch towards your face. This does not indicate malfunction.
• The face remains illuminated for the currently set duration (1.5 or
2 seconds) only, even if you leave the watch angled towards your
face.
• The face may illuminate unintentionally when you wear the watch
on the inside of your wrist, when you shake your arm, or when
you raise your arm. Be sure to turn off the auto light switch
whenever you do not need face illumination.
• Keep the auto light switch turned off whenever you are wearing
the watch on the inside of your wrist.
• Electro-static charge and magnetism can interfere with auto light
operation and even make operation impossible. If this happens
lower your arm to the starting position and then raise it again. If
you still have trouble with illumination, try lowering your arm down
to your side and then raise it to your face for reading.
Face Illumination
❚
Charging Precautions
Avoid charging the watch in the following locations, and anywhere
else where the watch may become very hot.
• On the dashboard of an automobile parked in the sun
• Very close to an incandescent light source or other sources of
heat
• In a location exposed to direct sunlight for long periods or a
location that is very hot
Note that the display panel may become black under very high
temperatures. This is temporary, and the display will appear
normal again at lower temperatures.
Depending on the light source you are using, the
case of the watch may become quite hot during
charging. Take care to guard against burn injury
after charging.
❚
To charge the battery
Point the solar panel (face) of the watch at a light source.
• Remember that even a partial blockage of the solar cell reduces
charging efficiency.
Example: Positioning the watch
Solar Cell
• The illustration shows the resin band model.