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Operation Guide 2730
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 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 Indicator
Normal operation enabled.
Normal operation enabled.
Signal reception, tones (alarms,
hourly time signal) display illumination,
and digital display disabled.
All functions, including digital
timekeeping, disabled.
Level 1
Level 2
Level 3
Level 4
• Exposing the watch to direct sunlight or other strong light may
cause the battery level indicator to momentarily indicate a level
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.
• Alarms and the hourly time signal cannot be turned on, and signal
reception is disabled while the battery is at Level 3.
• Signal reception will become enabled again when the battery is
recharged up to Level 2.
• Even after the battery drops to Level 4, watch operation will
resume as soon as charging starts. However, you should wait until
the battery reaches Level 2 before setting the time and date.
❚
Start charging at Level 3!
If the Level 3 indicator starts to flash, it means that battery power
is very low. Be sure to expose the watch to light for recharging as
soon as possible after the Level 3 indicator starts to flash.
❚
Recovering Indicator
If you use the light or alarms a number of times during a short
period, the Recovering indicator may appear on the display to
indicate that the following operations are disabled in order to allow
battery power to recover.
• Display illumination
• Alarm and hourly time signal
• Analog timekeeping
• Time calibration signal reception
Normal operation will return after
the battery recovers.
Power Supply
An LED light is used to illuminate the display for easy reading in
the dark. An auto light switch automatically illuminates the display
when you angle the watch towards your face for reading.
Illuminating the Display Manually
In any mode, press the
BB
BB
B
button to illuminate the
display for about 1.5 seconds.
• The display does not illuminate if
a setting screen (one with a
flashing setting) is on the display.
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.
Illuminating the Display with the
Auto Light Switch
The auto light switch automatically illuminates the display for
about 1.5 seconds whenever you angle the watch towards
your face for reading, but only when it is dark.
• The auto light switch does not illuminate the display when
surrounding light is bright.
The auto light switch illuminates the display in all modes.
Turning the Auto Light Switch On and Off
In the Timekeeping Mode, hold down the B 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
❚
Positioning Your Arm Correctly
Auto Light Precautions
• Frequent use of the auto light can run down the battery.
• The display may not illuminate immediately when you angle the
watch towards your face. This does not indicate malfunction.
• The display remains lit for about 1.5 seconds only, even if you
leave the watch angled towards your face.
• The display 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 display 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 display illumination, try lowering your
arm down to your side and then raise it to your face for reading.
11
11
1
22
22
2
More
than 40
degrees
Display Illumination
❚
Charging Precautions
Avoid charging the watch in the following locations, and anywhere
else 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
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.
❚
Charging 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.
❚
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.)
• Display Illumination: 1.5
seconds
• Alarms: 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
Charging Time
Level 4 \ Level 3 \ Level 2 \ Level 1
1 hr.
4 hr.13 hr.
3 hr.
5 hr.
45 hr.
18 hr.66 hr.
Environment
(Luminosity)
Outdoor sunlight
(50,000 lux)
Indoor sunlight
(10,000 lux)
Outdoor overcast
(5,000 lux)
Fluorescent indoor
lighting (500 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”.
Environment
(Luminosity)
Outdoor sunlight
(50,000 lux)
Indoor sunlight
(10,000 lux)
Outdoor overcast
(5,000 lux)
Fluorescent indoor
lighting (500 lux)
5 min.
24 min.
48 min.
8 hr.
Charging
Time
• 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 level 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 the B button or if an alarm operation starts while the
display is illuminated, illumination will turn off.
Recovering
Indicator