Casio 5002 Operation Manual

MA0811-EA

Before using the watch...

Expose the watch to light.
Your watch runs on electrical power generated from light, which is
stored by a chargeable battery. Long-term storage of the watch can
cause power to run low, so be sure to expose the watch to light for
some time before using it for the fi rst time. See "Solar Charging" for
more information.

Solar Charging

Your watch runs on electrical power generated from light, which is
stored by a chargeable battery.
To ensure stable operation, make sure that the watch is exposed to
light as much as possible.
• Whenever you are not wearing the watch on your wrist, position
it so the face (solar cell) is pointed in the direction of a source of
bright light. Leave the watch under fl uorescent lighting, near a
window, etc.
• When wearing the watch, try to keep your sleeve from blocking its
face, where the solar cell is located. Charging effi ciency is reduced
signifi cantly even if the face of the watch is covered only partially
by your sleeve.
Operation Guide 5002 (GMS)
Power Saving
Power Saving causes the watch to enter a sleep state automatically
and stop movement of the analog hands in order to save power
whenever the watch is left in the dark.
The watch will exit the sleep state if you expose it to light or perform
any button operation.
• Note that the watch also may enter the sleep state and stop if the
solar panel is blocked from light by your sleeve.
How the sleep state works
Sleep Level 1
Sleep Level 1 is triggered whenever the watch is left in the dark for
about one hour any time between the hours of 10 p.m. and 6 a.m.
• Second hand stopped
• The hour, minute, day, and day of the week hands continue to
operate normally.
• Auto Receive is disabled.
Sleep Level 2
Sleep Level 2 is triggered whenever the watch is left in the dark while
in Sleep Level 1 for six or seven days.
• The hour, minute, day, and day of the week hands stop at their
current positions.
• Auto Receive disabled
• Digital timekeeping functions continue to operate normally.
How the solar cell and battery work
While the watch is exposed to light...
While the watch is not exposed to light...
Your watch continues to operate even when it is not exposed to light.
Leaving the watch in the dark can run down its battery and cause
functions to become disabled.

Modes and Indicators

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
Depending on the light source you are using, the
case of the watch may become quite hot when
charging. Take care to guard against burn injury after
charging.
Dead Battery
The following conditions apply when
the battery is dead.
• Timekeeping stops.
• Auto receive and manual receive
are disabled.
• Second hand stops immediately at
12 o'clock.
• Hour and minute hands stop at 12
o'clock at midnight.
• Even if the battery level drops to
the point that timekeeping stops,
you still will be able to recharge
the battery and use the watch
again.
• After you recharge the battery
when it drops to a level where
timekeeping stops, the hands will
move automatically to the current
time setting.
• Try to keep the watch exposed to
light as much as possible during
normal use.
Charging Guide
Required Charging Time for One Day of Operation
• The following values assume six minutes of calibration signal
reception per day.
Making sure the watch is exposed to light ensures stable operation.
Approximate Charge Times Required to Advance to
a Higher Level
• Note that the above charging times are for reference only. Actual
charging time depends on a variety of environmental factors.
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