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2. For Proper Power Generation
[Power Generation Mechanism]
When this watch is worn on the wrist, body
heat from contact with the skin will heat
up the back cover of the watch. This heat
will be released into the air from the sur-
face of the watch, and the temperature dif-
ference between the back cover and the
watch surface will drive a thermoelectric
generation device that generates electric
energy. Power generation performance
varies considerably depending on air temperature, individual differences in body
temperature and the manner in which the watch is worn. The standard usage
environment of this watch is defined as wearing the watch so that the back over
is in direct contact with the wrist at an air temperature of about 25˚C (77˚F) and
body temperature (surface temperature on the wrist) of 32˚C (89.6˚F).
Power generation performance increases as the temperature difference between
the back over and watch surface becomes larger, and decreases as the tem-
perature difference becomes smaller. Power is no longer generated when the
surface temperature of the watch and the temperature of the back cover are
equal or when the surface temperature exceeds that of the back cover. The watch
is unable to generate sufficient power if the surface of the watch is covered with
clothing or other objects. It is recommended to wear the watch so as to release
the heat of the watch surface as much as possible.
[Distinguishing Between Power Generating and Non-Power Generating
Modes]
When power generation has stopped as a result of removing the watch from the
wrist, the second hand moves at 10-second intervals indicating that power is not
being generated. When power generation is resumed by putting the watch on
your wrist or warming the back cover with your fingers, the second hand returns
to 1-second interval movement.
Eco-Dorive Thermo
3


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