Sirona Dental USB-Box Instrucciones De Uso E Instalación página 51

Sirona Dental Systems GmbH
1 nanosecond = 1 / 1,000,000,000 second =
1 billionth of a second
59 15 702 D 3334
D 3334.201.02.13.02
1 Warning and safety information
The compensating currents resulting from these dis-
charges have a magnitude of 10 amperes. They are not
hazardous for humans because they last for only several
nanoseconds.
Voltage differences exceeding 30,000 volts per centi-
menter may lead to a charge compensation (electro-
static discharge, lightning, arc-over).
Integrated circuits (logical circuits and microprocessors)
are used in order to enable a wide variety of functions in
a dental/X-ray/CEREC system. The circuits must be
miniaturized to a very high degree in order to include as
many functions as possible on these chips. This leads to
layer thicknesses with a magnitude of several ten thou-
sandths of a millimeter.
It is obvious that integrated circuits which are connected
to plugs leading outside of the unit via cables are sensi-
tive to electrostatic discharge. Even voltages which are
imperceptible to the user can cause breakdown of the
layers, thus leading to a discharge current which melts
the chip in the affected areas. Damage to individual inte-
grated circuits may cause malfunction or failure of the
system.
To prevent this from happening, the ESD warning label
next to the plug warns of this hazard.
9