| Electric
and electronic equipment is always transmitting electromagnetic
interference that can disturb other equipment or systems. These
disturbances can be slight, momentary functional disorders but
they can also lead to functional disability or even to destruction
of the equipment.
In 1989 the directive 89/336/EEC for regulations concerning electromagnetic
compatibility (EMC directive) was adopted to introduce protective
measures against this problem. Through this directive the safe
and reliable operation of electronic equipment is insured by protecting
it from interference from other equipment as well as defining
interference levels under which the equipment must still operate
reliably. As all other directives, this directive does not stipulate
specific limit values but defines the principal protection requirements,
i.e. the essential requirements.
According to article 10 of the EMC directive,
three conformity assessment procedures are specified: |