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dipl.ing. J. Jordi, EMV-Technik Solothurn
Regulation EN55011:1998+A1:1999+A2:2002
Industrial. Scientific and medical (ISM) radio frequency
equipment.
Limits and methods of measurement
The amendment A2 came into force the August 1 st, 2002.
By July 1st, 2005 the regulation EN 55011:1998 only is legally
valid, when therequirements of amendment A2:2002 are complied
with.
The list beneath will show you the most important reforms and
change of regulationEN55011:98. These are contained in the
amendment A2:02
The limits (peak / average) of table 2a refer to the spectrum of
conductiveinterference voltage, measured on the 3x400Vac mains
lines of equipments class Agroup 2. (150kHz < f < 30MHz).
These limits and the method of measurement haveno change with
regard to the regulation EN55011:98
The limit of table 5b refer to EDM and arc welding machines.
This limit andthe method of measurement have changed and are
published in theamendment A2:2002
EN55011:98+A1:99+A2:02
ChapterNew aspects of amendment A2:2002 compared with
regulation EN 55011:1998
4Organization of ISM-
equipements
The manufacturer of ISM-equipments has to advise theuser about
the specific characteristics of equipment class A
group 2, by installing of a label or by a reference to the
operating manual.
see 4.1 and 4.2
4.1 Separation in groupsISM-equipment of the group 2 produce
intentional HF-
energy for metal handling purposes.
4.2 Subdivision into classes
Equipments of class A must respect the limit A. Theseequipments
may neither be installed nor applied in
domestic areas.
The operating manual refers to the potential emission ofRFI by
equipments class A group 2.
5.1.2.1
Continuous RFI emissionin the range of
frequencies
150kHz
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dipl.ing. J. Jordi, EMV-Technik Solothurn
Table 2a Limits of RFI emission (ISM-equipment class A group
2)
Measurement on the 3x400Vac mains lines by use of the LISN 50 or
probe 1500
Table 5b Limit of EM-radiation, emitted by EDM (ISM-equipment
class A) New version
Distance between DUT and antenna: D = 10m
