Alan,
Level 1: (1V/M) Low-level electromagnetic radiation environment.
Levels typical of local radio/television stations located at more than 1
km, and transmitters/receivers of low power.
Level 2: (3V/M) Moderate electromagnetic radiation environment. Low
power portable transceivers (typically less than 1 W rating) are in use,
but with restrictions on use in close proximity to the equipment. A
typical commercial environment.
Level 3: (10V/M) Severe electromagnetic radiation environment. Portable
transceivers (2 W rating or more) are in use relatively close to the
equipment but not less than 1m. High power broadcast transmitters are in
close proximity to the equipment and ISM equipment may be located close by.
A typical industrial environment.
Level x: (Special) Level x is an open level which might be negotiated and
specified in the product standard or equipment specification.
Regards
Joe Martin
Applied Biosystems
[email protected]
Sent by: To:
[email protected]
owner-emc-pstc@majordom cc:
o.ieee.org Subject: Immunity
severity levels
09/18/2002 10:14 AM
Please respond to
alan.hudson
With regard to radiated emission immunity and EN61000-4-3 (or IEC 801-3)
I believe there are different field strengths used, depending on the
environment in which the apparatus being tested is to be used.
I believe equipment to be used in a well-protected environment may be
tested at a lower immunity level than equipment to be used in an
unprotected environment.
I've ordered a copy of 61000-4-3, but while I'm waiting I'd like to know
ASAP:
1) What are the definitions of the levels?
2) What field strengths are used for the various levels? (I think level
2 is 3V/m and level 3 is 10V/m)
Regards,
Alan
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