The committees only set reasonable test levels, and can not cover all
potential situations. If you meet the specified immunity levels there is a
reasonable assurance that the product will work in most situations (but not
all).
To design all products to work in all environments would not be economically
practical. (i.e. most products will never be located with ½ mile of an
airport radar, or a ULF marine radio station). The manufacturer must
consider the need to design beyond what the average product will be exposed
to, and in unusual situations correct a field problem for the customer.
John Mowbray
-----Original Message-----
From: [email protected] [SMTP:[email protected]]
Sent: Thursday, May 04, 2000 11:07 AM
To: "emc-pstc (emc-pstc"@ieee.org
Subject: Re: Re- Cost of compliance
===========Snip
The commitees that wrote the standards took great pains to try to
consider all of the "what if" situations regarding the EMC and
safety
of products.
=============Snip
If the committees have included safety in their considerations -
then
they had better make their names available. That way I can sue them
if
my product has an EMC problem that relates to an injury or death.
Hands up those of you that truly believe that the maximum field
strength that a domestic product is exposed to is 3V/m?
If YOUR product has a safety issue at 4V/m and the EMC spec is 3V/m
is
the product safe?
In my book, if the product has a safety issue at any forseeable
field
strength - then it has a problem that need fixing.
Safety is the responsibility of the manufacturer - not a standards
committee - any generally applicable standards that are written are
a
guide, not an absolute.
(will this stir the discussion or ......)
Regards
Tim
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