Geoff..................I agree totally.
Bob Heller
3M Company
====================================================================
"Geoff Lister" <[email protected]> on 06/25/99 12:13:58 PM
Please respond to "Geoff Lister" <[email protected]>
To: [email protected]
cc: (bcc: Robert E. Heller/US-Corporate/3M/US)
Subject: Re(2): EN 55024 Question
> From: [email protected] (Patrick Lawler)
> To: [email protected]
> Subject: Re: EN 55024 Question
> Date: Thu, 24 Jun 1999 17:02:22 GMT
> Reply-to: [email protected] (Patrick Lawler)
>
>
> On Wed, 23 Jun 1999 11:54:25 +0000, Geoff Lister
> <[email protected]> wrote:
>
> <snip>
>
> >My interpretation of the above, and it is only my opinion - please
> >feel free to differ, is that for ITE with its related sub-categories,
> >EN55024 supersedes both EN50082-1 and -2. This would indeed imply a
> >relaxation on applied limits for these classes of equipment used in
> >heavy industrial environments.
> >
> >Is this what the experts at CENELEC wanted?
> >
> <snip>
>
> What I noticed is that this trades an application-specific requirement
> (Residential, Commercial, and Light Industry) for a device-specific
requirement
> (ITE equipment).
> If I was in a factory environment, I would like all the equipment around
me to
> be EMC compatible, without regard as to the device type. It would be sad
to
> read a news story about an accident in a factory due to regulation
confusion
> (the component was tested as an ITE item, but it was controlling an
overhead
> crane).
>
> What are the problems or issues addressed by EN55024 that were not
covered by
> EN50082-1?
> --
> Patrick Lawler
> [email protected]
Patrick,
EN55024 contains specific performance criteria, for the different
forms of equipment, whilst being subjected to interference.
For telecomms terminal equipment, the acceptable acoustic sound
pressure levels or their digital equivalents are defined for
different frequency bands in the RF immunity test.
For data processing equipment, there are criteria for "Read, write
and storage of data", "Data display" particularly the effects of
mains magnetic fields on the monitor, "Data input" keyboard, mouse,
scanner etc.,"Data printing", and finally "Data processing".
The section for local area networks concentrates on error rates and
recovery.
The section on printers mentions change in output mode font or dot
pitch, and unintended line and page feeds.
The section on copying machines is similar to that for printers but
adds errors in billing, unintended operation of safety interlocks and
false indications.
Automatic teller machines and point of sale terminals must not,
amongst many other things, inappropriately dispense money or
receipts.
As I see it, there is nothing stopping a manufacturer performing the
tests to EN55024 limits for the CE mark, and then doing further tests
to EN50082-2 limits or higher, to show "due diligence" and to
help sales, where equipment is expected to operate in an
electromagnetically harsh environment.
Regards,
Geoff Lister
*Geoff Lister email: [email protected]
*Motion Media Technology Ltd., Horton Hall, Horton, Bristol, BS37 6QN, UK.
*POTS : +44-(0)1454-313444 or +44-(0)1454-338561 (direct)
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* The Videophone Company - Seeing is believing
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