> 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) *ISDN : +44-(0)1454-338555 or +44-(0)1454-338554 (direct) *FAX : +44-(0)1454-313678 Home : +44-(0)1275-854025 *WWW : http://www.motionmedia.co.uk/ * The Videophone Company - Seeing is believing --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
