I read in !emc-pstc that Scott Douglas <[email protected]> wrote (in <[email protected]>) about 'Professional Equipment' on Sat, 24 Apr 2004: >I am curious to know what the term "Professional Equipment" is when applied to >certain EMC standards. Specifically, there is a standard, EN 55103-2 with a >title of : > >ELECTROMAGNETIC COMPATIBILITY. PRODUCT FAMILY STANDARD FOR AUDIO, VIDEO, AUDIO- >VISUAL AND ENTERTAINMENT LIGHTING CONTROL APPARATUS FOR PROFESSIONAL USE. >IMMUNITY > >Then there is a similar standard, EN 55020 with a title of: > >SOUND AND TELEVISION BROADCAST RECEIVERS AND ASSOCIATED EQUIPMENT - IMMUNITY >CHARACTERISTICS - LIMITS AND METHODS OF MEASUREMENT > >What I want to know is where does the term "Professional Equipment" come from, >who defines it, and how is it applied?
It's defined in IEC/EN61000-3-2, and in EN55103-1 and-2 and some other standards: Apparatus for use in trades, professions or industries and which is not intended for sale to the general public. In some standards there is an addition that the designation shall be specified by the manufacturer, i.e. the manufacturer has to describe the equipment as 'professional'. It was defined by the manufacturers of such equipment, with the agreement of manufacturers of other equipment, and other interests. > >Let's say I make a very high end product, too expensive for the average >consumer, maybe installed by a trained installer, has high power consumption >requirements. How high? If it's over 3680 W (230 V 16 A), that MIGHT make a difference. >It may end up in a home, probably as in a "home theater" or "sound >studio", but again not in the average consumer's residence. Can I arbitrarily >call this professional equipment, maybe because of the price tag or power >consumption? What about if I recommend dedicated power circuits be provided for >this equipment? Does that help? Not really, if it's electronic entertainment equipment. For example, electronic musical instruments are not 'professional' because they are sold to the general public, even though the more costly ones are sold only to a very small market. Actually, EN 55103 may not be of any help to you in searching for less stringent EMC requirements. You should look at what the standard (both parts) requires for environment E1. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
