I maintain that all equipment and apparatus can be classified into one of a few broad categories and that the terms "functionality" and "performance" are distinquishable and their definition is self-evident.
I suggest each Performance Criterion might be re-written as follows: "Criterion A - No loss of function or performance allowed during or after the test. The product must operate as intended and meet its performance specifications. Criterion B - No loss of function during or after the test is allowed. No loss of stored data or operating state is allowed. Degradation of performance during the test is allowed provided it is disclosed in the user documentation, product description, specifications or operating instructions. Criterion C - Loss of performance or function is allowed provided it is recoverable at the end of the test. The recovery may be automatic or manual in nature. No damage to the product is allowed as a result of any EMC immunity test described or referenced in this standard." Ralph McDiarmid, AScT Compliance Engineering Group Xantrex Technology Inc. www.xantrex.com tel: (604) 422 2622 fax: (604) 420 1591 From: John Woodgate [mailto:[email protected]] Sent: April 25, 2003 11:26 PM To: [email protected] Subject: Re: Performance Criterion I read in !emc-pstc that Ralph McDiarmid <[email protected]> wrote (in <67C475A5ECE7D4118AEC0002B325CAB602D2F9E0@BCMAIL1>) about 'Performance Criterion' on Fri, 25 Apr 2003: >They might just as well say, "It is the manufacturer's responsibility for >defining an acceptable level of performance and functionality for the >equipment, both during and after the disturbance. This information must be >included in the technical manual or other user documentation which >accompanies the equipment". (no more Criteria A,B or C) Because of the diversity problem, which you still underestimate, that is exactly the solution adopted in EN 55103-2, except that the criteria are still included. This prevents abuse of the defining process, by, for example, requiring the effects of continuous disturbances to fall within Criterion A. In addition, the information has to be available BEFORE purchase: it's too late afterwards! It's acceptable for that standard, because the purchasers of the products have technical knowledge, allowing them to determine if the published degradations are acceptable for a given application. It wouldn't work for consumer products, hence EN 55020. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
