Bob, You are right, that is why I said: "I believe that if your module passes 55022 class B limits, and also the next higher level in 55024, your module will probably not contribute to a failure in the end product." ;-) I never tested any "toys" so I am not familiar with that. Is that part of 55014 now (or then)? I do remember there was a section in 55014 covering internal vibrators, and what was to be used as the auxillary "load" for test purposes. :-O And, no, I never had the chance to test any of those. At the time I was performing tests to 55014, there was a separate standard for immunity, I believe it was 55104. Cheers, Bob Richards, NCT
[email protected] wrote: There is a "radiated" emissions test for toys and I would advise doing the test for all products. The radiated test for 55014-1 is a disturbance power test mush as you described but I would not come to the conclusion that passing EN 55022 Class B would be all right. Also EN 55014-1 covers emissions and EN 55014-2 covers immunity. Bob Heller 3M EMC Laboratory, 76-1-01 St. Paul, MN 55107-1208 Tel: 651- 778-6336 Fax: 651-778-6252 =============================================================== Bob Richards m> To Sent by: David Heald [email protected] ieee cc 02/09/2007 11:08 Subject AM Re: EN55014 & EN55022/24 test & limit similarities? David, It has been a few years since I tested anything to 55014, and I don't have access to 55014 now, so what I say may be dated. IIRC, Unless the product is a power tool, 55014 has similar conducted emissions limits. I believe the average limit is actually higher at 150kHz, but pretty much the same as class B 55022 limits. Power tools have higher limits. In 55014, there is no "radiated" emissions test. However there is a disturbance power test, which covers 30-300 MHz using an absorber clamp to measure the emissions on any cables exiting the product. This test is what some labs refer to as the "track test", since the absorber clamp has wheels, and is moved along some sort of track to maximize the emissions. There is a "click" test, or discontinuous disturbance test. This is an additional conducted disturbance test for very short duration spikes in the conducted emissions, due to switching transients that may exist in products with relays or contactors. It is basically a relaxation of the normal conducted QP limits for these transients. The amount of relaxation of the limit is based on the click frequency, the fewer clicks the more the limit is relaxed. Conducted immunity covers up to 230 MHz instead of 80 MHz. There is no radiated immunity. I believe EFT and surge tests are similar. I believe that if your module passes 55022 class B limits, and also the next higher level in 55024, your module will probably not contribute to a failure in the end product. I hope this helps. Bob Richards, NCT. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
