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.
David Heald <[email protected]> wrote: All, I need to know if there are any significant differences in the test levels specified in EN55014 and EN55022/55024. Access to my standards service is temporarily down so I need some help... I usually deal in the ITE realm, but just got a question from a customer who wants to integrate one of our ITE modules into an appliance as an information acquisition device that would then determine some settings on the appliance. We usually test these modules to (among other things) EN55022 & EN55024, but the customer is interested in EN55014. Are the tests & levels contained within EN55014 substantially different from those in 55022 or 55024 - i.e. are there any gotcha's that I need to be aware of? Note we qualified this module on a test board and tested to the next level higher than would be required by EN55024 (i.e. 10V/m RFI, 8/15kV ESD, etc). Thanks in advance for any advice... -Dave Heald - ---------------------------------------------------------------- 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 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 ______________________________________________________________________
