Dear all, I have observed that there are different interpretations about testing radiated immunity (for example with 10 V/m, up to 2 GHz) for alarm equipment. Applicable standards are for Europe EN 50130-4 and EN 50136.
The main difference in the interpretations is with regard to the functionality of the alarm equipment, especially when an (intruder) alarm is generated and the equipment is designed to transfer this information to an Alarm Receiving Center (e.g. By dialling a telephone number) and this should (?) work as well during conducted and or radiated immunity stress. Interpretations: 1. During the immunity stress testing, some malfunction can be accepted (depending upon equipment class), but afterwards it should work properly. It is not realistic to consider 2 phenomena (radiation stress 10 V/m at critical frequencies and an intruder alarm) at the same time. 2. It is essential that during these circumstances the equipment shall continue to work reliably and is capable to transfer the alarm message. Every intruder who knows the trick, can deal wit the situation with a portable radiator, something we should avoid. 3. Formally speaking: telecom equipment responsible for message transfer is not part of the alarm equipment and should be considered / tested separately. I would appreciate your comments on these interpretations. With kind regards Theo Hildering Consultant E-mail: theo.hilder...@planet.nl ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- 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 emc-p...@ieee.org 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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
