I read in !emc-pstc that [email protected] wrote (in <f2.30386a47.2c861 [email protected]>) about 'Testing modes' on Tue, 2 Sep 2003:
> My question is, what should be the test mode. The time when the > instrement is waiting for use, or the few seconds when testing? All modes. >By > the nature of the operation, the device can't meet the radiaated > emissions limits when stressing motors because of discharges within > the windings. So, is there a "get-out" clause anywhere? Within the windings of the tester or of the motors? If the latter, you can assume that the product is tested with a 'perfect' motor that doesn't have discharges. Then you put the motors under test in a screened enclosure, which helps with the safety issues of the HV testing anyway. Another approach might be to regard the product as one that uses r.f. energy and see if it meets the relevant CISPR 11/EN 55011 limits. -- 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
