Keith Armstrong started Cherry Clough Consultants in 1990 to help manufacturers reduce costs, timescales and warranty costs whilst complying with the EMC Directive and other regulations. His credentials include: BSc(Hons)Elec.Eng. 1972 (Imperial College, London); Member IEE (now IET): 1977;UK Chartered Engineer: 1978; European Engineer (Group 1): 1988; Member IEEE EMC Society: 1997; Member IEEE Product Safety Engineering Society: 2003; Chair IET Working Group on “EMC and Functional Safety” UK representative on the IEC teams for: IEC 61000-1-2 (EMC & Functional Safety, MT15), and IEC 60601-1-2 (EMC for Medical Devices, MT23); President of the EMC Industries Association: 2008/9; Member of Technical Panel, IET Professional Network on; EMC Member of Technical Panel, IET PN on Functional Safety Member of EMC Test Labs Association. Keith has a great deal of experience with the EMC of control panels, systems and installations, of all types and sizes, and with Tim Williams wrote the textbook: “EMC for Systems and Installations” (Newnes, 2000, ISBN 0-7506-4167-3, www.bh.com/newnes, RS Components P/No. 377-6463).
I have lost count of the number of times I have been asked to fix an EMC problem, only to find that a shielding box has been designed or purchased to provide XdB up to fMAX. Or a filter has been designed or purchased with a similar specification, but to reduce cost the filter has been mounted on a printed circuit board (PCB) inside the box, with a cable from it entering or exiting the box through a plain connector.