Tim Williams B.Sc.

Curriculum Vitae

Professional experience

Feb 90 - Present: Proprietor and Consultant, Elmac Services, Wareham

Electronic product design and test consultancy specializing in electromagnetic compatibility (EMC), including training. Work has included:

• EMC design, testing and management training; public courses at ERA Technology, TUV PS and under Elmac Services, EMCTLA and Chase EMC bylines, in-house courses for various companies including Nokia Mobile Phones, Sony, GEC Marconi, Roke Manor Research, Eurotherm, IMI, Lucas & Bowthorpe groups, Hong Kong Productivity Council, Sun Microsystems, SAAB Microwave
• consultancy for numerous companies on the management, legislative and commercial aspects of implementing compliance with the EMC Directive
• EMC test and control plan definition, and design consultancy on satellite, marine display, vehicle display and other equipment
• consultancy and/or remedial design work on EMC design aspects of a wide variety of electronic products from all industry sectors
• expert witness for the defendant in the case of Tunstall Group plc vs Anchor Line plc, heard at the High Court in June-July 1994, referring to the susceptibility to electromagnetic disturbance of a fire alarm system
• EM field survey work including RAF Fylingdales EW radar station and various cellphone installations
• provision of competent body consultancy services to Schaffner EMC Ltd, who were appointed by the Secretary of State for Trade and Industry as a Competent Body under the original EMC Directive
• technical assessor of accredited EMC test labs for UKAS and SWEDAC
• author (with Keith Armstrong) of EMC Awareness web pages for the Radiocommunications Agency
• involvement with DTI-NMSPU research projects on uncertainties of EMC testing

Sept 86 - Feb 90: Group Leader, R & D, Rosemount Ltd., Bognor Regis

Mar 83 - Aug 86: Senior Development Engineer, Servomex Ltd., Crowborough

Apr 82 - Mar 83: Chief design engineer, XOR Electronics, Edenbridge

Oct 80 - Apr 82: Product design engineer, Electrosonic Ltd., Swanley

Areas of expertise

EMC design of electronic and electrical equipment: to meet limits on conducted and radiated RF emissions, mains harmonic and flicker emissions; to ensure minimum conducted and radiated RF susceptibility, transient and ESD susceptibility

EMC testing: assessment of EMC test laboratories for accreditation agencies, and advice on achieving accreditation; control and scheduling of testing and test plan definition for EMC tests; field strength surveys for electromagnetic field hazard monitoring; interpretation of relevant customer and international EMC test standards

Other areas: General analogue and digital hardware and software design; surface mount design and production, hazardous area certification, infra-red and radiological analysis techniques. Considerable experience of design for production, both high and low volume, and testability. Commercial and managerial experience, including industrial relations, court appearances and marketing.

Other activities

Author of "The Circuit Designer's Companion", second edition, Newnes 2005; also of "EMC for Product Designers", Newnes 2007. This latter book is now into its fourth edition and covers the application, standards and test methods for the EMC Directive, as well as design principles and techniques for EMC compliance purposes. It has become established as the reference book on EMC in electronics design departments and is translated into several languages.

Authored and presented papers on EMC design, test and management issues at various conferences, including Audio Engineering Society, ERA Technology, Euro EMC, Institution of Electrical Engineers (colloquia on "EMC in High Integrity Digital Systems" and "Electromagnetic Hazards to Active Components" as well as EMC conferences), Society of Environmental Engineers, IEEE-EMCS, BEAMA, various EMC Clubs and universities

EMC conferences and seminars attended:

• EMCUK 2004 onwards, Newbury
• ERA EMC-88 to 94
• ERA conferences on Aircraft and High Intensity Radiated Fields, 1990 and 1992
• Euro-EMC-90 to 93
• IEE EMC-90, 92, 97
• Zurich International EMC-93, EMC-95, EMC-97, EMC-01, EMC-03, EMC-07
• EMC Roma Sept 94, 96, EMC-Europe 2000, 2002, 2006
• IEEE EMC Denver 98
• EC Workshop on the EMC Directive, Brussels, October 93

Elmac Services, Wareham, Dorset - Phone 01929 558279