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CISPR/TC77 Joint Task Force Activity Update ACEC meeting in Paris, June 2006

CISPR/TC77 Joint Task Force Activity Update ACEC meeting in Paris, June 2006. Prepared by Donald N. Heirman Chairman CISPR Subcommittee A. Topics Covered. Joint task groups with TC 77 (SC 77B) Publication of JTF results Summary. CISPR / TC 77 Projects 1.

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CISPR/TC77 Joint Task Force Activity Update ACEC meeting in Paris, June 2006

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  1. CISPR/TC77 Joint Task Force Activity UpdateACEC meeting in Paris, June 2006 Prepared by Donald N. Heirman Chairman CISPR Subcommittee A

  2. Topics Covered • Joint task groups with TC 77 (SC 77B) • Publication of JTF results • Summary

  3. CISPR / TC 77 Projects 1 • Joint task force (JTF) experts from both committees participate (CISPR SC A and SC 77B) • New emission and immunity measurement standards • Used for product compliance • Extending test capability for new product technology

  4. CISPR / TC 77 Projects 2 • TEM Waveguides (Published as 61000-4-20) • Used for emission and immunity testing • Presently applicable for “small EUTs” • An EUT is defined as a small EUT if the largest dimension of the case is smaller than one wavelength at the highest test frequency (for example, at 1 GHz λ = 300 mm), and if no cables are connected to the EUT. All other EUTs are defined as large EUTs.

  5. CISPR / TC 77 Projects 3 Example of TEM test setup

  6. CISPR / TC 77 Projects 4 • TEM Waveguides (Published as 61000-4-20) • Recent meetings: • University of York, February 2006 • IEEE EMC Symposium, Portland, Aug. 2006 • Siemens, Erlangen, Feb. 2007 • IEEE EMC Symposium, Honolulu, 8 Jul. 2007 • Next: Nottingham, 29/30 Nov. 2007 • Conveners: Andy Marvin (U of York) and Angela Nothofer (U of Nottingham)

  7. CISPR / TC 77 Projects 5 • TEM Waveguides (Published as 61000-4-20) • Technical Matters: • Editorial changes undertaken including minor technical issues resolved, Edition 1.1 recently published • Work proceeding according to revised timetable

  8. CISPR / TC 77 Projects 6 • Reverberation Chamber testing (Published as 61000-4-21) • Used for emission and immunity testing • Accommodates large products • Measures emission power (which can be converted into field strength limits via an algorithm) • CIS/A/497/DC (2004) sent to NCs asking inputs on future maintenance activities including addressing commercial as well as military application • Results in CIS/A/540/INF varied • Questionnaire issued on need for maintenance (77B/505/Q and CIS/A/656/Q—both in 2006)

  9. CISPR / TC 77 Projects 7 Example of reverberation test setup

  10. CISPR / JTF Projects 8 • Testing in fully absorber-lined room (FAR) • First step applies to radiated emission measurements • Published in Pub 16-2-3, Clause 7.2.9.2 • New work item proposal (CIS/A/505/NP) presented to address emissions and immunity for FAR in a single document with aim to reduce and simplify procedures currently in multiple documents (CIS/A/537/RVN) • To be published as 61000-4-22 • Draft CD to be finalized at 7-10 June 2006 JTF meeting in Erlangen, Germany with distribution to National Committees for comment in Sept.

  11. CISPR / JTF Projects 9 Example of FAR test setup

  12. CISPR / JTF Projects 10 • Uniform Test Arrangements • Radiated emissions (30 MHz to 1 GHz) and immunity (80 MHz to 1 GHz) test method with common test set-up in semi-anechoic chamber • Work progressing on scope and planning • CIS/A/590/CDV circulated 6 May ’05 with comments and vote in CIS/A/630/RVC • CDV approved (89% P-members in favour) • CIS/A/657/FDIS circulated 31st March ’06 with closing date for vote on 2nd June ‘06

  13. CISPR / JTF Projects 11 Example of uniform test arrangements

  14. Other JTF related Information 12 • CIS/A/486/INF identifies JTF conveners and co-conveners as well as membership in present four task groups • Membership in CIS/A/561/INF • CIS/A/481/INF provides JTF guidelines to be used by CISPR/A and SC77B and conveners of JTFs for publishing documents within the established timelines of the IEC • Additions planned based on practical work needs

  15. Summary • Providing new basic standards to CISPR (and other) product committees to select in determining conformity to limits • Providing additional test methods to use by TC77 in immunity work • Projects beyond first two publications well underway • CISPR/TC77 management continuously monitoring activity to ensure that progress continues and difficulties resolved

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