Conformity Magazine - August 2008 - (Page 31)

Summary To the test service industry and test equipment suppliers, the changes found in ISO/FDIS 10605:2008 will have little impact, and the test equipment used today for automotive ESD testing is suitable. The equipment supplier may be able to offer additional calibration targets and fixtures, but essentially the ESD generator and discharge networks remain unaltered from ISO 10605:2001 and IEC 61000-4-2 (most ESD test equipment is supplied with the 330Ω network, and the 2000Ω network has to be purchased separately). For test services, the most likely immediate impact will be that slightly more calibration might be required. The greatest impact occurs to the producer of ESAs, where the quantity of testing will be increased. The levels and/or severity of test will be the same or increased if you wish to use the 330Ω network, but a technical argument for only using the 2000Ω resistor is easily obtained (most of it can be copied from this article). The test cases and functional classification will be the same, although their reference names have changed, but the number of test impulses for air discharge is significantly increased. Hence, although products designed to meet this standard will probably remain as they are today, testing costs may increase by 50% to 100% due to the sheer volume of discharges, and the additional handling ESD test required prior to other EMC performance testing. Conclusion I would again strongly argue that the use of the 330Ω network is technically wrong for products intended for the automotive environment. This choice potentially calls into question the basis for many of the judgements made by the ISO committee that drafted this update. Apart from the improvements in calibration and clarification of the FPSC, most of the other changes appear to be minor adjustments. In hindsight, the changes as implemented are unlikely to make a significant difference to either product design or testing (other than the amount a producer will have to pay for the testing). In general, the updates to the calibration are worthwhile and should improve repeatability, but overall the updated ISO 10605 appears to offer few benefits, and those are clearly outweighed by the increased testing costs for producers. Martin O’Hara is the founder of the Automotive EMC Network (www.autoemc.net), and can be reached at news@autoemc.net. References • ISO/TR 10605: Road vehicles – electrical disturbances from electrostatic discharges (1994) • ISO 10605: Road vehicles – test methods for electrical disturbances from electrostatic discharges (2001), first edition • ISO/DIS 10605: Road vehicles – test methods for electrical disturbances from electrostatic discharges (2007), ISO/ TC22/SC3/WG3 N 1563 • SAE J1113-13: 1995-02, Electromagnetic Compatibility Measurement Procedure For Vehicle Components- Part 13 - Immunity to Electrostatic Discharge • IEC 61000-4-2: Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test (1995), incorporating amendments A1: 1998 and A2: 2001 • BMW - BMW Group Standard GS 95002: Electromagnetic Compatibility (EMC) Requirements and Tests (October 2001) • Daimler-Chrysler DC-11224 EMC Performance Requirements – Components (October 2006) FAST Link www.conformity.com/2040 AUGUSt 2008 Conformity 31 http://www.conformity.com/2040 http://www.autoemc.net http://www.pseinc.com http://www.pseinc.com

Table of Contents Feed for the Digital Edition of Conformity Magazine - August 2008

Conformity Magazine - August 2008 Contents Editor’s Note FCC Seeks Comment on Reauction of 700 MHz D Block Commission Cracks Down (Again!) on Junk Fax Marketer Canada Levies Fees for Public Safety Radio Spectrum FDA Issues Guidance on Medical Device Tracking Greenpeace Challenges Video Game Manufacturers The IEEE EMC Society: A Proud History of Accomplishments ESD Open Forum An Update on Changes to the Automotive ESD Standard, ISO 10605 Modeling of Radiated Electromagnetic Disturbances in Automotive Applications Design Issues in Automotive Radio Frequency Systems IEEE EMC Symposium IEEE 2008 Show Preview Exhibitors Buyer’s Guide Product News Most Eco-Friendly Companies Updated Standards List For the EU’s Pressure Equipment Directive Commission Issues Updated Standards List For Directive on Gas-Fired Appliances HHS Releases Fact Sheet on U.S. Imports from China Customs Agents Seize Holiday Lights IEEE PSES Symposium Set for October CPSC Actions in the News IEC Standards Update UL Standards Update Telcordia Standards Update From Our “You Can’t Make This Stuff Up” Department Looking Back: Items from Past Issues of Conformity Product Reviews Advertisers

Conformity Magazine - August 2008

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