Craig Fanning, EMC Lab Manager |
Users of SAE EMC standards may have noticed that many of the
SAE J551 and SAE J1113 standards have been withdrawn over the past few years.
These withdrawn standards are no longer being revised and updated. As these
standards are withdrawn, the base standard of the series (SAE J551-1 or SAE
J1113-1) is updated to indicate that the particular SAE standard has been
withdrawn. The base SAE standard also directs the user to reference the
equivalent CISPR or ISO standard. Unfortunately this results in having to
purchase the more expensive international standard which replaced the SAE
standard.
So, why are the SAE EMC standards being withdrawn??? A few years
ago, SAE noticed that some of the SAE EMC standards were, for the most part, technically
identical to some equivalent CISPR and ISO (international) standards. This became a concern of SAE as they do not
want to get into copyright conflicts with the international standards bodies.
Therefore, the SAE EMC committee was given the directive to start withdrawing any
SAE standards which were technically identical to an international standard.
Many of the same experts involved in the SAE EMC committee in the United States are also involved with at the International Standards development level (CISPR and ISO standards). During meetings at the international level, the need to develop a standard to address a particular field issue may be discussed. If an SAE standard which addressed the issue already existed, then the international standards committee would use the SAE standard as the basis for development of a new CISPR or ISO standard. Although the process to publish the international standard would take several years, the two standards (SAE and International) would eventually become very similar.
What is the long term benefit of using international
standards over the SAE standards??? Although it may seem like a burden to
purchase a more expensive CISPR or ISO standard, the use of the international standards
does have its benefits. The test methods used to evaluate the EMC performance
of vehicles (and vehicle modules) should be similar around the world to assure
consistent performance. Products initially developed for sale in the North
American market may also be more easily marketed worldwide when tested against the
international standards.
Ultimately, standardization helps to assure consistent performance and reliability no matter where the product is being used. By using international standards to evaluate the EMC performance of products (when available), this will help the product manufacturers to better achieve the consistent performance and reliability desired by the consumer.
Ultimately, standardization helps to assure consistent performance and reliability no matter where the product is being used. By using international standards to evaluate the EMC performance of products (when available), this will help the product manufacturers to better achieve the consistent performance and reliability desired by the consumer.
Do you have any questions about EMC Standard Changes, EMC Testing, or other related topics? Please share your comments or questions below and this week's expert, Craig Fanning, will get back to you as soon as possible.