EMC basic test standards

As with many technical disciplines, EMC is very complex and hence trying to define all the parameters, tests and limits into a single test standard would be very difficult. To overcome this and to provide some consistency across all product standards a hierarchy of standards is been developed. The diagram below illustrates this in the case of the information technology EMC standard for immunity (EN55024). The product specific standard is the one that a manufacturer complies with however it references a number of ‘basic’ test standards for the test methods, limits and phenomena.

In the case of EMC, there are many basic EMC standards. It is the job of the product standard to identify the phenomena that is relevant to that product group's environment and then reference the basic standard and appropriate limits. The table below indicates the current list of EMC basic standards. The basic standards are important to manufacturers and test labs alike for different reasons. Manufacturers need to keep a watching brief on what is being developed within the basic standard since it will have a long term impact on the design of products whilst test labs need to ensure that they are equipped with the appropriate test equipment and facilities when the product family standards make reference to the basic standards' methods.

The date of approval (DoA) is the date it was approved as an international standard whilst the DoP is the date of publication and that which National administrations either have to endorse or publish an identical national version. The Date of Withdrawal (DoW) is that latest date that any conflicting standard has to be withdrawn.

EN61000-4-x basic EMC test standards list

(Current as of 28th January 2010) 

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