The IEC Electromagnetic Compatibility Standards for Industrial Process Measurement and Control Equipment document provides in-depth information on the interference susceptibility tests − tests designed to determine the capacity of equipment to function correctly once it's installed in its designated working environment. The exams are part of the International Electrotechnical Commission IEC 1000-4, a standardized reference by which the performance of industrial-process measurement and control instrumentation are appraised after exposure to electric or electromagnetic interference from external sources.
Determining which exam is the most suitable for the equipment is based on a number of factors: The type of interference to which the equipment is exposed to during installation, while taking into account the electrical circuit, the environment where the system is intended to work, and the quality of the shielding. The document reviews a total of five tests in detail by first clarifying their purpose, and then walking the reader through the initial setup conditions, the test procedure, and finally the test result parameters.
The figure demonstrates an example of test setup for tabletop equipment
The five exams include the electro static discharge (ESD) requirements, radiated electromagnetic field requirements, electrical fast transient (burst) requirements, and finally the surge voltage immunity requirements. Charts and diagrams are also provided in the report.
Access the entire report here or visit Littelfuse for additional information.
By Maximilian Teodorescu
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