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| CISPR 11 | |
|---|---|
| Name | CISPR 11 |
| Caption | Electromagnetic compatibility standard for industrial, scientific and medical equipment |
| Status | Published |
| Org | International Electrotechnical Commission |
| Series | CISPR |
| Related | IEC 61000-4, IEC 60601, FCC Part 18, EN 55011 |
CISPR 11
CISPR 11 is an international standard issued by the International Electrotechnical Commission’s CISPR committee that specifies limits and methods for radio‑frequency electromagnetic disturbance from industrial, scientific and medical equipment. It defines emission limits, measurement techniques, and equipment classification to ensure electromagnetic compatibility among devices regulated across jurisdictions such as the European Union, United States, Japan, China, and Australia. The standard interfaces with medical device rules, telecommunications frameworks, and national type‑approval schemes overseen by bodies like the European Committee for Electrotechnical Standardization, the Federal Communications Commission, and the Ministry of Industry and Information Technology (China).
CISPR 11 sets radiated and conducted disturbance limits and measurement protocols for a wide range of equipment categories used in laboratories, hospitals, manufacturing, and research. It is intended to protect incumbents such as Radio Astronomy Observatory operators, Air Traffic Control installations, Satellite Communications earth stations, and public safety radio services including International Telecommunication Union allocations. The document applies to equipment whose primary functions are industrial, scientific or medical rather than telecommunications, and it clarifies interactions with sectoral regimes like IEC 60601 for medical electrical equipment, ITU-R allocations, and World Health Organization guidance where electromagnetic effects intersect public health policy.
Limits are specified for conducted emissions on supply lines and for radiated emissions across frequency bands, with distinct limits for restricted environments including hospitals, laboratories, and aerospace ground facilities. The standard differentiates limits by equipment class and power rating, referencing measurement quantities used by European Parliament directives and regulatory frameworks such as Council of the European Union EMC Directive implementations. Emission limits are harmonized with regional standards like EN 55011, and inform regulatory rules such as FCC Part 18. Requirements consider coexistence with services governed under treaties like the International Telecommunication Convention and spectrum management principles from the International Telecommunication Union Radiocommunication Sector.
CISPR 11 prescribes measurement setups, detector types, antenna systems, and site characteristics for both conducted and radiated testing. Tests are performed in accredited facilities including National Institute of Standards and Technology laboratories, anechoic chambers used by institutions like European Telecommunications Standards Institute test houses, and open‑area test sites employed by Japan Radio Co. and national certification bodies. Methods reference standard equipment from suppliers and labs such as Rohde & Schwarz, Keysight Technologies, and Tektronix and rely on accreditation schemes established by International Laboratory Accreditation Cooperation signatories. Site validation follows practices promoted by the International Electrotechnical Commission and harmonization with measurement norms from ISO/IEC consortia.
The standard classifies apparatus into groups and classes (e.g., Group 1/2, Class A/B) based on the nature of emissions and intended installation environment, tying classifications to use cases like diagnostic imaging suites in hospitals, industrial heating plants, and research reactors. Applications range from laboratory microwave units to high‑power industrial heaters and clinical devices covered by European Medicines Agency regulations when combined with Medical Device Regulation (EU). Classifications are referenced by standards bodies such as British Standards Institution and national testing laboratories like TÜV Rheinland and SGS for market access documentation.
Compliance involves type testing, supplier declarations, and where required, third‑party certification by notified bodies designated under regional regimes like the New Approach and conformity assessment bodies in Canada and Brazil. Test reports and technical files are used to demonstrate conformity for market access, and manufacturers often integrate CISPR 11 evidence into broader compliance dossiers alongside IEC 61000‑6 series immunity requirements. National enforcement may be conducted by agencies such as the Federal Network Agency (Germany), Japanese Ministry of Economy, Trade and Industry, and Australian Communications and Media Authority.
CISPR 11 interfaces directly with standards including IEC 61000‑4‑3 for radiated immunity, IEC 61000‑4‑6 for conducted disturbances, and sector standards like IEC 60601‑1‑2 for medical devices and IEC 61010 for laboratory equipment. Regional derivatives include EN 55011 in Europe and the regulatory counterpart FCC Part 18 in the United States. Harmonization efforts are coordinated through organisations such as the International Organization for Standardization, European Commission, and national standards institutes including Standards Australia and the Standards Council of Canada.
Developed within the CISPR committee of the IEC, the standard evolved through multiple editions to respond to advances in high‑frequency equipment, spectrum congestion, and new industrial processes. Revisions incorporated input from stakeholders including research centers like CERN, aerospace organisations such as European Space Agency, and industry consortia like IEEE. Updates paralleled regulatory shifts driven by influential events and initiatives including the Radio Regulations updates of the International Telecommunication Union and harmonization programs of the European Free Trade Association and World Trade Organization technical barriers to trade work. The latest editions reflect collaboration among national committees such as DIN, AFNOR, BSI, JISC, and ongoing liaison with manufacturers, hospitals, and spectrum managers to address emerging technologies like wireless power transfer and high‑power RF industrial systems.
Category:Electromagnetic compatibility standards