CISPR

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The Comité International Spécial des Perturbations Radioélectriques (CISPR; English: International Special Committee on Radio Interference) was founded in 1934 to set standards for controlling electromagnetic interference in electrical and electronic devices, and is a part of the International Electrotechnical Commission (IEC).

Organization[edit]

CISPR is composed of six subcommittees, each responsible for a different area, defined as:

  • A - Radio-interference measurements and statistical methods
  • B - Interference relating to industrial, scientific and medical radio-frequency apparatus, to other (heavy) industrial equipment, to overhead power lines, to high voltage equipment and to electric traction
  • D - Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal combustion engine powered devices
  • F - Interference relating to household appliances tools, lighting equipment and similar apparatus
  • H - Limits tfor the protection of radio frequencies
  • I - Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers

Technical standards[edit]

CISPR's standards cover the measurement of radiated and conducted interference. EMI test results can vary widely according to the exact layout of the equipment and cabling. CISPR set various standards for the test layout, to help improve the reliability of comparison between tests. These standards cover cable lengths, measurement device configuration and grounding schemes. The standards also address immunity from external interference.

When purchasing equipment, a company or organization can require compliance to one or more CISPR standards from the supplier.

CISPR have published over thirty standards to date. Some of the more important include:

  • CISPR 10 - Organization, Rules and Procedures of the CISPR. (1971). This standard has been withdrawn and its contents incorporated in the Supplement to the IEC/ISO Directives
  • CISPR 11 - Industrial, Scientific and Medical (ISM) Equipment -- Radio-Frequency Disturbance Characteristics -- Limits and Methods of Measurement.
  • CISPR 12 - Vehicles, boats, and internal combustion engine driven devices -radio disturbance characteristics -limits and methods of measurement
  • CISPR 14 - Electromagnetic Compatibility -- Requirements for Household Appliance, Electric Tools, and Similar Apparatus: 1) Emissions, 2) Immunity.
  • CISPR 15 - Limits and methods of measurement of radio disturbance characteristics of Electrical lighting and similar equipment.
  • CISPR 16 - Specification for radio disturbance and immunity measuring apparatus and methods. This is in 4 parts, three of which are further subdivied into several parts.
  • CISPR 20 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement
  • CISPR 24 - Information Technology Equipment—Immunity characteristics—Limits and Methods of Measurement.
  • CISPR 25 - Radio disturbance characteristics for the protection of receivers used on board vehicles, boats, and on devices—Limits and Methods of Measurement. [1]
  • CISPR 32 - Electromagnetic compatibility of multimedia equipment - Emission requirements. This replaced CISPR 13 and CISPR 22.
  • CISPR 35 - Electromagnetic compatibility of multimedia equipment - Immunity requirements This will replace CISPR 20 and CISPR 24

Application[edit]

Depending on the market, CISPR's standards are a benchmark or goal for suppliers to reach either to meet OEM requirements or as a product feature. For example, in the automotive electronic market, CISPR 25 is an increasingly popular benchmark and requirement for body electronics. Electronic suppliers have become increasingly focused on proving that their devices can meet CISPR 25, for example Texas Instruments has been releasing reference designs that prove one or more devices can meet the standard if used in a design correctly.[2]

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