The Comité International Special Pertubations Radioélectriques (CISPR) is a special committee for radio interference founded as early as the 1930s. The CISPR develops guidelines
for interference radiation measurements. The extensive subject area is dealt with by several working groups. It deals with interferenceradiation measurements of electronic and medical equipment, household appliances and lighting
, power supply systems and networks, RF interference radiation from radio transmitters and other electromagnetic radiation sources. In addition to the guidelines for interference radiation measurements, CISPR also works out the regulations for shielding measures and the earthing of radiation measuring equipment. The guidelines worked out are published in the CISPR standards, they are used for radiation and emission safety and are incorporated in the European standard (EN) EN 550xx and in the VDE regulations.