Select Page

EN 55011 Testing

The limits and methods of measurement contained in EN 55011 apply to industrial, scientific and medical (ISM) equipment, and to electrodischarge machining (EDM) and arc welding equipment. Procedures are given for the measurement of radio-frequency disturbances and limits are laid down within the frequency range 9 kHz to 400 GHz. Requirements for ISM lighting apparatus and UV irradiators operating at frequencies within the ISM frequency bands defined by the ITU Radio Regulations are contained in EN 55011.

The manufacturer and/or supplier of ISM equipment shall ensure that the user is informed about the class and group of the equipment, either by labeling or by the accompanying documentation. In both cases the manufacturer/supplier shall explain the meaning of both the class and the group in the documentation accompanying the equipment.

EN 55011 separates equipment into two groups:

  • EN 55011 Group 1 ISM equipment contains all ISM equipment in which there is intentionally generated and/or used conductively coupled radio-frequency energy which is necessary for the internal functioning of the equipment itself.
  • EN 55011 Group 2 ISM equipment contains all ISM equipment in which radio-frequency energy is intentionally generated and/or used in the form of electromagnetic radiation for the treatment of material, and EDM and arc welding equipment.

Excluded from the testing requirements and limits of EN 55011 are components and subassemblies not intended to perform any stand-alone ISM function.

EN 55011 separates equipment into two classes:

  • EN 55011 Class A equipment is equipment suitable for use in all establishments other than domestic and those directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.
  • EN 55011 Class B equipment is equipment suitable for use in domestic establishments and in establishments directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.

Keystone Compliance assists manufacturers with EN 55011, BS EN 55011, DS/EN 55011, and DIN EN 55011 compliance. Please contact us for more information on how Keystone Compliance can assist you with identifying and fulfilling your EN 55011 needs.