CISPR 11/ EN 55011

Amendment 2

Industrial, scientific and medical (ISM) radio-frequency equipment – Electromagnetic disturbance characteristics – Limits and methods of measurement

CISPR 11 is a broadly used international standard for electromagnetic compatibility within Europe for electromagnetic emissions or disturbances from Industrial, Scientific, and Medical, ISM, Equipment. CISPR 11 is conserved by CISPR: the International Special Committee on Radio Interference. It has grown from a simple document to a complex document involving a number of types of products

CISPR 11 applies to a very huge variety of equipment including everything from Wi-Fi systems, microwaves through to arc welders, all of which fall into the industrial, scientific and medical category which can use the ISM license-free bands like 2.4 GHz.

CISPR 11, EN 55011 is a standard covering radiated and conducted emissions. Most products will require an assessment of immunity standards, such as EN 61326-1: Electrical equipment for measurement, control and laboratory use; or EN 61000-6-2: Generic Standards Immunity for industrial environments.

It has grown from measuring products at a larger distance (100 meters and 30 meters) for Class A Equipment to measuring them at 3 meters. Class B equipment measurement distances have seen an equivalent degradation of “far-field” radiated emission measurements. This steady erosion of the “laws of physics” is worrisome and a trend to reverse this erosion is overdue in the engineering field of EMC and the EMC Standards arena.

List of tests

Emission Tests
CISPR 11	Radiated emissions
	Conducted emissions input power
IEC 61000-3-2	Harmonic current emissions
IEC 61000-3-3	Voltage fluctuation & flicker
Immunity Tests
IEC 61000-4-2	Electrostatic discharge immunity test
IEC 61000-4-3	Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4	Immunity to Electrical Fast Transient
IEC 61000-4-5	Immunity to Surges
IEC 61000-4-6	Immunity to Conducted Disturbances
IEC 61000-4-8	Power frequency magnetic immunity test
IEC 61000-4-9	Pulse magnetic field immunity test
IEC 61000-4-11	Voltage dips
IEC 61000-4-11	Voltage interruptions