CISPR 11/ EN 55011
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
|CISPR 11||Radiated emissions|
|Conducted emissions input power|
|IEC 61000-3-2||Harmonic current emissions|
|IEC 61000-3-3||Voltage fluctuation & flicker|
|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|