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EMC testing

With the development of electrical and electronics technology, becoming increasingly prevalent in household electrical appliances and electronic, radio and television, post and telecommunications communication and computer network increasingly developed, increasingly complex electromagnetic environment and deterioration, the electromagnetic compatibility of electrical and electronics products (EMC, EMI electromagnetic interference and electromagnetic resistance EMS) problem is increasingly attention by governments and enterprises. Ec government regulation, since January 1, 1996, all electrical products must pass the EMC certification, labeled with CE certification before they can in the European market sales. The move caused widespread influence in the world, governments have taken measures to RMC mandatory management performance of electrical and electronics products. Electromagnetic compatibility (EMC) according to the EU directive 2014/30 / EU, all of electronic electrical products sold in the EU market must be in the interference of other products and anti-interference of foreign influence strictly conform to the requirements of the EU law.

Electromagnetic compatibility directive

In addition to the danger of mechanical, the eu made the 89/392 machine instructions: in order to blend the European Union member states about the electromagnetic interference tolerance standards, the eu council announced on May 3, 1989 on electromagnetic compatibility between member states related laws, the blending of electromagnetic compatibility directive (ElectromagneticCompatibilityDirective, 89/336 EEC, EMC directive), followed by 92/31 / EEC, 93/68 / EEC secondary revision. Now the new EMC directive 2014/30 / EU, we conducted EMC tests are all within the scope of the directive requirements.


Does what is electromagnetic compatibility (EMC)?

Before that process compliance with EMC directive to EMC are defined as follows:

A device or devices and other devices operating at the same time, will not affect the normal work for electromagnetic interference problem of ability. Which include:

EMI (ElectromagneticInterference)/electromagnetic interference:

A device or equipment in the process of operation have a negative function of the signal, this signal is don't want and meaningless, it may come from the outside world also may come from yourself.

Electromagnetic interference and can be divided into two directions:

CE (ConductedEmission) : conduction radioactive

RE (RadiatedEmission) : radioactive radiation

EMS (ElectromagneticSusceptibility)/electromagnetic tolerance

A device or equipment in the process of operation is not affected by electromagnetic environment around.

Electromagnetic tolerance and can be divided into two directions:

CE (ConductedSusceptibility) : conduction radioactive

RE (RadiatedSusceptibility) : radioactive radiation

What does the equipment need to comply with the emc?

In accordance with the instructions Article2.1 EMC directive, contains all the equipment is easy to produce electromagnetic interference, or the function of itself vulnerable to electromagnetic interference effect of the equipment.



Of the EMC directive near three instruments and equipment listed are as follows:

• domestic radio and television receivers

• industrial manufacturing equipment

• action radio

Radio and telephone commercial action, action

• medical and scientific equipment

• information technology equipment

• general electrical appliances and household appliances

, aviation and navigation using wireless devices

• education with electrical equipment

And equipment, telecommunications network

, radio and television transmitter

• lamp and fluorescent lamp

Does is related to the electromagnetic compatibility directive of the industrial products shall conform to the standard?

• EN55011: Limitsandmethodsofmeasurementofradiointerferencecharacteristicsofindustrialelectricaldevice

• EN50081-2: Electromagneticcompatibility - Genericemissionsstandard

Part2: Industrialenvironment

• EN50082-2: Electromagneticcompatibility - Genericimmunitystandard

Part2: Industrialenvironment

Does industrial product emc test types and according to the standard

EMI/electromagnetic interference

CE (ConductedEmission)/conduction radiation test: EN55011

RE (RadiatedEmission)/radiation emission test: EN55011

EMS/electromagnetic tolerance

CS (ConductedSusceptibility)/conduction immunity test: EN61000-4-6

RS (RadiatedSusceptibility)/radiation immunity test: EN61000-4-3

ESD (Electrostaticdischarge)/ESD immunity test: EN61000-4-2

EFT/Burst (Electricalfasttransient)/fast transient pulse immunity test: EN61000-4-4

• PFMF (Powerfrequencymagneticfield)/power frequency magnetic field immunity test: EN61000-4 to 8

* the firm/lightning Surge immunity test: EN61000-4-5

* PQF (Voltagedips, interruptionandvariation)/voltage transients immunity test: EN61000-4-11

* : are for reference only, not necessary.