EMC Testing: Electromagnetic Compatibility (2014/30/EU)

EMC testing (electromagnetic compatibility testing) confirms two things about an electrical or electronic product: that it does not emit disturbance that affects other equipment (emission), and that it keeps working when exposed to disturbance from outside (immunity). The tests are part of CE marking under the EMC Directive (2014/30/EU). CE Danışmanı (CE Consultant) plans these tests, coordinates them with accredited laboratories and prepares the technical file for manufacturers in Turkey and for companies shipping products to or from Turkey.

Which products need EMC testing?

Any product containing active electronics falls under the Directive. Examples:

• Household appliances and consumer electronics
• IT equipment: computers, printers, modems
• Industrial equipment: motor drives, PLCs, sensors, production machinery
• LED lighting and luminaires
• Power supplies and adapters

Simple passive items such as extension cables and switches are outside the scope.

Equipment not covered by the EMC Directive

• Radio equipment covered by the Radio Equipment Directive (2014/53/EU)
• Aeronautical products, parts and appliances intended for operating or controlling an aircraft in flight
• Equipment that, by its physical nature, can neither generate disturbing emissions nor suffer unacceptable loss of performance
• Custom-built evaluation kits for professionals, used solely for research and development

Which tests are carried out?

Emission tests

• Conducted emission (150 kHz – 30 MHz): disturbance the product sends back into the mains
• Radiated emission (30 MHz – 1 GHz, or up to 6 GHz): disturbance radiated into the environment
• Harmonic current (EN 61000-3-2): measured up to the 40th harmonic
• Voltage fluctuations and flicker (EN 61000-3-3)
• Discontinuous disturbance (click) and disturbance power tests

Immunity tests

• Electrostatic discharge (ESD) – EN 61000-4-2
• Radiated RF electromagnetic field – EN 61000-4-3
• Electrical fast transient / burst – EN 61000-4-4
• Surge – EN 61000-4-5
• Conducted disturbances induced by RF fields – EN 61000-4-6
• Power-frequency magnetic field – EN 61000-4-8
• Voltage dips and short interruptions – EN 61000-4-11

Not sure which tests your product needs? The EMC test requirements checker asks 12 questions and lists the tests that apply, those that do not and why, with links to the standards.

Common EMC standards

• EN 55014-1 / EN 55014-2: household appliances and similar apparatus (emission / immunity)
• EN 55032 / EN 55035: multimedia equipment (emission / immunity)
• EN 55015: lighting equipment
• EN 55011: industrial, scientific and medical equipment
• EN 61000-6-1 / EN 61000-6-3: residential, commercial and light-industrial environments (immunity / emission)
• EN 61000-6-2 / EN 61000-6-4: industrial environments (immunity / emission)
• EN 61326: measurement, control and laboratory equipment
• EN 61000-3-2 / EN 61000-3-12: harmonic current emission (up to 16 A / above 16 A)
• EN 61000-3-3 / EN 61000-3-11: voltage fluctuations and flicker (up to 16 A / conditional connection)

Where are the tests performed?

EMC tests need special facilities: a semi-anechoic or fully anechoic chamber, an open-area test site, a GTEM cell and calibrated generators and receivers. The manufacturer may test in its own laboratory or in an accredited EMC laboratory. An accredited laboratory report is not a legal requirement, but it is strong evidence during market surveillance.

How long does it take?

• Simple products (LED lighting, small adapters): 1–2 weeks
• Standard electronics (household appliances, office equipment): 2–4 weeks
• Complex industrial equipment (PLCs, motor drives, automation lines): 4–8 weeks

The duration also depends on the result. A product that passes at the first attempt finishes quickly; a failure means modification and retest.

What if the product fails?

A failed EMC test usually calls for a design change:

• Shielding: metal enclosure, ferrite beads, filter capacitors
• PCB layout: ground planes, shorter signal paths
• Cable and connector filtering: EMI filters or ferrite cores
• Power supply: filtering of switching power supplies

The laboratory locates the problem, the manufacturer changes the design and the product is retested.

Documents required for EMC conformity

• Technical file: general description, design and manufacturing drawings, circuit diagrams with explanations, operating description, list of harmonised standards applied, design calculations and the EMC test reports
• EU Declaration of Conformity: product model and type, batch or serial number; name and address of the manufacturer and authorised representative; the legislation and standards applied. It must be kept for 10 years after the product is placed on the market and updated if the product or the standards change.
• CE marking: affixed visibly, legibly and indelibly to the product or its data plate before it is placed on the market; on the packaging if the product is too small.

EMC together with LVD, RoHS and Machinery

Most electrical products need more than one directive. The Low Voltage Directive covers electrical safety, EMC covers electromagnetic compatibility and RoHS restricts hazardous substances. Machines with electronic control, such as CNC machine tools, robotic systems and automation lines, need EMC alongside machinery safety. One EU Declaration of Conformity lists all the legislation that applies.

EMC reports and imports into Turkey

Turkey applies the EMC Directive through its own Electromagnetic Compatibility Regulation (2014/30/AB), published in the Official Gazette of 2 October 2016, No. 29845. When electrical and electronic products are imported into Turkey, the EMC test reports and the Declaration of Conformity are checked during the TAREKS import inspection. If the report is missing or invalid, the goods cannot be cleared through customs.

How CE Danışmanı helps

• Identifying the directives and standards that apply to your product
• Planning the tests and coordinating them with accredited laboratories
• Following up the test process and advising on design changes after a failure
• Preparing the technical file and the EU Declaration of Conformity