EMC Safety Testing

What is Electromagnetic Compatibility (EMC) Testing?

1. EMC (Electromagnetic Compatibility): EMC refers to the ability of a device or system to function properly in its electromagnetic environment without introducing intolerable electromagnetic interference (EMI) to anything in that environment. EMC testing involves a series of assessments to ensure that a product meets electromagnetic compatibility requirements.

2. Definition of EMC: In the same electromagnetic environment, a device should operate normally without being affected by interference from other devices, while also not disturbing the operation of other devices.

3. Three Key Elements of EMC: The absence of any one of these prevents an EMC issue from forming:

   - Interference Source

   - Coupling Path

   - Sensitive Equipment

Common Abbreviations:

1. EMC (Electromagnetic Compatibility)

2. EMI (Electromagnetic Interference)

3. EMS (Electromagnetic Susceptibility)

4. OATS (Open Area Test Site)

5. CISPR (International Special Committee on Radio Interference)

6. IEC (International Electrotechnical Commission)

7. EUT (Equipment Under Test)

8. FCC (Federal Communication Commission)

9. CE: Stands for “Conformité Européenne” (European Conformity)

Classification of EMC Testing Standards:

1. Product-Specific Standards: Dedicated requirements for specific devices such as in-vitro diagnostic equipment.

2. Product Category Standards: Standards for a particular category of products, e.g., EN 61326-1: Electrical equipment for measurement, control, and laboratory use - EMC requirements - Part 1: General requirements.

3. Generic Standards: Define general testing methods and limit values, indicating the environments they apply to. Example: en61000-6-2 - Generic immunity standard for industrial environments, often used as the basis for other EMC standards and not specific to any product type.

4. Basic Standards: e.g., EN61000-4-X series standards.

Common EMC Test Items:

EMC Test Composition:

EMC is composed of two major categories: EMI (interference) and EMS (immunity).

Electromagnetic Interference (EMI) Testing:

- Semi-Anechoic Chamber Test

- EMI Conduction Test

- Disturbance Power Test

- Harmonics Test

- Flicker Test

- Click Test

Electromagnetic Susceptibility (EMS) Testing:

- electrostatic discharge test (ESD): IEC61000-4-2, GB/T17626.2

- Radiated Susceptibility Test (RS)

- Electrical Fast Transient/Burst Test (EFT): IEC61000-4-4, GB/T17626.4

- Surge Immunity Test

- Conducted Susceptibility Test (CS)

- Power Frequency Magnetic Field Immunity Test

- Voltage Dips and Interruptions Test

Our Services by Industry:

1. EMC Testing for Household Appliances and Consumer Electronics

2. EMC Testing for Medical Devices

3. EMC Testing for Military and Aerospace Equipment

4. EMC Testing for Telecommunication (IT) Equipment