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EMI EMC Testing

EMI EMC Testing is crucial when you are launching a new electronic product. Let, Corpbiz assist you in conducting the same testing without hassle.

  • Assistance if evaluating the potential risks of the products
  • Assistance in proper EMI EMC testing
  • Regularly informing the client about the progress of the test.
  • End-to-end support in Electrical Safety Testing.
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Conducting EMI EMC testing and spotting the problems at an early stage.

Step 1

Issue the EMI EMC test report as required under the EMI EMC Compliance.

Step 2

Issuing the EMI EMC Certification on successful testing and monitoring of the product.

Step 3

Overview of EMI EMC Testing

EMI is short for Electromagnetic Interference and is an electronic emission interfering with the components, RF systems and most electronic devices. It is the result of man-made or natural occurrences. All electronics must be shielded to protect electronic equipment and components from electromagnetic radiation, and if a device is improperly shielded from EMI, it will not work. Such shielding ensures that electronics remain fully operational and work without any interference. If a component is vulnerable to interference, then it will not work. 

Electronic devices generate electrical noise that interrupts cables and wires, causing problems for connected devices. The EMC stands for Electromagnetic compatibility, and it is the term used to describe a device's functioning in an electromagnetic environment.  

EMI is for the radiation, and the EMC is merely the ability of a system to operate within the presence of radiation. EMI EMC Testing predicts the product performance in any electromagnetic environment. It also determines the possibility of interference with other equipment degrading performance. It is required to comply with the regulations or for information and product improvement purposes. EMI EMC Testing is basically categorised into testing for emissions and testing for immunity. 

Products under EMI EMC Testing

Some of the primary products under the EMI EMC Testing are as follows:

  • Automotive 
  • Telecommunication
  • IT/AV
  • Multimedia 
  • Lighting
  • Electrical Household
  • Machinery
  • Auto components 
  • Railway
  • Medical

EMI EMC Standards List

Here is the list of common EMI EMC Standards:

Applications

Common EMI EMC Standards

Medical

IEC 60601-1-2

Automotive

SAE, ISO7637, IEC CISPR-25, ISO1145-1, ISO1145-2

Military

MIL-STD-461, DEF STAN 59/411, MIL-STD-704, MIL-STD-1275, MIL-STD-1399

Industrial

FCC Part 15 class A, EN 61000-6-4 (generic), EN 61000-6-2(generic)

Commercial

FCC Part 15 class B, EN 61000-6-3 (generic), EN 61000-6-1(generic)

Switchgear and control

EN/IEC 60947-1

Power station and substation

IEC TS 61000-6-5

Process control and measurement

EN/IEC 61326-1

Benefits of EMI EMC Testing

Following are the benefits of EMI EMC Testing:

  • Safety 

It ensures the safety of users and operators of any electronic products.

  • Reliability 

It tests whether products meet the required objectives within the given environment. 

  • Regulations and standards 

This testing is mandatory from a regulatory perspective. Applicability is determined by the manufacturer, manufacturer's location, consumers or the organisation/industry. 

EMI EMC Testing

Procedure for EMI EMC Testing

Tests that are included under EMI EMC testing are as follows:

  • Voltage fluctuation and flicker
  • Current harmonic emission
  • Electrostatic discharge 
  • Radiated susceptibility 
  • Electric fast transient 
  • Surge
  • Conducted susceptibility 
  • Power frequency magnetic field
  • Pulse frequency magnetic field
  • AC voltage dips and interruption 
  • DC voltage dips and interruption
  • Ring wave
  • Conducted emission 
  • Radiated emission 

The stages involved in the EMI EMC testing are as follows:

  • Development Test 

This test ensures that the best possible EMI EMC performance is obtained. It is easier to make changes at this stage, and any filters, circuit layout, screening and other aspects of design are easily changed at this stage. 

  • Pre-Compliance Test 

It is done once a representative working model of the final equipment is available. Testing is generally performed at the development lab as part of the product testing programme. The main purpose of such a test is to check the performance of the complete product.

  • EMI EMC Compliance Test 

When the product development is complete, it is necessary to undertake a full run of the EMI EMC compliance testing. This ensures that the product meets all the requirements with respect to the standards it needs to meet. The basic nature of the test depends on the product but needs to be sufficient to ensure that the product conforms to the EMI EMC standards. 

  • Production Test 

The main EMI EMC testing enables the product to be sold. However, there is an obligation on the manufacturer to ensure that the product meets the stated performance. In any production process, there are small changes as the supplied components change. This has an effect on the EMI EMC test performance, and therefore, it is an obligation of the manufacturer to perform some tests.

Frequently Asked Questions

EMS stands for Electromagnetic susceptibility, which describes how a device is itself affected by the disturbances coming from the environment.

The agencies that are dealing with the EMI EMC Testing are the Institute of Electrical and Electronics Engineers (IEEE) and International Electrotechnical Commission (IEC).

The testing required for EMI EMC compliance falls into the following categories:

  • Conducted emissions 
  • Radiated emissions
  • Conducted immunity 
  • Radiated immunity 
  • ESD immunity 
  • Transient immunity 
  • Surge immunity

The different types of EMI are as follows:

  • Conducted EMI 
  • Common Mode EMI 
  • Differential Mode EMI
  • Radiated EMI

Conducted emission is a process of coupling electromagnetic energy from a device to its power cord.

This test involves measuring the EMI in the air, which is generated unintentionally by the device under test, and as it travels through air, thus it is called radiated emission.

OATS stands for the Open Area Test Site, which is the most common radiated emission test site.

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