Electromagnetic Compatibility (EMC) Laboratory Services: Ensuring Device Reliability

Electromagnetic compatibility (EMC) is the interaction of electromagnetic energy generated by electronic equipment and the surrounding environment. EMC testing is performed to ensure that devices are designed and specified to function in electromagnetic environments they will commonly be exposed. Testing verifies that a device will function in the presence of electromagnetic interference (EMI), the device will not radiate unacceptable levels of electromagnetic energy, and that a device will not disrupt the function of other nearby electronic devices. A typical testing program consists of various emissions and immunity requirements.

Electronic manufacturers must perform EMC testing on their components and systems before they can be placed on the market to ensure their electronics do not interfere with each other. Emissions and immunity testing helps to validate a device’s performance and safety. Learn more about the different types of EMC tests.

This article delves into the world of EMC testing, exploring its purpose, different types of tests, and the importance of compliance for various industries.

What is EMC Testing?

Electromagnetic compatibility (EMC) testing is a process conducted to ensure that an electrical and electronic device functions satisfactorily in its intended real-world electromagnetic environment without emitting harmful electromagnetic interference (EMI). The goal/purpose of EMC testing is to verify whether the product complies with the requirements of applicable EMC standards for electromagnetic compatibility (EMC).

EMC testing generally involves two types of tests: emissions testing and immunity testing.

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• Emission Measurement Testing: In EMC emission measurement testing, the amount of EMI emitted by a device/product during normal operation is evaluated. The emission measurement testing ensures that the product does not emit more than the EMI emission limit specified in the relevant EMC emission standards.
• Immunity Testing: In the immunity testing, the product is subjected to test signals as per EMC immunity standards requirements. The immunity testing ensures that the product meets the requirements of relevant EMC immunity standards and can withstand external EMI while operating in its intended electromagnetic environment.

In summary, EMI testing is concerned with a product’s ability to avoid causing electromagnetic interference, while EMC testing is concerned with a product’s ability to function properly in the presence of electromagnetic interference.

EMC testing is conducted in a Laboratory equipped with specialized tools like EMC test chambers and other testing instruments to provide controlled conditions for accurate assessment of the EMC performance of the device under test (DUT).

Different Types of EMC Tests

Different types of EMC tests may be performed on the device or product as per EMC standards requirements, including the following:

• Conducted emission (CE) measurement test - performed to measure the amount conducted EMI emitted by a device while working.
• Radiated emissions (RE) measurement test - performed to measure the amount of radiated EMI emitted by a device while working.
• Harmonic emission measurement test - performed to measure the harmonic currents emitted by the device while working.
• Voltage fluctuations and flicker test - This test ensures that electronic devices will not introduce excessive fluctuations or flicker into the power system.
• Conducted immunity test - performed to evaluate the device's ability to withstand conducted EMI originating from an external source.
• Radiated immunity test - performed to evaluate the device's ability to withstand radiated EMI originating from an external source.
• Electrostatic Discharge (ESD) test - performed to evaluate the immunity of a device to electrostatic discharge (ESD).
• Magnetic field testing - performed to evaluate the immunity of a device to the power frequency (50/60 Hz) magnetic field.
• Electrical Fast Transients and bursts test - performed to assess the product's ability to withstand the electrical fast transients and bursts.
• Surge test - performed to assess the product's ability to withstand the surge (surge voltage and current).
• Voltage dip test - performed to evaluate the ability of a device/product to withstand voltage dip.

The FCC EMC regulations apply to a wide range of electronic products, including consumer electronics, communications equipment, medical devices, and many others. The FCC EMC regulations are an important aspect of ensuring the reliability and safety of electronic products, and are a critical aspect of product development and certification.

Full-Compliance Testing

Electrical and electronic products require EMC certifications to put them into the market. Full-compliance testing (or simply compliance testing) is the EMC testing performed on the final version of a product/device for EMC certification purposes. The testing process involves different types of EMC tests like conducted emission tests, radiated immunity tests, ESD, etc., as described above.

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The full-compliance testing is conducted on a product as per the relevant EMC standards without any deviation, by fully qualified experts, and using all the necessary testing equipment/tools.

EMC-certified products/devices operate satisfactorily in their intended electromagnetic environment without causing interference or disruption to other nearby equipment. The EMC-certified products can be put on the market.

Pre-Compliance Testing

Pre-compliance testing is the EMC testing conducted before full-compliance testing to identify potential EMC issues early in the product development stage. It typically uses simplified setups and procedures to evaluate the device's EMC performance.

The benefits of pre-compliance testing include the following:

• Early EMC issue detection
• Improves the chances of a successful first pass in full-compliance testing without delay and costly design alteration
• Reduces EMC standards non-compliance issues during full-compliance testing and certification
• Ensure product quality, cost saving, and faster time to market

On-Site Testing

On-site (In-Situ) EMC testing means the EMC testing conducted on a product at the location where the equipment is located/installed. On-site EMC testing is ideal when the equipment is too large and impractical to transport to the EMC testing laboratory. This testing is conducted at the customer site.

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In this testing, an EMC testing company will send a dedicated on-site (in-situ) EMC test team with the necessary testing equipment to the customer site and perform a full range of EMC tests as per EMC standards.

EMC Testing Services Providers

EMC Directory has created the largest database of EMC Testing companies. The EMC testing companies are available to perform EMC testing services (emission test, immunity test, pre-compliance test, MIL-STD-461 testing, etc.) for a wide range of industries, including electronics, industrial, medical, automotive, and more.

Companies are available to provide services such as EOL diagnostics, Calibration, Development assistance, Remediation, and other services.

Applied Technical Services offers an extensive list of EMI and EMC testing services in our state-of-the-art EMC lab. At ATS, our EMC testing lab is ISO 9001:2015 registered and ISO/IEC 17025:2017 accredited in calibration by the A2LA. We conduct electromagnetic compatibility and interference testing at the highest level of precision and accuracy to ensure our clients receive the best possible service.

UL Solutions has a global network of electromagnetic compatibility (EMC) testing laboratories that allows us to support you at your convenient location. Our EMC experts have deep expertise and experience in the field of EMC measurement and regulatory requirements.

Elite Testing Services

Through seven decades, Elite has been a recognized leader in both electromagnetic interference (EMI) testing and electromagnetic compatibility (EMC) testing. Our unrivaled expertise, in tandem with state-of-the-art test equipment, is helping products across a wide range of applications and industries meet product safety standards through EMI and EMC compliance.

Elite is ISO17025 accredited by two organizations and ISO 17065 accredited for certification of wireless devices in the US and Canada. Our expertise and methods are highly regarded by assessors, as well as by our clients, major integrators and OEMs.

Elite Testing Service Details

• Automotive EMC Testing: Elite is the leader in automotive EMC testing for components and whole vehicles.
• Military EMC Testing: Since 1954, Elite has been providing Electromagnetic Compatibility (EMC) test services for manufacturers of military electronic systems.
• MIL-STD-461 Testing: Elite is uniquely equipped to provide MIL-STD-461 Military EMC Testing with our over 60 years of experience.
• Commercial Aviation EMC Testing: Proven leader in aerospace EMC testing services for commercial aviation
• RTCA DO-160 Testing: Elite is uniquely equipped to provide RTCA DO-160 and related Commercial Aviation EMC and Environmental Stress Testing.
• Regulatory EMC & Wireless Testing: FCC, ISED, & CE Mark - One-stop compliance service is our mission.
• Lightning, HIRF &, High Power Testing: Elite experts can also develop customized methods and equipment for almost any electrical transient wave shape required.
• Antenna Performance Testing: Elite validation testing helps maximize antenna performance in any application.

Elite EMC Testing Capabilities

Our EMI/EMC testing lab is the best-equipped lab in the industry, helping you achieve compliance quicker. We carry more high power amplifiers, spectrum analyzers, receivers, scopes, antennas, horns, and other specialized equipment than any other EMC test lab. Our HIRF capabilities extend to 5,000V/m, we offer lightning tests up to level 5 for all DO-160 waveforms, and we can provide high altitude EMP testing at 50,000V/m.

Our EMC testing services are handled by dozens of full-time engineers, senior personnel, and full-time software engineers, all of whom provide unrivaled technical support and make us one of the industry’s most trusted EMI/EMC testing labs. What’s more, staff members are iNARTE credentialed and many Elite personnel are active in important industry standards committees - they’re at the ground level of understanding and contributing to new regulations and technology in EMC testing and more.

We have an expansive suite of absorber-lined EMC testing chambers including multiple rooms configured for Automotive CISPR 25 testing, 3-meter chambers configured for CISPR 22, and chambers configured for whole-vehicle testing. We also have multiple reverberation chambers, our largest having a uniform test area of 8Ft x 16Ft.

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