Overview of EMC Testing
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Overview of EMC Testing. Martin Foley Commercial Manager – Industry EMC . Contents. EMC for all reasons Overview of EMC EMC Test Facilities Different tests for different markets Routes to Compliance How do you save money? Price Drivers

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Overview of EMC Testing

Martin Foley

Commercial Manager – Industry EMC


EMC for all reasons

Overview of EMC

EMC Test Facilities

Different tests for different markets

Routes to Compliance

How do you save money?

Price Drivers

Benefits of using TÜV Product Service

What is emc
What is EMC?

EMC – Electromagnetic Compatibility

The problems of emc
The problems of EMC

  • interference with Broadcast Receiver reception

  • interference from radio transmitters

  • interference from transients

Test overview

Radiated HF/RF emissions

Radiated HF/RF immunity





Test Overview


AF/RF emissions


LF/ RF immunity

Mains harmonics

& flicker

Surges /

PSU Conditioning

Voltage dips

& interrupts


Transients/ Lightning



LF/RF immunity

NB other tests may apply, e.g. magnetic field emissions or immunity, depending on the equipment or application


  • EMC Testing

    • Test Documentation Construction & Review

    • Validation of customers requirements.

    • Readiness for Test Reviews covering

      • Logistics of Test

      • Application of Test

      • Rationalisation of Test Programmes

    • Testing & Assistance with EMC issues

    • Reporting (10 day turnaround)

    • Certification (Bearley Activities Only)

  • TEMPEST Testing (TEMPEST Logo)

    • Test Documentation Construction & Review

    • Establishing customers requirements and rationalisation of the work program

    • Testing

    • Reporting (10 day turnaround)

  • In-Situ Testing for the above

    • Surveys, utilising clients capacity, trials, large equipments which cannot be brought into a Test House Environment.

    • Consultancy to aid clients with solutions to their EMC issues.

Emc test capability continued
EMC Test Capability - Continued

  • Conducted Emissions testing: 20Hz – 400MHz

  • Radiated Emissions Testing: 14kHz – 40GHz

  • Conducted Susceptibility: 20Hz – 400MHz (AF & BCI)

  • Magnetic Susceptibility: 20Hz – 150kHz

  • Radiated Susceptibility: 10kHz – 40GHz (with 18- 40GHz amps hired from Astrium). Levels up to 200V/m CW and 600V/m minimum pulsed.

  • Power Supply Conditioning: New equipment to meet the Airbus requirements up to 800Hz with DO160E software being developed as an add on.

  • Transient & Lightning: Elgal for Defence requirements, EMC Partner system for all indirect Civil Aerospace.


Octagon House:

4 x Screened Enclosures

1 x Lightning Lab & 1 x Prep Area



1 Screened Enclosure

Various small chambers & Labs

Why emc is important
Why EMC is important?

  • to meet legal requirements (e.g. EMC Directive)

  • to meet voluntary schemes

  • to meet a contractual obligation (e.g. DEF STAN etc.)

Markets addressed

Markets Addressed

Markets Addressed

  • Aerospace

    • Civil Aerospace - Airbus, Boeing (RTCA DO-160)

    • JSF, Eurofighter for Military (Mil Std, EFA)

  • Defence

    • Air (as above)

    • Land (Vehicles, Man Portable Equipments, Security systems, etc)

    • Ships (From submarines, in-situ, to systems at the test facility)

  • Industrial

    • Rail, Automotive (Car products, Motorcycles, Products for Rail as well as whole vehicles trackside)

    • Commercial (Showers, Broadcast Receivers (audio/visual), Basestations etc)

Different tests for different markets

  • Commercial:

  • RF field swept or stepped

    • from 80MHz to 2.7GHz (possibly up to 6GHz)

    • amplitude modulated 80%, 1kHz

    • field set by substitution method

    • field uniformity at EUT, +6 -0dB

  • each face of EUT subjected to vertical and horizontal polarizations

  • levels from 1V/m to 10V/m and above

  • Military, aerospace and automotive:

  • RF field swept or stepped

    • from 14kHz to 40GHz

    • modulation EUT-dependent

    • field set by local monitoring, no uniformity specification

  • specific test setup on ground plane

  • levels from 1V/m to 56000V/m (TÜV limited)

Different tests for different markets

Different tests for different markets1
Different tests for different markets

Military -

  • There are two main set ups in a screened enclosure for military & aerospace equipment depending on how it will be installed in its intended environment.

    • On a ground plane.

    • On a mannequin or non conductive ground plane.

  • UK standards converging with NATO and US.

  • Increasing immunity levels due to higher power pulsed transmitters.

  • Increasing lightning levels due to more composites in aircraft.

Different tests for different markets2
Different tests for different markets

Civil -

  • We are seeing a growing trend for CE marking to be applied to military equipment broadening the scope of equipment we need to address.

  • Test levels are increasing specially in safety critical environments i.e. Rail.

  • The standards are changing at almost a daily basis with general emissions standards converging to American standards.

  • For many large items limited to testing on-site.

Routes to compliance
Routes to Compliance

  • Accreditation covering testing in our permanent laboratory and also SMT scheme.

  • Manufacturer’s test reports can be used to obtain EMC Attestations for CE marking, CB Certificates via the CB Scheme.

  • Initial audit of the test laboratory in accordance with ISO 17025.

  • Support and training.

  • Issue of required attestations and / or CB Certificates.

  • A combination of spot check testing and annual laboratory assessments ensure the continued smooth operation of the SMT partnership.

How do you save money
How do you save money?

  • Design Review, Risk Assessments and GAP Analysis (reduce the amount of tests).

  • Prepare a structured Test Plan.

  • Be Test House savvy.

    • Cable lengths & terminations

    • Power supplies

    • Functional test equipment

    • On site support

  • Pre-compliance – gain confidence before full qualification testing or going into production.

Price drivers
Price Drivers

What will drive the price of your EMC test regime?

  • Market access – Where do you want to sell it?

  • Specification requirements – How and where will it be used?

  • Number of modes of operation?

  • Dwell time of EUT – Is it continuous operation?

  • Number of ports or power / control & signal cables?

  • Size of product (Can it be done in house or at the clients site?)

Benefits of using t v product service
Benefits of using TÜV Product Service

  • The right people

    • With over 50 years’ experience TÜV Product Service has a core team of global experts well versed in their fields of testing and certification of products to worldwide standards.

  • The right time

    • With over 11 chambers and other facilities, flexibility to meet your lead-times regardless of length of project

    • Flexible working covering shifts and weekends

  • The right solution

    • Complementary services such as One-stop testing and consultancy or certification

    • Flexible Schedules (always the first to achieve accreditation to address new standards)

    • At our site or we will come to you

    • Industry leading report turnaround – 48 hours on demand