Electronics safety pages
General
Electrical safety
Electromagnetic fields
Environmental protection
- IP Protection Classes - protection of enclosures against ingress of dirt or against the ingress of water is defined in IEC529
Guides
EMC is the ability of an electric device to function
satisfactory in its electromagnetic environment (immunity)
without introducing intolerable electromagnetic disturbances
to that environment (emissions) or to other devices there in.
General links
General articles
- ARC Technical Resources - an EMC specialist company which has good basic description of EMC testing and stantards on their web site
- Benchtop EMC Testing Techniques for Medical Equipment - using loop probes to help test devices for electromagnetic compatibility saves costly redesign and complements open area and chamber tests
- Build a Magnetic Field Immunity Tester - A precompliance test system can help you determine whether your products comply with standards such as the CE Marking.
- Computer simulation avoids EMI/EMC problems in high-speed IC packages - singal-integrity and EMI/EMC issues can be devastating in high-density, high-speed IC- package design, simulation techniques can help you model your design and anticipate these problems
- Designing for EMC in Datacom Systems
- Designing to avoid EMC problems - A summary of a series of articles looking at the European EMC (CE Marking) legislation and how to design to meet it
- Eavesdropping On the Electromagnetic Emanations of Digital Equipment: The Laws of Canada, England and the United States - rough draft from 1989
- Electromagnetic Compatibility: Part 1
- EMC components administer first aid - discovering late in the day that your product fails to comply with EMC regulations implies a tough redesign or a host of passive parts, applied simply and superficially, could be your salvation
- EMC-oriented design for CE marking of radio communications equipment - Test establishment of the European Union has created a standards puzzle for meeting EMC requirements. However, solving the puzzle is not as complex as you may think.
- EMI and circuit components: where the rubber meets the road - You need to know how components behave in the real world and what their limitations mean in terms of EMI. Some guidelines in proper component selection for EMI and in designing simple EMI filters will help in the battle.
- EMI simulation tools - number of vendors have announced software-based EMI-simulation tools
- Emissions killers trap common-mode currents - unshielded twisted-pair cable that is transformer-coupled to a digital system can easily act as a radiating antenna because of common-mode currents induced by unwanted stray coupling from the digital portions of the system
- European Economic Community Requirements for CE mark
- High-frequency signal-contaminations - information how RF can effect circuit accuracy and how to shield circuits against RFI
- Master Thesis: EMC of Telecommunication Lines
- Proper layout and component selection control power-supply EMI - All power-supply components, including voltage regulators, inductors, and transformers, and their layout determine the amount of EMI a supply generates. An overview covers the mechanisms and physical principles governing the generation and propagation of power-supply electrical noise.
- Use Shielded Electronic Enclosures To Meet EMC Standards - proper selection of shielding options early in the design cycle ensures electromagnetic compatibility without sacrificing other objectives
- Use spread-spectrum techniques to reduce EMI - spread-spectrum techniques are cost-effective ways to control clock-generated EM emissions
- Use Of Ferrites In EMI Suppression
- Using ferrites for interference suppression
- Using Grounding to Control EMI
Handbooks
FAQs
Power supplies
Medical electronics
Communication products
Computers
Protection against overvoltages
Regulations
Other
From the 1st January, 1996, all equipment containing electrical components or electronics need
to be 'CE' labelled if they are for sale within the European Community or EFTA.
For equipment manufactured in the EC, the manufacturers are responsible.
For equipment imported into the EC, the importers are responsible.
In order to meet the necessary legal requirements, tests need to be performed relating to
Electro-Magnetic Compatibility and a certificate of compliance needs to be generated and
signed by an authorised representative of the company. There are several ways in which to
obtain a certificate of compliance, and the most cost-effective of these is to do
'self-certification', whereby the appropriate measurements are done in-house using the
appropriate equipments.
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