PCB enclosure design, manufacture and assembly need to be considered early in equipment design to avoid costly modifications and delays in bringing the product to market. Alan Warner Tecan Components Ltd. Weymouth, UK With the proliferation of electronics, especially wireless and radio applications, in all areas of everyday life, the need for reducing radiated interference … [Read more...]
Simulation of In-Vehicle Human Exposure to Electromagnetic Fields from On-Board Transmittors
Numerical models can provide data from enormous numbers of points and for a number of human simulants Alastair R. Ruddle, PH.D., MIRA Limited Nuneaton, UK On-board transmitters are already commonly encountered in the vehicle environment; typical examples include mobile telephones, Bluetooth systems, and communications equipment used by the emergency services and armed forces. … [Read more...]
Handheld ESD Detector Indicates Relative Electrical Strength of Each Event
The 3M™ ESD Pro Event Detector from 3M Electronic Solutions is a handheld portable instrument that detects and counts discharges and indicates the relative electrical strength of each ESD event on a bar graph display. The device is intended to provide a quick measure of ESD protection - critical factor in sensitive component applications such as electronics assembly and … [Read more...]
Defense Technology Firms Announces Successful Completion of EMI Testing
Australian defense technology firm Metal Storm has announced that it has conducted successful electromagnetic interference (EMI) testing on its 40-mm ammunition tail propulsion system. Testing was conducted at a National Association of Testing Authorities (NATA) accredited facility in Melbourne and was the most rigorous performed as yet on Metal Storm technology. Metal Storm … [Read more...]
IEEE Publishes Guide for the Application of SPDs for Lower Power AC Power Circuits
The IEEE Guide for the Application of Surge-Protective Devices for Low Voltage (1000 V or Less) AC Power Circuits (C62.92-2007) provides specifiers and users of surge-protective devices (SPDs) about the application considerations associated with power distribution systems within North America. This guide applies to SPDs to be connected to the local side of the service entrance … [Read more...]
IEC Issues Draft of Amendment on ICs and Measurement of EM Emissions
IEC 61967-6 am1 Ed. 1.0 is entitled "Integrated Circuits - Measurement of Electromagnetic Emissions, 150 kHz to 1 GHz - Part 6: Measurement of conducted emissions - Magnetic probe method." The Final Draft International Standard has the following voting period: 2007-11-30 to 2008-02-01. Purchasers of this draft version will receive the definitive version once it … [Read more...]
IEC Issues Draft of Amendment on Limits for Harmonic Current Emissions
IEC 61000-3-2 am1 Ed. 3.0 (2007-11) is entitled "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current of less than, or approximately, 16 A per phase)." The Final Draft International Standard has the following voting period: 2007-11-30 to 2008-02-01. Purchasers of this draft version will receive … [Read more...]
IEC Issues Technical Report on EMC Testing of Metallic Communication Cables
IEC 62153-2-1 Ed. 1.0 (2007-11) is a 52-page Technical Report from the International Electrotechnical Commission (IEC) entitled "Metallic communication cable test methods - Part 4-1: Electromagnetic compatibility (EMC) - screening measurements." It gives a brief introduction to basic concepts and terms that reveal the common features of test methods. For more … [Read more...]
Investigators Rule Out EMI in Investigation of Boeing Crash Landing at Heathrow
Since the crash landing of a Boeing 777 returning from Beijing to London's Heathrow Airport on January 17, 2008, speculation and the rumor bill have looked for an explanation as to what caused a crash landing on a grassy area short of the runway after a seemingly normal flight. One persistent version blamed electromagnetic interference from the many WiFi systems in densely … [Read more...]
New Standard on Electrical Installation Safety & Protection Against Voltage and EM Disturbances
The International Electrotechnical Commission (IEC) has issued IEC 60364-4-44 Ed. 2.0 (2007-08) entitled "Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances." The rules of this part of IEC 60364 are intended to provide requirements for the safety of electrical installations … [Read more...]
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