An expanded line of IEC inlet filters from Schaffner EMC includes two new versatile models that offer up to 10 dB better attenuation than other versions in the series. The new FN9244 and FN9244E (with an integrated choke for additional EMI suppression on the earth line) offer a current rating of up to 15 A with an inductance up to 59.5 mH. These devices are well suited for use … [Read more...]
Life Enhancing Medical Products Achieve EMC Compliance
Surface cleanliness is critical to good coating adhesion for any coating process Rocky R. Arnold, Ph.D. WaveZero, Inc. Sunnyvale, CA Many medical product manufacturers achieve electromagnetic compliance (EMC) for their electronic devices by coating the inside of the plastic enclosures with a conductive material; for example, silver-copper particle loaded paint, electroplated … [Read more...]
ETSI Technical Report on EMC, Spectrum Use, and Implanted Medical Devices
The European Telecommunications Institute (ETSI) has issued ETSI TR 102 655 V1.1.1, which deals with electromagnetic compatibility and radio spectrum matters. This document defines new requirements for radio frequency spectrum usage for low-power active medical implants and their peripheral radio control systems. The report also proposes a concept that should permit a … [Read more...]
Reducing Ground Noise Emissions in Critical Electronic Equipment and Facility Ground Systems to Help Prevent Conducted EMI Problems
Many EMI problems involve emissions that circulate through electrical conductors within a facility and within equipment Philip F. Keebler and Kermit O. Phipps EPRI Knoxville, Tennessee Background The electromagnetic environment includes the areas inside and outside electrical and electronic equipment. The areas inside equipment include unused air spaces, circuit boards, cables … [Read more...]
Expanded Line of IEC Inlet Filters Comes in a Variety of Options
The new FN 9244 filters from Schaffner have expanded that company’s existing IEC filter inlet range. They are available in a variety of options and can be mounted in various ways. The line includes three attenuation classes: standard performance, high performance, and very high performance. All the new filters have been designed for a continuous operating voltage of 250 VAC, … [Read more...]
The IEC Advisory Committee on EMC (ACEC): Coordination of International EMC Standards
Since its formation, ACEC has developed a unique structure for EMC publications that is used to this day in the IEC and in other regional standardization organizations. While many EMC engineers are familiar with the electromagnetic compatibility (EMC) standards developed by the International Electrotechnical Commission (IEC), they are probably unaware of how the structure of … [Read more...]
Digi-Key and Schaffner EMC Announce Global Distribution Agreement
EMI/RFI component manufacturer, Schaffner EMC, and electronics distributor have announced that the two companies have entered into a global distribution agreement for the distribution of Schaffner’s full line of EMC and power quality products, such as chokes, filters, pulse transformers, and feed-through components. Schaffner’s products, now available on Digi-Key’s website, … [Read more...]
Improving the Way We Measure Insertion Loss
A proposed set of new test methods may provide more accurate attenuation data Kermit O. Phipps, Philip F. Keebler, Bradford R. Connatser Many commercial and industrial electrical environments contain equipment that is sensitive to radio-frequency (RF) interference. Theft detectors, digital sensors, and medical-telemetry systems have all been known to malfunction in the … [Read more...]
EMC in Space …
Successfully dealing with EMC in space systems requires strong EMC engineering Daryl Gerke, PE, and William Kimmel, PE Many of us in the EMC business came of age during the “space race” of the 1950s, 60s, and 70s. We well remember names like Sputnik, Mercury, Gemini, and of course, Apollo. Some of us in the EMC business have even been fortunate enough to spend some (or all) or … [Read more...]
Editorial in Medical Journal Calls for More Research on EMFs/Cell Phone/Brain Cancer Correlation
An editorial in the November issue of the journal Surgical Neurology has called for major immediate major research initiatives to assess the possibility that using cell phones leads to an increased risk of brain tumors. Dr. Ron Pawl, a neurosurgeon at Lake Forest Hospital in Lake Forest, IL calls for collaborative research initiatives to determine whether the risk between cell … [Read more...]
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