EMC Confidence Checking
06 Jan 2021
Author: Keith Armstrong
EMC Confidence Checking I was recently working with a manufacturer of stand-alone ticket machines, who had big problems with Ethernet-related emissions. Long story short – it wa...
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In our day to day business we come across many situations where we can provide solutions to EMC Problems, often just by giving some advice or guidance.
In our blog, we will pass on some of this hard won experience, with the hope that you may find the answer to an issue that you have been experiencing.
All the very best!
Keith Armstrong
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Happy Christmas from EMC Standards!
16 Dec 2020
Author: EMC Standards
All at EMC Standards would like to take this opportunity to wish you an enjoyable holiday period and a much improved 2021! It is possible that you may find yourself with some spa...
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What to do about BREXIT and UKCA marking
15 Dec 2020
Author: Keith Armstrong
What to do about BREXIT and UKCA marking Excellent guidance is provided by: https://www.gov.uk/guidance/placing-manufactured-goods-on-the-market-in-great-britain-from-1-january-20...
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Don't Rely on the Stability of the Mains Frequency
09 Nov 2020
Author: Keith Armstrong
Don't Rely on the Stability of the AC Mains Frequency! My old colleague and good friend Tim Williams sent me the story below for inclusion in EMI Stories/Banana Skins, and I found...
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Constructing I/O panels for shielded rooms
14 Oct 2020
Author: Keith Armstrong
Question: ‘We are building our own in-house DIY EMC test chamber for testing simple relative radiated measurements. We want to be able to see if certain design choices affect th...
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'Clean Earths' Aren't Clean! Or Earth!
01 Oct 2020
Author: Keith Armstrong
'Clean Earths' Aren't Clean! Or Earth! FACTS: All conductors have self-inductance and space-charge capacitance, which causes them to have self-impedances that vary with frequency...
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Getting Started with EMC
25 Aug 2020
Author: Keith Armstrong
Whenever I need to research something, the Internet is my first port of call, and the more you search, the more information you find! However, as we all know, the actual quality o...
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There are no low frequency systems any more!
11 Aug 2020
Author: Keith Armstrong
There are no low frequency systems any more Following on from my Blog “Ground / power bounce cause noise emissions from all IC pins”…. When we measure excessive emissions f...
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Keith has several Tutorial presentations in the IEEE EMC Society's virtual international symposium in August 2020
28 Jul 2020
Author: EMC Standards
Keith has several Tutorial presentations in the IEEE EMC Society’s virtual international symposium in August 2020 (which replaces the international EMC symposium planned for July...
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EMC Question for 400Hz Power System
11 May 2020
EMC Question for 400Hz Power System Question: I would appreciate it if you could provide your view / share your expertise on the EMC/EMI protection requirements between the 400...
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Risks associated with EMC and EMI - Don't get confused!
01 May 2020
Author: Keith Armstrong
Risks associated with EMC and EMI – don’t get confused! There are many kinds of risk For example: the risk of being late for an appointment; the risk of buying a lottery tick...
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How EMC is achieved in 199 words!
15 Apr 2020
Author: Keith Armstrong
How EMC1 is achieved, in 199 words! EM propagation2 creates all the voltages and currents we measure in our circuits and cables, as well as creating all the unwanted voltage and...
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Never believe any certificates or declarations
04 Mar 2020
Author: Keith Armstrong
Never believe any certificates or declarations Commercial-off-the-shelf (COTS) products, modules and components may be declared by their manufacturers as being compliant with safe...
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Functional Safety, Risk Management, EMC and EMI
01 Mar 2020
Author: Keith Armstrong
Functional Safety, Risk Management, EMC and EMI What is Functional Safety? The safety of products, systems and installations can be split into two parts: i) ‘Basic’ s...
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Ground / power bounce cause noise emissions from all IC pins
14 Feb 2020
Author: Keith Armstrong
Ground / power bounce cause noise emissions from all IC pins Ground and power bounce are often ignored as sources of CM noise emitted from all integrated circuit (IC) pins, even i...
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ESD testing needs to change to reflect real-life
21 Jan 2020
Author: Keith Armstrong
ESD testing needs to change to reflect real-life Semiconductor die shrinking means that 0.7ns risetimes are now too slow Electrostatic discharges in the real world cover a very w...
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Under the medical safety standard IEC 60601-1-2:2014 an EMC test lab is not required to assess or review any aspect of a Risk Management File.
08 Jan 2020
Author: Keith Armstrong
Under the medical safety standard IEC 60601-1-2:2014 an EMC test lab is not required to assess or review any aspect of a Risk Management File. IEC 60601-1-2:2014 is a medical ...
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Guest Article - High frequency harmonics and marine power quality.
02 Dec 2019
Author: Ian C Evans
High frequency harmonics and marine power quality - 20 Nov 2019 In this guest blog post, Ian C Evans, Principal Electrical Engineer, Harmonic Solutions Marine, a division of Sen...
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Guest Contributor section - New article added!
02 Dec 2019
We have added a contribution by Ian C Evans, in his article titled 'High frequency harmonics and marine power quality, Ian examines some of the issues associated with poor power qu...
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Mains harmonic current emissions are always bad - It is risky to rely on the limits or exclusions in the standards
18 Nov 2019
Author: Keith Armstrong
Mains harmonic current emissions are always bad It is risky to rely on the limits or exclusions in the standards Many (perhaps all) of EMC standards that are listed under the EMC...
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