Author Topic: EMC Standards  (Read 1005 times)

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Offline PixieDustTopic starter

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EMC Standards
« on: April 26, 2020, 08:00:58 am »
I'm currently reading about EMC standards, ACMA/FCC/CE compliance. I'm just looking at the description of "AS/NZS 61000.6.3-2012" haven't bought it yet. It says:

"Adopts IEC 61000-6-3, Ed.2.1 to specify emission requirements in the frequency range 0 Hz to 400 GHz for electrical and electronic apparatus intended for use in residential, commercial and light-industrial environments."

Seems pointless even buying it for me given that the frequency range goes to 400Ghz! I haven't looked, but I'm sure a spectrum analyser with that kind of bandwidth would cost as much as a house. Can anyone shed some light on this? How can a standard intended for the broadest category of consumer goods require testing to such high frequencies? It would make most useless trinkets economically nonviable to develop, yet there's so much stuff on the market. Confused!
 

Offline OwO

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Re: EMC Standards
« Reply #1 on: April 26, 2020, 08:09:35 am »
The frequency you are required to test up to is some multiple of the highest clock or RF frequency used in your design. The standard has to go up to 400GHz to define requirements for <100GHz ISM band applications.
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Offline PixieDustTopic starter

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Re: EMC Standards
« Reply #2 on: April 26, 2020, 08:34:11 am »
And why are there multiple applicable standards next to some categories? Do you need to comply with all, or does compliance with one suffice?
 

Offline PixieDustTopic starter

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Re: EMC Standards
« Reply #3 on: April 28, 2020, 10:58:41 am »
And why are there multiple applicable standards next to some categories? Do you need to comply with all, or does compliance with one suffice?

Ah, found this https://www.compeng.com.au/wp-content/uploads/2014/10/ACMA_C-Tick_booklet.pdf:

Quote
The ACMA recognises European Norm (EN), International Electrotechnical
Commission (IEC), International Special Committee on Radio Interference (CISPR)
and Australian/New Zealand standards (AS/NZS) as listed on the ACMA website.

This raises a question. I haven't checked the requirements in Europe or USA yet, but at least in Australia, you basically can sell a product if it complies with these other standards i.e. if it just has an FCC sticker if it's coming from America etc? Why are there multiple jurisdiction certifications available by EMC Compliance testing facilities if at least in Australia, it seems to accept multiple certificates?

Also, the following:

Quote
Other EMC phenomena such as immunity, electrostatic discharge (ESD), harmonics,
flicker and voltage fluctuations on mains power supply are not mandated by the
ACMA.
Immunity standards are not mandatory under the Australian EMC regulatory
arrangements. However, manufacturers are encouraged to consider immunity during
their device design, especially if they are planning to export devices, as there may be
a requirement in overseas countries.

This is quite interesting, immunity isn't a requirement! At least for what I'm planning to make.
« Last Edit: April 28, 2020, 11:04:49 am by PixieDust »
 

Offline Neilm

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Re: EMC Standards
« Reply #4 on: April 28, 2020, 07:08:48 pm »
Selling into Europe you will need to look at the the standard that is applicable to your product. For instance test and measurement equipment requires meeting IEC 61326. That specifies the frequency range ithe unit has to meet for emissions and what immunity testing is required - it variy depending on the product and where it is used.

For EMC you may have to meet either the EMC directive or the Radio Equipment Directive (if you have a transmitter in the unit). It would also have to meet the Low Voltage Directive for safety as the CE mark covers both.  Depending on your product you may have to meet other directives - those are the ones I am immediately familar with.
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