Greeting colleagues,
In IEC 61000-4-8, Table 4 (see below), are there any tolerance values
specified for the Current values for coils to achieve the specific Level,
for example, +/-30% of 1.15 or +/-3dB of 1.15? I did not see any guidance as
to the tolerances that might be applied to Table 4.
The UK can and will recognize the CE Mark after Brexit (if and when),
but British manufactures will not be allowed to put it on their
products, because it is 'Conformité Européen'.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
Andy answered my question in posting the reference:
Products that have undergone the complete process of manufacturing and
conformity assessment (i.e. which are ready for placing on the market) can
still be placed on the UK market with a CE Marking after 29 March 2019.
Rich
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I suspect that only applies during the 'transition period', simply to
avoid an instant change in the requirements. If it were a permanent
arrangement, no 'UK Mark' would ever be required.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh,
Simple answer – because the requirements of the EU are all necessarily the
requirements of other regimes. CE shows an assumption of compliance to EU, it
does not show or assume compliance to any other regime unless that regime has
identical requirements or unless that regime is willing to
Dear Colleagues
In our Concord (suburb north of Toronto, Canada) location we have an opening
for a product safety specialist for our small A2LA accredited product safety
laboratory.
We are looking not only for someone who is familiar with testing to EN/IEC
60950 and IEC 62368 but equally
Ops should be “…the requirements of the EU are NOT all necessarily….”
Dennis Ward
This communication and its attachements contain information from PCTEST
Engineering Laboratory, Inc., and is intended for the exclusive use of the
recipient(s) named above. It may contain information that is
Reference CISPR11/EN55011:2016 version.
If you are an expert at the Radiated Emissions test from 150Khz -30Mhz for
Class A Group 2 equipment, I could really use your help.
I haven't done this test in over 25 years. I refurbished our Active Loop
antenna and placed it 10 meters from the EUT. I
This is an important issue. It's one thing for the UK to accept European
standards (ENs) /*as standards*, /but the European Court decision that
ENs are 'part of EU law' changes the picture considerably. If UK
continues to endorse ENs as BS ENs after the transition period, it is
accepting EU
Well, no it isn't. The definition of the decibel is based on power, and
is only extended to voltage and current by adding the assumption that
the resistance is constant. There is no formally-correct way of
extending it to resistance and even less to impedance. There is a fatal
flaw: Consider
Hi Andrew,
Your summarization of the changes was very helpful. The replacement of the
CE mark by a UK mark caught my attention. Are you aware of any
documentation released by the UK on what the new UK mark may look like?
Thank you
*Laura Stevens*
Sr. Compliance Engineer
2221 W Camden Road,
This applies to most standards - no tolerances. Instead, the measurement
uncertainty has to be estimated, and in some cases it must not exceed a
specified value.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-01-17 17:21,
* CE mark is replaced by UK mark.
Hmm. I wonder why the UK or any country can’t recognize the CE mark as
indicative of the relevant performance of the product?
Rich
-
This message is from the IEEE
You are making too much of it. If the limit is in terms of dBuA/m, you use
the loop magnetic field antenna factor, which is 51.5 dB less efficient than
the loop electric field antenna factor. Of course, this is based on a far
field assumption, and that is all you have available. But the
To fill in, that 51.5 dB = 375.84 numerically and comes from the
impedance of free space, 120*π = 376.99 ohms. which is actually 51.5266
expressed in 'decibels'. Actually, expressing an impedance in 'decibels'
is a illegal operation 'but it works, so why bother?'.
Best wishes
John Woodgate
It would be completely correct to say that the 51.5 dB factor is dB above
one ohm, which is the difference in magnetic and electric field units.
Ken Javor
Phone: (256) 650-5261
From: John Woodgate
Reply-To: John Woodgate
Date: Thu, 17 Jan 2019 22:11:50 +
To:
Subject: Re: [PSES] CISPR11
Just to clear up a bit of confusion (whilst staying well clear of politics)
The link given by Scott ie
Ian
I don't know if you have seen the guidelines on this page?
https://www.gov.uk/government/publications/trading-goods-regulated-under-the-new-approach-if-theres-no-brexit-deal/trading-goods-regulated-under-the-new-approach-if-theres-no-brexit-deal
Andy
From: McBurney, Ian
Sent: 16 January
The bottom line here is that the usual emission standards don't take
into account that the non-radiating near H-field falls off as the cube
of distance (an issue with BPL, remember) and the wave impedance in this
area is nowhere near 120 Ohms. Measuring at 3 meters using 51.5 dB as
a
And another answer, North America doesn’t recognize the CE mark, not only
because of standards differences but they don’t trust manufacturer
self-certification. They want certification by nationally recognized
independent labs, for US OSHA recognized.
-Dave
From: Dennis Ward
Andrew, Thanx for the pointer to this proposed comprehensive
Brexit update to the UK Legislation. This was a lot of work pulling this
together. Hopefully it will be used to provide a smooth transition from the
present CE marked equipment to the new UK marking.
Good day folks,
does anyone have a copy of this KDB they can forward please. I made the mistake
of relying on the US government to host the information.
Thanks,
Derek.
-
This message is from the IEEE Product Safety Engineering
Derek,
Try here: *http://tinyurl.com/y8lgbzmy
*Scott
On 1/17/2019 5:47 PM, DEREK WALTON wrote:
Good day folks,
does anyone have a copy of this KDB they can forward please. I made the mistake
of relying on the US government to host the information.
Thanks,
Derek.
-
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