Are there alternate medical equipment EMC standards (i.e., 60601-x series) that
would give you more leeway?
Mike Sherman
Graco Inc.
Product Safety and Compliance Engineer
- Original Message -
From: Niels Hougaard n...@bolls.dk
To: EMC-PSTC EMC-PSTC@LISTSERV.IEEE.ORG
Sent:
Experts,
EN 60825-1:2007 is currently listed to the LVD as providing presumption of
conformity.
I was expecting to find, but do not see, an Annex in EN 60825-1:2007 stating
which LVD essential requirements it addresses.
EN 60825-1:2014 is published but is not yet listed to the LVD. It also
For the power supplies that are certified by UL under category code QQGQ2,
UL does have a standardized table format on their online cert directory
that includes a code they call the Output Category. The intent is to
identify those supplies that have been evaluated for SELV output, or other
types
Mr. Nute's response is significant and is worthy of re-emphasis.
And Mr. Woodgate answered this same question to Mr. Nyffenegger previously:
The power supply as a whole cannot claim that unless ALL its outputs
meet the SELV requirements. But it does meet the requirements for safety
Have to disagree with Doug, and do so with some trepidation.
The original LISN was a 5 uH model designed for use on 28 Vdc power modeling
an aircraft power-distribution system. Typical application was in a shield
room utilizing filtered power, or at least a dedicated 28 Vdc power supply,
so I
Remember that the LISN started out in the pre-semiconductor age, so LISN
transients were much less of a danger. My major concern in using LISN's was
that I was usually testing large military systems, and the test specimens
were often rather buggy when they reached my lab. Unexpected modes and
Note MIL-STD-461 requires a 20 dB pad at the LISN port. With a minimum
limit of 60 dBuV compared to the old FCC 48 dBuV, that works out fine.
Ken Javor
Phone: (256) 650-5261
From: Ed Price edpr...@cox.net
Reply-To: Ed Price edpr...@cox.net
Date: Tue, 20 Jan 2015 18:00:53 -0800
To:
I would agree as well.
However, it is possible to put heavy filtering (capacitive) ahead of the
LISN on the utility side to help absorb transients of external origin. If
the EUT/DUT generates transients you could be in trouble. A simple 30 amp
three phase contactor can cause this very problem.
Hi All,
Here are some thoughts of mine on two examples of
design-by-committee in the EMC field which ended, in my opinion, a
poor outcome:
First, is the LISN (line impedance stabilization network),
used in conducted emissions testing. I cant believe that a
Dear all,
Please check below link. I must say I do not agree with last paragraph on page
7, since they do not consider internally generated high voltages. Even the
input is SELV, internally there might he high voltages generated and therefore
by having only functional insulation in-out, fault
On 1/20/2015 12:20 PM, Mike Sherman - Original Message - wrote:
Are there alternate medical equipment EMC standards (i.e., 60601-x
series) that would give you more leeway?
Said what I was thinking. It's for a medical use, yes? You said it MUST
use a particular frequency (which BTW
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