mZ4SobwAAAXOQwivOsnkHiTt2ByoCkOxVQjOGOjRlivicVgYlN1dz5QXjId9bpa0keWzfVxhl8KPj78uD6-S6nfqRsg&submissionId=e49e0dc0-96a3-2516-27fa-ee2e8c42b177>
> <https://twitter.com/ElementTesting/>
> <https://elementmaterials.eu.qualtrics.com/jfe/form/SV_3xQqm84s6IydI5D>
>
> *From:* Patrick
?
I’ve worked with EMC for tabletop equipment in different industries, but
this is my first time in the automotive industry. I'm anticipating a very
deep rabbit hole.
Thank you,
Patrick Lawler
-
This message is from the IEEE Pr
Hi Brian,
I wasn't aware of the 'Dia' software until Brent mentioned it. While
looking through the developers site, I saw there are additional symbol
packs already designed that may meet your needs:
http://dia-installer.de/shapes/index.html.en
Regards,
Patrick Lawler
On Thu, Ma
energy of a frequency in the range 45 Hz to 65 Hz and to
their type tests only. This publication supersedes IEC 60043 (1960), 60170
(1964) and 60280 (1968).
Patrick Lawler
plaw...@west.net
On Mon, 29 Apr 2002 10:55:57 -0400, Ned Devine wrote:
>I can help much, but, for this paragraph,
d mail to the list administrators:
> Ron Pickard: emc-p...@hypercom.com
> Dave Heald: davehe...@attbi.com
>
>For policy questions, send mail to:
> Richard Nute: ri...@ieee.org
> Jim Bacher: j.bac...@ieee.org
>
For those interested, there was an article in Compliance Engineering in November
1999 comparing CNS 13438:1997 to CISPR 22:1993. It also had some brief comments
on lab accreditation.
The article can be found on the web at
http://www.ce-mag.com/archive/1999/novdec/Lin.html
On Mon, 22 Apr 2002 1
r the audio range
(20Hz-20kHz)?
----
Patrick Lawler
plaw...@spamtrap.west.net
(remove spamtrap to reply)
remove spamtrap to reply
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Visit our w
tage protection. I found a link
>using Google that describes the problems [
>http://www.kalglo.com/powrline.htm ] but I'm looking for additional links to
>specifics or summaries if any one knows of such.
Patrick Lawler
plaw...@west.net
---
Th
I finally read the bottom of a recent posting, and saw that the EMC-PSTC
discussion forum is now available through a web page.
Many thanks to those who put it together!
Patrick Lawler
plaw...@west.net
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gizing for the email they received that does not concern them.
I finally found the menu option for this feature and turned it 'Off'!
Patrick Lawler
plaw...@west.net
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/~ear/prime.html
On Thu, 21 Feb 2002 19:24:56 +0200, Peter Merguerian
wrote:
>Can anyone help identify a laboratory testing to "Sanitary Standards for
>Level Sensing Devices for Dry Milk and Dry Milk Products, Number 50-00"?
----
Patrick Lawler
toxic, but I've never heard of metalic berylium (Be) posing a problem.
Patrick Lawler
plaw...@west.net
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hrough the Google newsgroup search at
http://www.google.com/grphp?hl=en
3) Also try
http://www.highdensitysolutions.com/hdsol/General/TechnicalPapers.html for
"Magnetic Components Modeling"
Patrick Lawler
plaw...@west.net
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Does operating frequency affect the issue?
If the radar system is in an official ISM frequency band, use CISPR 11, but if
operating outside the those bands treat is as an RTTE device?
Also, what about the market served? The original poster seems to have a
position with a military contractor. Do
In a recent posting, someone commented on the possiblity of 'flicker' emissions
(controlled by EN61000-3-3) causing a disturbance in 'victim' equipment.
Would EN61000-4-11 (Voltage dips, short interruptions and voltage variations) be
an immunity spec complement to EN61000-3-3? Or is EN61000-4-14
Sorry for the confusion - I should have started a new thread.
Let me try again.
On Fri, 11 Jan 2002 21:20:44 +, John Woodgate wrote:
>I read in !emc-pstc that Patrick Lawler wrote (in
>) about 'EN 50141 and EN
>61000-4-6', on Fri, 11 Jan 2002:
>>This is a more of
If CENELEC has updated a basic test standard (like IEC801-2 being replaced by
EN61000-4-2), but the product standard used for system EMC testing calls out the
old basic test standard number, which one do you use?
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If CENELEC has updated a basic test standard (like that described below), but
the product standard used for EMC testing (like EN50082-2) calls out the old
standard number, do you use the old standard or the new standard?
This is a more of a general question, since I would actually test to EN61000
I belive emissions standards were designed to allow proper operation of radios
and televisions with minimal irritation. This would include sound and video
quality. I heard this story a long time ago with respect to FCC limits.
On the other hand, immunity standards were developed so equipment wo
r are
there magnetic loop antennas for some of the test ranges?
I have a hard time imagining E-field measurements below 30MHz at a 3m distance.
Patrick Lawler
plaw...@west.net
On Fri, 21 Dec 2001 10:19:22 -0800, you wrote:
>The requirements for EMC of radio equipment in Russia (as we
I've had good results using ferrite cores. They help radiated emissions as
well.
P.S.: I was surprised to see your location. I'll be coming to your city for the
first time on Saturday. This visit caused me to ask the question concerning
snow on OATS sites.
On Wed, 12 Dec 2001 21:50:35 +0100,
I saw some photographs of an enclosed OATS facility in an area subject to snow.
How does snow accumulation on the roof affect performance measurements? Does it
affect the NSA figures?
Is the effect significant enough that attempts are made to keep the roof snow
free? Or does the normal attempt
Are you saying that the results of a 'tuning' style measurement sequence are
different than a 'stepping' style measurement sequence?
On a slightly different note:
The HP 8591EM has the capability of log frequency sweeps without the use of an
external controller. I looked at the X-axis output dri
It would help if you said what the item was that had the symbol.
The german company Wickmann also has a symbol consisting of the letter W in a
circle. They make fuses, fuseholders, and other circuit protection devices.
> Subject: Who or what is W letter in a circle
> Date: Mon, 10 Dec 2001 15:3
r the rectifier), and using a
grounded source at the LISN input degraded its performance.
Patrick Lawler
plaw...@west.net
On Thu, 29 Nov 2001 17:43:35 +, John Woodgate wrote:
>I read in !emc-pstc that Peters, Michael wrote
>(in <61c1e83d9da9d311a871009027d617f001632...@peaexch
This sounds similar to the radiated emissions tests following EN55014-1:1997
(emissions for household appliances). The unit of measure is also dBpW.
An absorbing clamp is placed on the AC power cord, and moved along the cord
looking for maximum emissions. A table of correction factors converts
Our company manufactures switching power supplies to EN60950 and EN60601-1
standards, and our safety group looks for these issues.
In fact, I got 'bit' by that same problem last week. Spacing was OK when the
PWB was mounted in the chassis, but when the cover was installed, it failed
primary-groun
The power supply was probably not designed to _filter_ EFT signals, which can
range up to 50MHz. Since power supplies are typically low frequency devices (as
compared to 50MHz signals), it make sense that it was unaffected.
Try using high frequency ferrite cores on the AC and DC lines. The core
If product specifications for the LVD are not harmonized when announced in the
OJ, when _are_ they harmonized?
On Wed, 3 Oct 2001 08:24:18 -0400 , wo...@sensormatic.com wrote:
>Trevor, the new product specification must be applied by the "date of
>withdrawal (DOW)" that can be found in the new st
x27;t.
Would _you_ redesign your system if it failed?
Patrick Lawler
plaw...@west.net
On Mon, 1 Oct 2001 08:02:10 -0600 , "Aschenberg, Mat"
wrote:
>Since all of you have your ESD hats on.
>
>Are there standards for testing of components on a pwb? There is some
>con
ems, and is not really a forum.
Patrick Lawler
plaw...@west.net
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I don't have the IEC 61000-4-2 ammendment, but CISPR24:1997
(Immunity for ITE) does have the phrases
"... a minimum of 50 discharges at each point",
and
"... test points shall receive at least 50 direct contact
discharges."
Maybe this is what you were thinking about
The following doesn't directly address the issue of product
robustness, but I'll pass it along anyway.
My company makes power supplies for use in medical equipment, and
some of our customers test to IEC60601-2-24 (safety & EMC for
medical infusion pumps). This standard requires 15kV air
discharge
I've also seen this effect when testing component power supplies
(off-line switch-mode converters, 50-500W).
The problem became apparent when a customer added another EMI
filter ahead of our power supply, creating a system we didn't
anticipate. The power supply alone passed the test, but the
add
You should probably include the Philippines on the list as well.
I've heard anecdotal stories about people bringing their US appliances
to the Philippines, only to have them burn out when they plugged the
cord into the 216VAC NEMA wall socket.
Apparently, a common solution is to use a step-down tr
Our company makes open frame linear and switch-mode component power
supplies in the range of 5-500W. Applications include industrial, and
medical equipment.
The sales distributor we use in Australia has contacted us asking for
EMC documentation to support C-Tick marking of our products, as
requ
Does anyone have a copy of the EN61000-3-3 Millenium Ammendment they
would be willing to share?
On Fri, 2 Mar 2001 08:22:08 +, John Woodgate
wrote:
>I don't suppose you have the big 'Millennium' amendment to the standard,
>which STILL isn't published yet? Even though (actually, 'because') i
I think it was http://parts.lvctechnology.com/
Patrick Lawler
plaw...@west.net
On Mon, 5 Feb 2001 17:16:38 -0500 , "Veit, Andy"
wrote:
>I hope someone will be kind enough to help me.
>A while back, someone posted a link to a vendor of used test equipment. The
>vendor al
ment 14, there is no evaluation of the
>input current waveform to determine the test limit. The application
>alone will determine the test limit used.
>
>
>Patrick Lawler
>plaw...@west.net
>
>
>On Tue, 12 Dec 2000 10:03:50 +1100, Jon Keeble
> wrote:
>>You may
e 1 of the standard.
This enabled you to use the less-stringent Class A limits.
With the incorporation of Ammendment 14, there is no evaluation of the
input current waveform to determine the test limit. The application
alone will determine the test limit used.
----
Patrick Lawler
plaw...@west.net
procedure specified in section 18.311 (MP-5) gives a
graph of LISN performance that only goes down to 150kHz.
Am I missing something, or is this the way the regulations read?
----
Patrick Lawler
plaw...@west.net
---
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the web, and found some interesting background on that
unit of measurement:
http://www.ki.se/onkpat/radfys/sievert/Sievert.html
Patrick Lawler
plaw...@west.net
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drops.
I also have a copy of IEC1000-4-11:1994, which has a reference to a UNIPEDE
study conducted in 1991. I'm looking into that now.
Any suggestions?
Patrick Lawler
plaw...@west.net
---
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On Thu, 12 Oct 2000 13:22:30 EDT, lfresea...@aol.com wrote:
>does anyone have a SPICE model for an MOV?
>
>Thanks,
>Derek.
Take a look at the models offered by Intusoft
http://www.intusoft.com/Models.htm , and look for the 'Varistors' link.
Also try Littelfuse. They now own the Harris/GE varist
I was at the CENELEC web site http://www.cenelec.org/ looking for a
reference to the current version of EN61010-1 (Safety for lab equipment),
and found confusing information.
The results of the search gave a CENELEC reference that said that
EN61010-1:1993/A2:1995 had a DOW of 1996-04-01. I take
Good grief. We haven't reached the DOW of the EN50082-1:1998, and already
they're discussing replacing it!
On Wed, 20 Sep 2000 11:10:18 -0400, wo...@sensormatic.com wrote:
>A new generic immunity standard for residential, commercial and light
>industrial equipment is in voting stage. DOW is prop
I was reviewing the voltage dip/interrupt requirements of BS
EN61000-6-2:1999, and noticed that one test condition is a 60% dip for 5
periods (0.1s at 50 Hz), while another is 60% for 50 periods (1s at 50Hz).
Both tests require Performance Criteria C.
- Wouldn't a single test at 50 periods cover
Do these standards (50204 & 61000-4-3)represent the same test?
I thought ENV50140 was the predecessor to IEC801-3/61000-4-3.
CENELEC describes ENC50204 as 'Radiated electromagnetic field from digital
radio telephones', with the scope being:
'The standard relates to the immunity of electrical and
Raymond:
The web site information only gives reference to the document (verifies the
document number and the subject matter), but like many standards today, it's
probably copyrighted and needs to be purchased.
To All:
Are 'Harmonized Documents' available through normal standards services (like
0Vac and the products have to be taken care the safety at 240Vac. Can anyone
>tell me where I can find a copy of this memo and if there is any updated
>version
>to replace this one.
>
>Thanks and regards,
>
>Raymond Li
>Dixons Asia Ltd.
Patrick Lawler
plaw...@west.net
his than to build my own modulator?
>
>Thanks,
>
>Jeff Bailey
>Compliance Engineering
>SST - A Division of Woodhead Canada
>Phone: (519) 725 5136 ext. 363
>Fax: (519) 725 1515
>Email: jbai...@sstech.on.ca
>Web: www.sstech.on.ca
Patrick Lawler
plaw...@west.ne
I follow EMC issues on several mailing lists. However, I haven't
looked into web-based forums.
Does anyone have any favorite sites for EMC discussions?
Patrick Lawler
plaw...@west.net
---
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oftware, so it must be cheaper than $3.000
>
>Best regards,
>Kim Boll Jensen
Patrick Lawler
plaw...@west.net
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There is no surge (IEC 61000-4-5) requirement in EN 50082-1:1992.
The only AC port test is EFT/Burst, at a test level of 1 kV.
On Fri, 30 Jun 2000 10:09:14 -0400, you wrote:
>Here is an EMC related question. What did the EN 50082-1 standard dated
>1992, (not the 1997 version), specify regarding
perseded, and when you had to stop using the superseded standard (to
claim compliance to the EMC Directive).
Corrections from list members appreciated.
Patrick Lawler
plaw...@west.net
-Original Message-
From: don_macart...@selinc.com
Sent: Monday, June 19, 2000 1:07 PM
To: emc-p...@majo
someone point me to the appropriate section?
Patrick Lawler
plaw...@west.net
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to be addressed or if testing
>is a matter of choice.
>
>Thank you in advance for your help
>
>Cyril A. Binnom Jr.
>EMI/EMC Approvals Engineer
>(770) 447-4224 Ext.3240
>(770) 447-6928 Fax
>e-mail binno...@lxe.com
>
>Visit Our Websi
;For policy questions, send mail to:
> Richard Nute: ri...@ieee.org
>
>
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+55.48.234.5422
>e-mail: hari.m...@inep.ufsc.br/Internet:www.inep.ufsc.br
Patrick Lawler
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1m by 1m
>ground plane as our ground plane is 36 inches by 6 feet.
Patrick Lawler
plaw...@west.net
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ield uniformity
measurements in chambers. Is this procedure an issue for GTEMs?
----
Patrick Lawler
plaw...@west.net
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I think ENV 50141 was the only approved standard (of this type)
available in March 1995 (when EN 50082-2:1995 was published).
EN 50082-2 is being replaced by EN 61000-6-2:1999 (DOP 2000-1-1, DOW
2002-4-1). Although I don't have a copy, I assume it references the
newer EN61000-4-6 test standard.
Interesting that this would come up.
I just read an article in Medical Device & Diagnostic Industry
magazine that discusses the fields generated by anti-theft systems.
You can see it at
http://www.devicelink.com/mddi/archive/00/01/016.html
On Tue, 21 Mar 2000 08:45:12 + (GMT), tim.hay...@ge
As an excerise, I tried to find the directive that this standard was
harmonized under.
I looked on the Europa site under the EMC, Medical Device, and Active
Implantable Medical Device directives to no avail.
http://europa.eu.int/comm/enterprise/newapproach/standardization/harmstds/reflist.html
Is
On Tue, 14 Mar 2000 17:02:52 -0500, geor...@lexmark.com wrote:
>CBS has used their well honed voting models to analyze the early
>election returns. With less than 1% of the votes counted, and the
>Far East results not yet in, Dan Rather has declared a "non-split"
>forum the clear winner by a wide
On Fri, 10 Mar 2000 15:34:39 -0800, wrote:
>If this is becoming an issue, I would like to recommend that the Subject
>header in the e-mail be preceded by either "EMC:" or "SAF:" followed by the
>subject.This way, persons not interested in one or the other could
>easily delete the message with
>From MIL-STD-285 Notice 1:
"MIL-STD-285, dated 25 June 1956, is hereby canceled. The preparing
activity for this document has determined that IEEE-STD-299 is a
suitable replacement for this standard.
Users are cautioned to evaluate this document for their particular
application before citing it
Would it be appropriate to apply the TCF approach (EMC Direcitve
definition) for your compliance statement?
Exerpted from Article 10:
"2. In the case of apparatus for which the manufacturer has not
applied, or has applied only in part, the standards referred to in
^^
Concerning putting your rack-mounted equipment an additional 0.8m
above the floor:
Clause 7.2 also says that this arrangement must be safe. If the 0.8m
support is too small in area, the test setup would violate this
requirement.
The clause also says that this setup may be done if specifically
re
California Instruments has products that meet that requirement.
Although the generator we bought 3-4 years ago didn't meet the 5us
spec, they later introduced an accessory box that make the generator
system compliant.
Maybe that feature has been designed-in by now.
On Mon, 24 Jan 2000 16:11:28 -0
The performance & construction of the LISN is documented in CISPR
16-1. The line cord is not part of the discussion.
Your test standard (BS EN 55022) specifies the setup and AC mains cord
length.
To complicate matters, EN50022 doesn't _exactly_ call out an 1 meter
AC cord. Paraphased it says:
able along
with the PC and monitor.
I contend that the typical application has the foot pedal on the
floor, and the test setup should follow the typical application.
Comments?
On a similar note, should the test setup for Conducted & Radiated
Immunity follow the Emissions setup?
--
Patri
sic and product standards that would apply to the LV and R&TTE
>Directives.
>
>There are no worker limits promulgated at the EU level.
>
>Which leads me to my question. When would this new interpretation of the
>essential requirement take effect - now or the DOW of the associa
d the radiation levels for any other
>emmitig devices, machinery, GSM antennae, power cables, etc. The more
>information the better.
>
>David - The V/m guy
--
Patrick Lawler
plaw...@west.net
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les of thumb" or a "quick and dirty" means of determining
>whether conducted emission noise (or radiated) is common mode or
>differential mode?
>
>Thanks and have a great new year.
>
>Bob Heller
>3M Company
--
Patrick Lawler
plaw...@west.net
-
This message
1 and
> 7/1/2001. Thank you.
>
> Happy New Year!
>
> Regards,
>
> Lisa
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may not be published in time for a listing in the OJ in time for 1 Jan
>2001. The four year reduction to 50 W may not survive into the later
>edition, or it may be revised subsequently. In view of the ban on
>"certification clauses" (... previous standard may be used unt
& RELAY STSTEMS
Can someone recommend vendors of test equipment or test labs in Southern
California?
How does this test differ from the IEC 61000-4-4 fast transient test done on
end-user equipment?
Thanks,
--
Patrick Lawler
plaw...@west.net
-
This message is coming from the emc-
s, but couldn't come up with a test setup I
was satisfied with.
--
Patrick Lawler
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with the single line: "unsubscribe emc-pstc" (without th
ne has any experience with this type of
>problem or has worked with the Ametek blower? Any suggestions would be
>greatly appreciated.
>
>Ray Levasseur
>EMC Compliance
>Creo Products
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Patrick Lawler
plaw...@west.net
-
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lane is
>justified by eliminating the coupling of "dirty ground" to other circuits in
>an overlap situation.
>
>I would like to hear what you do for pcb grounding and why you do it.
>
>Don Umbdenstock
>Sensormatic
--
Patrick Lawler
plaw...@west.net
-
This mess
in this matter.
>
>mit freundlichen Gruessen/ best regards
>Volker Gasse
>
>IBM Germany, Technical Relations/Product Safety,
>Tel: +49-7031-16-6796, Fax: -6916, e-mail: ga...@de.ibm.com
>Mail: D3114/7103-91, D-70548 Stuttgart, Germany
--
Patrick Lawler
plaw...@west.net
--
Do any of you know where I can find a 1 1/4" fuse, that meets IEC 127 (EN
>60127)?
--
Patrick Lawler
plaw...@west.net
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nd I'd like to talk
>with someone who still has one.
>
>Also looking for an 8590A Service Manual (or someone willing to loan one
>for a couple of days while I make a copy). I'd pay roundtrip Fed-X,
>naturally.
>
>Thanks for the opportunity to post!
>
>Jim Eri
the E7400 series
instead of the 8590 instruments.
I've been using the 8591EM for several years now with good results. We're
going to buy another analyzer, and it will probably be an E7401A.
Unfortunately, it's taken me over 3 months just to get a demo unit. It should
be here any d
and if there are resonances,
>> etc.
>> Several options have crossed my mind, including adding a tracking
>> generator to my spectrum analyzer, buying an impedance analyzer, using
>> a
>> network analyzer, etc.
>>
>> I'd appreciate any experiences
with the single line: "unsubscribe emc-pstc" (without the
>quotes). For help, send mail to ed.pr...@cubic.com,
>jim_bac...@monarch.com, ri...@sdd.hp.com, or
>roger.volgst...@compaq.com (the list administrators).
>
>
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plaw...@west.net
-
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eryone: I don't want
>to offend anyone.
Well, at least you told us beforehand. Considered us warned.
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with the single
vance,
>>Moshe
>>
>>Name: moshe valdman
>>E-mail: mvald...@netvision.net.il
>>Phone: 972-54-881334
>>Telefax: 972-3-5496369
>>Date: 29/6/99
>>Time: 0:08:41
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Patrick Lawler
plaw...@west.net
-
This messa
it was controlling an overhead
crane).
What are the problems or issues addressed by EN55024 that were not covered by
EN50082-1?
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around the corner, and
>that edition _does_ call out the harmonic test. However, I've been told
>that
>it may not take effect until 2003.
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hat the harmonic standard does not apply to this system
>> >when
>> >it becomes mandatory in 2001?
>> >
>> >
>> >I realize the Second Edition of IEC60601-1-2 is just around the corner, and
>> >that edition _does_ call out the harmonic test. How
t the harmonic standard does not apply to this system when
it becomes mandatory in 2001?
I realize the Second Edition of IEC60601-1-2 is just around the corner, and
that edition _does_ call out the harmonic test. However, I've been told that
it may not take effect until 2003.
--
Patrick L
t the limits _and_ the design of the LISN. Does this mean they
accommodated the LISN attenuation when the limits were set?
--
Patrick Lawler
plaw...@west.net
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On Wed, 28 Apr 1999 11:14:38 -0500, Patrick Lawler wrote:
>At 04:21 PM 4/27/99 GMT, Robert Bonsen wrote:
>>My company is planning to purchase a screen room for radiated emissions
>>precompliance testing.
>>
>>I'm aware that reflections can cause resonances and drasti
Subject: Characterizing a screen room
>
> My company is planning to purchase a screen room for radiated
>emissions
> precompliance testing.
>
> I'm aware that reflections can cause resonances and drastically
>influence
> readings. Wha
My company is planning to purchase a screen room for radiated emissions
precompliance testing.
I'm aware that reflections can cause resonances and drastically influence
readings. What kind of testing could I do to characterize the room (aside from
simple experience)?
--
Patrick Lawler
positive and
negative low amplitude voltage fluctuations. Only conducted phenomena are
considered, including immunity tests for equipment connected to public and
industrial power supply networks.
Has the status of a Basic EMC publication.
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Patrick Lawler
plaw...@west.net
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This message
I just found out that IEC61000-4-2 (ESD immunity) has it's first amendment.
What changes does it have?
Thanks,
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Patrick Lawler
plaw...@west.net
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ble to point me to any resources where I can learn more?
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Patrick Lawler
plaw...@west.net
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