George,
I think your reasoning is convincing to me. Thanks.
But please allow me to pose a silly question: Are we really sure those
kinds of shaking coins interferences can be categorized as ESD
(Electrostatic Discharge) problem?
In your experience, for instance, the screw driver did not carry
Dear Laura,
Yes, you are correct.
You must start the test at the zero cross points (0 and 180).
Best regards,
Tetsuya Hashimoto
A-pex International Co.,Ltd.
2nd EMC Division Yokowa Lab
E-mail: has...@a-pex.co.jp
Hello Everyone,
While reviewing the new EN 61326 standard I noticed that the
Do you get the same effect with the coins in a cloth bag or a paper bag?
Has anybody tried it?
Lou
At 10:57 AM 3/15/99 -0600, you wrote:
Douglas,
I have seen similar events in a different way. Years ago, I helped design
an electronic system using plastic chassis with nickel surface plating.
Posted for Carl Newton cwnew...@xycom.com:
From: cnew...@xycom.com
Subject: EN 50021 and the EX Mark
Date: Mon, 15 Mar 1999 15:26:53 -0500
To: emc-p...@majordomo.ieee.org
Regarding Zone 2 Hazardous Locations compliance in the EU:
My understanding is
UL has informed me that they have signed a MOU with IRAM. IRAM will accept
test results from UL where UL has demonstrated experience with IEC
standards, such as IEC 950. IRAM will even issue their mark based upon those
tests. As an option for Phase II only, IRAM will accept products that bear
the
I have a low frequency control port that has a high frequency (300 MHz)
common mode harmonic noise on all three lines. This is on an existing card
with a limited amount of real-estate available. To compound the problems I
am driving a unique, off-the-shelf, device with no provisions for proper
We might have to correct a misconception of triboeletrification that we
learnt from all demonstrations in schools. The myth is triboeletrification
only happens to insulators.
Can we try to say: Triboeletrification would cause transfer of electrons
between different materials. Insulators would
Hello All,
Just had a short emailversation with Dick Pittenger regarding his response
(enclosed below). We both agreed that while his response may be true in
the Consumer Product world, it is not correct with respect to the
Workplace (under OSHA's control); And that happens to be where Mr.
Hello Brian:
Concerning your questions about the requirement for UL Listing/CSA
Certification for electrical equipment used in the USA and Canada, here's
my two cent's worth (this is based on 20+ years of handling submittals to
both agencies):
For the USA, NFPA 70 (the National Electrical
Hi Brian,
Whizzy, eh? Well, I think that most of us resemble that remark. :-)
First, UL and CSA are but two of the 17 NRTLs that are accredited by the
Occupational Safety and Health Adminstration (OSHA) which is a part of the US
Department of Labor.
Anyway, according to OSHA
Hello All,
I am about to purchase a notebook (support equip.) computer for use in
Emi / immunity testing of our (ITE) equipment.
I have no experience with notebooks (in Emi testing) and am looking for
your opinions on which manufacturer(s) are quiet performers for this
application.
Thank You,
---Lou Gnecco l...@tempest-inc.com wrote:
Do you get the same effect with the coins in a cloth bag or a paper
bag?
Has anybody tried it?
Lou
To answer that, there are two parts;
1) Look at the triboelectric series chart. This chart, shows, what
materials when rubbed with what other
According to this site, the MRA process is being delayed.
http://www.cix.co.uk/~approval/n2_0199.htm
http://www.cix.co.uk/~approval/n2_0199.htm
--
From: Leafloor, Bob: DSI [SMTP:leafloor@ic.gc.ca]
Sent: Tuesday, March 16, 1999 8:11 AM
To:
Hello Group,
Sorry to bother you with this one, but I am having a bit of a problem
connecting with a service person for Cincinnati Sub-Zero. My tech has
placed several calls and was told that someone would get back to us..
but it's been over a week.. we're still trying and still no call back.
The
The explosive atmospheres directive (ATEX) 94/9/EC is in force, but not
mandatory until 30 June 2003. You are correct in stating that there are no
standards published in the OJ yet, but that will occur soon.
Also, prEN 50 021 is due to be published any day now as EN 50 021.
By 'EX', I assume
Hi Everybody
Can some of you Whizzy American Engineers
provide me with some information.
The word on this side of the Atlantic is that if Equipment is not
UL/CSA approved. It MUST be field labelled.
Can anyone confirm this please
Regards
Brian Harlowe
* opinions
I remember a similar effect. Many years ago, when I was a student, in my
room I had a TV set with a simple loop antenna. 2 meters away from the
antenna was the radiator of the central heating of that house. On seams of
the elements of that radiator the paint had come off. Below the paint the
Regards,
Gert Gremmen Ing.
== Ce-test, Qualified testing ==
Consultants in EMC, Electrical safety and Telecommunication
Compliance tests for European standards and ce-marking
Member of NEC/IEC voting committee for EMC.
Our Web presence: http://www.cetest.nl
List of current harmonized standards
Chris,
about safety, if you look at EN 60065 (IEC 60065), you'll see that any
loudspeaker is included, regardless of its input voltage. Of course,
most of the tests are not applicable to those devices.
However, only loudspeakers using voltage higher than 50 V AC or 75 V DC
are affected by LVD.
Barry,
Your question is very much justified. I use the word ESD because in my mind,
I
play the image of the striking screw driver in slow motion. If you imagine the
nickel surface robs the
screw driver of its electrons to charge up the screw driver, then the electric
field builds up as the
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