Jim,
You have answered your own point. It doesn't matter if you raise the bar by
one notch or ten, at the end of the day you are still talking about liability
REDUCTION when it comes to meeting product safety standards.
As you say, shxx happens. Agreed, and this is one reason why reputable
Kevin,
I can't name a vendor, but I will try to help with some advices.
Probably all Ethernet hubs will show susceptibility during EFT, in which some
data packets will be lost. The EFT happens to have large spectral amplitudes
right in the middle of the 100 Base-T Ethernet signal
Goto http://www.vishay.com/load-cells/
Vishay has pretty much bought everyone that makes load cells. Tedea
Huntleigh is the most well known. As far as using them in a harsh
environment, the signals are differential with shielded cables. I know they
work quite well up to 10 or 20V/m, but I don't
John,
In my case, there does not seem to be any connection. While we have had high
humidity and temperatures outside, there has not been anything much over 85
degrees and/or 80% inside. The last episode of trips was around 68 degrees and
60%.
Scott
John Woodgate wrote:
I read in !emc-pstc
Good Members,
I'm having some issues getting together a decent test set up for immunity
testing when I have a network connection at 100 Base -T. I've had several
hubs in the lab but I can't get one to even pass level 1 EFT testing ( for
CE EMC testing) . Would any of you be able to recommend a
In a message dated 9/22/2003 1:10:21 PM Central Daylight Time,
tdonne...@act-sys.com writes:
Group,
I have an application where I need to load an actuator, and monitor the
load, during EMI testing. I have to meet DO-160D, and MIL-STD-461E, which
will include 200 V/m Radiated Susceptibility.
I read in !emc-pstc that Scott Douglas sdoug...@ptcnh.net wrote (in
3f6f2d9e.5070...@ptcnh.net) about 'GFI Question Follow-up' on Mon, 22
Sep 2003:
When I went to experiment, the shredder had not been tripping the GFI. I
gave up and about a week later it tripped 3 times in a row.
Is there any
-Original Message-
From: Ralph McDiarmid [ mailto:ralph.mcdiar...@xantrex.com]
Sent: Monday, September 22, 2003 11:12 AM
To: emc-p...@majordomo.ieee.org
Subject: RE: Arcing Sparking
I suggest that an arc is something continuous and producing light or
illumination. A spark
I read in !emc-pstc that Peter L. Tarver peter.tar...@sanmina-sci.com
wrote (in nebbkemlgllmjofmopleoehhelaa.peter.tar...@sanmina-sci.com)
about 'Arcing Sparking' on Mon, 22 Sep 2003:
I have always related arcing to having end-points: having at least two
electrodes and involving electrical
My understanding is that a spark is the result of an electric discharge
through ionized air. An arc actually contains vaporized metal from the
contacts and has phenomena like flash and blast that are not associated with
sparks.
Best regards,
Brian Epstein
Sr Regulatory Compliance Engineer
Veeco
Essentially, an arc is sustainable and a spark is not. A spark is the onset
of an arc. Whether it becomes sustainable or not, has to do with the supply
of charges and electric field potential.
An arc, once formed, becomes very low in resistance and impedance akin to a
metal conductor. The
I suggest that an arc is something continuous and producing light or
illumination. A spark is something abrupt and short lived.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: Speakman, Jim [mailto:jim.speak...@uk.thalesgroup.com]
Sent: September 22, 2003
I have always related arcing to having end-points: having at
least two electrodes and involving electrical conduction.
Arc \Arc\ ([aum]rk), v. i. [imp. p. p. {Arcked}
([aum]rkt); p. pr. vb. n. {Arcking}.] (Elec.) To form a
voltaic arc, as an electrical current in a broken or
disconnected
Group,
I have an application where I need to load an actuator, and monitor the
load, during EMI testing. I have to meet DO-160D, and MIL-STD-461E, which
will include 200 V/m Radiated Susceptibility.
Has anyone had experience using load cells in this environment? Any
suggestions on vendors?
This is totally my interpretation, not meant to be be authoritative. To me
a spark is an incandescent piece of matter, which can be incandescent for
any number of reasons, including but hardly limited to electrical - I have a
curtain in front of my fireplace to keep sparks from flying out and
Fellow Listees,
According to Merriam-Webster Online:
An arc is a sustained luminous discharge of electricity across a gap in
a circuit or between electrodes
whereas
A spark is a luminous disruptive electrical discharge of very short
duration between two
conductors separated by a gas (as
Hello Group,
A follow-up to my question why does my paper shredder trip the GFI
outlet. I received 7 responses to my original note. For that I thank you
all. The consensus seemed to indicate the shredder is noisy and probably
on the hairy edge of fault current. And, that adding some line cord
I have never seen a really definitive statement about arcs and sparks however I
tend to think of sparks as transient ( as in spark plugs) and arcs as sustained
(as in arc lamps). Does that make sense?
Fred Townsend
Speakman, Jim wrote:
Fellow Listers
At a recent equipment design review, a
Vic Gibling wrote
Was the man matching the assistants humour/sarcasms?
OR
Was he ignoring the warnings, it's not going to happen to him?
OR
Was he making a rational risk assessment based on the
information provided by the manufacturer?
I'm in California. I sometimes hear an anti-smoking
Fellow Listers
At a recent equipment design review, a discussion on arcing and sparking
indicated a lack of definitive knowledge of the difference between an 'arc'
and a 'spark'.
Is an 'arc', basically just a long 'spark'. If so, at what point
(precisely) does a 'spark' become an 'arc'?
Have
I read in !emc-pstc that Gibling, Vic vic.gibl...@e2vtechnologies.com
wrote (in 4f826f960057d4118ec3009027e245380946d...@whl17.eev.uk) about
'More profound than a joke' on Mon, 22 Sep 2003:
In the UK cigarette packaging includes a large information message
indicating the health risks associated
Were it not for the risks associated with passive smoking, I would say the
customer made a wise choice if he intents to consume the product himself. He
has chosen a brand who's associated risk (as stated on the product) cannot
affect *him* personally. :o)
IANASP (I am not a safety
In the UK cigarette packaging includes a large information message
indicating the health risks associated with using the product.
The following dialogue would have been funny had it not been true.
Could I have a packet of 20 cigarettes please?, the man asked.
What would you like? the
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