In Kansas there are no emissions laws or annual inspections.
The entire state gets a full air change every 10 minutes -so why bother?
We also benefit from no mandated vehicle inspections -ever. The only
thing that does get a check is the odometer and VIN, but only when a title
transfer occurs.
I have the 'dome' (well, my employer does).
Actually, it is an 8 meter dia. radome, white fiberglass throughout.
With door, HVAC and rotating floor that serves as ground plane.
We pipe in fibre optics for PC host to EUT control from a receiver
shelter located 50 meters perpendicular to the
...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Thursday, December 13, 2001 1:10 PM
To: keh...@lsil.com
Subject: RE: CFR 21 Sec. 11
The CFRs are online at
http://www.access.gpo.gov/nara/cfr/cfr-table-search.html
-Original Message-
From: Ehler, Kyle [mailto:keh...@lsil.com]
Sent: Thursday
Could someone explain to me or point in the right direction
for what CFR 21 Section 11 requirements in a product (such as
a disk storage system) for it to be compliant.
I think this is about records and electronic signature authentication
and has something to do with the FDA (CPG 7153.17). It
That looked like one of those old 'Mall' hand drills with the metal body.
They were known for excessive AC current leakage. Dont ask how I know...
Yowwp!
At least the guy's eyes will be in good condition for organ donation..
Kyle
-Original Message-
From: Robert Johnson
Since I have no experience with GTEMs just yet, I was wondering
if it was necessary to re-orient the EUT or the transducer to
'see' emissions, particularly those at Ghz that tend to be beam-like
and may require careful alignment to acquire the peak value.
Kyle Ehler
mailto:kyle.eh...@lsil.com
Chet, et al;
In the back of Volume 3 of the UL Recognized Component 'yellow books' there
is a large 'List of Company Identifications' section that has logos for
hundreds of companies. They are listed in alphabetic order (somewhat).
Raychem, Bourns and another vendor make these 'PTC' resettable
I agree provided there is no earthing conductor.
I thought the 2 meter cord length happens to meet earth fault requirements
as many cords are 3 conductor and the 60950 standard specifies the ground
conductor resistance to be less than 0.1 ohms as verified by test.
kyle
-Original Message-
I saw a kid use his bassoon like a Louisville Slugger once.
The competition for first chair was vicious in the woodwind section...
I played the cornet. A really old silver plated one.
Funny thing was it always had a terrible hall-filling halitosis.
-maybe that is why the conductor was always
Maybe this problem is even more insidious:
Ask your HR department if they have a Radford Benchmark Salary Survey
Job Description -for the work you do.
(or equivalent to AON Consulting/Radford Associates service)
I became aware some months ago that in some parts of the industry do not
have
a
Try this:
http://www.google.com/search?q=MTBFbtnG=Google+Search
Google is my favorite search engine. No rubbish.
Regards,
kyle
the weight
just for that...
kyle
-Original Message-
From: Mike Hopkins [mailto:mhopk...@thermokeytek.com]
Sent: Tuesday, November 20, 2001 2:47 PM
To: 'Ehler, Kyle'; 'wmf...@aol.com'; emc-p...@ieee.org
Subject: RE: Methods Equipment; Surge Dips
Seems to me this is the hard way to do
Hi William,
I dont know about renting equipment for the tests.
You can probably find it.
For the -4-11 (dip/dropout) test;
Depending on your load, your site wiring has to be up to snuff.
The power sources for doing the dip and dropout test are hefty stuff.
My lab uses a three-phase powered source
. That makes it a thankless
job, with little if any, appreciation. Ha!! what's that you say...you want
a medal? -for driving up COSTS and delaying product release!!! If it
were'nt for the beaurocracy...you would not have a job.
[Ehler, Kyle]
(my words)
-Original Message-
From: Brian McAuliffe
I knew someone was going to ask this..
A few years back, I was attending a UL 1950 seminar in Minneapolis.
One of the presenters (a fellow named 'Bahra') happened to mention
that UL has a specification for the 'electric chair'.
The operating current was quoted by him to not exceed 70ma.
I
Please, oh please! let Ed Price have the job.
-ANYTHING to keep Ed out his Santa suit Ho, HO, HOing around the malls.. :)
He beat me to it last year. I NEED the spare income this year.
heh heh,
kyle
-Original Message-
From: lfresea...@aol.com [mailto:lfresea...@aol.com]
Sent: Tuesday,
To: emc-p...@majordomo.ieee.org
Subject: Re: Metrics cost at 1991
I read in !emc-pstc that Ehler, Kyle keh...@lsil.com wrote (in
95fbd8b0830ed511b7720002a51363f102905...@exw-ks.ks.lsil.com) about
'Metrics cost at 1991', on Mon, 5 Nov 2001:
Naturally, the project dictated to me is to attempt
: Wednesday, November 07, 2001 11:04 AM
To: Ehler, Kyle
Cc: 'cecil.gitt...@kodak.com'; 'EMC and Safety list'
Subject: Re: (was blank, now Alternate construction strategies)
Kyle
That is exactly the same strategy we take when selling products with
integrated PCs. Specify a max power consumption
Richard, et al
This sounds like a Six Sigma project.
Having just completed my 'green belt' training, I have been assigned a
project to complete my certification as a Six Sigma green (horn) belt. This
is a *huge* undertaking for me..
Naturally, the project dictated to me is to attempt an analysis
In our OATS dome, we use a pair of large antistatic plastic Rubbermaid
wheeled carts with a sheet of plywood laid across the tops.
A tabletop host pc is set on that.
How's that effecting the measurements? groaner
Should these effects be part of the 'uncertainty'?
Kyle Ehler KCØIQE
I like a material called 'Formex GK' polypropylene because is is not
hygroscopic like nomex and has acceptable flame rating. I dont know if they
offer it in clear.
Model GK-17BK comes in a 24 inch by 1000 foot roll and is 0.017 thick black
sheet. UL listed CCN: QMFZ2 file # E121855
Try: ITW
What about calibration?
Is a trailer ball NIST traceable? =:P
As a 'CTDP' participant I have to maintain a cal list on all instruments I
use in the course of my tests and include it with any test reports I ship to
agencies.
I had to get my certified 'sphere' calibrated recently. -Not that it
Hi Tim,
Welcome to the fray..
There is in existence a sheet material that exhibits these properties
however, the flux sensitivity may not be sufficient for practical use
with EMI work. I suspect it is for intense near field only.
Here's a link: http://www.wondermagnet.com/dev/magnet34.html
Has
. But clearly you will never get optical or IR
viewer resolutions.
--
From: John Woodgate j...@jmwa.demon.co.uk
To: emc-p...@majordomo.ieee.org
Subject: Re: TV nostalgia
Date: Mon, Aug 6, 2001, 12:28 PM
95fbd8b0830ed511b7720002a51363f1319...@exw-ks.ks.lsil.com, Ehler, Kyle
keh...@lsil.com
...@jmwa.demon.co.uk]
Sent: Tuesday, August 07, 2001 1:37 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: ESD - time between successive discharges
95fbd8b0830ed511b7720002a51363f1319...@exw-ks.ks.lsil.com, Ehler, Kyle
keh...@lsil.com inimitably wrote:
I suppose what I am alluring to
You aren't
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, August 06, 2001 12:29 PM
To: emc-p...@majordomo.ieee.org
Subject: Re: TV nostalgia
95fbd8b0830ed511b7720002a51363f1319...@exw-ks.ks.lsil.com, Ehler, Kyle
keh...@lsil.com inimitably wrote:
Doug has touched
I've been following this thread about ESD testing and the PPS debate.
I would like to inject my point of view on the subject.
So far most of what I have read addresses the need for speed.
This is great for the test lab/house; to be able to slam through the process
in a quest to get it done
Doug has touched on what I think would be a great tool for the
EMI hunter...but rather than a 'sniffer', a 'goggle' similar
to what Geordi wears that facilitates the direct viewing of EM radiation.
Ideally, the device would allow adjustable band 'viewing' of the radiation
frequency, intensity,
94V0 and,
typical of Heath products,
documented more than thoroughly. Very well made!
kyle
-Original Message-
From: Ralph Cameron [mailto:ral...@igs.net]
Sent: Friday, August 03, 2001 2:41 PM
To: Ehler, Kyle; 'Rich Nute'; 'EMC and Safety list'
Subject: Re: TV nostalgia
And lest we forget
If they were'nt 'hand wired' who/what would have wired the chassis?
robots? chimpanzees?
Its funny how the public is led to believe that accepted status quo
is somehow better than an emerging technology, but then as Jack
points out, paper/phenolic was the best the technology had to offer
at
Ah, you guys have about 10/15 years on me...
I remember the Motorola Quasar 'works in a drawer'. When they didnt work,
they were hard to fix..
Zenith had the motto 'the quality goes in before the name goes on'. They
really were pretty good.
RCA had the best chassis, but the grounds always
Thank You so much Rich, Patricia, Mike, Jim, Ed, et al;
Please do continue to contribute your wisdom to this forum.
I spoke with my LES engineer and good friend at UL. [a good friend at UL is
a handy thing!]
Someday I should expound on the usefulness of proper care and feeding of
your agency
and digest this week.
(Time for annual CTDP lab inspection, -oh joy!)
kyle
-Original Message-
From: Ehler, Kyle [mailto:keh...@lsil.com]
Sent: Wednesday, August 01, 2001 6:59 AM
To: 'EMC and Safety list'
Subject: Mains fusing
Greetings,
I have a new product that includes an off the shelf
Greetings,
I have a new product that includes an off the shelf UPS that is rated for
230V ac operation and has an internal single pole circuit breaker on the
mains inlet. We want to target this product world-wide. The UPS presently
is CB and certified to EN60950 european only. For North
This link:
http://europa.eu.int/comm/dg03/directs/dg3b/newapproa/eurstd/harmstds/reflis
http://europa.eu.int/comm/dg03/directs/dg3b/newapproa/eurstd/harmstds/refli
s
Produces a '404' for me.
I get as far as http://europa.eu.int/comm/dg03/directs/dg3b/
I'm sorry to plague the list with such a mundane query, but I am forced to
perform the UL1950 '1.7.15 Permanence of Marking' test using HEXANE as the
test solvent. I cannot find a local source willing to sell less than
55Gal
0.5L would probably last me ten years.
Anybody know of a source?
Greetings,
15 years ago I was doing some work at SWRI in San Antonio where I watched an
EMC tech construct two RF probes from small diameter copper jacket hardline
(semi-flex coax?). These probes resemble a kid's toy soap bubble loop, but
they work wonderfully well for non-contact source
Hi Scott,
I applied 1 bead board (styrofoam) in 4X8 sheets. After many trials with
double sided carpet tape, foam tape, silicone rubber compound (RTV), etc. I
found that 'Liquid Nails -Project' (latex based -non solvent) applied with a
caulk gun to reliably hold the panels in place. I used a 2
Greetings,
We have been lucky in the past, but with the real estate crunch that comes
with smaller products, its getting more difficult to find space to apply a
warning label.
For example, a 'Class 1 Laser Product'.
Just how tiny can the text/graphics in a label be and still comply?
Kyle
As John, Scott and Nick have stirred (RE: IEC 60990 Vs IEC 60950), I just
happen to be in need of specifying which standards to purchase in effort to
have a comprehensive up-to-date reference library. It's that budget
time...but I don't want to run up a huge bill with standards we may not
need.
I'm probably mistaken, but it would seem that just having the plastic
material marked on the parts would not be enough proof because of the chance
of mis-marking. Have I missed something here? This just seems too easy.
I presently use a system of lot marking codes with a simple one-page
-Original Message-
From: Brian At Work [SMTP:bkundew...@qtm.net]
Sent: Monday, September 13, 1999 9:26 AM
To: emc-p...@ieee.org
Subject:Ground Bond Testers - Continued
Thanks to everyone for your replies.
Using
Hi,
As sensitive as some agencies are about test instruments and calibration,
using a rogue current source to do this test would seem to require some
level of traceability for the instruments used? We maintain an updated list
of all lab instruments and calibration affectivity as used and
I just received an amended CB report for a product we make and I was
reviewing it and see that a 'fail' verdict was given for a deviation + test
in Sub-Clause 5.3.101 of the Japanese deviation to IEC 950. A remark of
Not evaluated as part of this investigation also appears. The text of the
Interesting how the this forum hits on my concerns.
I recently had a new product witnessed by a UL engineer from NorthbrooK. He
wanted to see the ground bond test performed and so I ran the test for two
minutes at 30A and 6Vac. When he saw this, he demanded the test be run at
12Vac which is
Hi Kamran,
I've run into this problem myself. Usually, it is because the test
conditions you use are different from what the vendor is using. They may be
loading the EUT to full capacity and/or using a thermocouple attachment
method different from yours. In the case where your product's
Hi Egon,
Gee, I'm glad the list found you. I was really worried for a moment... ;)
I checked out the CENELEC decision website and found it to indeed be missing
the EN60950. Could I infer from this that there have been NO
decisions...nyet! The site looks like it could use some tender loving
John,
When you find one, post the vendor here on the list.
-we looked for one also, but with ATX wiring, and could not find one that
had international compliance. The vendor is Sunpower model SAP 6300P. It
is CE marked and specifically marked with 'passes harmonics' and standard,
but there is
My lab is just 90Km from the world's largest salt mine (Cary Salt,
Hutchinson Kansas, U.S.A.).
The mine is 0.9Km underground. We send our records there for permanent
archival.
-I'll suggest this to my superiors as a possible OATS relocation site.
[yeah, right!!]
Imagine: negligible RF and
Is this an oxymoron?
I sometimes wish we had a GTEM, but our anechoic screen room has just
started to be used for pre-compliance testing and troubleshooting. The
workstation consists of a Braden CFC (3000 cu.ft Compact Ferrite Chamber),
AR FM2000 isotropic probe, AR 1Kw log periodic, AR
Hi Richard,
I've been tasked with maintaining the ground screen on our OATS and what
worked best for me on galvanized screen (aka hardware cloth) was a tub of
fresh acid flux, such as that found in plumbing stores, and a 300 watt
soldering iron with a wide tip. I don't recommend using a torch
Hi Brian,
Those sound like 5 or 10 watt Pasternack prices...they
are better than HP, but still higher than what we stumbled
into at some of the HAM radio crowd's cache of stuff.
I'm assuming you want 50 ohm 'N' connector types.
Check out this guy:
Gaylen Pearson WB0W (WBzeroW)
P.O. box
Hi Scott,
A while back I inquired with TUV, UL and FCC about this very subject.
UL and TUV is pretty loose about manufacturer's recordkeeping of production
run information, but product safety test data and related filing information
is expected to be retained for at least seven years after last
I tend to agree with Gary that disk drives do not heft a big load change and
cause flicker. I have repeatable lab test proof of this on an ITE product
we make that has ten disk drives (each ranging in capacity from 9 to
50Gbytes). I have run flicker test while the box is running a program we
Greetings.
This is my first post here. I do both EMC testing and product safety, but
primarily product safety testing and filings through Underwriter's
Laboratories acting as both reviewer and submitter [Technical Administrator]
in a two-person safety department.
Reason I present here before
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