James,
What is the product that you are interested in? There are quite a few
standards that deal with product noise measurements, not all use the
same measurement distance. Many use sound power, which is independent
of distance.
Lyle Luttrell
Regulatory /Reliability Engineer
Breece Hill
James,
John Downs of dB Sound Labs has always been able to answer those types of
questions for me. You might try giving him a call. His contact info is
shown below...
John Downs
Sr. Staff Engineer
(760) 940-4216
Fax: (760) 940-6321
412 Hillway Drive
Vista, Ca. 92084-6342
--
Sincerely,
On Thu, 8 Apr 1999, Florence Sandy-ESF003 wrote:
Does anyone know of upcoming training seminars on EN 61508
I'm not aware of any specific training on IEC61508. This standard,
Functional Safety: Safety Related Systems, is usually covered by courses
on Safety Critical Software. The University
James,
I believe the standard you want is ISO 7779 Measurement of airborne noise
emitted by computer and business equipment. In a past life I had to use this
standard and in it are specific measurement criteria. Some criteria from
memory
are number and placement of microphones,
I don't think that you can easily convert IP to NEMA codes. However, there
is a nice little chart which converts NEMA to IP. You can locate it at
http://www.ul.com/hazloc/ref/conversion.htm
The standard which defines the NEMA codes is NEMA-250,1997.
Mark Werlwas
Product Safety Engineer
I would like to add an item to this.
If the US test house that you used for CE EMC testing is accredited by the
ACA (as the test house I use is), they can also issue an 'Australian Test
House' Certificate based on the EN55022 testing, attesting to the fact that
the product also meets AS/NZS 3548.
Where can I get ferrite bead SPICE models in the 1Mhz to 100Mhz range. I
desire something simple that can simulate DC current filters with a SPICE
transient response. If it could simulate both resistance and reactance as a
function of frequency at varying DC current levels that would be
Hello group,
I have been able to find limits for noise exposure, but not measurement
methods. Can anyone give the measurement methods, or a reference to a
method. Specifically, I'm looking for something like the distance from the
microphone, to the noise source.
Thank you
James Goedderz
-Original Message-
Russell, Ray wrote:
I am looking for a comparison of IEC 60529 IP ratings for enclosures to the
NEMA equivalents.
Ray,
If you have a copy of NEMA 250 (which defines NEMA enclosures), I believe
there is an appendix in the back which compares the 529 ratings to NEMA
There are still plenty of seats left for the April meeting of the Orange
County Chapter of the IEEE EMC Society. Everyone is welcome to join us!
Details below.
Greetings EMC Professionals!
The Orange County Chapter of the IEEE EMC Society has invited
Is IEC 61000-4-14 (Test and Measurement Techniques - Voltage fluctuation
immunity test) a basic standard or a testing guideline?
Has anyone heard of any upcoming requirements for harmonic immunity or
voltage fluctuation immunity?
Thanks,
Bob Heller
-
This message is coming from the
Ray,
I believe that UL's website comparison table, titled Comparison of NEMA
Type and IP Code Designations, may be just what you are looking for:
A HREF=http://www.ul.com/hazloc/ref/conversion.htm;Division/Zone
Classifications Comparisons
/A
In a message dated 4/8/99 6:33:25 AM Pacific
Greetings!!
I'm looking for advice and any experience from the group regarding
spread spectrum testing.
I'm applying RSS-210 for Canadian requirements (License exempt RF
Devices...), and looking at the 900-928 and 2400-2483 MHz S.S. bands for
Direct Sequencing systems.
A couple of the things
NEMA 250 , appendix A has a chart that makes the
comparison between NEMA and IP ratings, although it can only be used to
convert NEMA type numbers to IEC Classifications.
Hope this helps.
Kevin Robinson
MET Laboratories
What Barry said is true except the test facility that did the testing must
have an accreditation recognized by Australia.in the U.S., this is
either A2LA or NVLAP.
===
===
Barry Esmore
Does anyone know of upcoming training seminars on EN 61508
Regards,
Sandy
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Greetings Rich,
C-Tick costs only your time spent in gathering up your EN55022 report(s).
There is no fee. You do need an Australian Rep of some sort to do the
filing for you...
If you need any other information regarding Australian approvals send an
email to Kevin Richardson. He is very
Richard, there should be only a one time cost, if any, and that involves the
application to use the c-tick mark. Only one application is required for all
of your ITE. That application must be submitted by a person located in
Australia, and that person may be an employee or an empowered
Hello Richard,
Answers to your questions:
- The APPROXIMATE cost to register with the ACA (no longer SMA) is
$zero.
- If you have reports to EN55022 it is only a paper work exercise.
- You will need an Australian company to sign the DOC and hold the
compliance folder.
Hope this helps.
Hi folks,
What about the blue poly bags which used to contain the electronic
components? Is it the same type of pink poly bag?
Regards,
Raymond LI
==
Lacey,Scott sla...@foxboro.com on 07/04/99 09:10:28 p
Please
Anybody out there have a chamber for sale?
Need at least 3m testing of a small refrigerator size.
- Robert -
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