Ed,
DefStan 59-41 has been superseded by 59-411 since Jan 2007 and again by 59-411
Amendment 1 in Jan 2008.
DRE03.3 has been replaced with DRE03.A and no longer refers to either Bowman
or Clansman radios.
Best Regards,
Dave Coleman AIIRSM
SELEX Communications
Signal House, Grange Road
Dear experts,
The CB reports for our products allow for the use of alternates for the
majority of the d.c. powered components as long as the alternate parts
provided are to the same procurement spec's as the part listed in the CB
report. These parts are rated +24Vdc or less and the majority of
Dear All,
I am most embarrassed to say that I can't find in my saved emails or in a
search of the EMC-PSTC archives or in Google search, a reference I think I once
saw to a Mil Handbook that helps with calculations of MTBFs for mechanical
items. I'm sure someone has mentioned it in the same
Hi Craig,
For alternate parts, the certificate holder submits an application for change
(or application for modification, depending on translation) to CQC (not a new
application), according to a vice president of the CQC.
Please let me know if I can be of any further assistance.
Regards,
Grace,
Thanks for your prompt response. Do this procedure have to be followed for
every alternate part, e.g. a parts shortage of a +24Vdc, 0.15A fan would
require us to have to go through CQC change process prior to being able to
pick up a fan to the exact same procurement spec from a different
Mark
I think you are looking for the NSWC mechanical model for prediction. Most
of the proprietary software packages support this.
Best regards
Neil R. Barker CEng MIET HonFSEE MIEEE
Manager
Quality Engineering
e2v technologies (uk) ltd
106 Waterhouse Lane
Chelmsford
Essex CM1 2QU
UK
Predicting the reliability of mechanical systems is much more complicated than
for electrical systems. Part of the trouble is that there are often more
uncontrolled variables in mechanical systems. You may find some information
on mechanical predictions in the electrical reliability sources, but
EN 55022:2006 does indeed include the limits for radiated emissions in the
range 1 GHz to 6 GHz. Look at section 6.2. This standard is published in
the OJ and becomes compulsory under the EMC Directive as of 1 Oct 2009.
Jim Hulbert, Group Leader
TSO Competitive Compliance Engineering
Colleagues -
May I thank everyone who has Emailed me both directly and though the mailing
list, for the help they have provided.
In just five-and-a-half hours I have received enough links and pointers to keep
occupied solidly for a week or two reading it all.
With thanks again,
Mark
In message
72b8947772cf0948adaa9853631663fb20c833e...@pbi-namsg-02.mgdpbi.global.pv
t, dated Wed, 29 Oct 2008, Jim Hulbert jim.hulb...@pb.com writes:
EN 55022:2006 does indeed include the limits for radiated emissions in
the range 1 GHz to 6 GHz. Look at section 6.2. This standard is
Currently Australia / New Zealand and VCCI have put a tempory stay on
measuring above 1 GHz until at least the 1 Oct 2009 date. See
http://www.acma.gov.au/WEB/STANDARD/pc=PC_100964
http://www.vcci.or.jp/vcci_e/topics/new0910.html
however, we are setup to perform these measurements
Larry
I'm looking for data on UV attenuation
of various ordinary glasses such as
window glass or glass used in copiers.
Or glass used in projector lenses.
I've done some internet searching, but
I've not yet found anything with the
parameters I've put into Google.
Thanks in advance for your help.
In message 606D0538E00640A4B62237F2CC21D012@PC323541548743, dated Wed,
29 Oct 2008, rn...@san.rr.com writes:
I'm looking for data on UV attenuation
of various ordinary glasses such as
window glass or glass used in copiers.
Or glass used in projector lenses.
I've done some internet searching,
Rich,
There is some information on UVA and UVB at
http://en.wikipedia.org/wiki/UV#cite_note-2; with some references at the
bottom of the page.
Best Regards,
John Radomski
rn...@san.rr.com
Sent by: emc-p...@ieee.org
10/29/2008 02:31 PM'emc-p...@ieee.org' emc-p...@ieee.org To
�
�Here is a couple of references from a presentation I did a month or two ago.
NSWC-94/L07 - Handbook of Reliability Prediction Procedures for Mechanical
Equipment
This handbook, developed by the Naval Surface Warfare Center � Carderock
Division provides failure rate models for fundamental
Brian,
Well, I agree with you in that I don't see 9.1.4.1 prohibiting what the
inspector claims it prohibits, but this may be a moot point.
If we are speaking of a true jurisdiction electrical inspector and not a third
party hired to assess the conformance of your design to NFPA 79, then it
Jim and group,
The British Standards version of EN 55022:2006 does not have a section 6.2 and
only covers radiated emissions 30 - 1000 MHz. I also have a version obtained
from Dansk Standards that consisted of a list of modifications to CISPR 22
that was attached to CISPR 22 Edition 5.2 (Edition
Brian,
Unfortunately, you inspector is incorrect, although you are probably going to
have an issue with convincing him of this. Section 9.1.4.1 specifically says
All operating coils of electromechanical magnetic devices, it makes no
reference to the load side of the device. It also makes no
You must have an early copy put out by BSI. They made a mistake and included
Amendment 1 to CISPR 22, Edition 5.0 and withdrew it promptly when I pointed
out their error. Limits above 1 GHz should not be included in EN 55022:2006.
Ghery S. Pettit, NCE
Convener, CISPR SC I WG3
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