FW: EFFECT

1999-06-30 Thread Arun Kaore

Interesting to note that the term Electromagnetic Effect could be triggered
by Enrico Fermi back in the 40's when he suggested that electromagnetic
effects would be observed in a nuclear explosion ( with different generation
mechanisms- Surface Burst, Air Burst, HEMP etc and different waveshapes and
levels) and lightning strikes. 

Towards achieving better Electromagnetic Compatibility, this resulted in the
introduction of MIL 462 tests CS10, CS 11, CS 12, CS 13 and RS05- with most
waveforms simulated by the commonly available Solar Transient Generators in
shielded rooms and/or Bounded wave TEM cells.

In a narrow sense therefore, it could be said that to achieve good
compatibility, the equipment should withstand external natural or man made
electromagnetic effects.

Another form of environmental effect on EMC is the deterioration of EMC
gaskets, beryllium  fingers and formation of oxides on an otherwise perfect
bond in salty, humid or corrosive atmosphere rendering shielding
effectiveness failure over time and/or environment, bringing up issues of
periodic EMI/EMC Preventive Maintainence in the log books!




Arun Kaore
EMC Engineer

ADI Limited
Systems Group
Test  Evaluation Centre
Forrester Road, St Marys 2760
P O Box: 315, St Marys NSW 1790

Tel: 61 2 9673 8375
Fax: 61 2 9673 8321
Email: kao...@sg.adi-limited.com.au

-Original Message-
From:   Javor, Ken [SMTP:ken.ja...@hsv.sverdrup.com]
mailto:[SMTP:ken.ja...@hsv.sverdrup.com] 
Sent:   Wednesday, 30 June, 1999 1:48
To: 'ed.pr...@cubic.com'; EMC-PSTC; PETER PHILLIPS
Subject:RE: EFFECT


I agree with the substance of Ed's comment.  In my experience the more usual
terminology is EME = electromagnetic environment, while E3 (E-cubed) =
electromagnetic environmental effects.  Neither of these terms relates
directly to the adverse effect on rf or EMC performance due to other
environmental conditions.  
 -Original Message-
 From: ed.pr...@cubic.com mailto:ed.pr...@cubic.com
[SMTP:ed.pr...@cubic.com] mailto:[SMTP:ed.pr...@cubic.com] 
 Sent: Monday, June 28, 1999 11:43 AM
 To:   EMC-PSTC; PETER PHILLIPS
 Subject:  Re: EFFECT
 
 
 Peter:
 
 Electromagnetic Effects (EME) is a bit more comprehensive a concept
 than Electromagnetic Compatibility (EMC). There are many things that
 you can do with electromagnetic energy that are not necessarily
 related to compatibility. RF techniques can be used to investigate or
 change physical properties, protect friendly forces, confuse hostile
 forces, deny use of assets, eavesdrop; well, lot's more.
 
 I would say that EMC is a subset of EME.
 
 Regards,
 
 Ed
 
 
 
   From:   PETER PHILLIPS peter.phill...@mira.co.uk
mailto:peter.phill...@mira.co.uk 
   Subject:EFFECT
   Date:   Mon, 28 Jun 1999 14:41:12 +0100 
   To: Emc-Pstc (E-mail) emc-p...@ieee.org mailto:emc-p...@ieee.org 
 
 
  
  Dear group,
  
  Has anybody heard about the term EFFECT relating to EMC and
 environmental
  testing combined.
  
  I am looking for any information on the topic, also any views
that
 people
  may have regarding the change in EMC performance due to adverse
  environmental conditions
  
  Looking forward to your comments
  
  Peter 
  
 

  Peter Phillips
  MIRA (Motor Industry Research Association)
  Tel:++44 (0)1203 355576 
  Fax:++44 (0)1203 355486
  e-mail peter.phill...@mira.co.uk
mailto:peter.phill...@mira.co.uk 
  
  
  
  
  
 
 ---End of Original Message-
 
 --
 Ed Price
 ed.pr...@cubic.com mailto:ed.pr...@cubic.com 
 Electromagnetic Compatibility Lab
 Cubic Defense Systems
 San Diego, CA.  USA
 619-505-2780
 Date: 06/28/1999
 Time: 08:42:51
 Military  Avionics EMC Services Our Specialty
 Also Environmental / Metrology / Reliability
 --
 
 

 



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FW: EFFECT

1999-06-30 Thread Arun Kaore

Peter,
Noting that the thread has originated from MIRA, some of the Environmental
Effects which should have minimal EMC impact (over the periodic maintenance
lifetime) on the Engine Management Systems, Braking and Air Bag Deployment
Systems etc could be:
Vibration and Shock, Climate, Temperature, Presence of 60/50Hz High HV Power
Cabling and Traffic Management cabling under/over roads etc. There have been
incidences of Brakes or other unintended functions deploying with a mind of
their own at certain geographic locations and traffic lights!
Immunity aspects mostly covered under the Automotive Directive. 
Arun Kaore
EMC Engineer

ADI Limited
Systems Group
Test  Evaluation Centre
Forrester Road, St Marys 2760
P O Box: 315, St Marys NSW 1790

Tel: 61 2 9673 8375
Fax: 61 2 9673 8321
Email: kao...@sg.adi-limited.com.au


From:   PETER PHILLIPS [mailto:peter.phill...@mira.co.uk]
mailto:[mailto:peter.phill...@mira.co.uk] 
Sent:   Monday, June 28, 1999 9:41 AM
To: Emc-Pstc (E-mail)
Subject:EFFECT



Dear group,
Has anybody heard about the term EFFECT relating to EMC and environmental
testing combined.
I am looking for any information on the topic, also any views that people
may have regarding the change in EMC performance due to adverse
environmental conditions
Looking forward to your comments
Peter 


Peter Phillips
MIRA (Motor Industry Research Association)
Tel:++44 (0)1203 355576 
Fax:++44 (0)1203 355486
e-mail peter.phill...@mira.co.uk mailto:peter.phill...@mira.co.uk 


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