Re: [PSES] Tilt test

2019-06-11 Thread frankt_cpmt
Thank you for sharing your experience Ted. Sent via the Samsung Galaxy S8, an 
AT 5G Evolution capable smartphone
 Original message From: Ted Eckert 
<07cf6ebeab9d-dmarc-requ...@ieee.org> Date: 6/11/19  21:03  (GMT-08:00) To: 
EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Tilt test 

Let me address the question of “how to safely perform this test”.

 
The proper safety precautions depend on the mass and stability of the 
equipment. Equipment doesn’t have to be too heavy to cause an injury if it 
falls over on somebody. If the equipment is large and/or very heavy, consider 
having it tested
 at a laboratory that has equipment that can do the test safely. If you don’t 
have that option, think about what precautions may be required.
 
I can give an example of a test I ran at a previous employer. I had to run a 
10-degree tilt test on a standard sized equipment rack loaded to 1500 kg. The 
stabilization feet were down, but they were only about 500 mm apart between the 
two
 sides of the rack. The rack was a full 2-meter height with the load evenly 
placed in the rack. This should have been done at an external laboratory with 
the proper equipment. However, an NRTL was there to witness testing and they 
insisted in seeing it done
 that day. 
 
The first mistake was figuring out how to tilt the rack. The solution was to go 
to the parking lot and to get the jack out of the back of a car. The jack was 
designed to lift one wheel of a 1500 kg car, not half of a 1500 kg rack. 
Somehow,
 the jack survived the test and tilted the rack.
 
The second mistake was the placement of the test. The rack was about 1 meter 
from a wall and we tilted it towards that wall. It was standard drywall 
construction, and I don’t think it would have stopped the rack if it fell over. 
The people
 in the office on the other side would have been in for a surprise.
 
The next mistake was not placing any limitation on the tilt. We could have 
placed straps at the top of the rack to a solid support in the lab. We could 
have limited the tilt to 11 degrees, so that if the rack did start to go over, 
it would
 have been stopped before it went too far. This probably would have also 
required blocking the stabilization feet to keep them from sliding.
 
There was an additional error of not properly securing all loads inside the 
rack. The full loading of the rack was simulated using steel plates, but they 
were just held in place by gravity. When the tilt reached 8 degrees, much of 
the weight
 shifted. We were tilting the rack towards its front, and only the latch on the 
front door kept the plates from sliding out of the rack.

 
The test was completed without incident, and that was largely due to the 
mechanical engineers designing the product to pass the test. There were still 
plenty of opportunities for things to go wrong. The NRTL engineer left the 
facility happy
 with the results. Only after that did I realize how poorly designed the test 
setup was.
 
In summary, think about the worst possible things that could happen during your 
test. Figure out ways to design them out of your test setup. If you can’t 
eliminate a risk, consider taking the product to a facility that can run the 
test
 more safely. If you are not sure what the hazards may be, consult with your 
facilities Employee Health and Safety (EH) staff.
 
Ted Eckert
Microsoft Corporation
The opinions expressed do not necessarily reflect those of my current or former 
employers.  
 

This email message may contain confidential and privileged information.  Any 
unauthorized use is prohibited.  If you are not the intended recipient,
 please contact the sender by reply email and destroy all copies of the 
original message.

 


From: Frank Tang <0d3fa4ae712a-dmarc-requ...@ieee.org>

Sent: Tuesday, June 11, 2019 1:18 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Tilt test


 



Hi Engineering community,


I'm trying to find information regard tilt testing, such as minimal tilt angle 
based on system weight, how to safely perform this test, etc; can someone 
direct me to site(s) or
 standards I can reference?


Google for once isn't helping.


 



--
Thank you and best regards.
- Frank




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Re: [PSES] Tilt test

2019-06-11 Thread Ted Eckert
Let me address the question of “how to safely perform this test”.

The proper safety precautions depend on the mass and stability of the 
equipment. Equipment doesn’t have to be too heavy to cause an injury if it 
falls over on somebody. If the equipment is large and/or very heavy, consider 
having it tested at a laboratory that has equipment that can do the test 
safely. If you don’t have that option, think about what precautions may be 
required.

I can give an example of a test I ran at a previous employer. I had to run a 
10-degree tilt test on a standard sized equipment rack loaded to 1500 kg. The 
stabilization feet were down, but they were only about 500 mm apart between the 
two sides of the rack. The rack was a full 2-meter height with the load evenly 
placed in the rack. This should have been done at an external laboratory with 
the proper equipment. However, an NRTL was there to witness testing and they 
insisted in seeing it done that day.

The first mistake was figuring out how to tilt the rack. The solution was to go 
to the parking lot and to get the jack out of the back of a car. The jack was 
designed to lift one wheel of a 1500 kg car, not half of a 1500 kg rack. 
Somehow, the jack survived the test and tilted the rack.

The second mistake was the placement of the test. The rack was about 1 meter 
from a wall and we tilted it towards that wall. It was standard drywall 
construction, and I don’t think it would have stopped the rack if it fell over. 
The people in the office on the other side would have been in for a surprise.

The next mistake was not placing any limitation on the tilt. We could have 
placed straps at the top of the rack to a solid support in the lab. We could 
have limited the tilt to 11 degrees, so that if the rack did start to go over, 
it would have been stopped before it went too far. This probably would have 
also required blocking the stabilization feet to keep them from sliding.

There was an additional error of not properly securing all loads inside the 
rack. The full loading of the rack was simulated using steel plates, but they 
were just held in place by gravity. When the tilt reached 8 degrees, much of 
the weight shifted. We were tilting the rack towards its front, and only the 
latch on the front door kept the plates from sliding out of the rack.

The test was completed without incident, and that was largely due to the 
mechanical engineers designing the product to pass the test. There were still 
plenty of opportunities for things to go wrong. The NRTL engineer left the 
facility happy with the results. Only after that did I realize how poorly 
designed the test setup was.

In summary, think about the worst possible things that could happen during your 
test. Figure out ways to design them out of your test setup. If you can’t 
eliminate a risk, consider taking the product to a facility that can run the 
test more safely. If you are not sure what the hazards may be, consult with 
your facilities Employee Health and Safety (EH) staff.

Ted Eckert
Microsoft Corporation
The opinions expressed do not necessarily reflect those of my current or former 
employers.

This email message may contain confidential and privileged information.  Any 
unauthorized use is prohibited.  If you are not the intended recipient, please 
contact the sender by reply email and destroy all copies of the original 
message.

From: Frank Tang <0d3fa4ae712a-dmarc-requ...@ieee.org>
Sent: Tuesday, June 11, 2019 1:18 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Tilt test

Hi Engineering community,
I'm trying to find information regard tilt testing, such as minimal tilt angle 
based on system weight, how to safely perform this test, etc; can someone 
direct me to site(s) or standards I can reference?
Google for once isn't helping.

--
Thank you and best regards.
- Frank
-


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 can be used for graphics (in well-used formats), large files, etc.

Website: 

Re: [PSES] Tilt test

2019-06-11 Thread Nyffenegger, Dave
Frank,

I’m sure it depends on the product and applicable standard,  EN 60950-1 and EN 
62368-1 both have stability requirements/tests.

-Dave

From: Frank Tang [mailto:0d3fa4ae712a-dmarc-requ...@ieee.org]
Sent: Tuesday, June 11, 2019 4:18 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Tilt test

Hi Engineering community,
I'm trying to find information regard tilt testing, such as minimal tilt angle 
based on system weight, how to safely perform this test, etc; can someone 
direct me to site(s) or standards I can reference?
Google for once isn't helping.

--
Thank you and best regards.
- Frank
-


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discussion list. To post a message to the list, send your e-mail to 
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Re: [PSES] Tilt test

2019-06-11 Thread frankt_cpmt
Thanks John. Sent via the Samsung Galaxy S8, an AT 5G Evolution capable 
smartphone
 Original message From: John Woodgate  Date: 
6/11/19  14:00  (GMT-08:00) To: Frank Tang , 
EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Tilt test 
Clause 8.6 of IEC 62368-1. I don' t know if
the UL version differs.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-06-11 21:18, Frank Tang wrote:


  
  

  Hi Engineering community,
  I'm trying to find information regard tilt testing, such
as minimal tilt angle based on system weight, how to safely
perform this test, etc; can someone direct me to site(s) or
standards I can reference?
  Google for once isn't helping.
  
  
  
--
  Thank you and best regards.
  - Frank
  

  
  -
  
  This message is from the IEEE Product Safety Engineering
Society emc-pstc discussion list. To post a message to the list,
send your e-mail to 
  All emc-pstc postings are archived and searchable on the web
at:
http://www.ieee-pses.org/emc-pstc.html
  Attachments are not permitted but the IEEE PSES Online
Communities site at http://product-compliance.oc.ieee.org/
can be used for graphics (in well-used formats), large files,
etc.
  Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html
  (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
  
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Mike Cantwell 
  
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-

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Re: [PSES] Tilt test

2019-06-11 Thread frankt_cpmt
Doug,Thanks for referencing the sections. I do believe it has to comply with 
61010-1.Sent via the Samsung Galaxy S8, an AT 5G Evolution capable smartphone
 Original message From: Doug Powell  Date: 
6/11/19  14:27  (GMT-08:00) To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 
Tilt test You might also check IEC 610100-1 which is harmonized to UL.  Clauses 
7.4 Stability, 8.3 Drop test and 11.4 if the tilt question is bout overflow 
(containment of liquids).All the best, DougDouglas E PowellLaporte, Colorado 
USAdougp01@gmail.comhttp://www.linkedin.com/in/dougp01On Tue, Jun 11, 2019 at 
3:00 PM John Woodgate  wrote:
  

  
  
Clause 8.6 of IEC 62368-1. I don' t know if
the UL version differs.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-06-11 21:18, Frank Tang wrote:


  
  

  Hi Engineering community,
  I'm trying to find information regard tilt testing, such
as minimal tilt angle based on system weight, how to safely
perform this test, etc; can someone direct me to site(s) or
standards I can reference?
  Google for once isn't helping.
  
  
  
--
  Thank you and best regards.
  - Frank
  

  
  -
  
  This message is from the IEEE Product Safety Engineering
Society emc-pstc discussion list. To post a message to the list,
send your e-mail to 
  All emc-pstc postings are archived and searchable on the web
at:
http://www.ieee-pses.org/emc-pstc.html
  Attachments are not permitted but the IEEE PSES Online
Communities site at http://product-compliance.oc.ieee.org/
can be used for graphics (in well-used formats), large files,
etc.
  Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html
  (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
  
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Mike Cantwell 
  
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-- Douglas E Powelldougp01@gmail.comhttp://www.linkedin.com/in/dougp01
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Re: [PSES] Tilt test

2019-06-11 Thread Doug Powell
You might also check IEC 610100-1 which is harmonized to UL.

Clauses 7.4 Stability, 8.3 Drop test and 11.4 if the tilt question is bout
overflow (containment of liquids).

All the best, Doug


Douglas E Powell
Laporte, Colorado USA
doug...@gmail.com
http://www.linkedin.com/in/dougp01



On Tue, Jun 11, 2019 at 3:00 PM John Woodgate  wrote:

> Clause 8.6 of IEC 62368-1. I don' t know if the UL version differs.
>
> Best wishes
> John Woodgate OOO-Own Opinions Only
> J M Woodgate and Associates www.woodjohn.uk
> Rayleigh, Essex UK
>
> On 2019-06-11 21:18, Frank Tang wrote:
>
> Hi Engineering community,
> I'm trying to find information regard tilt testing, such as minimal tilt
> angle based on system weight, how to safely perform this test, etc; can
> someone direct me to site(s) or standards I can reference?
> Google for once isn't helping.
>
> --
> Thank you and best regards.
> - Frank
> -
> 
>
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to <
> emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website: http://www.ieee-pses.org/
> Instructions: http://www.ieee-pses.org/list.html (including how to
> unsubscribe) 
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
> Scott Douglas 
> Mike Cantwell 
>
> For policy questions, send mail to:
> Jim Bacher 
> David Heald 
>
> -
> 
>
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to 
> emc-p...@ieee.org
>
> All emc-pstc postings are archived and searchable on the web at:
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>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website: http://www.ieee-pses.org/
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>


-- 

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01

-

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Re: [PSES] Tilt test

2019-06-11 Thread John Woodgate

Clause 8.6 of IEC 62368-1. I don' t know if the UL version differs.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2019-06-11 21:18, Frank Tang wrote:

Hi Engineering community,
I'm trying to find information regard tilt testing, such as minimal 
tilt angle based on system weight, how to safely perform this test, 
etc; can someone direct me to site(s) or standards I can reference?

Google for once isn't helping.

--
Thank you and best regards.
- Frank
-


This message is from the IEEE Product Safety Engineering Society 
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e-mail to mailto:emc-p...@ieee.org>>


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[PSES] Tilt test

2019-06-11 Thread Frank Tang
Hi Engineering community,I'm trying to find information regard tilt testing, 
such as minimal tilt angle based on system weight, how to safely perform this 
test, etc; can someone direct me to site(s) or standards I can reference?Google 
for once isn't helping.
--
Thank you and best regards.
- Frank

-

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discussion list. To post a message to the list, send your e-mail to 


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Re: [PSES] HP 8753B Vector Network Analyzer

2019-06-11 Thread Edward Price
Richard:

The rabbit hole goes even deeper. Take a look at YouTube, where I found about 
40 videos involving various versions of the 8753. You mentioned that the one 
you have has “hard to push keys.” Perhaps this video will embolden you to have 
a look inside:

https://www.youtube.com/watch?v=-Jx2pcWIHXA

Also, here’s a video about HP sticky buttons (but on a frequency counter, but 
maybe that’s close enough):

https://www.youtube.com/watch?v=Ahxx9wWEdqU

Finally, you might start searching YouTube & eBay for an 8753B front panel 
assembly.

All else failing, consider having a laptop talk to your instrument through its 
IEEE-488 port; you can usually control most every front-panel function through 
the port. I have some HP virtual instrument BASIC code examples that I can give 
you.

Good Luck!

Ed Price
WB6WSN
Chula Vista, CA USA

From: Richard Marshall [mailto:richard.marshal...@btinternet.com]
Sent: Tuesday, June 11, 2019 2:16 AM
To: Ken Javor; EMC-PSTC@listserv.ieee.org; Edward Price
Subject: Re[2]: [PSES] HP 8753B Vector Network Analyser

Thank you both.

You gave me the confidence to make a low offer to the Israeli vendor - and to 
my surprise it was accepted !

The VNA has now been delivered here in the UK safely.   So far it seems to 
behave exactly as described on EBAY - including the push-buttons that need to 
be pressed hard - but with the surprise bonus of a bright and sharp display.

Thanks again


Richard

Richard Marshall Laboratories,
30 Ox Lane, Harpenden, Herts.,AL5 4HE, UK
+44 (0)1582 460815 www.design-emc.co.uk
Member of the EMC Industry Association



-- Original Message --
From: "Ken Javor" 
mailto:ken.ja...@emccompliance.com>>
To: EMC-PSTC@listserv.ieee.org
Sent: 23/05/2019 17:31:26
Subject: Re: [PSES] HP 8753B Vector Network Analyser

That’s where I got mine...

Ken Javor
Phone: (256) 650-5261


From: Edward Price mailto:e...@jwjelp.com>>
Reply-To: Edward Price mailto:e...@jwjelp.com>>
Date: Thu, 23 May 2019 14:38:13 +
To: mailto:EMC-PSTC@LISTSERV.IEEE.ORG>>
Conversation: [PSES] HP 8753B Vector Network Analyser
Subject: Re: [PSES] HP 8753B Vector Network Analyser

Richard:

Take a look at eBay. I see about 20 used 8753B’s, with one in Israel for about 
$1100.


Ed Price
WB6WSN
Chula Vista, CA USA


From: Richard Marshall [mailto:0aeebd4dc3f4-dmarc-requ...@ieee.org]
Sent: Thursday, May 23, 2019 3:37 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] HP 8753B Vector Network Analyser

Hi All,



I have damaged the "rf output" circuitry of my Vintage HP 8753B Vector Network 
Analyser, I think by ESD.

Now I must scrap the much-loved instrument - manufacturedJune 1988 -unless I 
can acquire a replacement A3 source module.  But these are now rare!



Does anyone have an abandoned HP8753B - this is the early version with only a 
mono vector-format display - that could provide me with a replacement source 
module?



I could drive to collect a complete Instrument from within the UK, or provide 
dis-assembly instructions and pay shipment cost of an A3 module world-wide.



Please check in forgotten corners!



Cheers,





Richard Marshall  G3SBA

Richard Marshall Laboratories,
30 Ox Lane, Harpenden, Herts.,AL5 4HE, UK
+44 (0)1582 460815 www.design-emc.co.uk 

Member of the EMC Industry Association







 

 Virus-free. www.avg.com 

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This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
mailto:emc-p...@ieee.org> 
 >

All emc-pstc postings are archived and searchable on the web at: 
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Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ 

  can be used for graphics (in well-used formats), large files, etc.

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List rules: 

Re: [PSES] HP 8753B Vector Network Analyser

2019-06-11 Thread Richard Marshall

Thank you both.

You gave me the confidence to make a low offer to the Israeli vendor -
and to my surprise it was accepted !

The VNA has now been delivered here in the UK safely.   So far it seems
to behave exactly as described on EBAY - including the push-buttons that
need to be pressed hard - but with the surprise bonus of a bright and
sharp display.

Thanks again


Richard



Richard Marshall Laboratories,

30 Ox Lane, Harpenden, Herts.,AL5 4HE, UK

+44 (0)1582 460815 www.design-emc.co.uk

Member of the EMC Industry Association





-- Original Message --
From: "Ken Javor" 
To: EMC-PSTC@listserv.ieee.org
Sent: 23/05/2019 17:31:26
Subject: Re: [PSES] HP 8753B Vector Network Analyser


That’s where I got mine...

Ken Javor
Phone: (256) 650-5261



From: Edward Price 
Reply-To: Edward Price 
Date: Thu, 23 May 2019 14:38:13 +
To: 
Conversation: [PSES] HP 8753B Vector Network Analyser
Subject: Re: [PSES] HP 8753B Vector Network Analyser

Richard:

Take a look at eBay. I see about 20 used 8753B’s, with one in Israel
for about $1100.


Ed Price
WB6WSN
Chula Vista, CA USA


From: Richard Marshall [mailto:0aeebd4dc3f4-dmarc-requ...@ieee.org]
Sent: Thursday, May 23, 2019 3:37 AM
To:EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] HP 8753B Vector Network Analyser

Hi All,



I have damaged the "rf output" circuitry of my Vintage HP 8753B Vector
Network Analyser, I think by ESD.

Now I must scrap the much-loved instrument - manufacturedJune 1988
-unless I can acquire a replacement A3 source module.  But these are
now rare!



Does anyone have an abandoned HP8753B - this is the early version with
only a mono vector-format display - that could provide me with a
replacement source module?



I could drive to collect a complete Instrument from within the UK, or
provide dis-assembly instructions and pay shipment cost of an A3 module
world-wide.



Please check in forgotten corners!



Cheers,





Richard Marshall  G3SBA

Richard Marshall Laboratories,
30 Ox Lane, Harpenden, Herts.,AL5 4HE, UK
+44 (0)1582 460815
www.design-emc.co.uk

Member of the EMC Industry Association









Virus-free.
www.avg.com

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. To post a message to the list, send your
e-mail to mailto:emc-p...@ieee.org>
 >

All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html


Attachments are not permitted but the IEEE PSES Online Communities site
at
http://product-compliance.oc.ieee.org/
  can be used for graphics (in
well-used formats), large files, etc.

Website: http://www.ieee-pses.org/

Instructions: http://www.ieee-pses.org/list.html (including how to
unsubscribe)

List rules:
http://www.ieee-pses.org/listrules.html


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 >
David Heald mailto:dhe...@gmail.com>
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This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list. To post a message to the list, send your
e-mail to 

All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site
at http://product-compliance.oc.ieee.org/ can be used for graphics (in
well-used formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to
unsubscribe) 

List rules: http://www.ieee-pses.org/listrules.html

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