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Old August 8th 03, 07:20 PM
Chris1
 
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In article , "Michael A. Terrell" wrote:

I find that very interesting, since every chocolate bar I have ever
had was wrapped in aluminum foil.


I always thought it was just shiny paper. There's not much Aluminum there,
if any.

Chris
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Old August 9th 03, 06:19 AM
Michael A. Terrell
 
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Chris1 wrote:

In article , "Michael A. Terrell" wrote:

I find that very interesting, since every chocolate bar I have ever
had was wrapped in aluminum foil.


I always thought it was just shiny paper. There's not much Aluminum there,
if any.

Chris


A very thin aluminum foil, with a paper backing. Use an Ohm meter on
a piece to see that it is conductive.
--


Its August 5, 2003, so I'm 51 today!
Michael A. Terrell
Central Florida
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Old August 11th 03, 01:47 AM
Tom Del Rosso
 
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Watson A.Name - 'Watt Sun' wrote:

I used to be able to do that with the nickle plated antistatic bags
that parts came in back in 1980. The ohmmeter would measure several
hundred ohms. But nowadays all I can measure is an open. I just
tried it again, measured open even on the 200M range.


Yeah, it's been like that for at least 15 years. Anti-static work mats
aren't conductive either. So what principle do they use?

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Old August 11th 03, 03:26 AM
Sir Charles W. Shults III
 
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Actually, they ARE supposed to be conductive- at least to the tune of about
a megohm. In any operation that is serious about antistatic procedures, the
mats, wrist straps, and other equipment are to be tested periodically. Most
testers show if a mat reads open right away.
If you have mats or other equipment that read open, then you have found
defective hardware. Trash it.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip




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Old August 11th 03, 07:35 AM
Tom Del Rosso
 
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Sir Charles W. Shults III wrote:
Actually, they ARE supposed to be conductive- at least to the
tune of about a megohm. In any operation that is serious about
antistatic procedures, the mats, wrist straps, and other equipment
are to be tested periodically. Most testers show if a mat reads open
right away. If you have mats or other equipment that read open,
then you have found defective hardware. Trash it.


A mega-ohm per what unit of distance? From any point on the mat to the
ground point?


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Old August 11th 03, 07:54 AM
Sir Charles W. Shults III
 
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Actually, I should have said a megohm for a ground strap and 10 megohms or
so per square for mats. Since they are by area and not linear, the
specification has to be per square.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip


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Old August 11th 03, 07:54 AM
Sir Charles W. Shults III
 
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Actually, I should have said a megohm for a ground strap and 10 megohms or
so per square for mats. Since they are by area and not linear, the
specification has to be per square.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip


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Old August 11th 03, 07:35 AM
Tom Del Rosso
 
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Sir Charles W. Shults III wrote:
Actually, they ARE supposed to be conductive- at least to the
tune of about a megohm. In any operation that is serious about
antistatic procedures, the mats, wrist straps, and other equipment
are to be tested periodically. Most testers show if a mat reads open
right away. If you have mats or other equipment that read open,
then you have found defective hardware. Trash it.


A mega-ohm per what unit of distance? From any point on the mat to the
ground point?


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Old August 11th 03, 03:26 AM
Sir Charles W. Shults III
 
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Actually, they ARE supposed to be conductive- at least to the tune of about
a megohm. In any operation that is serious about antistatic procedures, the
mats, wrist straps, and other equipment are to be tested periodically. Most
testers show if a mat reads open right away.
If you have mats or other equipment that read open, then you have found
defective hardware. Trash it.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip




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