Re: [PSES] How to Measure Surface Conductivity?

[T.Sato]

On Tue, 11 Apr 2023 15:45:29 -0400,
  Brian Kunde  wrote:

> I have been given two samples of metal plates; one plated in our current
> material and the other with a new plating material we want to switch to in
> production.  I have been tasked to compare the electrical surface
> conductivity.
> 
> What is the best way to do this?  How is this done in the industry?
> 
> I have tried the following methods;
> 1. DMM (Ohm Meter) = inconclusive results
> 2. Used 5 volts from a current limited power supply and measured the
> current = inconclusive results
> 3. Used our Ground Bond Tester set to 60 amps. One plate measured 3-4mΩ,
> the other 1-3mΩ

If you want to ignore the contact resistance, did you tried four-point
probe method?

https://www.suragus.com/en/technology/four-point-probe/

Regards,
Tom

-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

Re: [PSES] How to Measure Surface Conductivity?

[Stultz, Mark]

Hi Brian,
You may want to consider repeating test #3 after environmental conditioning.  
The true test of a plating is corrosion resistance over time.

Best of luck,

Mark Stultz | CMSE | Sealed Air | Automated Packaging Systems | Streetsboro, 
OH | 330-342-2402

From: Brian Kunde 
Sent: Tuesday, 11 April, 2023 3:45 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] How to Measure Surface Conductivity?


 CAUTION: This email originated from outside of the organization. Do not click 
links or open attachments unless you recognize the sender and know the content 
is safe.

I have been given two samples of metal plates; one plated in our current 
material and the other with a new plating material we want to switch to in 
production.  I have been tasked to compare the electrical surface conductivity.

What is the best way to do this?  How is this done in the industry?

I have tried the following methods;
1. DMM (Ohm Meter) = inconclusive results
2. Used 5 volts from a current limited power supply and measured the current = 
inconclusive results
3. Used our Ground Bond Tester set to 60 amps. One plate measured 3-4mΩ, the 
other 1-3mΩ

I measured 1 inch apart and from corner to corner. Test #3 above is the only 
test that showed any difference.

BTW, I use 3/4" squares of soft braid material between the probes and surface. 
The probes are zeroed out between tests.

So far, I can conclude that the new material is as good as, or slightly better 
than our current production plating material.

What more can I do, within reason?

Thanks to all.
The Other Brian
-


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<https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=05%7C01%7Cmark.stultz%40sealedair.com%7C95c231323dd74650650108db3ac55a56%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C638168391522028104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Cj%2BBWsbjnQ0FGcKdE2q%2FBthirKgV3fYDWXu7OMfXnMs%3D&reserved=0>

Website: 
http://www.ieee-pses.org/<https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=05%7C01%7Cmark.stultz%40sealedair.com%7C95c231323dd74650650108db3ac55a56%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C638168391522028104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=QDUUep6NDYuFNCMntHnphpun33KM6I6tDE%2BcF%2FXZMEk%3D&reserved=0>
Instructions: http://www.ieee-pses.org/list.html (including how to 
unsubscribe)<https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=05%7C01%7Cmark.stultz%40sealedair.com%7C95c231323dd74650650108db3ac55a56%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C638168391522028104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=neEV%2BYbI8jF7wP8xjAymfaUTLxK%2Bj%2F%2BtXriZreTLrPY%3D&reserved=0>
List rules: 
http://www.ieee-pses.org/listrules.html<https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=05%7C01%7Cmark.stultz%40sealedair.com%7C95c231323dd74650650108db3ac55a56%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C638168391522028104%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=wRxDEPhL7PQqGFAWhrrwoKTQ2ZQ3gyZRadW1nbfNLm4%3D&reserved=0>

For help, send mail to the list administrators:
Mike Cantwell mailto:mcantw...@ieee.org>>

For policy questions, send mail to:
Jim Bacher mailto:j.bac...@ieee.org>>
David Heald mailto:dhe...@gmail.com>>



To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

[PSES] Fw: Re: [PSES] How to Measure Surface Conductivity?

[Brian Gregory]

 Conductive epoxy bonding the probe to the surface?Calibrate with a current 
shunt. "Colorado" Brian 
720-450-4933

-- Forwarded Message --
From: Marko Radojicic <052300254e41-dmarc-requ...@listserv.ieee.org>
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] How to Measure Surface Conductivity?
Date: Tue, 11 Apr 2023 13:00:08 -0700


Try a conductive elastomer on the DMM probes. Intent is to not scratch the 
surface. 
 However from your description, new coating appears functionally equivalent 
especially if bonding mechanisms use any type of sharp edge (BeCu gasket, 
screw, etc)

Sent from my mobilePlease excuse brevity & grammar 
On Apr 11, 2023, at 12:45 PM, Brian Kunde  wrote:

I have been given two samples of metal plates; one plated in our current 
material and the other with a new plating material we want to switch to in 
production.  I have been tasked to compare the electrical surface conductivity. 
What is the best way to do this?  How is this done in the industry? I have 
tried the following methods;1. DMM (Ohm Meter) = inconclusive results2. Used 5 
volts from a current limited power supply and measured the current = 
inconclusive results3. Used our Ground Bond Tester set to 60 amps. One plate 
measured 3-4mΩ, the other 1-3mΩ I measured 1 inch apart and from 
corner to corner. Test #3 above is the only test that showed any difference.   
BTW, I use 3/4" squares of soft braid material between the probes and surface. 
The probes are zeroed out between tests.   So far, I can conclude that the new 
material is as good as, or slightly better than our current production plating 
material.   What more can I do, within reason? Thanks to all.The Other Brian-
 
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
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:
 Mike Cantwell 
For policy questions, send mail to:
 Jim Bacher 
 David Heald 
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
-
 
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
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:
 Mike Cantwell 
For policy questions, send mail to:
 Jim Bacher 
 David Heald 
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

Re: [PSES] How to Measure Surface Conductivity?

[Ken Javor]

I would measure ohms per square using a milliohm meter. Also, another
critical parameter is how hard the coating is. If the new coating is much
harder than the original, it will likely make for poorer conductivity at any
seams, resulting in lower shielding effectiveness even if the material
conductivity is similar.  A gasket might then be required where none was
previously.

Marko Radojicic¹s comment bears directly on this issue.  The connection
between probes and coatings should be identical, including applied pressure.
If more pressure needs to be applied to get good results, that is a measure
of the surface hardness.

Ken Javor
Phone: (256) 650-5261




From: Brian Kunde 
Reply-To: Brian Kunde 
Date: Tue, 11 Apr 2023 15:45:29 -0400
To: 
Subject: [PSES] How to Measure Surface Conductivity?

I have been given two samples of metal plates; one plated in our current
material and the other with a new plating material we want to switch to in
production.  I have been tasked to compare the electrical surface
conductivity.

What is the best way to do this?  How is this done in the industry?

I have tried the following methods;
1. DMM (Ohm Meter) = inconclusive results
2. Used 5 volts from a current limited power supply and measured the current
= inconclusive results
3. Used our Ground Bond Tester set to 60 amps. One plate measured 3-4m‡, the
other 1-3m‡

I measured 1 inch apart and from corner to corner. Test #3 above is the only
test that showed any difference.  

BTW, I use 3/4" squares of soft braid material between the probes and
surface. The probes are zeroed out between tests.  

So far, I can conclude that the new material is as good as, or slightly
better than our current production plating material.  

What more can I do, within reason?

Thanks to all.
The Other Brian
-


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

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to
unsubscribe) <http://www.ieee-pses.org/list.html>
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher  
David Heald 


 To unsubscribe from the EMC-PSTC list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1



-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

Re: [PSES] How to Measure Surface Conductivity?

[Marko Radojicic]

Try a conductive elastomer on the DMM probes. Intent is to not scratch the surface. However from your description, new coating appears functionally equivalent especially if bonding mechanisms use any type of sharp edge (BeCu gasket, screw, etc)Sent from my mobilePlease excuse brevity & grammar On Apr 11, 2023, at 12:45 PM, Brian Kunde  wrote:I have been given two samples of metal plates; one plated in our current material and the other with a new plating material we want to switch to in production.  I have been tasked to compare the electrical surface conductivity.What is the best way to do this?  How is this done in the industry?I have tried the following methods;1. DMM (Ohm Meter) = inconclusive results2. Used 5 volts from a current limited power supply and measured the current = inconclusive results3. Used our Ground Bond Tester set to 60 amps. One plate measured 3-4mΩ, the other 1-3mΩI measured 1 inch apart and from corner to corner. Test #3 above is the only test that showed any difference.  BTW, I use 3/4" squares of soft braid material between the probes and surface. The probes are zeroed out between tests.  So far, I can conclude that the new material is as good as, or slightly better than our current production plating material.  What more can I do, within reason?Thanks to all.The Other Brian
-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher  
David Heald 


 To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 
-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher  
David Heald 


 To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 

[PSES] How to Measure Surface Conductivity?

[Brian Kunde]

I have been given two samples of metal plates; one plated in our current
material and the other with a new plating material we want to switch to in
production.  I have been tasked to compare the electrical surface
conductivity.

What is the best way to do this?  How is this done in the industry?

I have tried the following methods;
1. DMM (Ohm Meter) = inconclusive results
2. Used 5 volts from a current limited power supply and measured the
current = inconclusive results
3. Used our Ground Bond Tester set to 60 amps. One plate measured 3-4mΩ,
the other 1-3mΩ

I measured 1 inch apart and from corner to corner. Test #3 above is the
only test that showed any difference.

BTW, I use 3/4" squares of soft braid material between the probes and
surface. The probes are zeroed out between tests.

So far, I can conclude that the new material is as good as, or slightly
better than our current production plating material.

What more can I do, within reason?

Thanks to all.
The Other Brian

-

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

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1