RE: [PSES] thermocouple tutorial
Acknowledged - placement of t/c is mucho very extremely important. Am careful about application technique and component selection, and is emphasized in company policy/procedure. FWIW, for my place of employment, the two big sources or error are isothermal routing of t/c wire and attachment technique of t/c bead. The long-term properties of plastics and insulation as 'systems' are well defined by UL1446, UL746B, IEC61857, and others. The assumption is that these standards are representative. Brian -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of ralph.mcdiar...@schneider-electric.com Sent: Thursday, October 27, 2011 11:18 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] thermocouple tutorial With instrument and connecting cables at room temperature, likely more than close enough to a "zone box". I suggest the thermocouple bead attachment method along with choice of bead placement likely far greater source of error that all other variables combined. I think industry in general obsesses over insulation temperature, since degradation of that material properties over time/temperature is surly an in-exact science. _ Ralph McDiarmid | Schneider Electric | Renewable Energies Business | CANADA | Regulatory Compliance Engineering From: Brian Oconnell To: EMC-PSTC@LISTSERV.IEEE.ORG List-Post: emc-pstc@listserv.ieee.org Date: 10/25/2011 12:26 PM Subject: [PSES] thermocouple tutorial Just found this in the archives of Electronics Cooling Journal. In some ways it is better tutorial than mine, but the 1% thermocouple accuracy can be improved due to modern instruments. Do not agree with the ambient temperature measurement technique due to the non-laminar nature of air flow. Have never used a 'zone box' - anyone else used this technique? 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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:
Re: [PSES] thermocouple tutorial
In message , dated Thu, 27 Oct 2011, ralph.mcdiar...@schneider-electric.com writes: >I think industry in general obsesses over insulation temperature, since >degradation of that material properties over time/temperature is surly >an in-exact science. It probably isn't for a very closely-specified material, but one man's 'PVC' is not another man's PVC. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK Some people who are peeling the finch of the financial crisis are thinking of biting a rook. - 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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:
Re: [PSES] thermocouple tutorial
With instrument and connecting cables at room temperature, likely more than close enough to a "zone box". I suggest the thermocouple bead attachment method along with choice of bead placement likely far greater source of error that all other variables combined. I think industry in general obsesses over insulation temperature, since degradation of that material properties over time/temperature is surly an in-exact science. ___ _ Ralph McDiarmid | Schneider Electric | Renewable Energies Business | CANADA | Regulatory Compliance Engineering From: Brian Oconnell To: EMC-PSTC@LISTSERV.IEEE.ORG List-Post: emc-pstc@listserv.ieee.org Date: 10/25/2011 12:26 PM Subject: [PSES] thermocouple tutorial Just found this in the archives of Electronics Cooling Journal. In some ways it is better tutorial than mine, but the 1% thermocouple accuracy can be improved due to modern instruments. Do not agree with the ambient temperature measurement technique due to the non-laminar nature of air flow. Have never used a 'zone box' - anyone else used this technique? 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://product-compliance.oc.ieee.org/ http://product-compliance.oc.ieee.org/> Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> Instructions: http://listserv.ieee.org/request/user-guide.html <http://listserv.ieee.org/request/user-guide.html> List rules: http://www.ieee-pses.org/listrules.html <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 email has been scanned by the MessageLabs Email Security System. __ - 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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
thermocouple tutorial
Just found this in the archives of Electronics Cooling Journal. In some ways it is better tutorial than mine, but the 1% thermocouple accuracy can be improved due to modern instruments. Do not agree with the ambient temperature measurement technique due to the non-laminar nature of air flow. Have never used a 'zone box' - anyone else used this technique? 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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:
RE: thermocouple tutorial
Hi Brian, As I was not in attendance at PSES symposium so you could not have lost my card and not sure that I meet the good person status, is there any other way to qualify for your tutorial? Thanks Rick -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Thursday, October 13, 2011 2:31 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: thermocouple tutorial To the good people that gave me their business cards at the PSES symposium (on Tuesday) for a copy my t/c construction tutorial - I lost them. Sorry. If you want it, send me your email address. 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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 All emc-pstc postings are archived and searchable on the web at: http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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:
thermocouple tutorial
To the good people that gave me their business cards at the PSES symposium (on Tuesday) for a copy my t/c construction tutorial - I lost them. Sorry. If you want it, send me your email address. 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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:
