RE: Spectrum Analyzer Repair
Check out eBay. You may get lucky and find what you need. JP Hare From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of John Harrington Sent: Thursday, April 22, 2004 4:55 PM To: 'emc-p...@ieee.org' Subject: Spectrum Analyzer Repair Can anyone recommend a repair lab for agilent spectrum analyzers. Specifically, the GPIB interface needs repairing or replacing. Thanks John Harrington EMC Technical Manager F-Squared Laboratories Phone: 440 834 8926 ext 203 Fax: 440 834 8914 Cell: 440 832 0558 This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Spectrum Analyzer Repair
Can anyone recommend a repair lab for agilent spectrum analyzers. Specifically, the GPIB interface needs repairing or replacing. Thanks John Harrington EMC Technical Manager F-Squared Laboratories Phone: 440 834 8926 ext 203 Fax: 440 834 8914 Cell: 440 832 0558 This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: ESD Gun Verification between calibrations
That actually works. Just zap the inside of your arm and measure the welt. -Original Message- From: drcuthb...@micron.com [mailto:drcuthb...@micron.com] Sent: Thu 4/22/2004 11:18 AM To: ian.gor...@bocedwards.com; kevinharr...@dsc.com Cc: emc-p...@ieee.org Subject: RE: ESD Gun Verification between calibrations I often test 9 volt batteries with my tongue. A similar technique can be used to test the ESD gun. Just discharge it to your arm and gage the performance by how it feels. Just kidding, sort of. Dave Cuthbert -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of Gordon,Ian Sent: Thursday, April 22, 2004 1:46 AM To: Kevin Harris Cc: EMC-PSTC (emc-p...@ieee.org) Subject: RE: ESD Gun Verification between calibrations Kevin You are only verifying that the equipment is working so there is no need to check absolute levels or waveforms etc, that is the function of the calibration. Our EMC lab has been assessed to ISO 17025 by TUV International and they are satisfied with the following procedure which is extracted from our EMC lab Quality Manual. In our in-house EMC reports (which TUV are prepared to endorse) we record the latest date of calibration. Following the next calibration we assess whether there is a requirement to repeat any work based on the outcome of that calibration i.e. if the device is outside the manufacturers specification we repeat the work performed in the intervening period. 1. EQUIPMENT USED FOR BS EN 61000-4-2 a)Electro-static discharge gun S/N: 2494 In house equipment No. 9853-22-998 METHOD: 1. Configure item a as per section 6.5 of EMC lab instruction manual. (Details configuration as per manufacturers instructions) 2. Set the ESD gun to 8kV air discharge, single shot. 3. Attempt to discharge the gun to the insulating block (a block of wood 100 x 150 x 700mm) on the earth plane. 4. Check that a discharge did not occur by observing no audible signal from the gun and the display of the gun indicates 0.0kV. 5. Attempt to discharge the gun to the earth plane. 6. Check that a discharge did occur by observing an audible signal from the gun and the display of the gun indicates over 6kV. 7. Update the Equipment checklist spreadsheet to show that these pieces of equipment are functioning correctly. Ian Gordon -Original Message- From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 21 April 2004 20:51 To: Kevin Harris; EMC-PSTC (emc-p...@ieee.org) Subject: Re: ESD Gun Verification between calibrations Never done this before, so this is shooting from the hip. If you have a receiver, as opposed to an analyzer, you could, using sufficient attenuation, drive the input directly or using some transducer to measure the spectral signature from dc to daylight right after calibration, and run checks against that for intermediate checks. If you have an analyzer with even rudimentary preselection, you can do the same. Obviously you would have to use the max hold function and run multiple shots. I don't know how fast those things recharge - if it takes a long time that would make this technique impractical. From: Kevin Harris kevinharr...@dsc.com Reply-To: Kevin Harris kevinharr...@dsc.com Date: Wed, 21 Apr 2004 11:51:04 -0400 To: EMC-PSTC (emc-p...@ieee.org) emc-p...@ieee.org Subject: ESD Gun Verification between calibrations Dear Colleagues, We are in the process of moving some of the ESD testing we currently do (as pre-compliance to formal testing at an agency or test house) to formal testing under a laboratory accreditation program. In that regard, the issue of verification of the ESD gun's performance has come up between calibration cycles. Short of spending a lot of coin on a scope with a very fast one shot capture and running the formal calibration test as a method of periodic verification, does anyone have some suggestions for alternative methods that aren't so expensive but
RE: ESD Gun Verification between calibrations
I often test 9 volt batteries with my tongue. A similar technique can be used to test the ESD gun. Just discharge it to your arm and gage the performance by how it feels. Just kidding, sort of. Dave Cuthbert From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of Gordon,Ian Sent: Thursday, April 22, 2004 1:46 AM To: Kevin Harris Cc: EMC-PSTC (emc-p...@ieee.org) Subject: RE: ESD Gun Verification between calibrations Kevin You are only verifying that the equipment is working so there is no need to check absolute levels or waveforms etc, that is the function of the calibration. Our EMC lab has been assessed to ISO 17025 by TUV International and they are satisfied with the following procedure which is extracted from our EMC lab Quality Manual. In our in-house EMC reports (which TUV are prepared to endorse) we record the latest date of calibration. Following the next calibration we assess whether there is a requirement to repeat any work based on the outcome of that calibration i.e. if the device is outside the manufacturers specification we repeat the work performed in the intervening period. 1. EQUIPMENT USED FOR BS EN 61000-4-2 a)Electro-static discharge gun S/N: 2494 In house equipment No. 9853-22-998 METHOD: 1. Configure item a as per section 6.5 of EMC lab instruction manual. (Details configuration as per manufacturers instructions) 2. Set the ESD gun to 8kV air discharge, single shot. 3. Attempt to discharge the gun to the insulating block (a block of wood 100 x 150 x 700mm) on the earth plane. 4. Check that a discharge did not occur by observing no audible signal from the gun and the display of the gun indicates 0.0kV. 5. Attempt to discharge the gun to the earth plane. 6. Check that a discharge did occur by observing an audible signal from the gun and the display of the gun indicates over 6kV. 7. Update the Equipment checklist spreadsheet to show that these pieces of equipment are functioning correctly. Ian Gordon From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 21 April 2004 20:51 To: Kevin Harris; EMC-PSTC (emc-p...@ieee.org) Subject: Re: ESD Gun Verification between calibrations Never done this before, so this is shooting from the hip. If you have a receiver, as opposed to an analyzer, you could, using sufficient attenuation, drive the input directly or using some transducer to measure the spectral signature from dc to daylight right after calibration, and run checks against that for intermediate checks. If you have an analyzer with even rudimentary preselection, you can do the same. Obviously you would have to use the max hold function and run multiple shots. I don't know how fast those things recharge - if it takes a long time that would make this technique impractical. From: Kevin Harris kevinharr...@dsc.com Reply-To: Kevin Harris kevinharr...@dsc.com List-Post: emc-pstc@listserv.ieee.org Date: Wed, 21 Apr 2004 11:51:04 -0400 To: EMC-PSTC (emc-p...@ieee.org) emc-p...@ieee.org Subject: ESD Gun Verification between calibrations Dear Colleagues, We are in the process of moving some of the ESD testing we currently do (as pre-compliance to formal testing at an agency or test house) to formal testing under a laboratory accreditation program. In that regard, the issue of verification of the ESD gun's performance has come up between calibration cycles. Short of spending a lot of coin on a scope with a very fast one shot capture and running the formal calibration test as a method of periodic verification, does anyone have some suggestions for alternative methods that aren't so expensive but would still satisfy an accreditor as being a reasonable approach. Thanks Kind Regards, Kevin Harris Manager, Approvals Group Digital Security Controls 3301 Langstaff Road Concord, Ontario CANADA L4K 4L2 Tel: +1 905 760 3000 Ext. 2378 Fax +1 905 760 3020 Email: kevinharr...@dsc.com _ This e-mail has been scanned for viruses by MCI's Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.mci.com *** This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the BOC Group plc or any of its affiliates. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please return the message to the sender by replying to it and then delete the message from your computer. This footnote also confirms that this email message has been checked by
Re: ESD Gun Verification between calibrations
In a message dated 4/22/2004 11:07:57 AM Central Daylight Time, kurt.fisc...@hyperinterop.com writes: Kevin, You actually have 2 seperate issues: 1. The verification (or calibration) of the ESD simulator which must be performed per the 61000-4-2 standard (either internally or externally). 2. The quality assurance checks per 17025 of the ESD Simulator and ESD setup. This could be the same as #1 if your organization has the internal capabilities to perform the verification. Different ESD simulators have different failure modes so you may wish to consult with the ESD Simulator manufacturer or check the User's manual to determine what is appropriate. Good Luck! Kurt Fischer From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Kevin Harris Sent: Wednesday, April 21, 2004 8:51 AM To: EMC-PSTC (emc-p...@ieee.org) Subject: ESD Gun Verification between calibrations Dear Colleagues, We are in the process of moving some of the ESD testing we currently do (as pre-compliance to formal testing at an agency or test house) to formal testing under a laboratory accreditation program. In that regard, the issue of verification of the ESD gun's performance has come up between calibration cycles. Short of spending a lot of coin on a scope with a very fast one shot capture and running the formal calibration test as a method of periodic verification, does anyone have some suggestions for alternative methods that aren't so expensive but would still satisfy an accreditor as being a reasonable approach. Thanks Kind Regards, Kevin Harris Manager, Approvals Group Digital Security Controls 3301 Langstaff Road Concord, Ontario CANADA L4K 4L2 Tel: +1 905 760 3000 Ext. 2378 Fax +1 905 760 3020 Email: kevinharr...@dsc.com Hi, Kurt indicates a big flaw in this whole thing. In the USA, Calibration = Validation They should NOT be the same. Validation should be a quick check, not a calibration. Why on earth would equipment be sent for cal in the first place, if the lab had to do it again periodically between calibrations. Dumb, but until the definition is changed, we are stuck with it. If a lab is being able to call a quick check validation by their accrediting body, this needs to be passed on to me: the one I am familiar with does not. Help me provide objective evidence so I can help drive consistent assessments. Cheers, Derek N. Walton Owner, L F Research EMI Design and Test Facility Poplar Grove, IL 61065
EN/IEC 61326 Harmonized Standard for Laboratory Equipment
EMC/PSTC'ers, What are the differences (if any) between IEC 61326:2002 and IEC 61326:1997 +A1:1998 +A2:2000? The title page on the 2002 edition shows First edition 2002-02 Electrical equipment for measurement, control and laboratory use - EMC requirements. The December 11, 2003 issue (C271) of the Official Journal of the European Union (OJ) lists EN 61326:1997 +A1:1998 +A2:2001 as a Harmonized Standard under the EMC Directive. The references show that this EN standard is identical to IEC 61326:1997 +A1:1998 +A2:2000. We bought IEC 61326, and received the 2002 version, which on page 7 says This standard cancels and replaces the first edition of IEC 61326-1 published in 1997, its amendment 1 (1998) and its amendment 2 (2000) and constitutes a technical revision. The text of this standard is based on the following documents: FDIS Report on Voting 85A/345/FDIS 65A/348/RVD Thanks! John Barnes KS4GL, PE, NCE, ESDC Eng, SM IEEE dBi Corporation http://www.dbicorporation.com/ This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: ESD Gun Verification between calibrations
Kevin, You actually have 2 seperate issues: 1. The verification (or calibration) of the ESD simulator which must be performed per the 61000-4-2 standard (either internally or externally). 2. The quality assurance checks per 17025 of the ESD Simulator and ESD setup. This could be the same as #1 if your organization has the internal capabilities to perform the verification. Different ESD simulators have different failure modes so you may wish to consult with the ESD Simulator manufacturer or check the User's manual to determine what is appropriate. Good Luck! Kurt Fischer From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Kevin Harris Sent: Wednesday, April 21, 2004 8:51 AM To: EMC-PSTC (emc-p...@ieee.org) Subject: ESD Gun Verification between calibrations Dear Colleagues, We are in the process of moving some of the ESD testing we currently do (as pre-compliance to formal testing at an agency or test house) to formal testing under a laboratory accreditation program. In that regard, the issue of verification of the ESD gun's performance has come up between calibration cycles. Short of spending a lot of coin on a scope with a very fast one shot capture and running the formal calibration test as a method of periodic verification, does anyone have some suggestions for alternative methods that aren't so expensive but would still satisfy an accreditor as being a reasonable approach. Thanks Kind Regards, Kevin Harris Manager, Approvals Group Digital Security Controls 3301 Langstaff Road Concord, Ontario CANADA L4K 4L2 Tel: +1 905 760 3000 Ext. 2378 Fax +1 905 760 3020 Email: kevinharr...@dsc.com
Re: Calculating/predicting Quasi-peak of a single pulse
John- The general transfer function for a mass-spring-damp (as the mechanical meter) (or R-L-C) is of the form: (s + 2dw)/(s^2 + 2dws + w^2) where w = natural frequency of system and d = damping ratio (dimensionless) For critical damping as per the USA definition, d = 1, and there are two real poles on top of each other at -dw (or -w, since d = 1). For critical damping as defined for the meter used in the quasi-peak measurement, d = 0.707. This produces two complex poles at -dw +- jw*sqrt(1 - d^2), with the real and imaginary parts having the same magnitude. Thus lines drawn from the origin to the poles lie at angles 135 deg and 225 degrees, or +-45 degrees off of the negative real axis. I realize this is a bit murky, but I hope it works. At the time I was reviewing all of this, the legacy issues were not stated explicitly, so I was confronted with calculated responses that did not exactly match measurements, and also additional circuitry in the electronic quasi-peak measurement box that I could not explain. Perhaps this is now clearly stated. Don Borowski Schweitzer Engineering Labs Pullman, WA John Woodgate j...@jmwa.demon.co.uk wrote on 04/21/2004 12:28:29 PM: I read in !emc-pstc that don_borow...@selinc.com wrote (in OF203F306B.F 7eea869-on88256e7d.00508cf6-88256e7d.00523...@selinc.com) about 'Calculating/predicting Quasi-peak of a single pulse' on Wed, 21 Apr 2004: The (mechanical) indicator issue is a bit more complex than Mr. Gremmen states. The indicator is to be critically damped, as the definition is understood in Europe, which is that the transfer function (electrical input to mechanical output) has two poles in the left half-plane, 45 degrees off of the real axis. In this definition, there is some overshoot to a step function. Note that this is different than the definition as usually understood in the USA, where it is taken to mean that there are two poles on top of each other in the left half plane, on the real axis. This condition gives the quickest response to a step input without any overshoot. Could you please give the s-plane transfer functions that show the difference between the EU and US terminology? Even with this, there will still be a few tens of a dB difference in the calculated vs. actual response. Early in the development by HP of a quasi-peak adaptor for their spectrum analyzer, they found that there was some discrepancy between the response of their electronic metering circuit and the indication given by the meter on the Rhode Schwarz quasi-peak box (which was industry standard at the time). HP carefully measured the actual response of the mechanical meter and added some circuitry to mimic it. This is a well-known 'legacy issue', where the arcane properties of pointer instruments have been assimilated into the specifications of measuring devices. Digital indicators have to be 'kludged' to simulate the 'defects' of the mechanical instruments. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: ESD Gun Verification between calibrations
Kevin: There is a presentation regarding ESD on the RAFT website, it may be of some help as it does talk about calibration. It is titled ESD Today www.raft-global.org Regards: Kevin Keegan Senior Associate KES Associates 1 Stonecroft Terrace Kanata, Ontario Canada K2K 2V1 Tel: 613-592-0820 Email: kkee...@kesandassociates.com Web: http://www.kesandassociates.com Regulatory Approval Forum Chairperson www.raft-global.org IMPORTANT NOTICE: This email is intended only for the individual or entity to which it is specifically addressed and should not be read by, or delivered to, any other person. Such material may contain privileged or confidential information, the disclosure or other use of which by other than the intended recipient may result in the breach of certain laws or the infringement of rights of third parties. If you have received this email in error, please delete it immediately and notify the sender. I thank you in advance for your co- operation and assistance. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: ESD Gun Verification between calibrations
Kevin You are only verifying that the equipment is working so there is no need to check absolute levels or waveforms etc, that is the function of the calibration. Our EMC lab has been assessed to ISO 17025 by TUV International and they are satisfied with the following procedure which is extracted from our EMC lab Quality Manual. In our in-house EMC reports (which TUV are prepared to endorse) we record the latest date of calibration. Following the next calibration we assess whether there is a requirement to repeat any work based on the outcome of that calibration i.e. if the device is outside the manufacturers specification we repeat the work performed in the intervening period. 1. EQUIPMENT USED FOR BS EN 61000-4-2 a)Electro-static discharge gun S/N: 2494 In house equipment No. 9853-22-998 METHOD: 1. Configure item a as per section 6.5 of EMC lab instruction manual. (Details configuration as per manufacturers instructions) 2. Set the ESD gun to 8kV air discharge, single shot. 3. Attempt to discharge the gun to the insulating block (a block of wood 100 x 150 x 700mm) on the earth plane. 4. Check that a discharge did not occur by observing no audible signal from the gun and the display of the gun indicates 0.0kV. 5. Attempt to discharge the gun to the earth plane. 6. Check that a discharge did occur by observing an audible signal from the gun and the display of the gun indicates over 6kV. 7. Update the Equipment checklist spreadsheet to show that these pieces of equipment are functioning correctly. Ian Gordon From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 21 April 2004 20:51 To: Kevin Harris; EMC-PSTC (emc-p...@ieee.org) Subject: Re: ESD Gun Verification between calibrations Never done this before, so this is shooting from the hip. If you have a receiver, as opposed to an analyzer, you could, using sufficient attenuation, drive the input directly or using some transducer to measure the spectral signature from dc to daylight right after calibration, and run checks against that for intermediate checks. If you have an analyzer with even rudimentary preselection, you can do the same. Obviously you would have to use the max hold function and run multiple shots. I don't know how fast those things recharge - if it takes a long time that would make this technique impractical. From: Kevin Harris kevinharr...@dsc.com Reply-To: Kevin Harris kevinharr...@dsc.com List-Post: emc-pstc@listserv.ieee.org Date: Wed, 21 Apr 2004 11:51:04 -0400 To: EMC-PSTC (emc-p...@ieee.org) emc-p...@ieee.org Subject: ESD Gun Verification between calibrations Dear Colleagues, We are in the process of moving some of the ESD testing we currently do (as pre-compliance to formal testing at an agency or test house) to formal testing under a laboratory accreditation program. In that regard, the issue of verification of the ESD gun's performance has come up between calibration cycles. Short of spending a lot of coin on a scope with a very fast one shot capture and running the formal calibration test as a method of periodic verification, does anyone have some suggestions for alternative methods that aren't so expensive but would still satisfy an accreditor as being a reasonable approach. Thanks Kind Regards, Kevin Harris Manager, Approvals Group Digital Security Controls 3301 Langstaff Road Concord, Ontario CANADA L4K 4L2 Tel: +1 905 760 3000 Ext. 2378 Fax +1 905 760 3020 Email: kevinharr...@dsc.com _ This e-mail has been scanned for viruses by MCI's Internet Managed Scanning Services - powered by MessageLabs. For further information visit http://www.mci.com *** This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the BOC Group plc or any of its affiliates. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please return the message to the sender by replying to it and then delete the message from your computer. This footnote also confirms that this email message has been checked by anti-virus software for the presence of computer viruses. However, the BOC Group plc or any of its affiliates accepts no responsibility for any virus or defect that might arise from opening this e-mail or attachments. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: majord...@ieee.org with the single line:
