Re: [PSES] Exhaust fume hood recommendations
Brian - I'm looking to control smoke and fumes during component and other abnormal conditions, as well as UL 94 testing. Lots of food for thought. Thanks. Regards, Peter Tarver -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Friday, June 20, 2014 16:49 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Exhaust fume hood recommendations My boss immediately said that below was a Freudian slip. Should have been You would probably not get this additional functionality on the stuff intended for chem or bio labs. Brian -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Friday, June 20, 2014 4:37 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Exhaust fume hood recommendations My current hood is stainless steel, with a large bubble in the exhaust tube just above the hood. The bubble has fans fore and aft. The bottom lip of the hood is used to hang Lexan 'shields' on three sides; this is because I wanted them removable so that I can also use the underlying bench as normal test area when not torturing stuff. The back wall surface is covered with a sheet of galvanized metal and has latches for the lexan shields. Unless you run a very well-sealed hood area, fans must have a high volumetric rating. In any case, doubt that even the fans for a large computer would suffice for any type of setup. Fans for my hood are rated 120V or 208V, direct drive, fused and rated at least 500 cfm, and not anything special and are mounted to be easily replaced (seem to be replacing them about one per year), so do nothing for filtration, just vent the smoke to the outside smog. If the vent stack is very short, there could be a possibility of the exhaust having burning embers. Most commercial hood setups use a venturi or are centrifugal so can be difficult to service and replace. Look at fans in the Dayton or Grainger catalogs for ideas - decent exhaust fan assemblies will be at least $250 USD. But the commercial lab stuff is an order of magnitude more expensive. My set up is also useful for the Type Test on end- use equipment that could cause smoke emissions. You would probably not get this additional fun! ctionality on the stuff intended for chem or bio labs. If you want a portable setup to exhaust a small area just for UL94 stuff, build a metal box, about 1 cubic meter with inlet louvers at bottom, and use a bathroom exhaust assembly on the top. Or you could just put a steel bench in the parking lot behind the building... Brian -Original Message- From: Peter Tarver [mailto:ptar...@enphaseenergy.com] Sent: Friday, June 20, 2014 3:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Exhaust fume hood recommendations Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver - - --- 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.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 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
Re: [PSES] Exhaust fume hood recommendations
Doug – I’m familiar with those fans. They were used in a PBX system I was associated with in an alternate universe. Good variable speed control on them. I’m not sure I’ll need a spark arrestor, but I appreciate the reference. Regards, Peter Tarver *From:* Douglas Nix [mailto:d...@mac.com] *Sent:* Saturday, June 21, 2014 14:47 I’ve had excellent success with backward curved impellers for high-flow, low noise applications. EBM makes some great ones http://www.ebmpapst.com/en/products/centrifugal-fans/centrifugal_fans.html. Also, if you’re concerned about burning embers, consider adding a spark arrestor into the exhaust duct: http://www.qamanage.com/SparkArrestor This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
Good pointer, Rich. UL 94, §5.1 seems oriented at improving observation of the test. I had originally thought I might make a box out of polycarbonate. I either need to rethink that or add curtains or some low transmittance window film. I also need to consider a flame resistant table top surface. A simple stainless steel pan could transmit heat and create undesirable secondary effects.☺ An air gap might fix that, but then I need to come up with a good support system. Details, details ... Regards, Peter Tarver -Original Message- From: Richard Nute [mailto:ri...@ieee.org] Sent: Friday, June 20, 2014 16:27 Hi Peter: Since you will be doing flammability tests, see 5.1 of UL94 which has specifications for the fume hood. Note that during the flammability test, the hood is draft free while permitting normal thermal circulation of air past the specimen. Best regards, Rich This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
I’ve had excellent success with backward curved impellers for high-flow, low noise applications. EBM makes some great ones. http://www.ebmpapst.com/en/products/centrifugal-fans/centrifugal_fans.html Also, if you’re concerned about burning embers, consider adding a spark arrestor into the exhaust duct: http://www.qamanage.com/SparkArrestor Just my two cents. Doug Nix d...@ieee.org +1 519 729 5704 On 20-Jun-14, at 19:49, Brian Oconnell oconne...@tamuracorp.com wrote: My boss immediately said that below was a Freudian slip. Should have been You would probably not get this additional functionality on the stuff intended for chem or bio labs. Brian -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Friday, June 20, 2014 4:37 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Exhaust fume hood recommendations My current hood is stainless steel, with a large bubble in the exhaust tube just above the hood. The bubble has fans fore and aft. The bottom lip of the hood is used to hang Lexan 'shields' on three sides; this is because I wanted them removable so that I can also use the underlying bench as normal test area when not torturing stuff. The back wall surface is covered with a sheet of galvanized metal and has latches for the lexan shields. Unless you run a very well-sealed hood area, fans must have a high volumetric rating. In any case, doubt that even the fans for a large computer would suffice for any type of setup. Fans for my hood are rated 120V or 208V, direct drive, fused and rated at least 500 cfm, and not anything special and are mounted to be easily replaced (seem to be replacing them about one per year), so do nothing for filtration, just vent the smoke to the outside smog. If the vent stack is very short, there could be a possibility of the exhaust having burning embers. Most commercial hood setups use a venturi or are centrifugal so can be difficult to service and replace. Look at fans in the Dayton or Grainger catalogs for ideas - decent exhaust fan assemblies will be at least $250 USD. But the commercial lab stuff is an order of magnitude more expensive. My set up is also useful for the Type Test on end-use equipment that could cause smoke emissions. You would probably not get this additional fun! ctionality on the stuff intended for chem or bio labs. If you want a portable setup to exhaust a small area just for UL94 stuff, build a metal box, about 1 cubic meter with inlet louvers at bottom, and use a bathroom exhaust assembly on the top. Or you could just put a steel bench in the parking lot behind the building... Brian -Original Message- From: Peter Tarver [mailto:ptar...@enphaseenergy.com] Sent: Friday, June 20, 2014 3:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Exhaust fume hood recommendations Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.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 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
[PSES] Exhaust fume hood recommendations
Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
Peter, Other than looking for an approved device, look for recommended CFM ratings for the removal rates. Most home improvement stores have info on this. I purchased a squirrel cage fan which removed air quickly and is much quieter than a standard impeller type. My preference would be exhaust through the rooftop. Be aware that more powerful may not be better. There is actually building code that you cannot put negative pressure on a building if the fire egress doors open outward, which they should. If you need to remove a lot of air, you may also need to bring in a supply of outside air to keep the building equalized. If you are only removing smoke, you probably don't have to look into corrosion resistant fans. Thanks, - doug Douglas Powell http://www.linkedin.com/in/dougp01 Original Message From: Peter Tarver Sent: Friday, June 20, 2014 4:44 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Reply To: Peter Tarver Subject: [PSES] Exhaust fume hood recommendations Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.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 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
Hi Peter: Since you will be doing flammability tests, see 5.1 of UL94 which has specifications for the fume hood. Note that during the flammability test, the hood is draft free while permitting normal thermal circulation of air past the specimen. Best regards, Rich - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
My current hood is stainless steel, with a large bubble in the exhaust tube just above the hood. The bubble has fans fore and aft. The bottom lip of the hood is used to hang Lexan 'shields' on three sides; this is because I wanted them removable so that I can also use the underlying bench as normal test area when not torturing stuff. The back wall surface is covered with a sheet of galvanized metal and has latches for the lexan shields. Unless you run a very well-sealed hood area, fans must have a high volumetric rating. In any case, doubt that even the fans for a large computer would suffice for any type of setup. Fans for my hood are rated 120V or 208V, direct drive, fused and rated at least 500 cfm, and not anything special and are mounted to be easily replaced (seem to be replacing them about one per year), so do nothing for filtration, just vent the smoke to the outside smog. If the vent stack is very short, there could be a possibility of the exhaust having burning embers. Most commercial hood setups use a venturi or are centrifugal so can be difficult to service and replace. Look at fans in the Dayton or Grainger catalogs for ideas - decent exhaust fan assemblies will be at least $250 USD. But the commercial lab stuff is an order of magnitude more expensive. My set up is also useful for the Type Test on end-use equipment that could cause smoke emissions. You would probably not get this additional fun! ctionality on the stuff intended for chem or bio labs. If you want a portable setup to exhaust a small area just for UL94 stuff, build a metal box, about 1 cubic meter with inlet louvers at bottom, and use a bathroom exhaust assembly on the top. Or you could just put a steel bench in the parking lot behind the building... Brian -Original Message- From: Peter Tarver [mailto:ptar...@enphaseenergy.com] Sent: Friday, June 20, 2014 3:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Exhaust fume hood recommendations Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Exhaust fume hood recommendations
My boss immediately said that below was a Freudian slip. Should have been You would probably not get this additional functionality on the stuff intended for chem or bio labs. Brian -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Friday, June 20, 2014 4:37 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Exhaust fume hood recommendations My current hood is stainless steel, with a large bubble in the exhaust tube just above the hood. The bubble has fans fore and aft. The bottom lip of the hood is used to hang Lexan 'shields' on three sides; this is because I wanted them removable so that I can also use the underlying bench as normal test area when not torturing stuff. The back wall surface is covered with a sheet of galvanized metal and has latches for the lexan shields. Unless you run a very well-sealed hood area, fans must have a high volumetric rating. In any case, doubt that even the fans for a large computer would suffice for any type of setup. Fans for my hood are rated 120V or 208V, direct drive, fused and rated at least 500 cfm, and not anything special and are mounted to be easily replaced (seem to be replacing them about one per year), so do nothing for filtration, just vent the smoke to the outside smog. If the vent stack is very short, there could be a possibility of the exhaust having burning embers. Most commercial hood setups use a venturi or are centrifugal so can be difficult to service and replace. Look at fans in the Dayton or Grainger catalogs for ideas - decent exhaust fan assemblies will be at least $250 USD. But the commercial lab stuff is an order of magnitude more expensive. My set up is also useful for the Type Test on end-use equipment that could cause smoke emissions. You would probably not get this additional fun! ctionality on the stuff intended for chem or bio labs. If you want a portable setup to exhaust a small area just for UL94 stuff, build a metal box, about 1 cubic meter with inlet louvers at bottom, and use a bathroom exhaust assembly on the top. Or you could just put a steel bench in the parking lot behind the building... Brian -Original Message- From: Peter Tarver [mailto:ptar...@enphaseenergy.com] Sent: Friday, June 20, 2014 3:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Exhaust fume hood recommendations Hi. I'm doing some research and am looking for recommendations for fume hoods for abnormal condition testing for my lab. I have an opportunity to have an exhaust to outside air system and am looking for your thoughts on what has worked well for you in terms of cfm capacity and which manufacturers you've used. I'm thinking of a variable speed or at least multiple speed fan. Product types range from about the size of desktop feature phone to a large tower computer. I will likely also use the fume hood for flammability testing. I'm not interested in recirculating air types, since the filters can be expensive. Any insights you can give are solicited, even modifications you've made to improve performance or usability. Regards, Peter L. Tarver - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.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 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
