Several years ago I was called in to debug a chamber that had spurious emissions whilst turning the table. Naturally, everyone accused the tt manufacturer but after several hours of frustrating dead ends, it turned out that the small amount of vibration caused by the tt was causing the floor tiles to move and shift ever so slightly. This was enough for small amounts of static charge to develop and discharge causing the emissions in the chamber. Once this was ascertained, grounding the floor tiles eliminated the problem. We used copper tape under every tile folded over till the tile manufacturer came in with a permanent solution which included spring fingers. These metal lined tiles were for a false raised floor for cabling and a/c and not the ferrite types.
--- David Spencer <dspen...@oresis.com> wrote: > > Hi Arno, > John gave you the short answer...the MFG should have installation > instructions. In all of the installation I have been party, there is a grid > of copper tape laid down in the conductive adhesive. This keeps the > adhesive from getting excessively resistive over large areas. Surface > resistance tests run anywhere from 100k-400k ohms when it's all done. Note > that if you are installing relay racks or metal benches that you can run > into ground loops. > Have a Great Day, > Dave Spencer > Oresis Communications > > > -----Original Message----- > From: Arno van Kesteren > To: Arno van Kesteren; emc-p...@majordomo.ieee.org > Sent: 3/18/02 1:48 PM > Subject: Earthing of conductive floor tiles > > > Dear Group, > > Do conductive tiles in floors for ESD prevention have to be connected > together (e.g. through a low impedance earth bond) ? > > Arno van Kesteren > ESO > Munich, Germany > e-mail: avkes...@eso.org > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > 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: davehe...@mediaone.net > > 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://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > 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: davehe...@mediaone.net > > 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://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" ===== Best Regards Hans Mellberg Regulatory Compliance & EMC Design Services Consultant By the Pacific Coast next to Silicon Valley, Santa Cruz, CA, USA 408-507-9694 __________________________________________________ Do You Yahoo!? Yahoo! Sports - live college hoops coverage http://sports.yahoo.com/ ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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: davehe...@mediaone.net 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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
