Grace, On Fri, 23 Aug 2013 09:03:35 -0400, Grace Lin <graceli...@gmail.com> wrote:
> Could you please share your experience and/or knowledge for the ground > plane grounding in the immunity lab? > > We plan to layout a L shape ground plane in the 24' x 18' area for ESD, > etc. tests. The corner of the L shape is right next to a 10" wide building > collar. Is a ground strap tied to the collar good enough? > > Do we need (copper) ground rods? If yes, what is the minimum length > (deep)? What is the recommended space between rods? I think you can simply connect the ground plane to the grounding system already available in the building. > How to choose metal sheet material (galvanized steel, stainless steel, > etc.)? If mechanical strength is also required, thick sheet of galvanized steel or stainless steel may be used. Galvanized steel is cheap, but, personally, I don't like this kind of plated material as we may need to take care so that those thin plating will not be damaged. Recently, we replaced galvanized steel sheets in our old shielded rooms with austenite stainless steel sheets. If mechanical strength is not important, thin sheet of aluminum or copper may work well. In the case of IEC 61000-4-2, minimum thickness of the ground plane is 0.25 mm for copper and aluminum. Copper is electrically good but its surface may not looks so good, and can be heavy and expensive than aluminum. > When weldering the metal sheet, is there anything that need to be cautious? It can become troublesome to weld thick metal sheets placed on the floor, and some material may not suitable for welding. I rather like not to weld and bond them with other means. Regards, Tom -- Tomonori Sato <vef00...@nifty.ne.jp> URL: http://homepage3.nifty.com/tsato/ - ---------------------------------------------------------------- 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://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 <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>
