I agree. The purpose of the HCP and VCP (as I understand it) is to simulate an ESD discharge to an object adjacent to the EUT. So I would think the EUT in this case should be grounded to the ground reference plane and not to the HCP. The HCP will only be connected through the drain wire (w/ the required resistors) to the ground reference plane. Bob R.
--- On Wed, 8/24/11, Derek Walton <[email protected]> wrote: From: Derek Walton <[email protected]> Subject: Re: EN61000-4-2 questions To: [email protected], [email protected] Date: Wednesday, August 24, 2011, 8:24 AM Hi Ian, I would argue that the only purpose of the HCP is for injecting noise into your EUT. I would consider it an error to hook any grounds to this. I await correction :-) Sincerely, Derek Walton, L F Research. -----Original Message----- From: Ian White (UK) <[email protected]> To: IEEE Forum ([email protected]) <[email protected]> Sent: Wed, Aug 24, 2011 4:30 am Subject: EN61000-4-2 questions Forum members, We are testing a product which is made of metal and due to the size of it l have a table top test set up very similar to that shown in Figure 4 of the standard EN61000-4-2:2009. The unit is sitting on insulation 0.5mm thick on the horizontal coupling reference plane. In service this product sits in a steam line and has hardwired earths connected to earth for functional reasons, I have connected these earths to the horizontal coupling plane, is this correct ? The standard does not appear to give any guidance on this matter, but it seems the only logical solution. Thanks for your help. Ian White (Compliance and Reliability) - ---------------------------------------------------------------- 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 <[email protected] <http://us.mc11.m il.yahoo.com/mc/[email protected]> > 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 <[email protected] <http://us.mc11.mail.yahoo.com/mc/[email protected]> > Mike Cantwell <[email protected] < ttp://us.mc11.mail.yahoo.com/mc/[email protected]> > For policy questions, send mail to: Jim Bacher <[email protected] <http //us.mc11.mail.yahoo.com/mc/[email protected]> > David Heald <[email protected] <http //us.mc11.mail.yahoo.com/mc/[email protected]> > - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
