Oh Boy Elliott, you’ll get a few answers here, lol.
My 10 cents is that when you are not discharging each time you are adding more and more charge to the isolated control, that eventually will snap over At that point you are discharging quite a significantly higher level of chart than an individual event. I would not call that a realistic “ compliance” test. OTOH, if it’s possible that may happen in the real world with an operator continually adding charge as they use your EUT, you may want to find a way of adding some way to bleed charge over a few seconds. Interesting problem, lets see what others say, Sincerely, Derek LFResearch and SSCLabs.com > On Mar 12, 2020, at 10:53 AM, Elliott Martinson > <elliott.martin...@subzero.com> wrote: > > Hi Everybody, > > We’re having some disagreements regarding the 61000-4-2 standard. In the > section “ungrounded equipment”, it states that ungrounded equipment or > part(s) of equipment shall have the charge removed in between ESD pulses in > order to not over-test. > We have a product that only fails pre-compliance when repeated ESD pulses are > applied to a floating metal knob without removing the charge in between > (eventually there is a second discharge between the knob and the enclosure). > The product as a whole is “grounded equipment”. > Since the issue only happens when the charge isn’t removed in between pulses, > is this a pass or a fail? > > Thanks, > > Elliott Martinson > Controls Engineer > Sub-Zero/Wolf > elliott.martin...@subzero.com <mailto:elliott.martin...@subzero.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 <mailto:emc-p...@ieee.org>> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > <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/ > <http://product-compliance.oc.ieee.org/> can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > <http://www.ieee-pses.org/listrules.html> > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org>> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org>> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org>> > David Heald <dhe...@gmail.com <mailto: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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
