Thanks Rich, Paper looks very useful in any case.
~Doug Douglas E Powell Laporte, Colorado USA [email protected] http://www.linkedin.com/in/dougp01 On Tue, Feb 4, 2020 at 11:46 AM Richard Nute <[email protected]> wrote: > > > > > Hi Mark and Doug: > > > > A specific instrument to measure capacitive discharge is not necessary. > Neither is an expensive 100 megohm probe. > > > > IEC 62368-1 specifies time-constant rather than voltage at a specific > time. Since time-constant is not a function of voltage, it is not > necessary to start the measurement near the peak of the voltage waveform; > any start voltage above zero is okay and will give a usable result. > > > > Time constant will be determined by both the equipment discharge means and > the scope probe input resistance. The scope probe input resistance is > known and can be accounted for in the measurement. > > > > Some years ago I wrote an article on how to make this measurement. See > attached. > > > > I proposed this measurement scheme to TC108, but it was not accepted. > > > > Best regards, > > Rich > > > > > > *From:* Douglas Powell <[email protected]> > *Sent:* Monday, February 3, 2020 7:39 AM > *To:* [email protected] > *Subject:* Re: [PSES] Residual Voltage Tester > > > > Mark, > > > > Not aware of an instrument specific to this test in North America. I > always used an o'scope with storage capability after the fashion of this > article. > https://incompliancemag.com/article/the-capacitive-discharge-test/. A > precautionary note, you must meet the high input impedance requirement of > CTL OD-5014, https://www.iecee.org/documents/refdocs/ > > > > > > Best of luck, Doug > > > > > > Douglas E Powell > > Laporte, Colorado USA > > [email protected] > > http://www.linkedin.com/in/dougp01 > > > > On Mon, Feb 3, 2020 at 8:19 AM Stultz, Mark < > [email protected]> wrote: > > Hello, > > > > Anyone know of a good tester for IEC 60204-1 and 60335-1 residual voltage > that’s available in the US? I’m looking at > http://www.stanmax.nl/index.php/msom/ but not sure about leadtime from NL. > > > > Thanks! > > > > > > > > > > *Mark Stultz* > > 10175 Philipp Parkway > > Senior Mechanical Development Engineer > > Streetsboro, OH 44241 > > CMSE® – Certified Machinery Safety Expert (TÜV NORD) > > 330-342-2402 > > Automated Packaging Systems > > > > > > > > [image: A picture containing vector graphics Description automatically > generated] > > > > > > autobag.com <https://www.autobag.com/> > > SealedAir.com <https://sealedair.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 < > [email protected]> > > 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) <http://www.ieee-pses.org/list.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]> > > > > > -- > > > > Douglas E Powell > > [email protected] > http://www.linkedin.com/in/dougp01 > > - > ---------------------------------------------------------------- > > 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://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) <http://www.ieee-pses.org/list.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]> > -- Douglas E Powell [email protected] http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- 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://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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
