Rich and all I believe rating markings, energy efficiency ratings, EMC and Radio markings should be harmonized worldwide and governments/regulators should be involved to train consumers the meaning these markings. There is no reason why one country requires the ratings to be in traditional Chinese, another in simplified Chinese, another requiring comma instead of decimal hence two ratings, etc. I just checked the label on my new TV and it has so many markings and characters that is making me very dizzy. My old TV label is so much less populated and more readable.
Sent from my iPhone Peter S. Merguerian [email protected] Go Global Compliance Inc. www.goglobalcompliance.com (408) 931-3303 On Jan 27, 2012, at 12:46 PM, "Richard Nute" <[email protected]> wrote: > My nifty Samsung TV is rated 100-240, 50/60 Hz. > > Per the discussion here: > > 100-240 indicates a continuous range; > 50/60 Hz implies two discrete switchable ranges. > > As mentioned in this discussion, 50/60 implies a > range of frequencies between 50 and 60 where the > TV would not operate. Of course, as everyone > recognizes, there is no switch for frequency. And, > the TV would operate at any frequency between 50 > and 60. > > Even among ourselves (product safety professionals), > we do not apply the rating markings consistently. > > There is no justification for expecting the user > to distinguish between a - and a /. The user buys > an appliance locally, and it comes with a cord an > plug for local use. The markings are not read > prior to installation. Neither do the installation > instructions instruct the user to check the ratings > before installation. The manufacturer does this > for the user by shipping a fully configured product > to the retailer. > > Table lamps don't have rating markings. > > What, then, is the value of the ratings markings? > > For that matter, what is the safety function of the > ratings markings? > > Finally, for whom are the rating markings intended? > > > Best regards, > Rich > > > ps: My wife's Pfaff sewing machine has two ratings: > > 120 V, 50/60 Hz certified by UL and CSA. > 220-240 V, 50/60 Hz certified with CE and others. > > The ratings are distinctly separate, but on the > same label. No switch. Its quite clear the unit > operates 120-240 and 50-60. > > - > ---------------------------------------------------------------- > 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://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://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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
