My ***ther 1240 definitely dims my lights when it comes on or comes out of standby, I live in an older house with older wiring. But it has no effect on my desktop computer or other electronic loads, with which it shares a common power strip. How important is it to avoid even a momentary turn-on transient?
on 3/12/03 12:57 AM, Whitehouse, Terence (Terry) at [email protected] wrote: Dan et al, The high temperature "fuser bars" on laser printers melt the plasticized toner onto the paper to create the images. To save power, they are operated in standby and are pulsed on demand after the paper has had the toner image electrostatically transferred to it. When printing, my old - and totally reliable - 4L from ****ett ****ard exhibited the flicker characteristic similar to that which you describe. 10 years ago, this model was advertised on TV as "the one to leap-frog the competition" - and price for performance it certainly did so. My replacement ***ther 1240 has no perceptible adverse affect on the household power distribution. Another instance of regulatory standards improving the product!!!!! Terry Whitehouse -----Original Message----- From: Dan Kwok [mailto:[email protected]] Sent: Tuesday, March 11, 2003 3:48 PM To: Chris Maxwell; [email protected]; [email protected] Subject: Re: Exemption from Flicker Testing I had a laser printer that flashed all the lights (at about 1 Hz) in my home office whenever it was switched on. It drove me nuts. When I contacted the vendor about this issue, I was informed they were not expecting the $400 printer to be used in a home office environment. Imagine that. --------------------------------------------------------------------- Dan Kwok, P.Eng. Principal Engineer Electromagnetic Compatibility Intetron Consulting, Inc. Ph (604) 432-9874 E-mail [email protected] Internet http://www.intetron.com ----- Original Message ----- From: "Chris Maxwell" <[email protected]> To: <[email protected]>; <[email protected]> Sent: Tuesday, March 11, 2003 2:03 PM Subject: RE: Exemption from Flicker Testing Yes....Unless it has a 10F capacitor that needs to be charged upon power up :-) I think that the "examination" is meant to look for such problems. > -----Original Message----- > From: [email protected] [SMTP:[email protected]] > Sent: Friday, March 07, 2003 9:40 AM > To: [email protected] > Subject: Exemption from Flicker Testing > > > Clause 6.1 of EN 61000-3-3 + A1 says "Tests shall not be made on equipment > which is unlikely to produce significant voltage fluctuations or flicker. It > may be necessary to determine, by examination of the circuit diagram and > specifications of the equipment and by a short functional test, whether > significant voltage fluctuations are likely to be produced." > > Am I standing on firm ground assuming that equipment consuming less than 75W > can be exempted from test? > > Richard Woods > Sensormatic Electronics > Tyco International > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc -- Ken Javor EMC Compliance Huntsville, Alabama 256/650-5261
