Ralph, if all it takes is a resistor, I wonder why it wasn't done.... 99% of the population are stuck with a crap product.... The idea with CE was that this shouldn't happen!
Derek. Ralph Cameron wrote: > Derek: > > You want to locate one of those lights next to a transmitter that is used > intermittently - the light sequences through LO-Medium-high then turns off > only to come back on again when the transmitter is keyed. > > The AC switching device lacks immunity to RF but it may be easily cured with > the addition of a single resistor. > > Ralph Cameron > > EMC Consultant and Suppression of Consumer Electronic Equipment. > (After sale) > > ----- Original Message ----- > From: "Derek Walton" <l...@rols1.net> > To: <carlos.perk...@eu.effem.com> > Cc: "Jim Hulbert" <hulbe...@pb.com>; <emc-p...@ieee.org> > Sent: Thursday, January 13, 2000 8:57 AM > Subject: Re: Surge Test Performance Criterion > > > > > Sorry Carlos, > > > > I can't go along with this one. If I'm using my PC here in the USA midwest > and a > > storm comes along I don't want my PC shutting itself off every few > minutes.... Only > > been hit directly with two lightning strikes this last 2 years, but during > a storm > > you can continuously heat squeaking as the modem is hit, I know the power > is seeing > > voltage surges too. I'll have to put a Dranitz on the power just to see > what kinds > > of voltage surges arrive.... The same applies to surges generated by > motors etc. If > > every time a motor switches on and my equipment does something, well that > would have > > to go back to the store. > > > > By the way, I don't expect to find in the small print all sorts of get out > clauses > > once I buy something.... > > > > A controlled shut down is there to prevent loss of life, destruction of > the device, > > or something as equally bad..... > > > > By the way, I was back home ( Manchester, England ) last October and > bought my Mum a > > light that turns on when you touch any metal part of it, it was CE marked. > I have a > > similar light here in the USA, mine's not CE marked. BOTH turn on/off when > there are > > voltage transients on the power line. Now you can wrangle all you want, > but being > > woken up in the middle of the night because the light turned on when the > dishwasher > > began it's Saver Seven ( low cost overnight electricity ) cycle, is not > acceptable > > performance! If then manufacturer calls this acceptable performance, then > perhaps I > > should call him/her in the middle of the night each time to confirm that > > opinion...;-) > > > > What products do you make again;-))) > > > > Derek. > > > > > > During surge > > > > carlos.perk...@eu.effem.com wrote: > > > > > Jim, > > > > > > I agree with you, on the basis that in this case, a complete shut-down > is a > > > designed-in function of the product, and the standard says "No > degradation of > > > performance or loss of function is allowed below a performance level > specified > > > by the manfucturer". You, as the manufacturer, are specifying this > 'loss of > > > function'. > > > > > > In my mind, all you have to do is make the end user aware that a > shut-down will > > > occur when a surge is detected, and you should be OK. > > > > > > Cheers, > > > > > > Carlos. > > > > > > Please respond to "Jim Hulbert" <hulbe...@pb.com> > > > > > > To: emc-p...@ieee.org > > > cc: (bcc: Carlos A. Perkins/WIN/Effem) > > > From: "Jim Hulbert" <hulbe...@pb.com> on 12/01/2000 20:08 > > > > > > Subject: Surge Test Performance Criterion > > > > > > A product has a switched mode power supply with a current sensing > circuit that > > > causes the supply to shut down when a surge pulse is applied to the AC > mains in > > > accordance with EN61000-4-5/IEC1000-4-5. After about 10 minutes, the > supply can > > > be turned back on and normal operation of the product can be resumed by > the > > > operator. Does this product conform to criterion B of the EN 50082-1 > or EN > > > 55024 standards? I believe it does because the sensing circuit is > specifically > > > designed to protect the product against this kind of voltage/current > surge and > > > the product operation is fully recoverable by the operator afterward. > However, > > > I would like to hear how others who do this testing would interpret > this. > > > > > > Jim Hulbert > > > Senior Engineer - EMC > > > Pitney Bowes > > > > > > --------- > > > This message is coming from the emc-pstc discussion list. > > > To cancel your subscription, send mail to majord...@ieee.org > > > with the single line: "unsubscribe emc-pstc" (without the > > > quotes). For help, send mail to ed.pr...@cubic.com, > > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > > roger.volgst...@compaq.com (the list administrators). > > > > > > --------- > > > This message is coming from the emc-pstc discussion list. > > > To cancel your subscription, send mail to majord...@ieee.org > > > with the single line: "unsubscribe emc-pstc" (without the > > > quotes). For help, send mail to ed.pr...@cubic.com, > > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > > roger.volgst...@compaq.com (the list administrators). > > > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to majord...@ieee.org > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to ed.pr...@cubic.com, > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > roger.volgst...@compaq.com (the list administrators). > > > > > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
