The latest: Lightning is hunting for Ipods

http://arstechnica.com/journals/apple.ars/2006/7/6/4551 Actually I think it was the Metallica in the Ipod that caused it. Bob Johnson - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the lis

RE: DC Insulation Resistance Testing

> > What does DCC mean when referring to wire? > > You have to be OLD to cotton on to that (more than once)! What about > DSEC? (;-) Nope, I don't know this one. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/

Re: DC Insulation Resistance Testing

In message <001201c7c3ee$89cc2a40$6a01a8c0@PC323541548743>, dated Wed, 11 Jul 2007, rn...@san.rr.com writes: >Any other reasons why insulation resistance would decrease with time in >use? Well, that's more or less my point. If it starts at 100 Mohms, but after just a year it can be as low as 1

RE: DC Insulation Resistance Testing

> But IR measures the integrity of insulation WITHOUT the > swamping effect > of capacitor current, so in fact it IS very important and should be > checked in production, as it is in periodic field testing. Agreed that the IR test measures the insulation resistance more-or-less independent of t

Re: DC Insulation Resistance Testing

In message <001101c7c3ea$7ff6e900$6a01a8c0@PC323541548743>, dated Wed, 11 Jul 2007, rn...@san.rr.com writes: > What does DCC mean when referring to wire? You have to be OLD to cotton on to that (more than once)! What about DSEC? (;-) -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www

RE: DC Insulation Resistance Testing

> >Does this idea intend that each product off the production line be > >marked or otherwise documented with it's IR value? > > No. In the manual you state a lower limit value based on the '1/3 of > original'. The original value should not vary much between > samples, of > course; If it does, t

RE: DC Insulation Resistance Testing

model railway control signals ?? ok, you probably intended 'double-cotton-covered', but I am without self-control today. I suppose the opposite of Teflon or Rubadue (TM). R/S, Brian > Here's a quiz for you: What does DCC mean when > referring to wire? > > > Best regards, > Rich - This

RE: DC Insulation Resistance Testing

Hi Ron: You ask some good questions. I should use these for my next "Technically Speaking" column in the PSEN. Insulation resistance and dielectric strength are two different parameters of insulation. Insulation resistance is just that: the resistance, in ohms (or teraohms) of the installed

RE: DC Insulation Resistance Testing

BINGO Give the good man a stuffed bunny... IR, at least for my industry sector, is THE test of choice to verify system-level leakages and chemical stability of materials vs. enviromental conditions. Di-electric withstand, for other than Type Tests, is just engineering mind candy. luck, Bria

Re: DC Insulation Resistance Testing

In message , dated Wed, 11 Jul 2007, John Woodgate writes: >I don't have much respect for the 'routine test' requirements; IR is >IMPORTANT and I guess it was only eliminated to save 100 ms test time. I think a few thousand more words are necessary. From the safety point of view, the **immedi

Re: DC Insulation Resistance Testing

In message , dated Wed, 11 Jul 2007, "Tarver, Peter" writes: >Pardon, I was not clear enough. Routine, as in routine test for 100% >of product at the factory. I was using the term in IEC standards for >what is also called a production line test. I was not referring to >in-situ testing af

RE: DC Insulation Resistance Testing

> From: John Woodgate > Sent: Wednesday, July 11, 2007 9:19 AM > > Tarver, Peter" writes: > > > I've not seen IR as a required routine test for most product types. > > It IS in Europe, for 'portable appliances'. Known as 'PAT > testing' - tautological like 'PIN number'. Usually carried > out

Re: DC Insulation Resistance Testing

In message , dated Wed, 11 Jul 2007, "Tarver, Peter" writes: >Does this idea intend that each product off the production line be >marked or otherwise documented with it's IR value? No. In the manual you state a lower limit value based on the '1/3 of original'. The original value should not

RE: DC Insulation Resistance Testing

> From: John Woodgate > Sent: Wednesday, July 11, 2007 1:37 AM > > I think the 'pass' criterion should be that the IR is greater > that one-third of the initial value, indicating that not very > much degradation has occurred, probably due to surface contamination. Does this idea intend that eac

Re: force deflections and clearances

In message <000301c7c3c3$d21b44f0$d600a...@tamuracorp.com>, dated Wed, 11 Jul 2007, Brian O'Connell writes: >While we wait for the 'whenever' period to expire, does anyone know of >a reasonably-priced seminar for HBSE intended for a (somewhat) >experienced compliance person ? Perhaps a good bo

New (issue 2) guide to EMC Directive 2004/108/EC

G'Day! I've just found that there's an issue 2 (May 2007) European Commission Guide to the new EMC Directive 2004/108/EC available at < http://ec.europa.eu/enterprise/electr_equipment/emc/directiv/dir2004_108.htm> …

RE: force deflections and clearances

While on the subject of IEC 62368, I have noted that several customers have recently requested projects where the target standards were both 60950 and 60065. The logic was that this the product "would then become immediately eligible for 62368." And I want the good people of this group to know tha

RE: DC Insulation Resistance Testing

The "insulation resistance test" examines different physical and/or chemical properties than the di-electric withstand, and the di-electric withstand is considered to be a destructive test. I have used insulation resistance data as an effective indicator in long-term reliability studies, which can

Re: force deflections and clearances

In message , dated Tue, 10 Jul 2007, "Tarver, Peter" writes: >60065, while easier on the volumetric real estate budget, requires some >good basic reinforcement applied to the mechanical design in the >relevant areas. The 60065 test simulates a localized point load, e.g. the corner of anoth

Re: DC Insulation Resistance Testing

In message , dated Tue, 10 Jul 2007, Ronald R. Wellman writes: >I was wondering if anyone knows the history behind DC Insulation >Resistance Testing and why it continues to be performed in Europe and >Asia when a Dielectric Withstand test is a better test to indicate >insulation failure. 1.