The US standard is similar but different (i.e. size of measurement aperture). The failure mode reference in EN60825 is "reasonably expected failures". Very fuzzy, we consider failures like mirror stoppages, operator errors etc. reasonable. Matthias R. Heinze TUV Rheinland
---------- From: Peter Tarver[SMTP:[email protected]] Sent: Monday, June 09, 1997 9:21 AM To: 'PSTC - articles' Subject: RE: Class I laser . U.S. vs EN 60825 Bob - The limits are similar, but not identical, (yet). As to the failure mode considerations, IEC 825-1 contains requirements for imposing fault conditions on components and the like that might affect the laser class. This is probably the origin of the safety notice. Please note that fault condition testing is not currently a part of the USFDA requirements. Regards, Peter L. Tarver Nortel [email protected] >---------- >From: Bob Brister[SMTP:[email protected]] >Sent: Monday, June 02, 1997 10:18 AM > > >I came across a safety notice from Cisco indicating that under a certain >failure mode one of their single Mode FDDI cards will exceed EN 60825 limits >for a class I laser device, but still meet U.S. limits. > >I thought the limits were the same. Can anyone explain? > > >Robert Brister > >EHS Senior Associate >Digital Equipment Corporation >(508)493-8141 >FAX:(508)493-8353 >
