Mark,

The ANSI spec (in Z136.2) provides specific info
for OFCS (Optical Fiber Communications Systems).
This specific information relates to, among other
things, installation location/product accessibility
and personnel exposure/training and marking.
ANSI developed 'Service Group'(SG) classifications,
with the previously mentioned items lumped-in
with the laser Class. For the most
part the SG classification tracks the laser
Class - Class I = SG1 . . Class 3b = SG3b.

Are the installation/service personnel also
the end-user/operator? Is there a possibility
for the end-user, at any time, access the 3b without
much difficulty? If yes, the manual
would indeed be an additional place for a
statement relating to 3b.. ANSI specifies that in
SG3b areas (even if it's inside the product itself)
must be marked with a DANGER statement
see the spec for details). 

Also worth noting is that those who will be exposed
to Class IIIb - installation or service personnel
(which puts the product in the SG3b category)
as you noted have to be trained.
"Only authorized trained personnel shall be permitted
to install or perform service on SG3a, SG3b, or SG4
OFCS."

In my opinion, whether or not the installers/service/end-user
is trained or not (sometimes the trained are worse because
they tend to be over-confident and throw caution to the wind)
it's worth marking the areas on/in the product as well as 
putting references in the manual.


John Juhasz
Fiber Options
Bohemia, NY

-----Original Message-----
From: Mark Schmidt [mailto:mschm...@xrite.com]
Sent: Wednesday, March 06, 2002 8:09 AM
To: Doug Mckean; emc-p...@majordomo.ieee.org
Subject: RE: Laser Safety



Hi Doug,

During normal use the operator could be exposed to Class I. Service
personnel and installation would require potential exposure to Class
IIIb. Should the operators manual make reference to this. Also, wouldn't
you have to warn the operator and service personnel with text in the
manual and warning signs in the IIIb compartment of the system ?

Thank you,

Mark Schmidt
Regulatory Compliance 
X-Rite Incorporated 
USA
(616) 257 2469
mschm...@xrite.com


 -----Original Message-----
From:   Doug Mckean [mailto:dmck...@corp.auspex.com] 
Sent:   Tuesday, March 05, 2002 5:17 PM
To:     emc-p...@majordomo.ieee.org
Subject:        Re: Laser Safety


Do the acid test type question ... 

During normal use, what are you exposing the end user to? 

For instance, with a laser pointer using a Class IIIb 
laser that emits unprotected from the pointer, the 
pointer is Class IIIb. 

If instead, you are using a Class IIIb laser for fiber optic 
communication and the entire beam is contained within 
the fiber, no lasing is emitted from the product during 
normal operation and/or service or maintainance, then 
you *could* declare the telco product as Class I. 

- Doug McKean 



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