|Re: What do all the symbols mean?|
Message #8 Posted by Ellis Easley on 11 June 2002, 6:45 a.m.,
in response to message #1 by Paul Brogger
I did a little more prowling on the NIST website. The following is from an NIST document which is a guide to the EU EMC directive which is one of the components of the CE marking program:
II. Essential Requirements
Following are the essential requirements of the EMC Directive, as taken directly from Article 4 of the Directive:
“The apparatus…shall be so constructed that:
(a) the electromagnetic disturbance it generates does not exceed a level allowing radio and telecommunications equipment and other apparatus to operate as intended;
(b) the apparatus has an adequate level of intrinsic immunity to electromagnetic disturbance to enable it to operate as intended.”
This is basically what the FCC requirements are about, you see almost this same thing printed in manuals for, and on equipment that meets FCC Class B.
There is also a "low voltage directive" which I thought might cover safety aspects of calculators, but it covers equipment operating from 50VAC or more, 75VDC or more.