Are you sure about the IEC 60521 reference? IEC 60521 (1988-03) Class 0.5, 1 and 2 alternating-current watthour meters
Applies only to newly manufactured induction type watt-hour meters of accuracy classes 0.5, 1 and 2, for the measurement of alternating current electrical active energy of a frequency in the range 45 Hz to 65 Hz and to their type tests only. This publication supersedes IEC 60043 (1960), 60170 (1964) and 60280 (1968). ---- Patrick Lawler [email protected] On Mon, 29 Apr 2002 10:55:57 -0400, Ned Devine <[email protected]> wrote: >I can help much, but, for this paragraph, the rationale at the back of the >standard states that "Annex AAA of the Collateral Standard IEC 60601-1-2 >states that the limits and methodology are under consideration by technical >committee 77. This Particular Standard, however, refers for the time being >to IEC 60521 in which 400 A/m is required." > >For the Second Edition of IEC 60601-1-2, Clause 36.202.8.1, the limit is 3 >A/m. > >Ned Devine >Program Manager >Entela, Inc. >3033 Madison Ave. SE >Grand Rapids, MI 49548 >1 616 248 9671 Phone >1 616 574 9752 Fax >[email protected] e-mail > >Entela, Inc. A Certified Woman Owned Business >www.entela.com > >-----Original Message----- >From: [email protected] [mailto:[email protected]] >Sent: Sunday, April 28, 2002 3:40 PM >To: [email protected] >Subject: IEC 60601-2-24 / Magnetic Field > >Hi all, >A colleague was checking the IEC 60601-2-24:98 and found the Magnetic Field >Req't (paragraph 36.202.6) far too high: 400 Ampere-per-meter! I'd like to >check this requirement for its correctness or history with backgrounds for >such a demand. I know that 3A/m, 10A/m and 30A/m are often used, but 400A/m >..... > >Can anybody help? > >Best regards >Amund Westin, Oslo/Norway > >PS: IEC 60601-2-24:98 - "Medical electrical equipment - Part 2-24: >Particular requirements for the safety of infusion pumps and controllers" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
