Interesting. During an audit of the facilities of a former employer, the auditor specifically requested that we didn't use the Simpson 228 for EN60950 because of the roll-off of the analog movement above 100Hz. The suggested fix was to build the network as described in the standard, with a high frequency true RMS digital meter.
Frank F. Goto ------------- Original Text From: "POWELL, DOUG" <[email protected]>, on 3/17/99 12:58 PM: Peter, We use a fixture described in the EN 60950, IEC 61010 or EN50178 standards along with an analog meter movement, as described in the standard. The reason for the analog meter, according to the inspector is that many of the digital meters have an aliasing problem at low frequencies. However in the last few years he/they have been accepting the readings of any digital meter with "true RMS" capability, owing to the fact that many of the commercial systems are also not digital. So far this approach has worked just fine for the LGA Nurnberg and CSA. ================================== Doug Powell, Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, Colorado USA [email protected] www.advanced-energy.com ================================== -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Thursday, March 11, 1999 3:28 PM To: [email protected] Subject: Leakage Current Measurements Dear All Safety Engineers/Technicians, I would like to make a survey of what test equipment (multimeter, scope, etc.) you or your friendly test house use to measure the voltage during the leakage current measurements in UL1950/EN 60 950. WE USE: OUR THIRD PARTY TEST HOUSE USES: PETER S. MERGUERIAN MANAGING DIRECTOR PRODUCT TESTING DIVISION I.T.L. (PRODUCT TESTING) LTD. HACHAROSHET 26, P.O.B. 211 OR YEHUDA 60251, ISRAEL TEL: 972-3-5339022 FAX: 972-3-5339019 E-MAIL: [email protected] Visit our Website: http://www.itl.co.il --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
