Hi Folks A few further points that I thought of after sending the first message:
g) Hipotting a piece of repaired equipment does not automatically prove that it is safe (in fact it can be internally awful but still pass the hipot test!). h) It should also involve a comprehensive earth continuity check on Class I equipment - in fact I think that is more important than the high voltage check because it will (should!) deal with many faults which could occur due to safety-related faults in hazardous circuits. i) Most people do not understand what hipotting is intended to do anyway, and so do not afford it the respect and importance that it should be given to be performed effectively and safely. John Allen Thales Defence Bracknell, UK. -----Original Message----- From: Anderson Cheng (TPE) [mailto:[email protected]] Sent: 06 February 2002 02:59 To: '[email protected]'; [email protected] Subject: RE: Compliance After Repairs in the Field If products required to have 100% production-line tests (such as Hi-pot and Ground Continuity tests), then I required that tests should be made in the field after repairs. I think it at least benefits checking out the minimum safety constructions are still functioning well. Regards, Anderson Cheng High Tech Computer Corp. -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Wednesday, February 06, 2002 7:50 AM To: [email protected] Subject: Compliance After Repairs in the Field Greetings, We are a manufacturer of Laboratory Equipment. We evaluate our products to UL 3101-1, CSA 1010.0 and EN 61010. When we repair a product in the field, which may include replacing power supplies, line filters, etc., what obligations do we have to verify continuing compliance with the safety specifications we originally evaluated our products against? Do we need to perform applicable safety testing following these repairs? Traditionally, NRTL's are not concerned with the product once it leaves the factory. They do not require follow-up testing to be performed after repairs are made in the field. Since we self-certify to the LVD, should we take a different approach to repairs in the field compared to the approach NRTL's take? Does your company have a specific process that is followed when repairs are made in the field to verify continuing compliance? If so, what is that process? All responses are appreciated. Regards Joe Martin EMC/Product Safety Engineer Applied Biosystems [email protected] ------------------------------------------- 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: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- 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: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- 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: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server.
