The RCIC page has as part of the "File and Software Exchange" section, an EMI test uncertainty estimate excel spreadsheet from Mr. Dan Hoolihan and posted by Tom Bao. It's based on NIS 81.
http://www.rcic.com/files/download/NIS81R1.XLS Regards, Bandele Jetstream Communications, Inc. [email protected] -----Original Message----- From: Graham Rae Dulmage [mailto:[email protected]] Sent: Saturday, April 29, 2000 1:23 PM To: Ned Devine Cc: IEEE EMC/Product Safety (E-mail) Subject: Re: Measurement Uncertainty for product safety tests Ned, To my knowledge it is a calculation based on the accuracy(calibration) of the equipment used in the carrying out of a test. You must know what the stated tolerance of each device according to its manual and equipment records. You then for example would take the test equipment plus account for any probes, cables etc. and come up with a measurement uncertainty statement or table for that particular test set up and that particular intsrument. At the Post Compliance 97 conference that Austel put on in Melbourne Australia in 1997 there was a paper presented on this as well as examples of why it can become an issue. NSCL has a number of excellent papers on this issue as well. I trust that this helps you out. G. Rae Dulmage President TelApprove Services Corporation (613) 257 3015 Ned Devine wrote: > Hi, > > One of the accreditations our lab has, is from the American Association for > Laboratory Accreditation (A2LA). A2LA has recently mandated that we > determine the measurement uncertainty for all of the tests we do. I have > been assigned the task of determining the measurement uncertainty for the > "normal" product safety tests. > > I have talked to a number of people, but all I get are different answers. > Some say to just pick an uncertainty based on your judgment. Others say it > is a mathematical derived number based on the accuracy of the equipment > used. Still others say it is a combination of the first two. > > Has any one done this or knows how to do it? > > Thanks > > Ned Devine > Entela, Inc. > Program Manager III > Phone 616 248 9671 > Fax 616 574 9752 > e-mail [email protected] > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
