Should be 4.3.11 While my standards tolerance is 3 text lines, my published standards uncertainty is 7 paragraphs for 95%.
Brian -----Original Message----- From: Brian O'Connell Sent: Wednesday, October 19, 2016 9:54 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Uncertainty Measurement Calculations [General Use] Concur, as tolerance is not same stuff as uncertainty. But have seen uncertainty calculations as an additional requirement in some customer specs where MS461 was the referenced standard. Just use the test lab's numbers that are on their ISO17025 registration, which Mr. Javor referenced for 'measurement system integrity check' per 4.3.1; and note that there is a multitude of test methods having a specific ' measurement system integrity check'. Brian From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: Wednesday, October 19, 2016 6:57 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Uncertainty Measurement Calculations [General Use] It couldn't be easier. MIL-STD-461 has no uncertainty requirements whatsoever, and anyone trying to mandate such has no military heritage authority to do so. The only accuracy-type requirement in MIL-STD-461 is the measurement system integrity check, performed right before making each pertinent measurement. Ken Javor Phone: (256) 650-5261 ________________________________________ From: "Price, Andrew (Leonardo, UK)" <andrew.p.pr...@leonardocompany.com> Reply-To: "Price, Andrew (Leonardo, UK)" <andrew.p.pr...@leonardocompany.com> Date: Wed, 19 Oct 2016 06:04:25 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Conversation: Uncertainty Measurement Calculations [General Use] Subject: [PSES] Uncertainty Measurement Calculations [General Use] Hi all Can anyone shed some light on working up the Uncertainty Measurement Calculations based on UKAS Lab34 for MIL-STD-461 CS115 and CS116. I need to show the uncertainty values for these tests as follows: Uncertainty in overall test level = 2.2dB, Uncertainty in time measurement = 1.91%, Uncertainty in Amplitude measurement = 0.82% MIL-STD-461 defines 4.3.1 Measurement tolerances. Unless otherwise stated for a particular measurement, the tolerance shall be as follows: a. Distance: ±5% b. Frequency: ±2% c. Amplitude, measurement receiver: ±2 dB d. Amplitude, measurement system (includes measurement receivers, transducers, cables, and so forth): ±3 dB e. Time (waveforms): ±5% f. Resistors: ±5% g. Capacitors: ±20% Also what equipment do I include, ie. DSO, Current Probes, Calibration Jig, Transient Generator, etc. and what do I exclude???? I hope there are some group members that have already done this process and can help. Regards Andy David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
