I read in !emc-pstc that Jacob Schanker <j.schan...@worldnet.att.net> wrote (in <003101c14575$a8b4dcc0$2ef1fea9@f0p1o1>) about 'Steel ball for impact tests', on Mon, 24 Sep 2001: > >The mention of traceable calibration for a steel ball makes me wonder >(tongue partially in cheek) about verification of the gravitational constant >involved in the testing. Are adjustments to be made for local gravitational >anomalies, altitude above sea level at the place of measurement, and the >mass of the item tested (gravitational attraction being a function of mass)?
Yes, of course, and a campaign must immediately be launched to write a specification and certify all these guide tubes that people are using. Just think, some of them may have cost less than USD1000. Draft specification Material: PTFE 99.99% pure Inside diameter 50.2000 mm Length: 1.00000 m Straightness: 10^-6 Concentricity: 0.0002% Air release hole diameter: 4.000 mm Air release hole pitch: 45.000 mm Colour: Optional, but uniform and subdued. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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.
