I work for a steel service center and we are currently going through ISO certification. At present, we check tape measures on a weekly basis with a 6" steel rule. I am hearing that this is not acceptable in that the "run out" on a tape measure is greater the further out you go. My question is this... Is there a standard length to check them at? I am being asked to supply a "certified" steel rule at lengths of 60" and 120". I can find the 60" but not a 120". As an after thought, the minimum tolerance that we work with is +0/-1/32. Any help would be greatly appreciated.

Sorry I can't help here. You might consider shooting a message thru Greg Gogates - He's the moderator of a list serve which focuses on calibration issues and related topics. I'm on the list and the feedback is good.

Also see:
http://Elsmar.com/ubb/Forum4/HTML/000083.html
and http://Elsmar.com/ubb/Forum4/HTML/000130.html
and http://elsmar.com/ubb/Forum4/HTML/000170.html

[This message has been edited by Marc Smith (edited 30 March 2000).]