What method should be used or how does your place of employment do it?
I just use gauge blocks, which is a pain to do a 24"+ height gauge.
Stampede, Sounds like you should look into a "Webber Reference Bar". This is/was a Starrett product made of a stack of .50000" gauge blocks in a housing. It can be stood up in a vertical position or layed down for horizontal applications.
I (actually the company I was employed by) had a 48" Webber bar and used it to calibrate height gauges vertically, co-ordinate measuring machine in X,Y & Z and to assure the software abiliy to accurately interpolate angular distances.
Also, the Webber bar can be used to calibrate the measuring system(s) on machine tools.
I just Googled "Webber Reference Bar" and it's still in their gauge block catalog section.
Good but pricey investment.
Last edited by RICHARD ZASTROW; 05-30-2008 at 10:57 AM. Reason: spelling and new info