ASME B89.1.13-2001 pdf download.MICROMETERS. Al GENERAL This Appendix is intended to provide gcneiai guidance on good operating procedures involving ,iucrometen, spreifically the outside. inside, and depth microrn eICTS A2 MICROMETER, OUTSIDE A2.1 Zero Setting. Mechanical Micrometer Prior to talung measurements, the zero point of the micrometer must be established Zero selttng is the first step of operation with outside, inside,...