This document will provide the reader with a basic overview of transfer proving techniques and
procedures with respect to rotary and diaphragm gas meters. It defines what a transfer prover
is, the need for transfer proving meters for accurate measurement uncertainty verification, the
theory of transfer proving, and recommended operational procedures. This paper also explores
some best practices for companies that do meter proving in field installations. Although other
methods of meter testing will be briefly discussed here, the main focus of this paper and
presentation is testing gas meters in the field using a Transfer Prover