API MPMS Chapter 12.2

This standard presents the calculation procedures for dynamic measurement tickets (meter tickets), and meter proving of devices with volumetric outputs. This document provides standardized calculation methods for the quantification of liquids and the determination of base prover volumes under defined conditions, regardless of the point of origin or destination or the units of measure required by governmental customs or statute. The criteria contained in this document allow different entities using various computer languages on different computer
hardware (or manual calculations) to arrive at output results within a defined tolerance as specified within this document, using the same input data.
The publication rigorously specifies the equations for computing correction factors, rules for rounding, calculational sequence, and discrimination levels to be employed in the calculations. No deviations from these specifications are permitted since the intent of this document is to serve as a rigorous standard.
This document also covers multiple calculations as required by dynamic online
integrated continuous flow measurement.
This standard presents two methods for data acquisition:
1. Discrete Method (Traditional Method)
2. Continuous Method (Dynamic Method)
In either data acquisition method, the same calculation routines are used. The only difference is intermediate rounding and the time in which the calculation is performed. Rounding or truncating initial and intermediate values in the Continuous Method has been eliminated.