GB/T 29820.2-2024 Active National standards

GB/T 29820.2-2024 Assessment of uncertainty in the calibration and use of flow measurement devices—Part 2:Non-linear calibration relationships

Publish Date: 2024-12-31 Implement Date: 2025-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 29820.2-2024

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Flow and level measurement instruments

ICS Name: The measurement of flow rate in a closed pipeline

Publish Date: 2024-12-31

Implement Date: 2025-07-01

Pages: 36 pages

Scope

This document describes the process of using the least squares criterion to fit a set of non-linear calibration data with quadratic, cubic, or higher-order polynomials, and evaluating the uncertainty associated with the generated calibration curves. Only polynomials with integer powers are considered.
Since conducting this type of curve fitting and uncertainty evaluation typically requires the use of a computer, in most cases, standard programs provided on the computer are used; a reference program is provided in Appendix A.
Examples of the use of these methods can be found in Appendix B.
It is not allowed to extrapolate beyond the data range.