ASME PTC 19.1, "Test Uncertainty," establishes a definitive engineering framework for quantifying experimental data quality by defining the statistical limits of measurement errors. The standard provides a rigorous five-step procedure—covering systematic and random uncertainties—to evaluate test data and ensure compliance in high-stakes performance guarantees. The official 2018 revision (R2024) is available through the ASME Standards Store. PTC 19.1 - Test Uncertainty - ASME
This document provides the definitive methodology for calculating and reporting uncertainty in performance tests (e.g., turbine heat rate, pump efficiency, fan flow). It replaces earlier ANSI/ASME standards and aligns with ISO/IEC Guide 98-3 (GUM), but with engineering-specific simplifications. asme ptc 191 pdf
Formula from PDF: [ b_r = \sqrt\sum_i=1^N \theta_i^2 b_i^2 ] ASME PTC 19
We have seen third-party audits fail because engineers downloaded a corrupted or outdated PDF. The most frequent errors include: PTC 19