Discussion on JJF 1139-2026 Principles and Methods for Determining the Verification Interval of Measuring Instruments

The issuance and implementation of JJF 1139-2026 Principles and Methods for Determining the Verification Interval of Measuring Instruments marks an important update to China’s system of metrological technical specifications. While reasonably inheriting the content of the previous edition, this revised specification expands the methods for establishing verification intervals, clarifies the fundamental principle centered on measurement reliability, and sets up a systematic framework for method selection.

To put this specification into practice, metrology professionals need to thoroughly comprehend its principles and methodologies. They shall scientifically and rationally determine verification intervals according to the actual conditions of different types of measuring instruments. Only in this way can the fundamental objective — “ensuring accurate and reliable values of measuring instruments and mitigating the risks of out-of-tolerance use” — be truly achieved, thereby providing solid metrological technical support for the high-quality development of China’s economy and society.