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Shandong Calibration Company Leads the Release of the “Calibration Specification for Force-Value Weights”
The group standard “Calibration Specification for Force-Value Weights” (T/CSMT–YB014–2025), spearheaded by China Certification & Inspection Group Shandong Co., Ltd., has been officially released, filling a domestic gap in calibration specifications for force-value weights, standardizing calibration methods, and ensuring accurate and consistent metrological traceability to the International System of Units.
Release Date:
2026-02-10
Source:
The “Calibration Specification for Force-Value Weights” (T/CSMT-YB014—2025), spearheaded by Shandong Calibration Company, was officially promulgated by the Chinese Society of Metrology and Testing on November 26, 2025, and came into effect on December 26, 2025. **The following is a detailed introduction to this specification:**
I. Background and Significance of the Release
Background: Force standard weights, as critical metrological instruments in the field of force measurement, directly affect the validity of measurement results through the accuracy and reliability of their indicated values. However, until now, China has lacked dedicated national metrological verification procedures or calibration specifications for such instruments, resulting in a gap in standardized methods for verifying force standard weights. Significance of this specification: Its promulgation fills the domestic void in calibration standards for force standard weights, providing scientific guidance for the traceability of force standard weight values across laboratories. This will help enhance the accuracy of measurement results in China’s force measurement sector and promote high-quality development of the metrology industry.
II. Regulatory Content
Scope: This specification sets forth the terms and definitions, metrological characteristics, calibration conditions, calibration items, and calibration methods for force-standard weights, and is applicable to the calibration of force-standard weights whose nominal mass is not corrected for air buoyancy.
Main content:
Terms and Definitions: Defines relevant terms such as force-value weights, nominal mass, and agreed-upon mass.
Metrological characteristics: Specifies the metrological requirements for force-standard weights, including the nominal mass and the correction value for the nominal mass, among others.
Calibration conditions: This section provides a detailed description of the environmental conditions required for calibration (such as temperature, humidity, and vibration) as well as the requirements for measurement equipment (such as standard weights and measuring instruments).
Calibration items and methods: These include preparatory work prior to force-value weight calibration (such as surface cleaning and temperature equilibration), the method for calculating nominal mass, the principles for selecting standard weights, the calibration procedure, and the calculation of results.
Expression of Calibration Results: Describes the information requirements that a calibration certificate shall contain.
Reverification interval: Recommendations for the reverification interval are provided.
Appendix: This section provides reference formats for force-weight calibration records and the inner pages of calibration certificates, methods and examples for evaluating the uncertainty of measurement results for the nominal masses of force weights, reference values of gravitational acceleration for selected cities in China, and approximate methods for calculating gravitational acceleration.
III. Drafting Organization and Principal Drafters
Drafting organizations: Shandong Jianyan Metrology Testing Co., Ltd., Shandong Zhongjian Calibration Technology Co., Ltd., Shandong Hengliang Testing Technology Co., Ltd., Tianjin Huace Testing and Certification Co., Ltd., Changzhou Fuyue Weights Co., Ltd., Penglai Shuilings Weights Factory, Shandong Provincial Metrology Testing Center, and the Chinese Society of Metrology and Testing, among others.
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