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JJF 2030-2023 English PDF

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JJF 2030-2023: Calibration Specification for Multiple Points Weighing CM Machines
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Basic data

Standard ID JJF 2030-2023 (JJF2030-2023)
Description (Translated English) Calibration Specification for Multiple Points Weighing CM Machines
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 22,250
Date of Issue 2023-03-15
Date of Implementation 2023-09-15
Issuing agency(ies) State Administration for Market Regulation

JJF 2030-2023: Calibration Specification for Multiple Points Weighing CM Machines

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Metrology Technical Specifications of the People's Republic of China JJF 2030-2023 Calibration specification for multi-point weighing method centroid measuring instrument Released on 2023-03-15 2023-09-15 Implementation Released by the State Administration for Market Regulation Calibration specification for multi-point weighing method centroid measuring instrument Points Weighing CM Machines Responsible unit: National Mass Density Measurement Technical Committee Main drafting unit: Beijing Institute of Aerospace Metrology and Testing Technology Jiangsu Institute of Metrology Participating in the drafting unit: China Institute of Metrology Zhejiang Institute of Metrology Yunnan Institute of Metrology and Testing Technology Beijing Institute of Metrology and Testing Sciences This specification entrusts the National Mass Density Measurement Technical Committee to be responsible for interpretation The main drafters of this specification: Wang Xiaosan (Beijing Institute of Aerospace Metrology and Testing Technology) Liu Wei (Jiangsu Institute of Metrology) Participating drafters: Sun Fengju (Beijing Institute of Aerospace Metrology and Testing Technology) Zhong Ruilin (National Institute of Metrology) Ge Rui (Zhejiang Institute of Metrology) Huang Jian (Yunnan Institute of Metrology and Testing Technology) Chen Xue (Beijing Institute of Metrology and Testing Sciences)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 3:1 Terminology(1) 3:2 Units of measurement(1) 4 Overview(1) 5 Metrological characteristics(2) 5:1 Weighing indication error (2) 5:2 Indication error of center of mass (2) 6 Calibration conditions(2) 6:1 Environmental conditions (2) 6:2 Calibration standards and other equipment(2) 6:2:1 Weights(2) 6:2:2 Centroid criteria (3) 6:2:3 Other related measuring instruments (3) 7 Calibration Items and Calibration Methods(3) 7:1 Calibration items(3) 7:2 Calibration method(3) 7:2:1 Calibration range(3) 7:2:2 Weighing indication error (3) 7:2:3 Repeatability of weighing indication (3) 7:2:4 Repeatability measurement data processing of weighing indication (4) 7:2:5 Indication error of center of mass (4) 7:2:6 Calibration data processing of centroid indication error (4) 7:2:7 Centroid repeatability(5) 7:2:8 Repeatability measurement data processing (5) 8 Calibration result expression(5) 9 Recalibration interval(6) Appendix A Calibration Record Format of Multipoint Gravimetric Centroid Measuring Instrument (7) Appendix B Format of the inner page of the calibration certificate of the multi-point weighing method centroid measuring instrument (9) Appendix C Example of Uncertainty Assessment of Calibration Results of Multipoint Gravimetric Centroid Measuring Instrument (10)

Introduction

JJF 1071 "Rules for Compilation of National Metrology and Calibration Standards", JJF 1001 "General Metrology Terms and Definitions", JJF 1059:1 "Assessment and Expression of Measurement Uncertainty" constitutes a series of fundamentals supporting the preparation of this specification: specification: This specification is published for the first time: Calibration specification for multi-point weighing method centroid measuring instrument

1 Scope

This specification applies to the calibration of multi-point gravimetric centroid measuring instruments:

2 References

This specification references the following documents: JJG99 Weights JJG539 Digital indicating scale JJG1036 electronic balance For dated references, only the dated version applies to this specification; for undated references document, its latest version (including all amendments) applies to this specification:

3 Terminology and units of measurement

3:1 Terminology 3:1:1 Center of mass (CM) The inherent characteristics of the particle system are only related to the mass size of each particle and the relative position of the distribution, and are used to characterize the particle The average position of the mass distribution of the system: referred to as the centroid: 3:1:2 center of mass standard standardcenterofmass In the coordinate system defined by itself, the parameters of the center of mass are known and have a certain mass, which is used to calibrate the center of mass measuring instrument: measuring tool: 3:2 Units of measurement Units used: milligram (mg), gram (g), kilogram (kg) and ton (t), millimeter (mm), centimeter (cm), meter (m):

4 Overview

The multi-point weighing method centroid measuring instrument (hereinafter referred to as the centroid measuring instrument) uses three or more non-collinear scales A measuring instrument with a heavy sensor as the main body is mainly used to measure the mass and center of mass of the measured object on the defined plane of the measuring instrument: Projection in the surface coordinate system: It is mainly composed of load cells, measuring platforms, coordinate systems and weighing display instruments: become: Figure 1 is a schematic diagram of a centroid measuring instrument: The common center of mass measuring instrument generally includes a circle described by radius or diameter, and a circle described by length and width: For several situations such as rectangle and straight line described by distance, see Fig: 2, Fig: 3 and Fig: 4: The measurement range of other cases can be Refer to Figure 2, Figure 3 or Figure 4 to select:

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