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JJF 1847-2020 English PDF

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JJF 1847-2020: (Calibration specification for electronic balance)
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Basic data

Standard ID JJF 1847-2020 (JJF1847-2020)
Description (Translated English) (Calibration specification for electronic balance)
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Word Count Estimation 28,240
Date of Issue 2020-07-02
Date of Implementation 2021-01-02
Regulation (derived from) Announcement No. 29 (2020) of the State Administration for Market Regulation
Issuing agency(ies) State Administration for Market Regulation

JJF 1847-2020: (Calibration specification for electronic balance)

---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.
(Calibration specification for electronic balance) National Metrology Technical Specifications of the People's Republic of China Calibration specification for electronic balance 2020-07-02 released 2021-01-07 implementation Issued by the State Administration for Market Regulation Calibration specification for electronic balance Focal point. National Technical Committee of Quality Density Measurement Main drafting unit. China Institute of Metrology Shanghai Institute of Metrology and Testing Technology METTLER TOLEDO Instruments (Shanghai) Co., Ltd. Participating in the drafting. METTLER TOLEDO International Trade (Shanghai) Co., Ltd. Yunnan Institute of Metrology and Testing Technology Xinjiang Uygur Autonomous Region Metrology and Testing Institute This specification entrusts the National Quality Density Measurement Technical Committee to be responsible for the interpretation Main drafter. Hu Manhong (China Institute of Metrology) Su Yi (Shanghai Institute of Metrology and Testing Technology) Ge Tianping (Mettler-Toledo Instruments (Shanghai) Co., Ltd.) Participating drafters. Li Tongyang (Mettler-Toledo International Trading (Shanghai) Co., Ltd.) Huang Jian (Yunnan Institute of Metrology and Testing Technology) Guo Rui (Xinjiang Uygur Autonomous Region Metrology and Testing Research Institute)

table of Contents

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Term (1) 3.2 Symbol table (1) 3.3 Unit of measurement (2) 4 Overview (2) 4.1 Principle (2) 4.2 Purpose (3) 5 Metering characteristics (3) 6 Calibration conditions (3) 6.1 Standard weights (3) 6.2 Alternative loads (4) 6.3 Other related measuring instruments for measurement (4) 6.4 Calibration environmental conditions (4) 6.5 Indication (4) 7 Calibration items and calibration methods (4) 7.1 Calibration items (4) 7.2 Calibration method (4) 8 Calibration results (6) 8.1 Indication error measurement results (6) 8.2 Repeatability measurement results (6) 8.3 Load measurement results at different positions (7) 8.4 Calibration certificate (7) 9 Recheck interval (7) Appendix A Evaluation of Uncertainty of Measurement Results of Electronic Balance (8) Appendix B Alternative Load (11) Appendix C Example of Uncertainty Evaluation of Measurement Results of Electronic Balance (16) Appendix D Electronic balance calibration record format (example) (21) Appendix E Inside page of electronic balance calibration certificate (example) (22)

Introduction

This specification is based on JJF 1071 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1059.1 "Measuring Uncertainty Evaluation and Representation, refer to the International Recommendation R76-1 of the International Organization for Legal Metrology, Non-Automatic Weighing Instruments Part 1.Measurement And technical requirements test, International Recommendation R76-2, Non-Automatic Weighing Apparatus Part 2.Test Report Format, The European Union Calibration Guide No. 18 "Guide to Calibration of Non-Automatic Weighing Instruments", etc. JJG1036-2008 "Electronic Balance" is used for the verification of electronic balances and gives the judgment of whether the electronic balance is qualified or not. It belongs to the legal measurement requirements; this specification is used for the measurement requirements of other categories of electronic balances. This specification provides the calibration conditions, calibration items, calibration methods and uncertainty evaluation methods and examples of electronic balances. This specification is released for the first time. Calibration specification for electronic balance

1 Scope

This specification applies to the calibration of various electronic balances.

2 Reference documents

This specification refers to the following documents. JJG99 weight JJG1036 Electronic Balance JJF 1001 General measurement terms and definitions JJF 1059.1 Evaluation and expression of measurement uncertainty JJF 1181 Weighing instrument measurement terms and definitions JJF 1229 Terms and Definitions of Mass Density Measurement GB/T 23111 Non-automatic weighing instrument GB/T 27418 Evaluation and Expression of Uncertainty in Measurement OIMLR76-1 Non-automatic weighing instrument Part 1.Measurement and technical requirements test OIMLR76-2 Non-automatic weighing instrument Part 2.Test report format OIMLR111-1 E1, E2, F1, F2, M1-2, M2, M2-3 and M3 grade weights Part 1.Metrological technical requirements OIMLR111-2 E1, E2, F1, F2, M1-2, M2, M2-3 and M3 grade weights Part 2.Measurement report form EU Calibration Guide No. 18 Non-automatic Weighing Instrument Calibration Guide For dated reference documents, only the dated version applies to this specification, and for undated reference documents, The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

3.1 Term Related terms refer to JJF 1001 "General Measurement Terms and Definitions", JJF 1181 "Weighing Apparatus Measurement Terms and Definitions", JJF 1229 "Terms and Definitions of Mass Density Measurement". 3.2 Symbol table The symbols listed in Table 1 apply to this specification. Table 2 shows the symbol subscript description.

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