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JJG 98-2019 English PDF

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JJG 98-2019: Mechanical Balance
Status: Valid

JJG 98: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 98-2019English649 Add to Cart 5 days [Need to translate] Mechanical Balance Valid JJG 98-2019
JJG 98-2006EnglishRFQ ASK 5 days [Need to translate] Verification Regulation for Mechanical Balance Obsolete JJG 98-2006
JJG 98-1990EnglishRFQ ASK 9 days [Need to translate] Verification Regulation of Non-automatic Balance Obsolete JJG 98-1990
JJG 98-1972EnglishRFQ ASK 3 days [Need to translate] (Chinese Industry Standard) Obsolete JJG 98-1972

PDF similar to JJG 98-2019


Standard similar to JJG 98-2019

GB/T 36126   JJG 139   GB/T 1885   JJG 99   JJG 105   JJG 098   

Basic data

Standard ID JJG 98-2019 (JJG98-2019)
Description (Translated English) Mechanical Balance
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.060
Word Count Estimation 30,388
Date of Issue 2019
Date of Implementation 2020-03-27
Issuing agency(ies) State Administration for Market Regulation

JJG 98-2019: Mechanical 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.
(Verification Regulation of Mechanical Balance) National Measurement Verification Regulations of the People's Republic of China Mechanical balance 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Verification Regulation of Mechanical Balance Replace JJG 98-2006 Focal point. National Technical Committee for Mass Density Measurement Main drafting unit. Guizhou Metrology and Testing Institute Zhejiang Academy of Metrology Shanghai Tianmei Tianping Instrument Co., Ltd. Participated in the drafting unit. Tianjin Academy of Metrology Supervision and Inspection Science Shaanxi Provincial Institute of Metrology Jilin Institute of Metrology The National Technical Commission for Mass Density Measurement is entrusted to explain this regulation The main drafters of this regulation. Gu Xi (Guizhou Metrology and Testing Institute) Ge Rui (Zhejiang Institute of Metrology) Dong Li (Shanghai Tianmei Balance Instrument Co., Ltd.) Participating drafters. Mo Yihua (Guizhou Metrology and Testing Institute) Huang Aijun (Tianjin Metrology Supervision and Inspection Science Research Institute) Guo Xinyu (Shaanxi Provincial Institute of Metrology) Fuxin (Jilin Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 3.1 Terminology (1) 3.2 Unit of measurement (2) 4 Overview (2) 5 Measurement performance requirements (2) 5.1 Accuracy class (2) 5.2 Balance measurement performance (3) 6 General technical requirements (5) 6.1 Appearance requirements (5) 6.2 Structural requirements (5) 7 Control of measuring instruments (6) 7.1 Verification conditions (6) 7.2 Verification items (7) 7.3 Verification method (8) 7.4 Processing of verification results (16) 7.5 Verification period (16) Appendix A Calibration record format for double-disc balances (17) Appendix B Calibration record format for single-disk balances (18) Appendix C Recording Format of the Error Verification of Hanging Weight Combination (19) Appendix D. Internal page format of the verification certificate (differential scale or digital scale balance) (22) Appendix E. Internal page format of verification certificate (ordinary scale balance) (23) Appendix F. Internal page format of the verification certificate (single-plate balance) (24)

Introduction

The accuracy level and terminology of this regulation are referred to the international recommendations of the International Organization for Legal Metrology (OIML) R76-1 "Non-automatic Weighing Instruments" (Non-automaticWeighingInstruments) Content. This regulation replaces JJG 98-2006.Compared with JJG 98-2006, the main technical changes except for editorial changes as follows. --- Added an introduction; --- Added reference file; --- Added terms and units of measurement; --- Removed working environment conditions; --- Increasing the applicability requirements in the general technical requirements; --- Added the calculation formula of "Damping Reduction Coefficient"; --- Added "Inner Page Format of Certification Certificate (Single Plate Balance)"; --- Change "Verification scale division value" to "Verification division value" and "Verification scale division number" to "Verification Number of divisions"; --- Change "average scale value of left and right plates of empty scale" to "scale scale value of balance of empty scale", "average score of left and right plates of full scale "Degree value" changed to "full scale balance scale value"; --- Deleted content related to type evaluation; --- Removed "When mAj≤ 5mP , Y is ignored; when mAj≥ 5mP Time, its impact should be considered"; --- Change "standard weight correction value K*Bj" to "standard weight correction value mccBj", "repair of hanging weight combination The positive value K*Aj" is changed to "the correction value mccAj of the combination of hanging weights". The previous releases of this regulation are. ---JJG 98-2006; ---JJG 98-1972. Verification Regulation of Mechanical Balance

1 Scope

This regulation applies to the first verification, follow-up verification and in-use inspection of lever-type mechanical balances.

2 Reference documents

This regulation refers to the following documents. JJG 99 weight JJF1001 General Measurement Terms and Definitions JJF1229 Terms and Definitions of Mass Density Measurement Terms GB/T 25107 mechanical balance OIMLR76 Non-automatic Weighting Instruments For dated references, only the dated versions are applicable to this Regulation; for those without dates The latest version (including all amendments) is applicable to this regulation.

3 Terms and units of measurement

3.1 Terminology The terminology used in this procedure is consistent with the terminology of JJF1229. The following terms. 3.1.1 Double pan balance Balance with two weighing pans. 3.1.2 Single pan balance singlepanbalance Mechanical balance with only one weighing pan. 3.1.3 Hanging weight dialweight Installed inside the mechanical balance and act on the fixed lever arm, increase or decrease from the outside with the help of the weight dial system Weights. 3.1.4 Rider A movable weight mounted on the balance beam or on a graduated scale connected to the beam. 3.1.5 chaincode chainweight The weight of the mass value is reproduced in the form of a metal chain. 3.1.6 Differential scale subdivisionscaledivision In electro-optical analysis balances, the indicator scale that indicates and accurately resolves the position through the optical system. 3.1.7 Subdivision reading device The auxiliary reading device of the differential scale is used to improve the resolution of the balance display value. 3.1.8 turningpoint In an ordinary scale balance, the position where the swing direction of the balance pointer changes during weighing.

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