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JJG 781-2019 English PDF

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JJG 781-2019: Digital Indicating Rail-Weighbridges
Status: Valid

JJG 781: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 781-2019English509 Add to Cart 5 days [Need to translate] Digital Indicating Rail-Weighbridges Valid JJG 781-2019
JJG 781-2002English599 Add to Cart 3 days [Need to translate] Verification Regulation of Digital Indication Rail-Weighbridges Obsolete JJG 781-2002
JJG 781-1992English559 Add to Cart 4 days [Need to translate] Verification Regutation of Static Etectronic Rait-weighbridges Obsolete JJG 781-1992

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Basic data

Standard ID JJG 781-2019 (JJG781-2019)
Description (Translated English) Digital Indicating Rail-Weighbridges
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.100
Word Count Estimation 22,227
Date of Issue 2019
Date of Implementation 2020-03-31
Issuing agency(ies) State Administration for Market Regulation

JJG 781-2019: Digital Indicating Rail-Weighbridges

---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.
Digital Indicating Rail-Weighbridges National Measurement Verification Regulations of the People's Republic of China Digital indicator railroad scale Published on December 31,.2019 2020-03-31 Implementation Issued by the State Administration of Market Supervision and Administration Digital indicator railroad scale Verification regulations Replace JJG 781-2002 Focal point. National Railway Special Measuring Instruments Metrology Technical Committee Railway Special Mechanics Sub-Technical Committee Main drafting unit. National Railway Scale Weighing Station Institute of Standards and Metrology, China Railway Research Institute Group Co., Ltd. Shenyang Substation of National Railway Scale Weighing Station Participated in the drafting unit. Chengdu Substation of National Railway Scale Weighing Station This regulation entrusts the National Railway Special Measuring Instruments Metrology Technical Committee Railway Special Mechanics Technology The Technical Committee is responsible for interpretation The main drafters of this regulation. An Aimin (National Railway Scale Weighing Station) Qian Yuelei (National Railway Scale Weighing Station) Zhou Yonggui (Institute of Standards and Metrology, China Railway Research Institute Group Co., Ltd.) Li Yang (Institute of Standards and Metrology, China Railway Research Institute Group Co., Ltd.) Jing Yubao (Shenyang Substation of National Railway Scale Weighing Station) Participating drafters. Wang Ping (National Railway Scale Weighing Station) Liu Ming (Chengdu Branch of National Railway Scale Weighing Station)

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 Division of accuracy levels (2) 5.2 Verification scale value (2) 5.3 Weighing range (3) 5.4 Zero-setting accuracy (3) 5.5 Partial load (3) 5.6 Weighing (3) 5.7 Identification threshold (3) 5.8 Repeatability (3) 6 General technical requirements (3) 6.1 Safety of measurement (3) 6.2 Installation technical requirements (3) 6.3 Technical status (3) 6.4 Extended display device (3) 6.5 Multi-indicating device (4) 6.6 Measurement legal signs and measurement instrument marks (4) 6.7 Selection (or switching) between carriers (4) 7 Control of measuring instruments (4) 7.1 Verification conditions (5) 7.2 Verification items (5) 7.3 Verification method (6) 7.4 Processing of verification results (9) 7.5 Verification period (9) Appendix A Control Scales and Reference Vehicles (10) Appendix B Verification Record of Digital Indicated Rail Scale (Recommended) (12) Appendix C Establish Reference Vehicle Record (Recommended) (14) Appendix D. Internal page format of certification certificate (recommended) (15) Appendix E. Format of the inner pages of the notice of verification results (recommended) (16)

Introduction

This regulation is a revision of JJG 781-2002 "Digital Indicating Rail Scale". This regulation was drafted in accordance with the rules given in JJF1002-2010 "Rules for the Compilation of National Metrology Verification Regulations". Measurement performance requirements refer to OIMLR76-1..2006 "Non-Automatic Weighing Apparatus Part 1.Measurement and Technical Requirements Test" (Non-automaticweighinginstrumentsPart 1.Metrologicalandtechnicalrequire- ment-Test). Compared with JJG 781-2002, except for editorial changes, the main changes are as follows. --- Added the terminology of multi-carrier digital indication railroad scales and dump truck railroad scales and their verification methods --- Modified standard measuring instruments for verification; --- The eccentric load verification project was changed from the original load of about 24t to 38t ~ 40t; --- Modify the discriminating power to the discriminating threshold; --- Increased the requirements and verification methods of the selection (or switching) device between different carriers; --- Increase the internal page format of the verification certificate/verification result notice. The previous releases of this regulation are. --- JJG 781-2002; --- JJG 781-1992, JJG 460-1986. Verification Regulations for Digital Indicated Railway Scales

1 Scope

This regulation is applicable to the first verification and subsequent verification of the digital indication railroad scale with medium accuracy level and ordinary accuracy level And check in use. The digital indicating device combining electromechanical and digital indicating rail scale shall be verified according to this regulation.

2 Reference documents

This regulation refers to the following documents. JJG 99-2006 weight JJG 567 track scale check truck JJF1001 General Measurement Terms and Definitions JJF1181 Terms and Definitions of Weighing Instruments GB/T 2887-2011 General specification for computer field GB/T 15561 static electronic railway scale OIMLR76-1..2006 Non-automatic weighing instruments Part 1.Measurement and technical requirements test (Non-auto- maticweighinginstrumentsPart 1.Metrologicalandtechnicalrequirement-Test) 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 terms defined in JJF1001 and JJF1181 and the following terms apply to this regulation. 3.1.1 Digital indicating rail scale digitalindicatingrail-weighbridge The electronic equipment used on the railway line, with digital indication function, weighs the railway freight cars at rest Type weighing instrument, also known as static electronic railroad scale. 3.1.2 Loadreceptor The device used to bear the load in the railway scale. Note. The load-bearing of the railway scale can be divided into single load-bearing and multiple load-bearing, usually also called single table and multiple table. 3.1.3 Multi-load digital indicating rail scale multi-load digital indicating rail-weighbridge The number composed of multiple carriers indicates the railway scale. Note. Including the combination of double table, long and short table. 3.1.4 dumperrail-weighbridge Rail scale using the dumper body as the carrier. 3.1.5 Test vehicle for rail-weighbridge Railway special vehicles with known standard quality values used for verification and testing of railway scales are referred to as "checking and weighing vehicles" for short.

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