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JJF 1212-2023 English PDF

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JJF 1212-2023: Calibration Specification for Portable Automatic Instruments for Weighing Axle Loads of Vehicle in Motion
Status: Valid

JJF 1212: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJF 1212-2023English369 Add to Cart 4 days [Need to translate] Calibration Specification for Portable Automatic Instruments for Weighing Axle Loads of Vehicle in Motion Valid JJF 1212-2023
JJF 1212-2008English1039 Add to Cart 5 days [Need to translate] Calibration specification of portable weighing instruments for axles of vehicle in motion Obsolete JJF 1212-2008
JJF 1212-1990English199 Add to Cart 2 days [Need to translate] Operating technical norm of secondary standard of flatness Obsolete JJF 1212-1990

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Basic data

Standard ID JJF 1212-2023 (JJF1212-2023)
Description (Translated English) Calibration Specification for Portable Automatic Instruments for Weighing Axle Loads of Vehicle in Motion
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 18,162
Date of Issue 2023-10-12
Date of Implementation 2024-04-12
Issuing agency(ies) State Administration for Market Regulation

JJF 1212-2023: Calibration Specification for Portable Automatic Instruments for Weighing Axle Loads of Vehicle in Motion


---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 Calibration specifications for portable dynamic axle load gauges Released on 2023-10-12 Implemented on 2024-04-12 Released by the State Administration for Market Regulation Calibration specifications for portable dynamic axle load gauges Replace JJF 1212-2008 Responsible unit: National Technical Committee on Weighing Instruments and Metrology, Automatic Weighing Instruments Sub-Technical Committee Main drafting unit: Shandong Institute of Metrology Gansu Institute of Metrology Qinghai Provincial Institute of Metrology, Verification and Testing Participating units in the drafting: Qingdao Institute of Metrology Guangdong Hualan Haidian Measurement Technology Co:, Ltd: This specification is entrusted to the Automatic Weighing Instrument Sub-Technical Committee of the National Technical Committee on Weighing Instruments and Metrology to be responsible for interpretation: The main drafters of this specification: Shen Dongbin (Shandong Institute of Metrology) Lu Xinguang (Shandong Institute of Metrology) Han Xinghai (Gansu Institute of Metrology) Zu Shaohu (Qinghai Provincial Institute of Metrology, Verification and Testing) Participating drafters: Wang Junguo (Qingdao Institute of Metrology) Wu Chang (Guangdong Hualan Haidian Measurement Technology Co:, Ltd:)

Table of contents

Introduction(Ⅱ) 1 Scope(1) 2 Cited documents(1) 3 Terminology and units of measurement(1) 3:1 Terminology(1) 3:2 Unit of measurement(2) 4 Overview(2) 5 Measuring characteristics(2) 6 Calibration conditions(2) 6:1 Environmental conditions(2) 6:2 Measurement standards and other equipment(2) 7 Calibration items and calibration methods (3) 7:1 Calibration items (3) 7:2 Calibration method(3) 8 Calibration result expression(6) 9 Re-schooling time interval(6) Appendix A Calibration record format (7) Appendix B Calibration certificate information and inner page format (9) Appendix C Example of uncertainty assessment of measurement results (10)

Introduction

JJF 1071-2010 "Rules for Writing National Metrology Calibration Specifications", JJF 1001-2011 "General Metrology Terminology" "Terms and Definitions" and JJF 1059:1-2012 "Evaluation and Expression of Measurement Uncertainty" together constitute the support for the preparation of this specification: Basic series of specifications for ordering work: This specification replaces JJF 1212-2008 "Portable Dynamic Axle Load Instrument": This specification mainly refers to JJG907- 2006 Relevant technical requirements and methods of "Dynamic Highway Vehicle Automatic Weighing Instruments": Compared with JJF 1212-2008, in addition to editorial modifications, the main changes in this specification are as follows: ---Modified the definitions and English equivalents of some terms; ---Modified some contents in the overview; ---Modified the requirements for measurement characteristics; ---Modified the calibration record format of Appendix A; ---Modified the format of the inner pages of the calibration certificate in Appendix B; ---Modified Appendix C Measurement Uncertainty Assessment Example; ---Deleted the requirement for accuracy level; ---Deleted the requirement for maximum allowable error; ---Deleted the requirement for static calibration: The previous releases of this specification are as follows: ---JJG1212-2008: Calibration specifications for portable dynamic axle load gauges

1 Scope

This specification applies to the calibration of portable dynamic axle load gauges:

2 cited documents

This specification references the following documents: JJG99 weight JJG907 dynamic road vehicle automatic scale JJF 1181 Weighing instrument measurement terms and definitions For dated references, only the dated version applies to this specification; for undated references, only the dated edition applies: The latest version (including all modification orders) shall apply to this specification:

3 Terminology and units of measurement

3:1 Terminology The following terms and definitions defined in JJG907 and JJF 1181 apply to this specification: Weigh each axle (axle group) of the moving vehicle separately, and the weighing results of the axes (axle group) can be automatically accumulated to obtain A dynamic truck scale that obtains the total vehicle mass and axle (axle group) load: vehicleinmotion Dynamic axle weight scale designed for easy movement: It is characterized by two separate tables that bear the weight of the vehicle at both ends of the vehicle axle: wheel load, forming a complete carrier: 3:1:3 Wheelload wheelload The sum of all tire loads on one end of the axle: Wheel loads can be single tire loads or dual tire loads: [Source: JJG907-2006, T:3:1:9, with modifications] 3:1:4 Axle load axleload The portion of the vehicle mass supported by the shaft on the carrier when weighing: Conventional true value of single axle load for a biaxial rigid vehicle determined under static conditions: [Source: JJG907-2006,T:3:1:12] The total mass of the vehicle, including the total mass of the vehicle combination of all connected parts: [Source: JJG907-2006,T:3:1:14] The average value of the axis (axle group) load corrected by the correction coefficient: Calculate the corrected average value of the shaft (axle group) load as

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