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JJG 769-2009 English PDF

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JJG 769-2009: Verification Regulation of Torque Standard Machines
Status: Valid

JJG 769: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 769-2009English349 Add to Cart 3 days [Need to translate] Verification Regulation of Torque Standard Machines Valid JJG 769-2009
JJG 769-1992English439 Add to Cart 4 days [Need to translate] Verification Regulation of Torque Standard Machine Obsolete JJG 769-1992

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Basic data

Standard ID JJG 769-2009 (JJG769-2009)
Description (Translated English) Verification Regulation of Torque Standard Machines
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.100
Word Count Estimation 15,137
Date of Issue 2009-10-09
Date of Implementation 2010-04-09
Older Standard (superseded by this standard) JJG 769-1992
Quoted Standard JJF 1011-2006
Regulation (derived from) AQSIQ Announcement No. 113 of 2009
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to static weight and lever-type torque standard machine (hereinafter referred to as torque standard machine) for initial verification, testing and use of follow-up inspection.

JJG 769-2009: Verification Regulation of Torque Standard 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.
Verification Regulation of Torque Standard Machines National Metrology Verification Regulations of the People's Republic Torque standard machine Released on.2009-10-09 2010-04-09 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Torque standard machine verification procedure Replace JJG 769-1992 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on October 09,.2009, and Effective April 09,.2010. Focal Point. National Strength Hardness Measurement Technical Committee Main drafting unit. China Institute of Metrology CSIC Research Institute No. 704 China Aviation Industry First Group Corporation Beijing Great Wall Metrology and Testing Technology graduate School Participated in drafting unit. Shanghai Institute of Metrology and Testing Technology Kunshan Innovation and Technology Testing Instrument Co., Ltd. Shenzhen Institute of Metrology and Quality Inspection This regulation entrusts the National Force Value Hardness Measurement Technical Committee to explain The main drafters of this procedure. Guo Bin (China Institute of Metrology) Li Tao (The 704th Research Institute of CSIC) Qin Haifeng (China Aviation Industry First Group Corporation Beijing Great Wall Metrology Test Institute of Technology) Participate in the drafters. Cheng Yong (Shanghai Institute of Metrology and Testing Technology) Tao Zecheng (Kunshan Innovation Technology Testing Instrument Co., Ltd.) Huang Shiyuan (Shenzhen Metrology and Quality Inspection Institute)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 5 General technical requirements (2) 6 measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification project and verification method (3) 6.3 Processing of verification results (5) 6.4 Verification cycle (5) Appendix A Calibration Flow Chart (6) Appendix B Torque Standard Machine Certificate Internal Page Format (7) Appendix C Torque Standard Machine Verification Result Notice Page Format (8) Appendix D Torque Standard Machine Calibration Record Format (9) Torque standard machine verification procedure

1 Scope

This procedure applies to the first verification and after the static and heavy-duty torque standard machine (hereinafter referred to as the torque standard machine). Continued verification and in-use inspection.

2 Citations

This procedure refers to the following documents. JJF1011-2006 Terms and Definitions of Force and Hardness Measurement Use of this procedure should take care to use the current valid version of the above cited documents.

3 Overview

The torque standard machine uses the weight of the weight as the standard force value, and is directly or after a certain lever mechanism is amplified. The action of the overforce arm lever produces a standard torque.

4 Metrological performance requirements

4.1 Torque Standard The weight of the machine and the maximum allowable error of the lever arm length are shown in Table 1. Static weight torque standard machine The weight of each level of weight is calculated according to formula (1). The weight of each level of the lever type torque standard machine is calculated according to formula (2). Table 1 Weight quality and maximum allowable error of lever arm length Maximum allowable error of accuracy level weight (%) Maximum allowable error of lever arm length (%) 0.03 ±0.003 ±0.01 0.05 ±0.005 ±0.015 0.1 ±0.01 ±0.03 0.3 ± 0.03 ± 0.1 m= gL(1-ρa/ρw) (1) m= gL(1-ρa/ρw)k (2) Where. m---weight quality, kg; M---torque to be generated, Nm; g---Gravitational acceleration of the torque standard machine installation location, m/s2; L---(main) lever arm length, m; Ρa---air density, kg/m3; Ρw---weight of material weight, kg/m3;

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