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JJG 769-2009: Verification Regulation of Torque Standard Machines
Status: Valid JJG 769: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 769-2009 | English | 349 |
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Verification Regulation of Torque Standard Machines
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JJG 769-2009
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| JJG 769-1992 | English | 439 |
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Verification Regulation of Torque Standard Machine
| Obsolete |
JJG 769-1992
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PDF similar to JJG 769-2009
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Count Estimation | 15,137 | | Date of Issue | 2009-10-09 | | Date of Implementation | 2010-04-09 | | Older Standard (superseded by this standard) | JJG 769-1992 | | Quoted Standard | JJF 1011-2006 | | Regulation (derived from) | AQSIQ Announcement No. 113 of 2009 | | Issuing agency(ies)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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