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JJF 1749-2019: Calibration Specification for Vehicle Contour Dimensions Testers
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJF 1749-2019 | English | 379 |
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Calibration Specification for Vehicle Contour Dimensions Testers
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JJF 1749-2019
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Basic data | Standard ID | JJF 1749-2019 (JJF1749-2019) | | Description (Translated English) | Calibration Specification for Vehicle Contour Dimensions Testers | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A52 | | Classification of International Standard | 17.040 | | Word Count Estimation | 17,169 | | Date of Issue | 2019 | | Date of Implementation | 2019-12-27 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1749-2019: Calibration Specification for Vehicle Contour Dimensions Testers---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.
(Calibration Specification of Automobile External Dimension Tester)
National Measurement Technical Specification of the People's Republic of China
Calibration Specification of Automobile External Dimension Tester
2019-09-27 release
2019-12-27 Implementation
Issued by the State Administration of Market Supervision and Administration
Calibration Specification of Automobile External Dimension Tester
Centralized unit. National Legal Metrology Management Metrology Technical Committee
Main drafting unit. China Institute of Testing Technology
Guizhou Metrology and Testing Institute
Henan Institute of Metrology
Participated in the drafting unit. Chengdu Jiacheng Hongyi Technology Co., Ltd.
Shijiazhuang Huayan Transportation Technology Co., Ltd.
Hefei Qiangkeda Technology Development Co., Ltd.
Zhejiang Jiangxing Automobile Testing Equipment Co., Ltd.
This specification entrusts the National Legal Metrology Management Metrology Technical Committee to interpret
The main drafters of this specification.
Luo Wenbo (China Institute of Testing Technology)
Wang Yong (Guizhou Metrology and Testing Institute)
Qifeng Zhang (Henan Institute of Metrology)
Participating drafters.
Yang Jingyun (Chengdu Jiacheng Hongyi Technology Co., Ltd.)
Kang Jie (Shijiazhuang Huayan Transportation Technology Co., Ltd.)
Yang Huaxi (Hefei Qiang Keda Technology Development Co., Ltd.)
Zhou Shensheng (Zhejiang Jiangxing Automobile Testing Equipment Co., Ltd.)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2 References (1)
3 Overview (1)
4 Measurement characteristics (1)
4.1 Indication error (1)
4.2 Repeatability (1)
5 Calibration conditions (1)
5.1 Environmental conditions (1)
5.2 Measurement standards and other equipment (1)
5.3 Site facilities (2)
6 Calibration items and calibration methods (2)
6.1 Calibration items (2)
6.2 Calibration of indication error (2)
6.3 Repeatability (4)
7 Expression of calibration results (4)
8 Recalibration time interval (4)
Appendix A Calibration Records of Automobile External Dimensions Tester (5)
Appendix B. Calibration certificate (inner page) content (6)
Appendix C Examples of Uncertainty Evaluation of Indication Error Measurement of Automobile Exterior Dimension Detector (7)
Introduction
This specification is based on JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Expression", JJF 1071-2010 "National
The requirements of the “Writing Rules for the Calibration Standards”.
This specification refers to GB 1589-2016 "External Dimensions, Axle Loads and Mass Limits of Automobiles, Trailers, and Trains",
GB 18565-2016 "Comprehensive performance requirements and inspection methods of road transport vehicles", GB 21861-2014 "Motor vehicles
Safety technical inspection items and methods", GB/T 3730.3 "Terms and definitions of vehicles and trailers and vehicle dimensions"
Formulated with GB/T 15089 "Classification of Motor Vehicles and Trailers".
This specification is the first release.
Calibration Specification of Automobile External Dimension Tester
1 Scope
This specification is applicable to the calibration of the car's external dimension detector.
2 Reference documents
This specification refers to the following documents.
GB 1589-2016 Cars, trailers and car trains, external dimensions, axle loads and quality limits
GB/T 3730.3 Terms and Definitions of Automobiles and Trailers
GB 18565-2016 Comprehensive performance requirements and inspection methods of road transport vehicles
GB 21861-2014 Motor vehicle safety technical inspection items and methods
For dated reference documents, only the dated version applies to this specification; for those without date references
The latest version (including all amendments) is applicable to this specification.
3 Overview
The car outline size detector (hereinafter referred to as the detector) is used to automatically measure the car outline size (length, width,
High) devices generally use optical imaging, infrared or laser technology. The detector mainly includes the front-end collection system
System and back-end analysis processing system.
4 Metering characteristics
4.1 Indication error
According to 5.1.1.1 in GB 18565-2016 and Appendix A.1.2 in GB 21861-2014, the maximum length is
Allowable error. ±0.8% or ±50mm; width and height maximum allowable error. ±0.8% or ±20mm.
4.2 Repeatability
Generally not more than 0.8%.
Note. The above indicators are not suitable for qualification judgment, and are for reference only.
5 Calibration conditions
5.1 Environmental conditions
5.1.1 Ambient temperature. -10℃~45℃;
5.1.2 Environmental relative humidity. not more than 85%.
5.1.3 Calibration should be performed in an environment free of pollution, light, vibration, electromagnetic interference, etc.
5.2 Measurement standards and other equipment
See Table 1 for measurement standards and other equipment.
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