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JJF 1225-2009: Calibration Specification for Transmittance Meter of Automobile
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JJF 1225: Historical versions

Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
JJF 1225-2009	English	309	Add to Cart	3 days [Need to translate]	Calibration Specification for Transmittance Meter of Automobile
JJF 1225-1990	English	319	Add to Cart	3 days [Need to translate]	O.T.N. for Water flow primary standard in the Range from 1.6 to 146m3/h

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Basic data

Standard ID	JJF 1225-2009 (JJF1225-2009)
Description (Translated English)	Calibration Specification for Transmittance Meter of Automobile
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A60
Classification of International Standard	17.180
Word Count Estimation	13,175
Date of Issue	2009-07-10
Date of Implementation	2009-10-10
Quoted Standard	GB 7258-2004; JJF 1059-1999
Regulation (derived from)	AQSIQ Announcement No. 78 of 2009
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to cars with a light transmittance meter (hereinafter referred to as transmittance meter) calibration. This standard specifies the transmittance meter performance measurement and calibration methods.

Similar standards

JJG 879| JJF 1106| JJG 810|JJF 2003|

JJF 1225-2009: Calibration Specification for Transmittance Meter of Automobile

---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 for Transmittance Meter of Automobile National Metrological Technical Code of the People's Republic of China Standard for calibration of light transmittance for automobiles 2009-07-10 released 2009-10-10 Implementation State Administration of Quality Supervision, Inspection and Quarantine issued Standard for calibration of light transmittance for automobiles JJF 1225.2009 The specification by the State Administration of Quality Supervision, Inspection and Quarantine on July 10,.2009 approved and since October 10,.2009 from the implementation. Responsible unit. National legal system management metrology technical committee The main drafting unit. Jilin Institute of Metrology China Metrology Association Motor Vehicle Metrology Testing Technology Working Committee Participated in the drafting unit. Zhejiang Jiangxing Automobile Testing Equipment Co., Ltd Foshan Analyst Co., Ltd Gansu Institute of Metrology Shanghai Tongyun Automobile Technology Co., Ltd This specification is interpreted by the National Law Management Metrology Technical Committee The main drafters of this specification. Yan Youyu (Jilin Institute of Metrology) FANG Fa-cheng (Jilin Institute of Metrology) Bao Guohua (China Metrology Association Motor Vehicle Measurement and Testing Technology Working Committee) Participate in the drafters. Zhou Shensheng (Zhejiang Jiangxing Automobile Testing Equipment Co., Ltd.) He Guihua (Foshan Analyst Co., Ltd.) Gao Decheng (Gansu Institute of Metrology) Xu Ji (Shanghai Tongyun Automobile Technology Co., Ltd.)

1 Scope (1) 2 References (1) 3 Terminology (1) 4 Overview (1) 5 Metering characteristics (1) 5.1 Basic parameters (1) 5.2 Technical requirements (1) 6 Calibration conditions (2) 6.1 Calibration of environmental conditions (2) 6.2 Calibration standard and ancillary equipment (2) 7 Calibration items and calibration methods (2) 7.1 drift (2) 7.2 Indication error (2) 7.3 Repeatability (3) 8 Calibration results (3) 8.1 Calibration Certificate (3) 8.2 Uncertainty of measurement of calibration results (3) 9 re-school time interval (3) Appendix A Standard Neutral Filter Transmittance (4) Appendix B Calibration Record Format (5) Appendix C Certificate of Calibration (6) Appendix D Evaluation of Uncertainty in Indication of Light Transmittance (7) Standard for calibration of light transmittance for automobiles

1 Scope

This specification is applicable to the calibration of a light transmittance meter (hereinafter referred to as "light transmittance meter"). This specification specifies the metering performance and calibration method of the light transmittance meter.

2 References

GB 7258-2004 "safety conditions for motor vehicle operation" JJF 1059-1999 "Measurement Uncertainty Evaluation and Representation" Use this specification to use the current valid version of the cited literature.

3 terminology

3.1 visible light transmittance transmittanceofvisiblelight The ratio of the transmitted radiation flux or the luminous flux to the incident flux when the incident radiation is in the visible spectrum interval. Its character Is τ. 3.2 visual function functionofphotopicvision Human visual system for different wavelengths of light sensitivity is different, that is, the degree of response of the human eye to light is the wavelength of the letter number. But each person's visual function has individual differences, in order to have a uniform standard, the International Commission on Illumination (CIE) published the experimental value V (λ) standard value on the basis of experimental data in 1971, Interim measurement committee approval.

4 Overview

The light transmittance meter is used to measure the visible light transmittance of the glass in the driver's viewing area. Transmittance meter measurement principle is to make a certain luminous flux of the incident light through the measured glass, the other side of the measured glass, The light flux of the transmitted light is measured by the light receiving sensor, and the ratio of the transmitted light flux to the incident light flux is calculated. Determine the transmittance of the measured glass. Transmittance meter generally consists of light source components, light receiving sensors and display instruments.

5 measurement characteristics

5.1 basic parameters 5.1.1 Measuring range. 0 ~ 100.0%. 5.1.2 Resolution. 0.1%. 5.2 Technical requirements ...

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