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JJF 1796-2020 English PDF

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US$489.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1796-2020: Calibration Specification for Retroreflective Standards
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1796-2020	489	Add to Cart	4 days	Calibration Specification for Retroreflective Standards	Valid

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Basic data

Standard ID: JJF 1796-2020 (JJF1796-2020)
Description (Translated English): Calibration Specification for Retroreflective Standards
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A60
Classification of International Standard: 17.180
Word Count Estimation: 22,211
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1796-2020: Calibration Specification for Retroreflective Standards

---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 standards for retroreflective standards) National Metrology Technical Specifications of the People's Republic of China Calibration specification for retroreflective standards 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Calibration specification for retroreflective standards Focal point. National Technical Committee of Special Measuring Instruments for Highways Main drafting unit. Institute of Highway Science, Ministry of Transport Participated in the drafting. National Transportation Safety Facilities Quality Supervision and Inspection Center National Road and Bridge Engineering Testing Equipment Metering Station China Institute of Metrology This specification entrusts the National Highway Special Measuring Instruments Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Su Wenying (Institute of Highway Science, Ministry of Transport) Wang Yixu (Institute of Highway Science, Ministry of Transport) Zhou Yishu (Institute of Highway Science, Ministry of Transport) Participating drafters. Zhu Chuanzheng (National Transportation Safety Facilities Quality Supervision and Inspection Center) Leng Zhengwei (National Road and Bridge Engineering Testing Equipment Measuring Station) Chundi Zheng (China Institute of Metrology) Lin Zhidan (National Road and Bridge Engineering Testing Equipment Metering Station)

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Term (1) 4 Overview (2) 5 Measurement characteristics (2) 6 Calibration conditions (4) 7 Calibration items and calibration methods (6) 8 Calibration results (7) 9 Recheck interval (7) Appendix A Calibration record style of retroreflective standard device (8) Appendix B Retroreflective Standard Calibration Certificate Information and Inner Page (13) Appendix C Example of Uncertainty Evaluation of Retroreflective Value Calibration of Retroreflective Standards (14)

Introduction

This specification is based on JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" will be formulated. This specification is released for the first time. Calibration specification for retroreflective standards

1 Scope

This specification applies to the calibration of retroreflective standards.

2 Reference documents

This specification refers to the following documents. JJF 1059.1 Evaluation and expression of measurement uncertainty GB/T 18833 Road traffic reflective film GB/T 24717 Road pre-formed marking tape GB/T 24725 Protruding road signs GB/T 26377 Retroreflective measuring instrument JT/T 688-2007 Retroreflective terminology For dated reference documents, only the dated version applies to this specification; for undated reference documents, The latest version (including all amendments) is applicable to this specification.

3 term

The following terms and definitions defined in JT/T 688-2007 apply to this specification. 3.1 Retroreflectivestandard Certified reference material used to calibrate retroreflective measuring instruments. 3.2 datummark Use the arrow to mark on the back of the retroreflective standard or an appropriate position to indicate the direction of sample placement during calibration. The arrow direction is 0° reference direction (referred to as "reference direction"), which can be changed by rotating the corresponding angle counterclockwise during calibration. Change the reference direction. 3.3 retroreflection Reflected light is a kind of reflection that returns from the opposite direction close to the incident light. [JT/T 688-2007,2.1] 3.4 entrance angle The angle between the illumination axis and the reference axis is represented by β. Note. The incident angle β is decomposed into two components β1 and β2 in the goniometer system, usually not greater than 90°. [JT/T 688-2007,2.21] 3.5 Observation Angle The angle between the illumination axis and the observation axis is represented by α. Note. The observation angle is not a negative value, usually less than 2°. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1796-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1796-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1796-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1796-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.