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JJG 688-2017 English PDF

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Q: Should I purchase the latest version JJG 688-2017?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 688-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$459.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 688-2017: Vehicle Exhaust Emissions Measuring Instruments
Status: Valid

JJG 688: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 688-2017	459	Add to Cart	4 days	Vehicle Exhaust Emissions Measuring Instruments	Valid
JJG 688-2007	RFQ	ASK	5 days	Verification Regulation of Vehicle Exhaust Emissions Measuring Instruments	Obsolete
JJG 688-1990	319	Add to Cart	3 days	Verification Regulation of Vehicle Exhaust Emission Measuring Instruments	Obsolete

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Basic data

Standard ID: JJG 688-2017 (JJG688-2017)
Description (Translated English): Vehicle Exhaust Emissions Measuring Instruments
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A61
Classification of International Standard: 13.040
Word Count Estimation: 20,245
Date of Issue: 2017-11-20
Date of Implementation: 2018-05-20
Older Standard (superseded by this standard): JJG 688-2007
Quoted Standard: JJF 1481-2014; GB/T 11606; GB 18285-2005; ISO/PAS 3930-2009
Regulation (derived from): AQSIQ Notice 2017 No. 103
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard is applicable to the first verification, subsequent verification and in-use inspection of automotive exhaust gas testers (hereinafter referred to as the tester). The minimum measurement range of the tester should meet HC: (0~2 000)X10^(-6); CO: (0. 00 to 5. 00) X 10 ^ (-2); CO 2 : (0. 0 to 16.0) X 10 (-2); NO: (0 to 4000) X 10^(-6); O 2 : ( 0 to 21.0) X10^(-2).

JJG 688-2017: Vehicle Exhaust Emissions Measuring Instruments

---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.
Vehicle Exhaust Emissions Measuring Instruments National Metrology Verification Regulations of the People's Republic Automotive exhaust gas tester Released on.2017-11-20 2018-05-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Automobile emission gas tester verification procedures Replace JJG 688-2007 Focal Point. National Legal Measurement Management Measurement Technical Committee Main drafting unit. Inner Mongolia Autonomous Region Metrology and Testing Institute Guangdong Institute of Metrology China Metrology Association Participated in the drafting unit. Jilin Institute of Metrology Beijing Institute of Metrology and Measurement Science Foshan Analyzer Co., Ltd. This regulation entrusts the National Legal Metrology Management Metrology Technical Committee to explain The main drafters of this procedure. Yan Jun (Institute of Metrology and Measurement, Inner Mongolia Autonomous Region) Quan Xiaoyu (Guangdong Institute of Metrology) Luo Xinyuan (China Metrology Association) Participate in the drafters. Chen Linying (Institute of Metrology and Measurement, Inner Mongolia Autonomous Region) Liu Yu (Beijing Institute of Metrology and Measurement Science) Fang Facheng (Jilin Institute of Metrology) He Guihua (Foshan Analyzer Co., Ltd.)

Introduction (II) 1 Scope (1) 2 References (1) 3 terms and units of measurement (1) 3.1 Terms and Definitions (1) 3.2 Unit of measurement (1) 4 Overview (1) 5 Metrological performance requirements (2) 5.1 Display resolution (2) 5.2 indication error (2) 5.3 Stability (3) 5.4 Repeatability (3) 5.5 Response time (3) 6 General technical requirements (3) 6.1 Appearance and general requirements (3) 6.2 Electrical safety performance (3) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification project (4) 7.3 Verification method (4) 8 Processing of verification results (7) 9 verification cycle (7) Appendix A Standard Gases and Their Concentration Requirements (8) Appendix B Verifying the Original Record Format (9) Appendix C Verification certificate page format (12) Appendix D Format of the verification result page (14)

Introduction

This regulation is based on JJF1002-2010 "Rules for the preparation of national metrological verification procedures", JJF1001-2011 Based on measurement terminology and definitions, JJF1059.1-2012 "Measurement Uncertainty Evaluation and Representation", The JJG 688-2007 version was revised. Compared with JJG 688-2007, the main changes except editorial changes are as follows. --- Deleted the "Scope" in the "type evaluation test related items can refer to this procedure." ---Delete JJF1001-1998 "General Terms and Definitions" and "JJF1059" in "Reference Documents" 1999 “Measurement and Expression of Measurement Uncertainty”, GB/T 11606 “Environmental Test Methods for Analytical Instruments” was added. --- Adjusted the content of "terms and units of measurement". --- Adjusted the contents of the "Overview". --- Removed zero drift, indication drift and the need for "Class II tester" in "Metric Performance Requirements" begging. Increased insulation strength and stability requirements, "measurement range" adjusted to "minimum measurement range", adjusted O2 The technical requirements of the resolution. --- Adjusted the contents of the "certification project" and "validation method", deleted the zero drift and the indication drift, The insulation strength and stability were added, and the contents of indication error, repeatability, and response time were adjusted. --- Adjusted the contents of "Appendix B", "Appendix C" and "Appendix D". --- Removed "Appendix E" and "Appendix F". The previous versions of this procedure are released. ---JJG 688-2007; ---JJG 688-1990. Automobile emission gas tester verification procedures

1 Scope

This procedure is applicable to the first verification, subsequent verification and making of the automobile emission gas tester (hereinafter referred to as the tester). In the middle inspection, the minimum measurement range of the tester should meet HC. (0~2000)×10-6; CO. (0.00~5.00)× 10-2; CO2. (0.0~16.0) × 10-2; NO. (0~4000) × 10-6; O2. (0.0~21.0) × 10-2.

2 reference files

This procedure refers to the following documents. JJF1481-2014 Automobile emission gas tester type evaluation outline GB/T 11606 analytical instrument environmental test method GB 18285-2005 Limiting and measuring methods for emission of pollutants from ignited engines (double idling method) And simple working conditions method) ISO /PAS3930.2009 (E) Instrumentation and technical requirements for measuring vehicle exhaust emissions; Management and performance testing (Instrumentsformeasuringvehicleexhaustemissions-Metrologicaland Technicalrequirements;Metroologicalcontrolandperformancetests) For dated references, only the dated version applies to this Code; any undated quotation The latest version (including all amendments) applies to this procedure.

3 terms and units of measure

3.1 Terms and definitions The terms and definitions defined by JJF1481-2014 and below apply to this procedure. 3.1.1 non-dispersedinfraredspectroscopicanalysis (JJF1481- 2014, 3.1) Based on the principle that different gas molecules (CO, CO2, HC, etc.) have different characteristic wavelengths for light absorption, Infrared light that does not separate light passes through a certain gas, and determines a certain kind of gas in the gas according to the degree of absorption of light of different wavelengths. Analytical method of concentration. 3.1.2 Electrochemical analysis (electrochemical analysis) (JJF1481-2014, 3.2) Oxidation (or reduction) reaction on the surface of a sensitive electrode based on the electrochemical principle of gas, with gas The principle that the concentration change reaction current also changes, and the analysis method of the gas concentration is determined according to the magnitude of the reaction current. 3.2 Unit of measurement The tester uses a legal unit of measurement, and the measurement results of the gas content of each component are expressed by volume fraction, wherein. The CO, CO2, O2 volume fraction is expressed as "%" or "×10-2"; The HC and NO volume fractions are expressed as "x10-6".

4 Overview

The tester is an instrument used to measure the concentration of exhaust gas from a ignited engine vehicle. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 688-2017_English be delivered?

Answer: Upon your order, we will start to translate JJG 688-2017_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 JJG 688-2017_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 688-2017_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.

Question 5: Should I purchase the latest version JJG 688-2017?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 688-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.