JJF 1609-2017 English PDF

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JJF 1609-2017: Calibration Specification for Residual Chlorine Meters
Status: Valid

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JJF 1609-2017	329	Add to Cart	3 days	Calibration Specification for Residual Chlorine Meters	Valid

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Basic data

Standard ID: JJF 1609-2017 (JJF1609-2017)
Description (Translated English): Calibration Specification for Residual Chlorine Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A61
Classification of International Standard: 17.020
Word Count Estimation: 14,154
Date of Issue: 2017-02-28
Date of Implementation: 2017-05-28
Regulation (derived from): General Administration of Quality Supervision, Inspection and Quarantine No. 23 of 2017
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the colorimetric principle of chlorine analyzer calibration, including the determination of residual chlorine in water and (and) the total residual chlorine analyzer.

JJF 1609-2017: Calibration Specification for Residual Chlorine Meters

---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 Residual Chlorine Meters National Metrological Technical Code of the People's Republic of China Calibration standard for chlorine analyzer 2017-02-28 released 2017-05-28 Implementation State Administration of Quality Supervision, Inspection and Quarantine issued Calibration standard for chlorine analyzer Responsible unit. National Environmental Chemical Metrology Technical Committee The main drafting unit. Shanghai Institute of Metrology and Testing Technology China Guangzhou Analysis and Testing Center Participated in the drafting unit. Zhejiang Institute of Metrology Hach Water Quality Analysis Instrument (Shanghai) Co., Ltd This specification entrusts the National Environmental Chemistry Metrology Technical Committee to explain The main drafters of this specification. Chen Jingwen (Shanghai Institute of Metrology and Testing Technology) Luo Jun (China Guangzhou Analysis and Testing Center) Li Zhiyi (Shanghai Institute of Metrology and Testing Technology) Participate in the drafters. Bai Jing (Shanghai Institute of Metrology and Testing Technology) Lin Zhen (Zhejiang Institute of Metrology) Feng Xuan (Zhejiang Institute of Metrology) Zheng Bo [Hach Water Quality Analysis Instrument (Shanghai) Co., Ltd.]

table of Contents

Introduction (II) 1 Scope (1) 2 terms and units of measurement (1) 2.1 free residual chlorine (1) 2.2 Compounds Residual Chlorine (1) 2.3 residual chlorine (total residual chlorine) (1) 3 Overview (1) 4 Metering characteristics (1) 5 Calibration conditions (2) 5.1 Environmental conditions (2) 5.2 Reference materials and other equipment (2) 6 Calibration items and calibration methods (2) 6.1 Indication error (2) 6.2 Repeatability (2) 7 Expression of calibration results (3) 8 re-school time interval (3) Appendix A Examples of Uncertainty Evaluation of Indication Error (4) Appendix B Residual Chlorine Detector Recording Format (for reference) (8) Appendix C Calibration Certificate (End page) Format (for reference) (9)

Introduction

This specification is based on JJF 1071-2010 "national measurement calibration standard preparation rules", JJF 1059.1-2012 "test Assessment and representation of uncertainty, "JJF 1001-2011" General measurement terms and definitions "provisions of the preparation, reference ASTM D1253-2014 "Standard Test Method for Residual Chlorine in Water" (StandardTestMethodforRe- sidualChlorinein Water), GB/T 14424-2008 "Determination of residual chlorine in industrial circulating cooling water" HJ586-2010 "Determination of free chlorine and total chlorine in water, N, N-diethyl-1,4-phenylenediamine spectrophotometry" Sub-content. This specification is the first release. Calibration standard for chlorine analyzer

1 Scope

The calibration standard applies to the colorimetric principle of the residual chlorine analyzer calibration, including the determination of residual chlorine in water or (and) Total residual chlorine analyzer.

2 terms and units of measurement

2.1 free residual chlorine freeresidualchlorine Refers to chlorine present in the form of hypochlorous acid, hypochlorite ion and dissolved monochlorium chloride. 2.2 combined residual chlorine residualresidualchlorine Refers to chlorine in the form of chloramines and organochlorines. 2.3 residual chlorine (total residual chlorine) totalresidualchlorine Refers to chlorine in the form of "free residual chlorine" or "chemical residual chlorine", or both. Residual chlorine units. mg/L.

3 Overview

Residual chlorine refers to the water after disinfection of residual chlorine in water, is an important indicator of water quality evaluation, it is mainly used for self Water production, medical wastewater treatment and other areas of water quality monitoring. Residual chlorine analyzer is the use of colorimetric method of work, the root Quantitative analysis of the absorbance of the colored material produced at the specific wavelength after the reaction of residual chlorine in the water with the developer is carried out. The measurement principle is based on the Lambert-Beer light absorption law. A = -lg I0 = -lgT = kcL Where. A --- absorbance; I0 --- incident light intensity; I - transmitted light intensity; T --- transmittance; k - absorption coefficient; c - the amount of residual chlorine in the sample; L - Light path through the sample. The instrument is mainly composed of light source, sample room, detector and data processing unit and so on, as shown in Fig. Light source → sample chamber → detector → data processing unit Figure 1 Schematic diagram of the structure of the chlorine detector

4 measurement characteristics

4.1 indication error. no more than ± 10%. ......

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