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www.ChineseStandard.net Database: 189760 (18 Oct 2025)

JJG 656-2013 English PDF

US$369.00 · In stock
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JJG 656-2013: Verification Regulation of Nitrate-Nitrogen Automatic Analyzers
Status: Valid

JJG 656: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 656-2013	English	369	Add to Cart	3 days [Need to translate]	Verification Regulation of Nitrate-Nitrogen Automatic Analyzers	Valid	JJG 656-2013
JJG 656-1990	English	599	Add to Cart	4 days [Need to translate]	Verification Regulation of Nitrate Automatic Monitor	Obsolete	JJG 656-1990

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Basic data

Standard ID	JJG 656-2013 (JJG656-2013)
Description (Translated English)	Verification Regulation of Nitrate-Nitrogen Automatic Analyzers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Classification of International Standard	17.020
Word Count Estimation	16,123
Older Standard (superseded by this standard)	JJG 656-1990
Regulation (derived from)	AQSIQ Announcement No. 122 2013
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to: electrode method and spectrophotometry automatic monitor nitrate -based initial verification, testing and use of the follow-up examination.

JJG 656-2013: Verification Regulation of Nitrate-Nitrogen Automatic Analyzers

---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.
Verification Regulation of Nitrate-Nitrogen Automatic Analyzers State verification procedures People's Republic of China Nitrate Diver Issued on. 2013-09-02 2014-03-02 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Nitrate Diver Verification Regulation AutomaticAnaly zers Replacing JJG 656-1990 Focal point. the National Technical Committee on Environment stoichiometry Main drafting unit. Shanghai Institute of Measurement and Testing Participated in the drafting unit. Jiangsu Province Institute of Metrology Shanghai Electronics Science Instrument Co., Ltd. This procedure commissioned the National Technical Committee of the stoichiometric environment responsible for interpreting The main drafters of this procedure. Ding Min (Shanghai Institute of Measurement and Testing) Gu Wei Ran (Shanghai Institute of Measurement and Testing) Gongfei Yan (Shanghai Institute of Measurement and Testing) Drafters participate. Cai Ye Qiang (Jiangsu Province Institute of Metrology) Jiangxiao Xiong (Jiangsu Province Institute of Metrology) Wang Qiaomei (Shanghai Electronics Science Instrument Co., Ltd.)

Introduction (Ⅲ) 1 Scope (1) 2 Overview (1) 3 metering performance requirements (1) 4 General Requirements (1) 4.1 Appearance (1) 4.2 Safety Requirements (2) 5 control of measuring instruments (2) 5.1 verification Conditions (2) 5.2 Verification Project (2) 5.3 Verification Methods (3) 6 test results processing (4) 7 test cycle (4) A standard solution of nitrate formulated appendix (5) Appendix B Nitrate Diver Verification original records (6) Appendix C calibration certificate/test results in the notice page format (8)

Introduction

JJG 656-2013 "Nitrate Diver" is JJG 656-1990 "nitrate Diver" Amendments. Compared with JJG 656-1990 "nitrate automatic monitoring instrument", in addition to editorial changes, the main technical change Of the following. --- Name change procedures to "nitrate nitrogen Diver"; --- Revised overview of Nitrate automatic monitor Principle and purpose (see 2); --- Remove the original statutes of electric meter performance requirements; --- Revised stability program technical requirements and test methods (see Table 1 and 5.3.4); --- Revised indication error, repeatability, stability and response time test project using standard mass concentration solution (See 5.3.2,5.3.3,5.3.4,5.3.5); --- Increased dielectric strength and leakage current test project requirements (see 4.2 and 5.3.6); --- Increased the list of test items of measuring instruments control (see Table 2); --- Revised Appendix 1 for preparing standard solution and the buffer solution (see Appendix A). Nitrate Diver verification procedures

1 Scope

The order applies to electrode method based on spectrophotometric and online automatic monitor nitrate initial verification, follow-up inspection And given the use of checks.

2 Overview

Nitrate Diver automatic continuous monitoring of groundwater, surface water, sewage and industrial waste water and other water bodies The nitrate concentrations. Nitrate Diver measurement method and the main electrode. Spectrophotometry by measuring a specific wavelength The absorbance of water samples quantitative determination of nitrate nitrogen content; electrode is obtained nitrate in water samples by measuring the electrode potential Acid nitrogen content. Instrument consists of sampling, processing water samples, testing, data acquisition, processing, display and transmission unit.

3 metering performance requirements

Performance measurement instrument requirements in Table 1. Table 1 nitrate nitrogen automatically monitors the performance measurement requirements Project Performance Requirements Indication error ± 10% Repeatability ≤3% No more than ± 10% within 4h stability Response time * ≤10min Note. Fields marked "*" are the only electrode instrument calibration project, the same below.

4 General technical requirements

4.1 Appearance 4.1.1 All equipment parts and accessories should be tight and not loose; connector should be connected well; moving parts should be free movement Live, smooth; pipe connection ports inside and outside the various instruments must be reliably sealed to prevent leakage. After the instrument is powered, the components are To work properly, all knobs, buttons shall be able to adjust the display unit displays the results should be clear and complete. All newly manufactured instrument plating surface 4.1.2 There shall be no peeling, painted surface color should be uniform, not Ariake Obvious scratches, show the bottom of cracks, blistering and corrosion phenomenon, the exposed parts joints should be neat, no rough phenomenon. The use of the instrument should not affect the normal operation of its damage. 4.1.3 Instrument nameplate should be marked with the instrument name, model, serial number, date of manufacture, manufacturer's name, manufacturing measurement Appliance license logo and number.

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