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JJG 631-2013 English PDF (JJG631-2004, JJG631-1989)

JJG 631-2013_English: PDF (JJG631-2013)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 631-2013English160 Add to Cart 0--9 seconds. Auto-delivery Verification Regulation of Ammonia-Nitrogen Automatic Analyzers Valid JJG 631-2013
JJG 631-2004English519 Add to Cart 4 days [Need to translate] Ammonia Analyzers Obsolete JJG 631-2004
JJG 631-1989English279 Add to Cart 3 days [Need to translate] Verification Regulation for Ammonia Automatic Monitor Obsolete JJG 631-1989


BASIC DATA
Standard ID JJG 631-2013 (JJG631-2013)
Description (Translated English) Verification Regulation of Ammonia-Nitrogen Automatic Analyzers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 17,144
Older Standard (superseded by this standard) JJG 631-2004
Drafting Organization Shanghai Institute of Measurement and Testing
Administrative Organization National Technical Committee on Environment stoichiometric
Regulation (derived from) AQSIQ Announcement No. 114, 2013
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to: electrode method and spectrophotometry automatic monitor on -line ammonia initial verification, testing and use of the follow-up examination.

BASIC DATA
Standard ID JJG 631-2004 (JJG631-2004)
Description (Translated English) Ammonia Analyzers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17
Word Count Estimation 13,161
Date of Issue 2004-03-02
Date of Implementation 2004-09-02
Older Standard (superseded by this standard) JJG 631-1989
Drafting Organization Shanghai Measurement and Testing Technology
Administrative Organization National Environmental stoichiometric Technical Committee
Regulation (derived from) Administration of Quality Supervision, Inspection and Quarantine No. 24 of 2004
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to automatic monitor ammonia (ammonia electrode method) of the initial verification, testing and use of follow-up inspection.

BASIC DATA
Standard ID JJG 631-1989 (JJG631-1989)
Description (Translated English) Verification Regulation for Ammonia Automatic Monitor
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Word Count Estimation 7,734
Date of Issue 1989/9/11
Date of Implementation 1990/10/1
Regulation (derived from) The State Administration of Quality Supervision, Inspection and Quarantine Notice 2004 No. 24


JJG 631-2013 JJG National Metrological Verification Regulations of the People’s Republic of China Ammonia-Nitrogen Automatic Analyzers ISSUED ON. AUGUST 15, 2013 IMPLEMENTED ON. FEBRUARY 15, 2013 Issued by. General Administration of Quality Supervision, Inspection and Quarantine Verification Regulation of Ammonia-Nitrogen Automatic Analyzers Replacing JJG 631-2004 Administrative organization. National Environment Chemistry Metrology Technical Committee Main Drafting organizations. Shanghai Metrology and Testing Institute Jiangsu Province Metrology Institute Shanghai Electronics Scientific Instrument Co., Ltd. National Environment Chemistry Metrology Technical Committee is entrusted to be responsible for the explanation of this Regulation. Main drafters of this Regulation. Ding Min (Shanghai Metrology and Testing Institute) Gong Feiyan (Shanghai Metrology and Testing Institute) Xie Luyun (Shanghai Metrology and Testing Institute) Participating drafters of this Regulation. Cai Yeqiang (Jiangsu Province Metrology Institute) Xing Jinjing (Jiangsu Province Metrology Institute) Wang Qiaomei (Shanghai Electronics Scientific Instrument Co., Ltd.) Table of Contents Introduction ... 5 1 Scope ... 6 2 Overview ... 6 3 Measuring performance requirements ... 6 4 General technical requirements ... 7 5 Measuring instrument control ... 8 6 Processing of verification results ... 12 7 Verification cycle-time ... 12 Appendix A ... 13 Appendix B ... 14 Appendix C ... 17 Introduction This regulation is the revision to JJG 631-2004 "Ammonia automatic analyzers”. Compared with JJG 631-2004, in addition to editorial changes, the main technical changes are as follows. - Change the regulation’s name to "Ammonia-nitrogen automatic analyzers"; - The scope is extended from "applicable to ammonia automatic analyzers (gas sensing electrode method)" to "applicable to online ammonia-nitrogen automatic analyzers that is based on electrode method and Spectrophotometry (see Article 1); - Modify the instrument’s classification (see Article 3); - Modify indicated value error’s performance requirements (see Table 1); - Modify metrology device’s control requirements. Delete the requirements to new ex-factory instruments that all requirements must be verified according to Class A and Class B instruments (see Article 5); - Modify the list of verification items in metrology device control. Add item “response time” in “Use inspection” for electrode instrument (see Table 2); - Modify the standard substances’ concentrations which are used for verification of instrument’s indicated value error, stability, repeatability, and response time (see Articles 5.3.2, 5.3.3, 5.3.4, 5.3.5); - Modify the test result processing. Verification certificate is required to provide the qualified category (see Article 6). The historical version of JJG 631-2004 "Ammonia automatic analyzers" is. - JJG 631-1989 "Ammonia automatic analyzers". Ammonia-Nitrogen Automatic Analyzers 1 Scope This regulation applies to initial verification, subsequent verification, and use inspection of online ammonia-nitrogen automatic analyzers which is based on electrode method and spectrophotometry. 2 Overview Ammonia-nitrogen automatic analyzers can automatically and continuously monitor the ammonia-nitrogen concentration in water bodies such as groundwater, surface water, sewage, and industrial waste. Measurement methods of ammonia-nitrogen automatic analyzers (hereinafter referred to as the instrument) can be divided in electrode method and spectrophotometry. Spectrophotometry includes salicylic acid spectrophotometry and Nessler reagent spectrophotometry etc. Its principle is. after ammonia or ammonium ions in water reacts with the indicator reagent, it shows in color. At specific wavelength, the absorbance of the solution is proportional to the ammonia-nitrogen content, so as to achieve the quantitative analysis of ammonia-nitrogen in water sample. Electrode method includes gas- sensitive electrode method and ammonia ion selection method. Through measuring the electrode potential, the instrument obtains the ammonia- nitrogen content in the water sample. 3 Measuring performance requirements According the different use occasions of ammonia-nitrogen automatic analyzers, the instrument is divided into Class A and Class B. Class A instrument is used in occasion of low concentrations. Class B instrument is used in occasion of high concentrations. For those occasions using both classes, the instrument must meet all requirements of Class A and Class B. Measuring instrument’s performance requirements are shown in Table 1. 5.3.4 Stability In accordance with the instrument specifications and requirements, perform preheating stability and calibration to the instrument. For Class A instrument, use the ammonia-nitrogen standard solution with concentration of 2.0 mg/L to measure. For Class B instrument, use the ammonia-nitrogen standard solution with concentration of 25 mg/L to measure. Measure 1 time for each 0.5 h. Continuously measure for 4 h. According to formula (6), calculate the relative change amplitude of initial value for each measured value. Take the maximum absolute value as the verification result of instrument stability. Where. M - instrument stability, %; Ci – Instrument’s i-th measured value, mg/L; c0 - initial measured value, mg/L. 5.3.5 Response time The system is firstly cleaned with ammonia-free water. For Class A instrument, use the ammonia-nitrogen standard solution with concentration of 2.0 mg/L to measure. For Class B instrument, use the ammonia-nitrogen standard solution with concentration of 25 mg/L to measure. When the test solution enters into the instrument detection tank, it is as the starting point. Record the time when the instrument’s indicated value reaches the 90% of stable indicated value. Repeatedly measure for 3 times. Take the average value as the verification result of response time. 5.3.6 Safety performance 5.3.6.1 Insulation resistance Power plug is not connected to the grid. The power switch is at ON position. Use insulation resistance meter to apply 500 V d.c. test voltage between the power inlet-line and chassis. After it is stable for 5 s, measure the insulation resistance. 5.3.6.2 Insulation strength Power plug is not connected to the grid. The power switch is at ON position. Use voltage-withstand tester to respectively apply test voltage between the power inlet line and chassis. The test voltage is gradually increased to 1.5 kV, current-limit of 5 mA. Maintain for 1 min. Observe if there is arcing and C.2 Conclusion pages of verification certificate Certificate Number xxxxxx - xxxx Verification Result Tested items and verification result. Instrument category. Class A Class B S/N Verification item Verification result 1 Appearance 2 Indicated value error /(% or mg/L) 3 Repeatability /% 4 Stability /% 5 Response time/min 6 Insulation resistance/MΩ 7 Insulation strength 8 Leakage Current/mA (Blank) C.3 Conclusion pages of verification certificate Certificate Number xxxxxx - xxxx Verification Result Tested items and verification result. Instrument category. Class A Class B S/N Verification item Verification result 1 Appearance 2 Indicated value error /(% or mg/L) 3 Repeatability /% 4 Stability /% 5 Response time/min 6 Insulation resistance/MΩ 7 Insulation strength 8 Leakage Current/mA Unqualified item of verification result. (Blank) ......


JJG 631-2004 Ammonia Analyzers National Metrology Verification Regulations of the People's Republic Ammonia automatic monitor Released on.2004-03-02 2004-09-02 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Ammonia automatic monitor verification procedures AmmoniaAnaly Zers Replace JJG 631-1989 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 02,.2004, and Implemented on September 2,.2004. Focal Point. National Environmental Chemometrics Technical Committee Main drafting unit. Shanghai Institute of Metrology and Testing Technology Participated in drafting unit. Shanghai Lei Magnetic Instrument Factory This procedure entrusts the National Environmental Chemometrics Technical Committee to explain The main drafters of this procedure. Gong Feiyan (Shanghai Institute of Metrology and Testing Technology) Participate in the drafters. Xie Luyun (Shanghai Institute of Metrology and Testing Technology) Wang Qiaomei (Shanghai Lei Magnetic Instrument Factory) table of Contents 1 range (1) 2 Overview (1) 3 Metrological performance requirements (1) 3.1 Indication error limit (1) 3.2 Repeatability (1) 3.3 Stability (1) 3.4 Response time (1) 4 General technical requirements (1) 4.1 Appearance (1) 4.2 Safety requirements (1) 5 measuring instrument control (2) 5.1 Verification conditions (2) 5.2 Verification project (2) 5.3 Verification method (3) 5.4 Processing of verification results (4) 5.5 Verification cycle (4) Appendix A Preparation of Ammonia Nitrogen Standard Solution (5) Appendix B Ammonia Automatic Monitor Calibration Record (6) Appendix C Verification Certificate (inside page) format (7) Appendix D Verification Result Notice (inside page) format (8) Ammonia automatic monitor verification procedures 1 Scope This procedure is applicable to the first verification, subsequent verification and use of the ammonia automatic monitor (ammonia gas sensitive electrode method). Test. 2 Overview The ammonia automatic monitor (hereinafter referred to as the instrument) can automatically and continuously monitor the ammonia nitrogen in the water such as surface water and discharge water. degree. Ammonia gas sensitive electrode is a composite electrode composed of a monopolar working electrode, a reference electrode and a gas permeable membrane, and the electromotive force generated by the same It varies with the activity of ammonia in the solution, which is indicated by concentration. The instrument can be represented by block diagram 1. 3 Metrological performance requirements 3.1 indication error limit. ±10% 3.2 Repeatability. the relative standard deviation is not more than 3% 3.3 Stability. ≤10% 4h 3.4 Response time. ≤6min 4 General technical requirements 4.1 Appearance 4.1.1 All fasteners of the instrument and accessories should be fastened; the connecting parts should be well connected; the moving parts should be moving. Live and stable; all kinds of pipeline interfaces inside and outside the instrument must be reliably sealed to avoid leakage. The panel display is clear, complete, and micro When the machine inputs an instruction, each corresponding function should be normal. 4.1.2 The instrument shall be marked with the name, model number, factory number, date of manufacture, name of the manufacturer, manufacturing measuring instrument The mark and number can be certified with instructions. All plating surfaces of newly manufactured instruments should not have peeling phenomenon, painting table The surface color should be uniform, and there should be no obvious scratches, exposed bottoms, cracks, blistering and rusting. Neat, no rough unevenness. The instrument in use should not have any damage that would affect its normal operation. 4.2 Safety requirements ......

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