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JJG 695-2019 English PDF (JJG695-2003, JJG695-1990)

JJG 695-2019_English: PDF (JJG695-2019)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 695-2019English329 Add to Cart 3 days [Need to translate] Sulfur Hydrogen Gas Detectors Valid JJG 695-2019
JJG 695-2003English170 Add to Cart 0--9 seconds. Auto-delivery Verification Regulation of Sulfur Hydrogen Gas Detectors Obsolete JJG 695-2003
JJG 695-1990English519 Add to Cart 4 days [Need to translate] Regulation of Verification for Hydrogen Sulfide Gas Analyzer Obsolete JJG 695-1990


BASIC DATA
Standard ID JJG 695-2019 (JJG695-2019)
Description (Translated English) Sulfur Hydrogen Gas Detectors
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 14,152
Date of Issue 2019
Date of Implementation 2020-03-27
Drafting Organization Shanghai Institute of Metrology and Testing Technology, China Institute of Testing Technology
Administrative Organization National Technical Committee on Environmental Stoichiometry
Issuing agency(ies) State Administration for Market Regulation

BASIC DATA
Standard ID JJG 695-2003 (JJG695-2003)
Description (Translated English) Verification Regulation of Sulfur Hydrogen Gas Detectors
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Word Count Estimation 14,195
Date of Issue 2003-09-23
Date of Implementation 2004-03-23
Older Standard (superseded by this standard) JJG 695-1990
Drafting Organization Shanghai Institute of Measurement and Testing
Administrative Organization National Technical Committee on Environment stoichiometric
Regulation (derived from) State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to hydrogen sulfide gas detector initial verification, testing and use of the follow-up inspection.

BASIC DATA
Standard ID JJG 695-1990 (JJG695-1990)
Description (Translated English) Regulation of Verification for Hydrogen Sulfide Gas Analyzer
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Word Count Estimation 13,197
Date of Issue 1990/7/4
Date of Implementation 1990/11/1
Regulation (derived from) The State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106


JJG 695-2019 Sulfur Hydrogen Gas Detectors National Measurement Verification Regulations of the People's Republic of China Hydrogen sulfide gas detector 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Hydrogen sulfide gas detector Verification regulations Replace JJG 695-2003 Focal point: National Technical Committee for Environmental Chemometrics Main drafting unit: Shanghai Institute of Metrology and Testing Technology China Testing Technology Research Institute Participated in the drafting unit: Gansu Metrology Research Institute Shanghai Ladi Technology Co:, Ltd: This regulation is entrusted to the National Environmental Chemometrics Technical Committee for interpretation The main drafters of this regulation: Chen Lan (Shanghai Institute of Metrology and Testing Technology) Qing Liu (China Institute of Testing Technology) Cai Jianhua (Shanghai Institute of Metrology and Testing Technology) Participating drafters: Shi Jianwei (Shanghai Institute of Metrology and Testing Technology) Wanli (China Institute of Testing Technology) Shi Liyu (Gansu Metrology Research Institute) Qi Jiaju (Shanghai Laidi Technology Co:, Ltd:) table of Contents Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 Measurement performance requirements (1) 4 General technical requirements (1) 4:1 Appearance and structure (1) 4:2 Marks and logos (1) 4:3 Power-on inspection (2) 4:4 Alarm function (2) 4:5 Insulation resistance (2) 5 Control of measuring instruments (2) 5:1 Verification conditions (2) 5:2 Verification items (2) 5:3 Verification method (3) 5:4 Processing of verification results (5) 5:5 Verification period (5) Appendix A Verification Record Format (6) Appendix B Format of the inner pages of the certificate of verification/certification result (8) introduction This regulation is a revision of JJG 695-2003: The revision of this regulation refers to GB 12358-2006 "Workplace The general technical requirements of the environmental gas detection and alarm instrument of the Institute ", GB/T 13971-2013" Technical Article of UV Gas Analyzer "", GB/T 25923-2010 "Online Gas Analyzer Technical Conditions" and other technical regulations: With JJG 695- Compared with:2003, the main technical changes except for editorial changes are as follows: --- Modified the scope of application (see 1): --- Modified the measurement performance requirements, respectively listed the measurement performance requirements of the analyzer and the detection alarm (see 3): --- Delete the alarm setting error verification item, and add the alarm function verification item to the instrument with alarm function (See 4:4): --- Modify the appearance item in the original regulations to "appearance and structure", "signs and logo", "power-on inspection", etc: Three items (see 4:1, 4:2, 4:3): --- Delete the insulation strength verification items, and delete the insulation strength tester and insulation strength verification method: --- The relative expansion uncertainty and inclusion factor of gas reference materials are determined by the original relative expansion uncertainty If it is greater than 2%, k = 3 is modified to a relative expansion uncertainty of not greater than 2%, k = 2: When using a gas dilution device, The relative expansion uncertainty of the standard gas after dilution shall meet the above requirements (see 5:1:2:1): --- Changed the format of the verification record, the verification certificate and the internal page format of the verification result notification (see Appendix A, Appendix B): The previous releases of this regulation are: --- JJG 695-2003; --- JJG 695-1990: Verification Regulation of Hydrogen Sulfide Gas Detector 1 Scope This regulation is applicable to the first verification, subsequent verification and in-use inspection of hydrogen sulfide gas detector: Hydrogen sulfide gas The detector includes a hydrogen sulfide gas detection alarm and a hydrogen sulfide gas analyzer: 2 Overview Hydrogen sulfide gas detector (hereinafter referred to as instrument) is mainly used to detect sulfide in the workplace environment and production process The concentration of hydrogen gas: For the instrument with alarm function, when the displayed value is greater than the alarm setting value, there should be sound, light or vibration Call the police: The instrument is mainly composed of gas circuit unit, detection unit, signal processing unit, alarm unit and display unit: The detection principle is mainly electrochemical method, spectroscopy, etc: According to the sampling method, it is divided into diffusion type, positive pressure conveying type and pump suction type: According to the usage mode, it is divided into portable and fixed: It can be divided into non-continuous measurement and continuity measurement according to working mode: 3 Measurement performance requirements See Table 1 for metering performance requirements: Table 1 Measurement performance requirements Project hydrogen sulfide gas analyzer hydrogen sulfide gas detection alarm Indication error ± 10% ± 2μmol/mol or ± 10% (Just one of them) Response time ≤90s ≤60s Repeatability ≤1:5% ≤2% drift Zero drift ± 2% FS Range drift ± 3% FS Note: FS indicates the full scale of the instrument: 4 General technical requirements 4:1 Appearance and structure 4:1:1 The instrument should not have any appearance damage that would affect its normal operation: The surface of the newly manufactured instrument should be smooth, flat and painted The coating is uniform without peeling and rusting: 4:1:2 The adjustment parts shall be able to operate normally, and the fasteners shall be free from looseness: 4:2 Marks and logos The instrument name, model, number, name of the manufacturer, date of manufacture, measurement range, maximum allowable error, etc: ......


JJG 695-2003 NATIONAL METROLOGY & CALIBRATION REGULATION OF THE PEOPLE’S REPUBLIC OF CHINA Replacing JJG 695-1990 Sulfur hydrogen gas detectors ISSUED ON: SEPTEMBER 23, 2003 IMPLEMENTED ON: MARCH 23, 2004 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC Table of Contents 1 Scope ... 4  2 Overview ... 4  3 Metrological performance requirements ... 4  3.1 Indication error ... 4  3.2 Repeatability ... 4  3.3 Response time ... 4  3.4 Drift ... 5  3.5 Alarm setting error ... 5  4 General technical requirements ... 5  4.1 Appearance ... 5  4.2 Insulation resistance ... 6  4.3 Dielectric strength ... 6  5 Control of measuring instrument ... 6  5.1 Verification conditions ... 6  5.2 Verification items ... 7  5.3 Verification method ... 7  5.4 Processing of verification result ... 10  5.5 Verification period ... 11  Appendix A Verification record format of hydrogen sulfide gas detector ... 12  Appendix B Format of verification certificate (inner page) ... 14  Appendix C Format of verification result notice (inner page) ... 15  Verification regulation of sulfur hydrogen gas detectors 1 Scope This regulation applies to the first verification, subsequent verification and in- use inspection of hydrogen sulfide gas detectors. 2 Overview The hydrogen sulfide gas detector (hereinafter referred to as the instrument) mainly comprises an electrochemical sensor or an optical sensor, as well as an electronic component and a display portion. The sensor converts hydrogen sulfide gas in the environment into an electrical signal and displays it in a concentration (molar fraction). The instrument is divided into diffused type and pumped type. 3 Metrological performance requirements 3.1 Indication error The indication error of the instrument is as shown in Table 1. Table 1 Hydrogen sulfide gas detector Measuring range Limit of indication error Molar fraction X (H2S): ≤ 100 x 10-6 ± 5 x 10-6 Molar fraction X (H2S): > 100 x 10-6 ± 5%FS 3.2 Repeatability The relative standard deviation shall be not more than 2%. 3.3 Response time For diffused-type instrument, it is not more than 60 s; for pumped-type instrument, it is not more than 30 s. observe whether the instrument has alarm sound and whether the alarm light flashes, check the alarm set point of the instrument. 4.2 Insulation resistance For instruments which use 220V AC, the phase-to-ground insulation resistance of the power supply is not less than 40 MΩ. 4.3 Dielectric strength For instruments which use 220V AC, the insulation strength of the phase- connected line to ground of the power supply shall be able to withstand the AC voltage of 1500V, 50Hz, for a test duration of 1 min, without breakdown and arcing. 5 Control of measuring instrument Instrument control includes first verification, subsequent verification, in-use inspection. 5.1 Verification conditions 5.1.1 Environmental conditions for verification 5.1.1.1 Ambient temperature: 0 ~ 40 °C (fluctuation ≤ 5 °C) 5.1.1.2 Relative humidity: ≤ 85% 5.1.2 Equipment for verification 5.1.2.1 Gas reference material The hydrogen sulfide standard gas which has a concentration of 20%, 50%, 80% of the full scale and 1.5 times the alarm set point is used, which have an uncertainty of not more than 2% (k = 3). 5.1.2.2 Zero calibration gas High-purity nitrogen or clean air. 5.1.2.3 Flowmeter (0 ~ 1) L/min, the accuracy level is not less than level 4. for 1 min, the current is 5 mA. Then the voltage is smoothly lowered to 0 V. The instrument shall not have breakdown and arcing during the whole test. 5.3.4 Indication error After preheating and stabilization, the instrument uses the zero gas and a standard gas with a concentration of about 80% of the upper limit of the measurement range. After calibrating the zero point and the indication value of the instrument, within the measurement range, respectively lead in the standard gas which has a concentration of about 20% and 50%, respectively, of the upper limit of measurement range (if the instrument has two measuring ranges, it shall lead in at least one standard gas within the low measuring range). Record the actual reading after leading in the gas. Repeat the above procedures for 3 times. Use the formula (1) or (2) to calculate the indication error of each verification point: Where: - The average of the readings; As - Standard value; R - Measuring range. When the instrument's range is > 100 × 10-6, it is calculated by formula (1), take the Δe of the maximum absolute value as the indication error of the instrument. When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (2), take the Δe of the maximum absolute value as the indication error of the instrument. 5.3.5 Repeatability After the instrument is stabilized by preheating and its zero point calibrated by the zero point standard gas, lead in the standard gas which has a concentration of about 50% of the measuring range. After the reading is stable, record the measured value. Repeat the above measuring procedure for 6 times. Respectively record the reading Ai. The repeatability is indicated by the relative standard deviation Δc. Use the formula (3) to calculate the repeatability of the instrument: When the instrument's range is > 100 × 10-6, it is calculated by formula (4), take the Δzi of the maximum absolute value as the zero drift of the instrument. When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (5), take the Δzi of the maximum absolute value as the zero drift of the instrument. Calculate the indication drift according to formula (6) or (7): When the instrument's range is > 100 × 10-6, it is calculated by formula (6), take the Δsi of the maximum absolute value as the indication drift of the instrument. When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (7), take the Δsi of the maximum absolute value as the indication drift of the instrument. 5.3.8 Measurement of alarm error After the instrument is stabilized by preheating, use the zero point gas and the standard gas which has a concentration of about 80% of the upper limit of the measuring range, to calibrate the zero point and the indication value of the instrument. Then lead in the standard gas which has a concentration about 1.5 times the alarm set point (As). Record the actual alarm concentration (Ai) of the instrument. Remove the standard gas. Lead in the zero point gas to zero the instrument. Repeat the above procedures for 3 times. Use the formula (8) to calculate the alarm set error of the instrument: Take the ΔAi of the maximum absolute value as the alarm set error of the instrument. 5.4 Processing of verification result The instruments as verified and qualified according to the requirements of this regulation will be issued a verification certificate. The instrument failing to pass the verification will be issued a verification result notice, on which the unqualified items are indicated. ......

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