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JJG 1138-2017 English PDF

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JJG 1138-2017: Non-dispersive Infrared Methane Transmitters for Coal Mine
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Standard similar to JJG 1138-2017

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Basic data

Standard ID JJG 1138-2017 (JJG1138-2017)
Description (Translated English) Non-dispersive Infrared Methane Transmitters for Coal Mine
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 18,180
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 non-dispersive infrared absorption spectrum of the principle of methane mine methane sensor (hereinafter referred to as the sensor) of the first test, follow-up inspection and use of inspection.

JJG 1138-2017: Non-dispersive Infrared Methane Transmitters for Coal Mine

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Non-dispersive Infrared Methane Transmitters for Coal Mine National Metrological Verification Regulation of the People's Republic of China Non - dispersive infrared methane sensor for coal mine 2017-02-28 released 2017-05-28 Implementation State Administration of Quality Supervision, Inspection and Quarantine issued Non - dispersive infrared for coal mines Methane sensor verification procedures Responsible unit. National Environmental Chemical Metrology Technical Committee The main drafting unit. National Mine Safety Metering Station Huainan Quality and Technical Supervision Bureau China Coal Industry Group Chongqing Research Institute Co., Ltd. Participated in the drafting unit. National Coal Mine dust and ventilation safety product quality supervision and inspection center Huainan City Measurement and Testing Institute This procedure entrusts the National Environmental Chemistry Metrology Technical Committee to explain The main drafters of this procedure. Cao Libo (National Mine Safety Metering Station) Xia Defen (Huainan City Quality and Technical Supervision) Zhu Zhengxian (China Coal Science and Technology Group Chongqing Research Institute Co., Ltd.) Participate in the drafters. Zhang Anran (National Coal Mine dust and ventilation safety product quality supervision and inspection center) Wei Wenhui (National Mine Safety Metering Station) Sun Shiling (China Coal Science and Industry Group Chongqing Research Institute Co., Ltd.) Jia Yongkang (Huainan City Measurement and Testing Institute)

table of Contents

Introduction (II) 1 Scope (1) 2 Overview (1) 3 Measurement performance requirements (1) 3.1 indication error (1) 3.2 Repetitive (1) 3.3 Response time (1) 3.4 Drift (1) 3.5 signal transmission error (2) 4 General technical requirements (2) 4.1 Appearance and structure (2) 4.2 Logo and logo (2) 4.3 Power check (2) 4.4 alarm function and alarm action value check (2) 4.5 Insulation resistance (2) 5 Measuring instruments (2) 5.1 Test conditions (2) 5.2 Verification Project (3) 5.3 Verification method (4) 5.4 Processing of test results (7) 5.5 Verification cycle (7) Appendix A Simulation circuit technical requirements (8) Appendix B Non-dispersive infrared methane sensor for coal mines Metrological verification of original records (9) APPENDIX C INSPECTION CERTIFICATE/QUALIFICATION RESULTS Notice Page Format (11)

Introduction

This procedure is based on JJF1001-2011 "General Metrology Terms and Definitions", JJF1002-2010 "National And the JJF1059.1-2012 "Measurement Uncertainty Assessment and Representation" of. The main technical indicators of this procedure refer to AQ6211-2008 "non-dispersive infrared methane sensor for coal mine". This order is the first release. Test procedure for non - dispersive infrared methane sensor for coal mine

1 Scope

This procedure applies to the non-dispersive infrared spectrum absorption principle of the coal mine methane sensor (hereinafter referred to as the sensor) The first test, follow-up test and the use of inspection.

2 Overview

The sensor is used to continuously detect the concentration of methane gas in a coal mine operating environment or a gas drainage pipeline. The sensor is mainly composed of a detection unit (air chamber, infrared light source, infrared sensitive element, etc.), signal processing unit and display Display unit and other components, through the principle of infrared absorption of methane gas concentration into electrical signals, and then by the signal processing unit Processing, display methane concentration and long-distance transmission. The sensor sampling method is mainly diffusion type. Sensors according to the use and measurement range is generally divided into A, B, C three categories. Class A. for environmental monitoring, measuring range. mole fraction 0 ~ 10%; Class B. for environmental monitoring, measuring range. mole fraction 0 ~ 100%; Class C. for gas drainage pipe monitoring, measuring range. mole fraction 0 ~ 100%.

3 Measurement performance requirements

3.1 indication error The indication error of the sensor shall be in accordance with Table 1. Table 1 shows the indication error limits for the sensor Measuring range Maximum allowable error Class A Class B Class C 0 x≤1% 绝对误差.±0.06% 绝对误差.±0.06% 绝对误差.±0.07% 1% x≤10% 相对误差.±6% 相对误差.±6% 相对误差.±7% 10% x≤100% --- 相对误差.±6% 相对误差.±7% Note. x is the mole fraction of methane. 3.2 Repeatability Repeatability is not greater than 1%. 3.3 Response time A, B type of sensor response time is not greater than 25s; Class C sensor response time is not greater than 50s. 3.4 drift The drift of the sensor includes zero drift and range drift, which should be in accordance with Table 2.

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