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JJG 1138-2017: Non-dispersive Infrared Methane Transmitters for Coal Mine
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 1138-2017 | English | 419 |
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Non-dispersive Infrared Methane Transmitters for Coal Mine
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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---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.
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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