General standard for special gas detector for gas communication

  General standard for special gas detector for gas communication
Subject content and scope of application of gas communication this standard specifies the terms, classification, technical requirements, test methods, inspection rules and marks of gas detection and alarm instruments for working environment
This standard is applicable to combustible gases (including methane) in the working environment Gas and oxygen detector

2 reference standard gb2421 basic environmental test procedures for electrical and electronic products general GB3836 1  GB3836
General requirements for explosion-proof electrical equipment for hazardous environment 2  Explosion proof electrical equipment for sexual environment & ldquo; d” GB3836
4  Explosion proof electrical equipment for sexual environment intrinsically safe circuits and electrical equipment & ldquo; i GB4798
10 introduction to application environmental conditions of electrical and electronic products gb4857 5 basic test of transport packages vertical impact drop test conditions gb5274 preparation of gas mixture for gas analysis and calibration weighing method gb5275 preparation of gas mixture for gas analysis and calibration penetration method
3 terminology
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1 the detector is composed of sampling device, sensor and preamplifier circuit

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2 the sensor is a component that converts the concentration of the sample gas into a measurement signal
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3 the indicator is a component that indicates the measurement result of gas concentration

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4 buzzer indicator is commonly used for the parts that send alarm signals when the gas concentration of the alarm reaches or exceeds the alarm set value

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5 detection range the alarm can detect the concentration range of the measured gas under the test conditions

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6 detection error under this test condition, when the alarm instrument is corrected with standard gas, the maximum allowable error between the indication street and the standard value

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7 exposure error under the test conditions, when reporting and signing the calibration of instrument moistening standard gas, the alarm indication value shall be the maximum false cover allowed by our alarm set value

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8 alarm setting value the alarm concentration value preset by the alarm instrument according to relevant laws or standards or site conditions

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9 repeatability under the same conditions, the same alarm instrument shall repeatedly set the same test object in a short time, and the coincidence process between standby indicators shall be consistent

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10 stability under the condition of sincere inspection, the degree before the performance change of the alarm after it maintains a certain operating state

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