Modern production process, from raw material inspection, production process control to final product quality inspection and evaluation, is inseparable from various instruments and meters. In order to ensure high-quality production, it is necessary to regularly use various standard gases to verify or calibrate its instruments and meters, especially after long-term use and repair of online instruments and meters, it is more necessary to use standard gases to calibrate the scale. Various calibration standard gases are as follows:
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Component name
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Content
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Purpose
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Methane in air
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10×10-6, 1%
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Gas chromatograph
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Methane in hydrogen
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1%
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Methane in nitrogen
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100×10-6, 1%
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Carbon dioxide, propane
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10×10-6, 1%
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Carbon monoxide in nitrogen |
carbon monoxide
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0.5%~5%
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Automobile emission analyzer
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carbon dioxide
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0~14%
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propane
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800×10-6~1.2%
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Sulfur hexafluoride in nitrogen
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0~6000×10-6
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Sulfur hexafluoride leak detector, sulfur hexafluoride analyzer | |
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Nitric oxide in nitrogen
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0~1000×10-6
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Automobile emission analyzer, chemiluminescence nitrogen oxide analyzer |
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Oxygen in nitrogen
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10×10-6~21%
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Oxygen analyzer
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|
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Hydrogen sulfide in nitrogen
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0~20%
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Hydrogen sulfide gas analyzer
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Isobutane in air
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0~1.2%
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Combustible gas measuring and reporting instrument
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|
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Carbon monoxide in nitrogen
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0~10%
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Carbon monoxide analyzer and flue gas analyzer
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|
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Carbon dioxide in nitrogen
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0~50%
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Carbon dioxide analyzer, flue gas analyzer
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|
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Carbon dioxide in nitrogen
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0~20%
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Carbon dioxide gas alarm and flue gas analyzer
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Methane in air
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0~10%
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Optical interference or methanometer, catalytic combustion methanometer
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|
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Hydrogen in nitrogen
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0~50%
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Hydrogen analyzer
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Ammonia in nitrogen
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0~30%
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Ammonia analyzer
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Alcohol in air
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0~100×10-6
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Alcohol alarm
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Function of standard gas
(1) Establish the traceability of measurement. The gas reference materials have good homogeneity and stability, can preserve the chemical composition and characteristic values of the materials, and transfer their values in different spaces and times. Therefore, the traceability of measurement can be obtained by using standard gas for various actual measurement results.
(2) Promote the development of measurement technology and quality supervision. Standard gas plays an important role in ensuring the consistency of product quality and inspection results, and ensuring the scientificity, authority and impartiality of technical supervision. The type identification of new instruments, metrological certification of quality inspection institutions, laboratory accreditation, and the formulation, verification and implementation of national and industrial gas product standards are inseparable from standard gases.
(3) Transfer the quantity value. The standard gas is a means to transfer the quantity value and achieve consistent measurement results. The values of the basic units of the International System of Units are transferred to the actual measurement through standard gases of different grades in order to ensure the accuracy of the measurement results.
(4) Ensure the most accurate and consistent test results. The standard gas can be used to calibrate or verify the quality of the measurement process and various measurements, so as to ensure the consistency of measurement results in different time and space.
丙烷
Post time: Oct-13-2022