Portable infrared gas analyzer with automatic range calibration and calibration method

Abstract

The invention provides a portable infrared gas analyzer with automatic range calibration, comprising a pretreatment unit, an analysis unit, a master monitoring unit, a standardization unit and a correction unit. The analysis unit comprises a light source, an absorbing gas chamber and a receiving gas chamber, the light source generates infrared light and the infrared light irradiates the interior of the absorbing gas chamber, the standardization unit performs zero correction and range standardization and transmits standardized gas into the receiving gas chamber, and the correction unit automatically corrects a sample gas concentration measurement adapter pipe by calculating offset increment caused by actual environment variation. The portable infrared gas analyzer can automatically correct measurement results, not only overcomes the influence of measurement environments on measurement and ensures system measurement precision, but also can analyze gas for long time without an extra pretreatment unit, has a cost-saving effect and is convenient to carry.

Description

Technical field [0001] The invention relates to the field of measurement and control, in particular to a portable infrared gas analyzer with automatic range calibration and a calibration method. Background technique [0002] The gas analyzer is a process analyzer for measuring gas composition. In many production processes, especially in the production process where there are chemical reactions, automatic control based on physical parameters such as temperature, pressure, and flow is often not enough. Due to the wide variety of analyzed gases and the variety of analysis principles, there are many types of gas analyzers. Commonly used gas analysis methods mainly include infrared absorption method, ultraviolet absorption method and Fourier infrared method. [0003] The Fourier infrared method measuring instrument belongs to the high temperature measurement principle and requires actual heat preservation treatment and an external auxiliary calculation device. Therefore, it is large i...

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Problems solved by technology

[0006] In view of this, the present invention provides a portable infrared gas analyzer with automatic range calibration and a calibration method, which is used to solve the problem of the current portable analytical instruments using the principle of electrochemical analysis, which have low accuracy and resolution and high cost of use. , not easy to carry

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