Study on Calibration Technology of Spectral Absorption Gas Analyzer
Spectral absorption gas analyzers can be applied in open places,while TDLAS gas analyzer has the advantages of being free from cross interference of dust,window,environmental parameters and background gas,fast response speed and high accuracy.In recent years,it has been widely used in the field monitoring of severe working conditions,but there is little research on online calibration and traceability technology.Based on the TDLAS absorption spectrum model,the measuring principle and classification of TDLAS analyzers are analyzed,and scheme of calibrating TDLAS gas analyzers with standard concentration chamber is proposed.This scheme provides a standard gas environment with uniform concentration,stable quantity and single background,and successfully calibrates the TDLAS analyzer.The calibration example shows that the method is feasible,and the measurement uncertainty is close to the uncertainty of the standard gas source,and the best measurement uncertainty is 1.1%.
spectral absorption gas analyzerTDLASopen optical pathconcentrationcalibrationstandard concentration chamber
万方数据
维普
