Study on the Long-term Stability of the Calibration Device of Alcohol Content Detector
The verification device of exhaled gas alcohol content detector is mainly used in the measurement source of alcohol detector.As a standard gas,the source is directly transferred to the next level of measuring instruments,and stability is very important,and the JJG 657-2019 verification regulation stipulates the short-term stability of 8h.Since it is impossible to obtain stability data through the whole machine traceability,this paper conducts 3 years of use observation on the occurrence source of about 5000 units per year,and analyzes the traceability data.The ex-perimental results show that the stability of each parameter meets the requirements of use,and the stability data does not exceed the prescribed limit value,which can provide a reference for the long-term stability assessment and daily use of the measurement standard.
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