山西定襄地震台FH-463A与BHC-336定标器测氡仪系统观测数据对比

对山西定襄地震台2套FD-125氡钍分析器及其配套定标器分别为FH-463A与BHC-336的测氡仪系统,从定标器阈值设定、观测数据稳定性及数据一致性方面,开展定标器阈值设定对比试验和水氡测值同步对比观测.结果表明:FH-463A定标器测氡仪系统水氡数据标准误差更小,精度更高,稳定性更佳;BHC-336定标器阈值为0....

Comparison of observations by two radon measuring systems with FH-463A and BHC-336 calibrators at Dingxiang Seismic Station of Shanxi Province

For two sets of FD-125 radon thorium analyzer at Dingxiang Seismic Station of Shanxi Province, whose matching calibrators are FH-463A and BHC-336 respectively, this paper carried out a comparison test of scaler threshold setting and synchronous observation of water radon from the aspects of scaler threshold setting, observation data stability, and data consistency. The results show that the standard error of water radon observation by the radon measuring instrument with the FH-463A calibrator is smaller, the accuracy is higher, and the stability is better. The standard deviation and mean standard error of the primary and secondary samples observed by the radon measuring instrument with the BHC-336 calibrator are the smallest when the threshold is 0.7 V. The observation is more stable than other thresholds. The water radon observations have better synchronization and stability when the radon measuring instrument with the BHC-336 calibrator uses a 0.7 V threshold and the radon measuring instrument with the FH-463A calibrator uses a 2.0 V threshold. According to the discipline specification revised in 2014, it is determined that stable observation data can be obtained when the 0.7 V threshold value is selected for the BHC-336 calibrator.