Evaluation of uncertainty for determination of C,Si,Mn,P and S in aseismic ribbed bar by QSN 750 direct reading spectrometer
LinChun-lai GuanJin-rong Guomiao Zhangying
(China national construction steel quality supervision and test centre ,Beijing 100088 , China)
Abstract Based on the standard JJF1059-1999,the sources of the uncertainty by QSN 750 direct reading spectrometer for determination of C,Si,Mn,P and S in aseismic ribbed bar are analyzed,and the uncertainty of C,Si,Mn,P and S is evaluated and expressed. The value of uncertainty components in measurement is calculated and combined.
Keywords direct reading spectrometer; aseismic ribbed bar; uncertainty