(1.200~1.300)g/cm3密度计测得值不确定度评定

Uncertainty of Measuring Resultsof(1.200~1.300)g/cm3 Densitometer

密度计作为测量液体密度的常用仪器,广泛应用于石油化工、食品工业、医药卫生等行业,其计量准确性至关重要。根据JJG42-2011《工作玻璃浮计检定规程》,存在较多影响密度计校准准确性的因素,本文以规格为(1.200~1.300)g/cm3的密度计为例评定测得值的不确定度。

As a common instrument for measuringliquid density,densitometer is widely used in many industries,such as petrochemical industry,food industry,medicine and health.Its measuring accuracy is very important.According to the verification regulation of JJG 42-2011,there are many factors affecting the accuracy of the calibration of the densitometer.In this paper,the uncertainty of the measuring results is evaluated by taking the densitometer with the specification of(1.200〜1.300)g/cm3asanexample.