摘要 利用国家标准物质对生乳冰点仪的示值误差进行了检测,通过建立数学模型,对示值误差测量结果不确定度进行了评定。包括测量重复性、标准物质、仪器分辨力引入的不确定度。当测量点为标称值-400、-408、-450、-500、-512、-520、-557、-600 m ℃时,扩展不确定度分别为0.8,1.0,1.0 ,0.9,1.0,1.0,1.0,1.1 m ℃(k=2)。
Abstract:The indication error of raw milk freezing point testers was detected by using national standard reference materials. The uncertainty of indication error and measurement result is evaluated through the establishment of mathematical model, which is including the uncertainty introduced by measurement repeatability, reference materials and instrument resolution. When the measuring point: -400、-408、-450、-500、-512、-520、-557、-600 m ℃, the expanded uncertainty 0.8,1.0,1.0,0.9,1.0,1.0,1.0,1.1 m ℃(k=2).