用衡量法检定单标线吸量管的不确定度评定

The Uncertainty Assessment of Single Marking Pipette by Measurement Approach

根据衡量法检定15.00ml单标线吸量管的过程,建立相应的数学模型并对各个参数进行了不确定度来源分析。结果表明,检定结果的不确定性主要来源于重复性检定引起的不确定度及操作者视觉误差引入的不确定,而用天平称量纯水质量时引入的不确定度、温度计本身的测量允许误差引入的不确定度、水温与室温之差引入的不确定度对检定结果的不确定度贡献相对较小。

The process of 15.00ml single marking pipette was tested by measurement approach and corresponding mathematical model was established. The sources of uncertainty of each parameter were analyzed. The results showed that the uncertainty of the test results mainly came from repeatability test and the operator visual error. While the uncertainty caused by pure water quality, weighing scales, the allowed measurement error of thermometer, and the temperature difference between the water and room slightly affected the uncertainty of the test results.