浊度计测量结果不确定度分析

Uncertainty analysis of the relative indication error of turbidimeter

本文介绍了用于测量悬浮于水(或其他透明液体)中的不溶性颗粒物质含量的仪器浊度计的测量原理和计量单位,并依据计量检定规程(JJG880-1994)中检定示值相对误差的方法,对示值相对误差的测量结果进行不确定度评定,具体分析了各个不确定度分量的产生,并合成标准不确定度及有效自由度。评定示值相对误差测量结果的不确定度为U95rel=3.3%。

This paper introduces the principle and unit of measurement of turbidimeter, a kind of instrument used to measure the content of undissolved particulate matter suspending in water or other transparent liquid.In this article the measurement uncertainty of relative indication error in the method recommended in Verification Regulation of Turbidimeter(JJG880-1994) for turbidimeter is estimated.The sources of standard uncertainty component are analyzed in detail.The combined standard uncertainty and effective degree of freedom are calculated.The measurement uncertainty of turbidimeters relative indication error is estimated to be U_~95rel =3.3%.