| With the development of science and technology, the demand to measuring is more and more strict. Measuring is charged of measurement system. The result of measuring is due to the quality of measurement system. This article is about measurement system and it's uncertainty.The paper studies the measurement system and uncertainty. Based on the analysis of system and the source of error, the paper does the uncertainty evaluation and accuracy undertaking. Evaluating the system, the traditional method is limning it's five accuracy index. This has been out of date and can't fulfill the demands. So, this paper converses the traditional method to modern uncertainty evaluation. From this, we can evaluate the measurement system scientifically, reasonably and objectively. Also the paper assays the error-sources of measurement system. By this, we can also evaluate the system and undertake the accuracy.The examples have proved that the two methods are both workable. When evaluating the system, they are both well. |
