不同级别pH计在测量时所引入的不确定度分量

The Uncertainty Component Caused by the Different Grade pH Meter in Measurement

一台已知级别的pH计测量溶液pH值时,在测量结果的不确定度评定过程中,可以把pH计的不确定度作为由于测量方法而引入的一个已知的不确定度分量;评定了pH计在检定或使用的临界条件下,0.2级、0.1级、0.01级和0.001级等不同级别的pH计可能达到的最大不确定度。

The pH meter is usually used to measure the pH values of solution. The grade of each pH meter can be thought as a known uncertainty component when evaluating the uncertainty of the results. The uncertainties of different grades, such as 0.2, 0.1, 0.01 and 0.001grade, are evaluated at their critical conditions, and they are the possible maximum uncertainties of different grade pH meters.