空气质量.空气质量测量的时间平均值不确定性的测定

[中文适用范围]： 本国际标准提供了一种对在规定的平均时间内在指定地点获得的一组空气质量数据的时间平均值的不确定性进行量化的方法。 本方法适用于通过规定的测量系统连续或间歇监测获得的空气质量数据。 时间平均值的不确定度既取决于测量结果的不确定度，也取决于数据集不完整的时间覆盖造成的不确定度。 本国际标准仅适用于： a) 用于计算时间平均值的空气质量数据集代表了规定时间段内被测量的时间结构， b) 可获得有关测量结果不确定度的适当信息，c) 测量结果均在同一位置获得。 本国际标准实施了测量不确定度表达指南（GUM）的建议。 [外文原描述]： ISO 11222:2002 provides a method for the quantification of the uncertainty of a time average of a set of air quality data obtained at a specified location over a defined averaging time period. The method is applicable to air quality data obtained by continuous or intermittent monitoring by means of a specified measuring system. The uncertainty of the time average depends on both the uncertainty of the measurement results and the uncertainty due to incomplete time coverage of the data set. ISO 11222:2002 is only applicable if the set of air quality data used to calculate the time average is representative of the temporal structure of the measurand over the defined time period, appropriate information on the uncertainty of the measurement results is available, and the measurement results have all been obtained at the same location. ISO 11222:2002 implements recommendations of the Guide to the Expression of Uncertainty in Measurement (GUM).