ISO 18213-2:2007介绍了将一组校准数据标准化为一组固定参考条件的程序，以尽量减少测量过程中环境条件变化的影响。本文介绍的程序通常适用于为校准储罐（即校准储罐测量系统）而获得的液体高度和体积测量。当与ISO 18213的其他部分结合使用时，这些程序特别适用于配备有测量液体含量的气泡探头系统的储罐。 ISO 18213-2:2007中提出的标准化算法可以在仅对环境条件（如温度）进行估计时有效应用。 然而，当在一组校准数据中测量每次体积和液体高度测量的相关环境条件时，可获得最可靠的结果。

ISO 18213-2:2007 presents procedures for standardizing a set of calibration data to a fixed set of reference conditions so as to minimize the effect of variations in ambient conditions that occur during the measurement process. The procedures presented herein apply generally to measurements of liquid height and volume obtained for the purpose of calibrating a tank (i.e., calibrating a tank's measurement system). When used in connection with other parts of ISO 18213, these procedures apply specifically to tanks equipped with bubbler probe systems for measuring liquid content. The standardization algorithms presented in ISO 18213-2:2007 can be profitably applied when only estimates of ambient conditions, such as temperature, are available. However, the most reliable results are obtained when relevant ambient conditions are measured for each measurement of volume and liquid height in a set of calibration data.