BS EN ISO 20486:2018规定了日常使用中用于调整泄漏检测器以确定泄漏率的泄漏校准。一种校准方法是与参考泄漏进行比较。这样，用于日常使用的泄漏可以追溯到一个主要标准。在其他校准方法中，直接测量或计算已知体积的蒸汽压值。比较程序最好适用于氦气泄漏，因为该试验气体可通过质谱检漏仪（MSLD）进行选择性测量（ISO 20484中给出了MSLD的定义）。交叉引用:ISO 20484JCGM 100:2008购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 20486:2018 specifies the calibration of those leaks that are used for the adjustment of leak detectors for the determination of leakage rate in everyday use. One type of calibration method is a comparison with a reference leak. In this way, the leaks used for routine use become traceable to a primary standard. In other calibration methods, the value of vapour pressure was measured directly or calculated over a known volume.The comparison procedures are preferably applicable to helium leaks, because this test gas can be selectively measured by a mass spectrometer leak detector (MSLD) (the definition of MSLD is given in ISO 20484).Cross References:ISO 20484JCGM 100:2008All current amendments available at time of purchase are included with the purchase of this document.