ISO 18471:2015农业灌溉系统用过滤器过滤等级验证的试验方法。它用于验证过滤器制造商关于特定过滤器过滤等级的声明。 本试验方法使用堵塞容量计（CCM）装置将被测过滤器的过滤等级与测试滤网的过滤等级进行比较。 注:过滤器制造商也可使用该试验方法来确定过滤等级。

ISO 18471:2015 a test method for the verification of filtration grade of filters intended for operation in agricultural irrigation systems. It is intended to be used for verifying the filter manufacturer's declaration about the filtration grade of a specific filter. This test method uses a Clogging Capacity Meter (CCM) device to compare the filtration grade of the filter under test against the filtration grade of a test filtration screen. NOTE This test method may also be used by a filter manufacturer to determine the filtration grade.