FZ/T 98021-2019 "Spinning & weaving product waterproof performance tester, hydrostatic method" standard specifies the terms, definitions, basic functions, parameters, requirements, test methods, inspection rules and marking, Encasement, transportation and storage requirements of the test instrument for measuring the water permeability performance of Spinning & weaving products by hydrostatic method. This standard is suitable for testing at a constant rate of water pressure rise to ensure the accuracy and comparability of the measurement results. This standard refers to a number of relevant documents, including Encasement storage and transportation marks, salt spray testing in environmental test methods for electrical and electronic products, testing and evaluation methods for waterproof performance of Spinning & weaving products, as well as electrical equipment safety requirements and general specifications for electronic measuring instruments, to support the correct use and safe operation of test instruments.