JJG 658-2022 "Drying Method Moisture Analyzer" applies to equipment for the purpose of determining Moisture content, including initial verification (verification after repair is deemed to be the first verification), subsequent verification, and inspection in use. The standard cites a number of key documents, covering the requirements of equipment such as mechanical balance, weight, electronic balance, as well as chemical reagent standards and specifications and test methods for analytical laboratory water. The terminology section defines Moisture content and Moisture content readability, and clarifies the role and definition of the sample tray. Moisture Analyzer is suitable for measuring the Moisture content of samples with relatively stable physical and chemical forms to ensure the accuracy and Reliability of measurement results.