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    • 5. 发明公开
    • MOISTURE METER, STATE DIAGNOSIS METHOD FOR MOISTURE METER, AND PROGRAM
    • EP4092401A1
    • 2022-11-23
    • EP20913083.0
    • 2020-01-16
    • A&D Company, Limited
    • KANNO, MasahiroNAGANE, Yoshikazu
    • G01N5/04
    • There is provided a heat-drying moisture meter that can diagnose the state of the device in consideration of not only factors of a mass measurement unit itself but also factors other than the mass measurement unit itself with a simple configuration. A moisture meter (100) includes a mass measurement unit (2) configured to measure a mass of a specimen, a heating unit (3) configured to heat the specimen, a control arithmetic unit (5) configured to control the heating unit (3) to heat the specimen until a change in mass of the specimen becomes not more than a predetermined threshold and calculate a moisture content of the specimen from the change in the mass of the specimen before and after heating, and a storage unit (8). The control arithmetic unit (5) includes a standard substance measurement unit (52a) configured to execute a measurement of a moisture content a plurality of times by using, as the specimen, a standard substance for inspection having a predetermined theoretical moisture content with an arbitrary mass when being heated at a predetermined temperature, a standard deviation calculation unit (52c) configured to calculate a standard deviation of a measured moisture content in the measurement executed the plurality of times, and a state diagnosis unit (52d) configured to evaluate the presence/absence of an abnormality in the mass measurement unit (2) by comparing the measured moisture content with a theoretical moisture content of the standard substance stored in the storage unit and evaluate an influence of an installation environment by determining whether the standard deviation is not more than a predetermined value.