| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of simply and accurately determining the deterioration state of a diaphragm in a diaphragm type gas meter and a method for inspecting the same.SOLUTION: An object to be inspected is a diaphragm type gas meter 100 provided with a temperature history display part I of which optical physical properties are changed by temperature history thereof in a measuring chamber 4. A method for inspecting the diaphragm type gas meter 100 includes: an actual use time acquisition step for acquiring an actual use time which is the actual use tine of a diaphragm 11; an actual temperature history acquisition step for measuring optical physical properties of the temperature history display part I and acquiring the result of the measurement as an actual temperature history which is the actual temperature history of the diaphragm 11; and a determination step for determining the deterioration state of the diaphragm 11 from the actual use time and the actual temperature history. |
