Evaluation of a Reuse Method for Gas Meter Components

Abstract

A pressure switch is a security component used in the intelligent gas meter. The pressure switches used by Osaka Gas are characterized by: (1) a 100% retrieval rate within ten years after installation of the gas meter, (2) an established retrieval procedure, and (3) a single model complying with identical specifications. Taking advantage of these features, the authors developed a reuse method for pressure switches. Specifically speaking, accelerated deterioration test conditions were established, a statistical procedure was developed for determining the reusability rate, and the criterion for evaluating reusability were clarified.