Požadavky legální metrologie na ultrazvukové plynoměry

摘要

Roland Schmidt, Rainer Kramer: Legal Metrology Requirements for Ultrasonic Gas Meters For commercial naturaf gastransactions, the systém of legal metrology provides a high degree of accuracy and reliability. The issue of a type examinatien certif icate for ultrasonic gas meters requires successful accuráey, environmental, software and hardware tests. As an example, sorrie testihg prócedures for one type are presented in the article. These are the perturbation tests, software tests and a temperature test.