초록 ▼

A method and apparatus are disclosed for calculating gas flow through an orifice using the complete American Gas Association gas flow equation, for selecting specific values to be used in said calculation in accordance with the specific orifice used, and for selectively displaying operating and test

A method and apparatus are disclosed for calculating gas flow through an orifice using the complete American Gas Association gas flow equation, for selecting specific values to be used in said calculation in accordance with the specific orifice used, and for selectively displaying operating and test parameters.

대표청구항 ▼

Apparatus for measuring the flow of gas through a pipe comprising: means for monitoring at least the pressure of said gas and the differential pressure of said gas across an orifice of said pipe; digital electronic means for calculating a gas flow equation to determine the flow of gas through said p

Apparatus for measuring the flow of gas through a pipe comprising: means for monitoring at least the pressure of said gas and the differential pressure of said gas across an orifice of said pipe; digital electronic means for calculating a gas flow equation to determine the flow of gas through said pipe, said equation including terms for the flow of said gas, the differential pressure and at least one constant term that varies with the particular orifice used in said pipe, means for applying to said digitial calculating means signals representative of at least the pressure of said gas and the differential pressure; means for storing a plurality of values used in determining said constant term, each value corresponding to a different orifice; and means for selecting which of said values is to be used in calculating the gas flow equation in accordance with which one of a plurality of orifices is used in said pipe and for applying said value to the electronic calculating means.