Patent ID: 6990414

Claim:
An electronic gas flow measurement device for use with a turbine meter mounted in a gas pipeline, said device comprising: (a) a housing; (b) a computer having a microprocessor and a read-only memory (ROM); (c) data input means, for entering data in the ROM; (d) data output means, for retrieving data stored in the ROM; (e) turbine pulse counting means, for counting pulses of the turbine in the turbine meter; (f) means for receiving gas temperature inputs; and (g) means for receiving gas pressure inputs from upstream of the turbine meter; wherein: (h) the data input means may be used to store, in the ROM: h.1 look-up tables of intermediate values for selected gas flow calculation parameters determined in accordance with one or more selected calculation methods for selected ranges of gas temperature, density, and pressure; and h.2 look-up tables of “K” values for the turbine, corresponding to a selected range of gas flow rates; and (i) the device is programmed with software for: i.1 selecting intermediate values from the look-up tables corresponding to gas temperature and pressure inputs; i.2 selecting turbine “K” factors from the look-up tables corresponding to turbine pulse count inputs; and i.3 processing the selected intermediate values and “K” factors to calculate gas flow rates adjusted for temperature, pressure, and density, in accordance with one or more selected gas flow rate calculation methods.