Patent ID: 11920971
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method, comprising:
providing a static gas flowmeter installed to sense a flow of a gas in a pipe section of a gas pipeline, the gas flowmeter including an outer housing that includes an inlet, an outlet, a flow tube coupled to the outlet or the inlet, and at least one flow sensor positioned for sensing the gas flowing through the flow tube, a controller including an associated memory communicatively coupled to the sensor for receiving a sensing signal from the sensor, and for controlling operation of the sensor;
wherein at least one of i) the gas flowmeter further comprises an integrated gas valve connected to the inlet or to the outlet, and ii) an external valve positioned outside the housing coupled to the inlet that provides at least two state operation;
creating a zero-flow condition using at least one of closing or bypassing the integrated gas valve or manually closing the external valve;
during the zero-flow condition measuring a measured gas flow;
determining a flow offset correction factor, from the measured gas flow, and
determining that the flow offset correction factor is different than a predetermined limit, and then calibrating in-line, using flow calibration hardware or software, by adding the flow offset correction factor to the flow measurement algorithm.