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

Claim 9:
10. A static gas flowmeter, comprising:
an outer housing that includes an inlet, an outlet, a flow tube coupled to the outlet or to the inlet, an integrated gas valve connected to the inlet or to the outlet that provides at least two state operation and at least one sensor positioned for sensing a gas flowing through the flow tube, a controller including an associated memory including a flow calibration algorithm and a flow measurement algorithm communicatively coupled to the sensor for receiving a sensing signal from the sensor, and for controlling operation of the sensor;
wherein the flowmeter is configured for being installed to sense a flow of a gas in a pipe section of a gas pipeline, and the flow calibration algorithm is configured for closing the integrated gas valve to create a zero-flow condition, wherein the controller provides a signal to the integrated gas valve to close for providing the zero-flow condition;
during the zero-flow condition, the flow measurement algorithm is configured for measuring a measured gas flow;
from the measured gas flow, the flow calibration algorithm:
determining a flow offset correction factor, and
if the flow offset correction factor is determined to be different than a predetermined limit, in-line calibrating by adding the flow offset correction factor to the flow measurement algorithm.