FIELD: flow metering.
SUBSTANCE: solution relates to the method and system for adjusting the flow variable. A method for correcting a flow variable (509) based on an internal pressure inside a Coriolis flowmeter (202), the method comprising the steps of: receiving a first external pressure (503) measured by a first pressure sensor (204) located in the first process pipeline (208a) placed at the first end (212a) of the Coriolis flowmeter (202); determining the second external pressure (505) in the second process pipeline (208b) located at the second end (212b) opposite the first end (212a) of the Coriolis flowmeter (202); determining an estimated internal pressure (507) of the flowmeter based on the first external pressure (503) and the second external pressure (505); a flow variable (509) is received and an adjusted flow variable (512) is generated based on the pressure compensation factor (510) compared to the calculated internal pressure (507) of the flowmeter and the flow variable (509).
EFFECT: improved correction of the flow variable for pressure.
21 cl, 5 dwg
