Real time state standard monitoring (CBM) based ultrasonic instrument (USM) Accuracy performance detection and notification

摘要

The system (100) includes a control system (138) and a field device (200). The control system is configured to exchange data with the field devices. The field device determines 505 baseline calibration and characteristic curves for the process fluid flowing through the field device. The field device monitors the inline condition of the process fluid (525). The field device determines (530) whether deviations in the measurement accuracy for the fluid profile have been detected according to the inline evaluation criteria. The field device calculates 560 the flow rate of the process fluid using the latest valid characteristic curve.