subject: Ultrasonic Gas Meter is the flow calibration and field applications [print this page] Ultrasonic Gas Meter is the flow calibration and field applications
(4) Ultrasonic Flowmeter the pre-test and calibration flow is between a system error, the seizure of the factory stem qualified to be the real test flow calibration, sometimes due to the installation of the error might exceed 0.3 percent. Such as the 4 S Ultrasonic Flowmeter its factory set at 0.9962 flow coefficient, the ideal line test to ensure accuracy of better than 0.5%, but in non-ideal conditions under the pipeline flow is calibrated set of parameters, the "ideal pipeline Conditions "2.0 MPa and 0.7 MPa pressure tests, the error is greater than AGA.NO.9 impact on the pipeline installation of not more than 0.3% of the requirements and should therefore be based on the scene working conditions for real flow calibration
