2) Other insertion type flow instruments (referring to insertion turbine flowmeter, electromagnetic flowmeter, DP flow meter, vortex flowmeter , etc.) all need to correct and compensate the velocity distribution coefficient A, blocking coefficient and interference coefficient. Ask the user whether they have corrected and compensated when using other plug in instruments, otherwise certain errors will occur. And the insertion ultrasonic flowmeter basically does not exist the above factors
3) Other insertion meters take the point velocity as the reference to obtain the surface velocity of the whole pipeline, so they have very strict requirements on the velocity distribution of the fluid in the pipeline. If the lack of straight pipe segments leads to the non-axisy-symmetric flow of the fluid in the pipeline, certain errors will occur in the measurement or large errors will occur due to flow distortion.
4) Understand the actual pipeline direction on site, including whether there are branch pipes and whether there are sufficient straight pipe segments in the installation position;
5) Understand the service life and actual pipe outer diameter, actual wall thickness, material and whether there is lining and scaling inside the pipe, etc.
Post time: Aug-22-2022