On site display of vortex flowmeter | pipeline flowmeter | Yunnan ultrasonic flowmeter manufacturer

『On site display of vortex flowmeter』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)

1. Common faults and troubleshooting methods of vortex flowmeter?

Vortex flowmeter is a flow measurement instrument without moving parts, which reflects the flow velocity by measuring the vortex frequency downstream of obstacles in the flow path, thus achieving the purpose of measuring flow. This flowmeter has the advantages of wide application range, high measurement accuracy, low wear, linear output signal and long-distance transmission, easy installation and maintenance. When the flowmeter displays abnormally, it is necessary to check whether the process condition meets the instrument requirements and whether the process flow falls within the range that the flowmeter can measure. If this requirement is not met, the flowmeter display will be abnormal. 2. The medium that the flowmeter can detect should be single-phase fluid. If there is a gas-liquid two-phase phenomenon in the medium, the flowmeter display will be abnormal. When there is a malfunction in the flowmeter, it is necessary to correctly distinguish whether the instrument is displaying or if other secondary instruments are malfunctioning. If the flowmeter has an output leakage but the display instrument does not display, this beam type fault should be on the display instrument. 4. Confirm that the fault is caused by the flow meter, and troubleshoot it according to the following table.

2. How to deal with the length of the straight pipe section of the vortex flowmeter not meeting the standard in industrial sites?

When the length of the upstream straight pipe section of the vortex flowmeter in the industrial field does not meet the requirements, the following two main measures can be taken:

Firstly, the principle of using the me

thod of correcting the basic error: when the upstream straight pipe section does not meet the specified requirements, it will cause the instrument coefficient to fluctuate with a deviation of K and additional errors in accuracy, and the error impact can be reduced through correction.

. For example, based on the requirements for the length of the straight pipe section of different forms of flow blocking components in the upstream of the vortex flowmeter, when the upstream straight pipe section does not meet the regulations, it will cause a deviation in the instrument coefficient K, and the deviation value can be estimated through relevant charts. For example, according to relevant regulations, if there is a 90 ° single bend upstream of the vortex flowmeter, the upstream straight pipe section should have a length of 30D. When the actual length of the straight pipe section on site is only 20D, it will cause a deviation in the instrument coefficient K. Estimation method: Referring to the relevant curve chart, draw a vertical line at the horizontal axis 20DN to intersect with the real curve. From this intersection point, draw a line parallel to the horizontal axis and intersect with the vertical axis. The intersection point indicates the maximum deviation value between the K coefficient and the reference K coefficient (obtained through laboratory calibration). For example, at 20DN, the maximum deviation value may be ± 0.6%. On the other hand, the intersection of the perpendicular line of the horizontal axis and the imaginary curve at 20DN, and the intersection of the parallel line of the horizontal axis and the vertical axis at this point, indicate that the accuracy of the instrument will exceed the reference accuracy (lab

On site display of vortex flowmeter | pipeline flowmeter

1. Common faults and troubleshooting methods of vortex flowmeter?

2. How to deal with the length of the straight pipe section of the vortex flowmeter not meeting the standard in industrial sites?

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