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『The measurement of vortex flowmeter is inaccurate』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Is it not accurate to use a vortex flowmeter without temperature compensation?
The actual measurement of the vortex flowmeter is only the flow rate, which is converted into a flow rate expression after knowing the diameter of the pipeline, the temperature and pressure of the medium.. When the pipeline diameter, medium temperature, and medium pressure are consistent with the design, the expressed flow rate is in line with the accuracy of the flowmeter. But if the diameter of the pipeline, the temperature of the medium, and the pressure of the medium change, this conversion becomes inaccurate and needs to be corrected. The most ideal correction method is to directly measure the temperature and pressure of the medium simultaneously (without changing the diameter of the pipeline), and then convert them with the flow rate. So, whether the vortex flow meter without temperature compensation is accurate depends on whether the medium temperature and pressure under the process conditions can be stably maintained within a certain range consistent with the design. Generally speaking, adding temperature and pressure compensation can improve the measurement accuracy of vortex flowmeters, but in most cases, it is acceptable not to add it. It depends on specific needs.
2. Reasons for large fluctuations in vortex flowmeters
As a brand manufacturer that frequently uses imported vortex flowmeters from the United States, KNKE is happy to answer your questions.
.1、 Parameter setting issue: Incorrect flow meter parameter settings may result in inaccurate instrument readings. Incorrect parameter settings can cause deviations in the calculation of the full frequency of the secondary instrument. If the
2、 Selection issue: In some cases with turbulence, due to changes in process conditions, the diameter selection or design selection of the vortex flowmeter may need to be adjusted. In actual selection, smaller pipe diameters should be chosen as much as possible to improve measurement accuracy. For example, a set of vortex pipeline equipment provides services to multiple devices, but due to some devices not being used simultaneously, the actual flow rate decreases. The original design selected a diameter that was too large, making it impossible to ensure accurate indication at low flow rates. When the traffic is high, the device can still be used, but if it needs to be renovated, it may face certain difficulties. The change in process conditions is temporary, and the accuracy of the indication can be improved by readjusting the parameters.
3、 Installation issue: Insufficient length of the straight pipe section in front of the sensor during installation can affect measurement accuracy. For example, the straight pipe section in front of the sensor is clearly insufficient. As FIC203 is mainly used for control rather than measurement, the current accuracy is acceptable, which is equivalent to downgraded use.
4、 The effect of accumulation on the u