Vortex flow meter error reasons

Abstract: The information on the error causes of the vortex flowmeter meter is provided by the excellent flowmeter and flowmeter production and quotation manufacturers. The main problems of the measurement deviation of the vortex flowmeter: 1: The problem of selection. Some vortex sensors choose a larger size due to the change of process conditions in the selection of the aperture or after the design and selection, and the actual selection should choose the smallest aperture as possible. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the error of the vortex flowmeter. The main problems of the measurement deviation of the vortex flowmeter: 1: The problem of selection. Some vortex sensors have a large selection due to changes in process conditions in caliber selection or after design selection.—In order to improve the measurement accuracy, the actual selection should choose the smallest diameter possible. The reasons for this are mainly related to problems 1, 3, and 6. For example, a vortex pipeline is designed to be used by several equipments. Due to the fact that some of the equipment in the process are sometimes not used, the current actual flow rate is reduced. The actual use causes the original design selection diameter to be too large, which is equivalent to increasing the measurable flow rate. The lower limit, the indication cannot be guaranteed when the flow rate of the process pipeline is small, and it can be used when the flow rate is large, because it is too difficult to remodel (sometimes, the change of process conditions is only temporary). Can be combined with parameter re-tuning to improve indication accuracy. 2: Installation problems. The main reason is that the length of the straight pipe section in front of the sensor is not enough, which affects the measurement accuracy. The reason for this is mainly related to problem 1. 3: The reason for the parameter setting direction. Due to wrong parameters, the instrument indication is wrong. The parameter error makes the calculation of the full-scale frequency of the secondary instrument wrong. The reasons for this are mainly related to problems 1 and 3. The similar full-scale frequency makes the indication inaccurate for a long time, and the actual full-scale frequency greatly affects the calculated full-scale frequency, which makes the indication fluctuate in a large range and cannot be read, and the inconsistency of the parameters on the data affects the final determination of the parameters, and finally passed Recalibration combined with mutual comparison to determine the parameters solves this problem. 4: Secondary instrument failure. There are many faults in this part, including: there is a disconnection on the circuit board of the instrument, the display of the individual digit of the range setting is broken, and the display of the individual digit of the K coefficient setting is broken, making it impossible to determine the range setting and K coefficient setting. Part of the reason is mainly related to problems 1 and 2. By fixing the corresponding failure, the problem is solved. 5: Four-way line connection problem. On the surface of some circuits, the circuit connection seems to be very good. After careful inspection, some connectors have actually been loose, causing the circuit to be interrupted. Although some connectors are tightly connected, the fastening screws are fastened to the wire sheath due to the problem of the auxiliary line, which also makes the circuit breaker. Interruption, this part of the reason is mainly related to problem 2. The corresponding line problems are solved, and the existing problems are also solved accordingly. 6: The connection problem between the secondary instrument and the subsequent instrument. Due to the problem of the follow-up instrument or the maintenance of the follow-up instrument, the mA output circuit of the secondary instrument is interrupted. For this type of secondary instrument, this part of the reason is mainly related to problem ②. Especially for the subsequent recorder, when the recorder is damaged for a long time and cannot be repaired, be sure to short-circuit the output of the secondary meter. 7: The circuit has no indication due to the fault of the flat shaft cable of the secondary instrument. Due to long-term operation and the influence of dust, the flat shaft cable is faulty, and the problem can be solved by cleaning or replacing the flat shaft wire. 8: For problem 7, the main reason is that the second instrument shows that the fixing screw of the head coil is loose, causing the head to sink, the friction between the pointer and the case is large, and the action does not work well. By adjusting the head and fixing it again, the problem is solved accordingly. 9: Use environmental issues. Especially for the sensor part installed in the ground well, the circuit board is damp due to the high ambient humidity. This part of the reason is mainly related to problem 2. Through the corresponding technical improvement measures, the probe part and the conversion part were re-processed for some sensors with high environmental humidity, and a separate sensor was used, so the working environment was improved, and this part of the instrument was running well recently. 10: Because the on-site adjustment is not good, or because the actual situation after adjustment changes again. Due to the on-site vibration and noise balance adjustment and sensitivity adjustment is not good. Or due to the change of the on-site situation after the adjustment and running for a period of time, the indication problem is caused. This part of the reason is mainly related to the problems 4 and 5. Use an oscilloscope, plus the process operation, to readjust. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Causes of Errors in Vortex Flow Meters'

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