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Problems encountered by vortex flowmeters

by:Sure     2021-08-06
1. Problems in selection. Some vortex sensors have a larger selection in diameter selection or after design selection due to changes in process conditions. The actual selection should be as small as possible to improve measurement accuracy. The reasons for this are mainly the same. Questions ①, ③, and ⑥ are related. For example, a vortex pipeline is designed to be used by several equipment, due to the problem of process part 1, selection. Some vortex sensors have a larger selection due to changes in process conditions after the selection of the caliber or the selection of the design. The actual selection should choose the smallest caliber possible to improve the measurement accuracy. For example, a vortex pipeline is designed to be used by several equipment. Because some equipment in the process is sometimes not used, the current flow rate in actual use is reduced. The actual use causes the original design to select a diameter that is too large, which is equivalent to an increase in the measurable flow rate. The lower limit is not guaranteed when the process pipeline has a small flow rate, and it can be used when the flow rate is large, because it is sometimes too difficult to rebuild. Changes in process conditions are only temporary. It can be combined with the re-tuning of the parameters to improve the accuracy of the indication. 2. Problems with installation. The main reason is that the length of the straight pipe in front of the sensor is not enough, which affects the measurement accuracy. The reason for this is mainly related to the problem ①. For example, the straight pipe section in front of the sensor is obviously insufficient. Since FIC203 is not used for measurement, but only for control, the current accuracy can be used equivalent to degraded use. 3. The reason for the parameter setting direction. Due to the parameter error, the indicator indication is wrong. The parameter error makes the calculation of the full-scale frequency of the secondary meter wrong, and the reason for this is mainly the same as the problem. The same full-scale frequency makes the indication inaccurate for a long time, and the actual full-scale frequency is too much. The calculated full-scale frequency makes the indication fluctuate in a large range and cannot be read. The inconsistency of the parameters in the data affects the final determination of the parameters, and finally passed Re-calibration combined with mutual comparison to determine the parameters and solve this problem. 4. The secondary instrument is faulty. There are many faults in this part, including: there is a disconnection on the circuit board of the instrument, the display of individual digits in the range setting is broken, and the display of individual digits in the K coefficient setting is broken, making it impossible to determine the range setting and K coefficient setting. The problem is solved by fixing the corresponding fault.
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