Liangbang Instrument Analyzes Common Faults of Vortex Flowmeters
Vortex flowmeters are prone to failures in terms of use, installation, and so on. For common situations, let's introduce them in detail: First of all, in the course of use, there are often cases where the indication is long-term inaccurate, there is no indication at all, the indication is wide-ranging, the reading is not possible, the indication is not returned to zero, and the indication is not accurate when there is a small flow. In addition, there may be no indication when there is a small flow rate, or when the flow rate is large, or even when the flow rate changes, the indicated change cannot follow up, and the K factor of the instrument cannot be determined. However, there are many main reasons why these problems occur in vortex flowmeters. For example, improper selection will have a serious impact. Some vortex sensors in the caliber selection or after the selection of the design due to changes in process conditions, making a large selection - a specification, the actual selection should be selected as small as possible to improve the measurement accuracy. Second, the installation process is not in place, it will also affect the normal use of vortex flowmeters. Generally, the length of the straight pipe section in front of the sensor is insufficient, which affects the measurement accuracy. For example, the straight pipe section in front of the sensor is obviously insufficient. Since the FIC203 is not used for metering, it is only used for control. Therefore, the current accuracy can be equivalent to the degraded one. Parameter error is also one of the common faults. Incorrect general parameters may cause the instrument to indicate an error. The parameter error makes the secondary instrument full frequency calculation error. Full-scale frequency is similar to the indication is not allowed for a long time, the full-scale frequency of the actual full-scale calculation of the full-scale frequency indicates that a wide range of fluctuations, can not read, and the inconsistency of the parameters on the data has affected the final determination of the parameters, and finally passed The recalibration combined with each other determines the parameters and solves this problem. The secondary instrument that experienced the most failures, including the disconnection of the primary instrument circuit board, the display of individual bits in the measurement range, the badness of the K-factor setting, and the inability to determine the range setting and the K-factor. set up. By fixing the corresponding fault, the problem is solved. In addition, the vortex flowmeter's four-circuit connection problem also needs to be highly regarded. It is easy to make mistakes in the problem of installing the line. Generally, the line connection on the surface of the circuit is very good. Carefully check that some of the connectors have actually been loosened and cause the circuit to be interrupted. Some connectors are tight but they are fastened due to the problem of secondary lines. The screws are fastened to the wire, and this condition can also cause the circuit to break. In the vortex flowmeter installation process, the connection between the secondary instrument and the subsequent instrument is also an issue that the installer needs to pay attention to. In general, the mA output circuit of the secondary instrument is interrupted due to problems with the subsequent instrument or due to the overhaul of the subsequent instrument. Especially for the follow-up recorder, in the case of long-term damage to the recorder can not be repaired, we must pay attention to the output of the secondary short-circuit meter. Also, the condition that causes the circuit to have no indication is usually caused by the fault of the flat cable of the secondary meter. Due to the long-term operation of the vortex flowmeter, and the influence of dust, resulting in failure of the flat-axis cable, the problem is solved by cleaning or replacing the flat-axis wires. Of course, on the link of the line, there is the secondary meter display head coil fixed screw loose, causing the head sink, the pointer and the case of friction, action does not work, by adjusting the header and re-fix, the problem is resolved. Out of the problems that have arisen in the above installation, there is the problem of using the environment. Especially in the sensor part installed in the well, the circuit board is damp due to the high humidity in the environment. Through corresponding technical reform measures, the part of the sensor with a large environmental humidity was re-disposed of the probe part and the conversion part, and a separate sensor was used. Therefore, the working environment was good, and this part of the instrument was working well the other day. There are many reasons causing vortex flowmeter failures. To avoid the problems raised above, professionals need to install vortex flowmeters, and pay attention to the correctness of the selection and correct maintenance measures. We also recommend that you read “Vortex. What are the requirements for the installation of street flow meters? to help you better understand and use vortex flowmeters. Water Soluble Embroidery,Sequin Embroidery Fabric,Bridal Lace Fabric,Embroidery Lace Dress Fabric Shaoxing MingFang Textile Co., Ltd , https://www.printingsfabrics.com