Talking about the Analysis of the Maintenance Method of Sewage Flowmeter in Daily Use The flow meter is one of the major instruments in process automation instrumentation and devices. It is widely used in metallurgy, electric power, coal, chemical industry, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection and daily life of the people. In various fields such as the national economy, it is an important tool for the development of industrial and agricultural production, energy conservation, improvement of product quality, and improvement of economic efficiency and management level, which occupies an important position in the national economy. However, the use of users must also pay attention to what needs to pay attention to in daily maintenance? Keywords: sewage flowmeter, Fujian sewage flowmeter, Fujian electromagnetic flowmeter, sewage treatment flowmeter, water flowmeter, split electromagnetic flowmeter, large-diameter electromagnetic flowmeter Plastic Moulding Machine,Desktop Injection Molding Machine,Vertical Injection Moulding Machine,Small Injection Molding Machine Turn Machine (Zhejiang) Co., Ltd , https://www.turn-machine.com
1: Manual zeroing method: Refers to the manual zero adjustment of the differential pressure transmitter with a multimeter. This method can be used when the zero point of the differential pressure transmitter has a slight drift. The method is as follows: The differential pressure transmitter has positive , negative two signal lines, remove one of them, multimeter adjusted in 4-20mA DC gear, the multimeter string in, differential pressure transmitter has a zero screw (marked with zero on the zero adjustment button), Shun When adjusting the hour hand, the current increases and the counterclockwise decreases. When the multimeter displays 4mA, the zero point is adjusted at this time.
Â
2: Valve switching sequence during condensation (mainly for steam): In the normal operation, the middle valve of the three-valve group is closed, and the two valves are open. If it is necessary to discharge dirty water or re-condense, close the two valves first and then open the middle valve. Finally, the root drain valve is opened to drain. If the condensation is complete, you want to close the middle valve, and then slowly open the valves on both sides. The system is in normal operation.
3: When the measuring medium is steam, an on-line zeroing point should be performed because there may be a slight height difference in the condensing plate during installation. When the measuring fluid has a small flow rate, the height difference will have a greater influence on the flow rate. (1cm water column is 100Pa)
Maintenance:
Â
1. The probes of vortex flowmeters should be regularly cleaned. It has been found in the inspection that individual probe holes have been blocked by dirt and even wrapped in plastic sheets, affecting normal measurements.
Â
2. Because the determination of K-factor is very important in the entire process of vortex street, the accuracy of K-factor directly affects the accuracy of the circuit, and the replacement of parts and the wear of the process piping may affect the K-factor. The Eastern Chemical Plant also lacks the means and capability of calibration. It can only send calibrations and is affected by the operation of the process. To remove the vortex from the pipeline, it takes 5 to 6 days to send the calibration time, and the process is difficult to satisfy, so that it cannot be determined. K factor. This year, through the transformation of flow meters, although smaller calibrating conditions for vortex street are available, vortex streets with large diameters are still incapable. Afterwards, vortex street calibration methods should be used, using standard frequencies and portable ultrasonics. Flowmeter, measuring the instantaneous flow in the pipeline and the pulse output frequency of the sensor, on-site calculation of K-factor
Â
3, the installation of wet probes. Should be dried once a day, or for moisture treatment. Because the probe itself is not damp-proofed at the end, the dampness affects the operation.
4. Regularly check the grounding and shielding to eliminate outside interference. Sometimes the indication is due to interference.
Â
5, the management of the data data of the instrument should arouse sufficient attention, in order to facilitate the future work.
Talking about the Analysis of the Maintenance Method of Sewage Flowmeter in Daily Use