Frequently Asked Questions of Electromagnetic Flowmeter1. What should I do if the electromagnetic flowmeter shows zero reputation?(1) Fill the pipeline with liquid to change the installation method or installation location. (2) Remove and wash the electrode.2. What should I do if the electromagnetic flowmeter does not work properly when there is an impulse voltage interference caused by thunder, etc.? (1) Connect the sensor to the ground wire. (2) If the wire is grounded, check and rule out poor grounding.3. When the water meter of the polymer flooding injection well drops, how long should the water estimation time not exceed?The polymer flooding injection well water meter fails, and the estimated water time cannot exceed 24 hours.4. How to choose an electromagnetic flowmeter correctly and reasonably?The selection of electromagnetic flowmeter should consider five points: caliber and range, pressure, temperature, lining material and electrode material, and on-site working conditions.5. What should be the choice of the electromagnetic flowmeter installation environment? (1) There should be no strong vibration in the installation place. (2) Equipment with strong electromagnetic fields (such as large motors, large transformers) should be avoided as much as possible. (3) Choose a place that is convenient for maintenance and convenient for activities.6. The electromagnetic flowmeter shows a fluctuation of more than 10% at the beginning of the operation. What is the cause of the moxibustion? (1) When installed horizontally, the entire pipeline is not filled with fluid. (2) The ground is faulty.7. What is the cause of the pulsation displayed by the electromagnetic flowmeter in operation? (1) The electrode is completely or severely covered by an insulating object. (2) Leakage at the electrode and other reasons reduce the insulation ability of the electrode to the ground. (3) Pulsating flow.8. When the electromagnetic flowmeter is installed vertically, what are the requirements for the medium? (1) The flow direction of the medium should be from bottom to top. (2) After passing through the transmitter, make sure that the measuring tube is filled with medium.9. Based on what principle is the electromagnetic flowmeter of the injection station made? What parts does it consist of? The electromagnetic flowmeter used in the injection station is made according to the principle of Faraday electromagnetic induction. It consists of two parts: transmitter and converter.10. What is the working principle of the electromagnetic flowmeter in the injection station? The measured medium flows through the transmitter to generate an induced electromotive force, which is then converted into a 0-20mA or 4-20mA DC signal output by the converter.11. What are the characteristics of electromagnetic flowmeters? (1) It can accurately measure the flow rate and is a non-volume meter. (2) The measurement range is wide, the response is fast, and the pressure loss is small. (3) The temperature, pressure, viscosity and flow state of the liquid being measured have little influence on the display value of the meter.12. What are the advantages of electromagnetic flowmeters during use?(1) The transmitter has a simple and reliable structure, no moving parts and throttling parts, no blockage, and no pressure head loss when the fluid passes. (2) Not affected by changes in physical parameters such as temperature, viscosity, density, and pressure of the measured medium. (3) The range adjustment room is large, up to 1:100. (4) No mechanical inertia, sensitive response, easy to use and maintain. 13. For the newly installed electromagnetic flowmeter, how to judge the fault during operation?For the newly installed electromagnetic flowmeter, the fault can be judged according to the output current of the converter or the indication of the digital display during operation.14. After the electromagnetic flowmeter is installed, what should be checked before powering on?1. Check whether all the laid connecting cables are in good condition, whether there are any failures such as blocking, short circuit, insulation, etc.
2. For explosion-proof electromagnetic flowmeters, it is necessary to check whether the junction box in which the cable is installed and the box body are sealed.
Post time: 21-09-21