What are the common problems and solutions of electromagnetic flowmeter?

Case introduction

Common problems with electromagnetic flowmeters and their solutions:

1. How to deal with the failure of the electromagnetic flowmeter when it displays zero?

Answer: ( 1) Fill the pipe with liquid and change the installation method or installation location.

(2) Remove and clean the electrode.

2. How to deal with the abnormal operation of the electromagnetic flowmeter when lightning and other impulse voltage interference occur?

Answer: (1) Connect the sensor to the ground wire.

(2) If the grounding wire is already connected, check and eliminate poor grounding conditions.

3. If the water meter of the polymer flooding injection well fails, how long should it take to estimate the water?

Answer: If the water meter of the polymer flooding injection well fails, how long does it take to estimate the water? It cannot exceed 24h

4. How to choose an electromagnetic flowmeter correctly and reasonably?

Answer: When selecting an electromagnetic flowmeter, you should consider the caliber and range, pressure, temperature, lining material and Electrode materials, on-site working conditions and other five conditions.

5. What conditions should be chosen for the installation environment of the electromagnetic flowmeter?

Answer: (1) The installation place should not have strong vibrations.

(2) Try to avoid equipment with strong electromagnetic fields (such as large motors, large transformers), etc.;

(3) Choose a place that is convenient for maintenance and movement.

6. What is the reason why the electromagnetic flowmeter displays a fluctuation of more than 10% at the beginning of operation?

Answer: (1) When installed horizontally, the fluid does not fill the entire pipeline.

(2) The grounding is faulty.

7. What is the reason for the beating of the electromagnetic flowmeter during operation?

Answer: (1) The electrode is completely or severely covered by insulating objects.

(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?

Answer: (1) The flow direction of the medium should be from bottom to top.

(2) Make sure the measuring tube is filled with medium after passing through the transmitter.

9. On what principle is the electromagnetic flowmeter of the injection station made? What parts does it consist of?

Answer: The electromagnetic flowmeter used in the injection station is based on Faraday's Made based on the principle of electromagnetic induction. It consists of two parts: transmitter and converter.

10. What is the working principle of the electromagnetic flowmeter in the injection station?

Answer: The measured medium flows through the transmitter to generate an induced electromotive force, which is then converted into 0 to 0 by the converter. 20mA or 4-20mA DC signal output.

11. What are the characteristics of electromagnetic flowmeter?

Answer: (1) It can accurately measure flow and is a non-volume measuring instrument;

(2) It has a wide measuring range, fast response and small pressure loss.

(3) The temperature, pressure, viscosity and flow state of the liquid being measured have little impact on the value displayed by the instrument.

12. What are the advantages of electromagnetic flowmeters during use?

Answer: (1) The transmitter has a simple and reliable structure, no moving parts and throttling parts, and no blockage will occur. There is no pressure head loss when the fluid passes;

(2) It is not affected by changes in physical parameters such as temperature, viscosity, density, and pressure of the medium being measured;

(3) There is room for adjustment of the measuring range Large, up to 1:100;

(4) No mechanical inertia, sensitive response, easy to use and maintain.

13. For a newly installed electromagnetic flowmeter, how to determine the fault during operation?

Answer: For newly installed electromagnetic flowmeters, 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?

Answer: 1. Check whether all laid connecting cables are in good condition and whether there are any blockages, short circuits, insulation and other faults.

2. For explosion-proof electromagnetic flowmeters, you must check whether the junction box where the cable is installed and the box are sealed.