Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-10-19
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-10-19: Discussion question: 270. When an electromagnetic flowmeter is in operation and its signal becomes progressively weaker or drops suddenly, what could be the possible reasons? How to deal with it?
The first reason is that, regardless of the type of flow meter, pipe blockage can lead to a reduced flow rate or no flow at all. For electromagnetic flowmeters, it may also be caused by insufficient power supply to the magnetic induction coil or no power at all.
1. There is indeed no data left； 2、There is a problem with the excitation ； 3. The pipe is blocked
1. Process-related issues: no medium is arriving, or the medium that arrives is not the correct one. 2. The electrodes are dirty and need to be cleaned. 3. The electrodes have been corroded. 4. There is a fault with the circuit board
1. If dirt has accumulated on the inner wall of the measurement conduit, it should be replaced; 2. The signal socket may be corroded and should be cleaned or replaced; 3. The lining of the measurement conduit may be damaged and should be replaced.
(1) If dirt has accumulated on the inner wall of the measurement conduit, it should be replaced; (2) The signal socket may be corroded and should be cleaned or replaced; (3) The lining of the measurement conduit may be damaged and should be replaced.
1. Dirt may have accumulated on the inner wall of the measurement conduit, and it should be replaced; 2. The signal socket may be corroded, and it should be cleaned or replaced; 3. The lining of the measurement conduit may be damaged, and it should be replaced.
1. The electrodes are contaminated or damaged; check the electrodes. 2. There is electromagnetic interference in the vicinity; eliminate the source of interference. 3. The grounding wire has come loose; re-establish grounding. 4. The control valve downstream of the flow meter is faulty; inspect and fix the issue with the control valve. 5. Abnormal operating conditions
(1) If dirt has accumulated on the inner wall of the measurement conduit, it should be replaced; (2) The signal socket may be corroded and should be cleaned or replaced; (3) The lining of the measurement conduit may be damaged and should be replaced.
1. If dirt has accumulated on the inner wall of the measurement conduit, it should be replaced; 2. The signal socket may be corroded and should be cleaned or replaced; 3. The lining of the measurement conduit may be damaged and should be replaced.
1. If dirt has accumulated on the inner wall of the measurement conduit, it should be replaced; 2. The signal socket may be corroded and should be cleaned or replaced; 3. The lining of the measurement conduit may be damaged and should be replaced.