The split electromagnetic flowmeter is a very commonly used flow measurement component in industrial production and is of great significance to industrial production.
The split electromagnetic flowmeter is a very commonly used flow measurement component in industrial production and is of great significance to industrial production. At present, split electromagnetic flowmeters are widely used in various industrial productions, and the effect of measuring flow is very significant. This article will briefly describe the fault analysis of the Famet split electromagnetic flowmeter during the commissioning period.
(1) Pipeline system installation, etc.
Usual electromagnetic flow sensor installation location is incorrect fault, common such as flow sensor installed in a convenient location to facilitate accumulation and retention High natural gas pipeline network; the flow sensor does not have any pressure, and the liquid is directly discharged into the atmosphere to form a complete measuring pipe; it is installed in a space that may appear due to dirty vertical lines. The installation of the flow meter is special because it is potentially underwater. Make sure there are no floats.
(2) Environment
Spurious current interference from main pipelines, space electromagnetic wave interference, large motor magnetic field interference, etc. usually require good grounding protection to obtain satisfactory results. Single measurement, but in the case of pipes with strong stray current (such as electrolytic workshop assembly lines) cannot be overcome, unique measures should be taken to isolate the flow sensor from the pipe. Introduction to electromagnetic wave-space signal cables, usually single or multiple shielding protection, but there are also cases where shielding protection cannot be overcome.
(3) Fluid
Liquids containing tiny bubbles are usually evenly distributed and do not affect normal measurement. Only the volume flow of liquid and gas is combined; bubbles will increase the fluctuation of the output signal. If large The bubbles cover the entire electrode surface that flows through the electrode, causing the electrode signal to instantly disconnect the circuit, and the output signal will produce large fluctuations.
The low-frequency (50/16hz-50/6 Hz) rectangular wave excitation split-type electromagnetic flowmeter will produce noise when measuring liquid containing solids exceeding a certain content of slurry, and the output signal will also have a certain degree of distortion. fluctuation.
Hangzhou Economic Development Area，Hangzhou 310018，China
