How to deal with A/D saturation of electromagnetic flow meter

Abstract: The information on the processing method of the A/D saturation of the electromagnetic flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. A/D saturation occurs when the electromagnetic flowmeter is applied, which is usually caused by improper installation and arrangement of the electromagnetic flowmeter or the mixing of different phases in the medium in the pipeline. The treatment method: 1. Cavitation Errors formed 2. The liquid is mixed with gas (bubbles). More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following is the details of the article on the treatment method of A/D saturation of electromagnetic flowmeters. When the electromagnetic flowmeter is applied, A/D saturation occurs, which is usually caused by improper installation and arrangement of the electromagnetic flowmeter or the mixing of different phases in the medium in the pipeline. Treatment methods: 1. Cavitation Mistakes formed 2. Mixed gas (bubble) in liquid 3. Wear and deposition scaling 4. Improper installation and arrangement of electromagnetic flowmeter for condensate in gas Mainly manifested in the following aspects: upstream disturbance source and downstream disturbance source, upstream disturbance There are spiral welded pipes and various types of blocking pipes (such as elbows, reducers, branch pipes and valves), which are divided into two categories according to the type of disturbed flow. The first type has distortion and secondary flow in the velocity distribution; Class 2 has vortices in addition to velocity distribution distortion and secondary flow. The most common types of pipe fittings are bends and various bend combinations (like flat double bends and three-dimensional double bends). Various types of flow meters have different sensitivity to upstream flow disturbances, so their installation requirements must be put forward. The downstream disturbance source is mainly the disturbance caused by elbows, valves, etc. to the fluid flow, which propagates upstream, and can affect the distance several times the length of the pipe diameter. In most cases, 5 pipe diameters downstream is sufficient; some special cases may be slightly longer, but 10 pipe diameters downstream can be considered to be able to reliably cope with any disturbances caused by downstream pipe fittings. If the length of the straight pipe section cannot meet the requirements and the measurement accuracy is to be ensured, one of the following two workarounds can be taken: 1) Calibrate under the field installation conditions, or use the disturbance choke piece and the instrument together with the same field installation conditions. Calibrated on a laboratory flow calibration device. 2) Install a flow conditioner as described in the following section upstream of the meter. 1. The gasket is eccentric (misaligned). The installation of the sealing gasket is eccentric, which covers part of the flow area and causes the velocity distribution to be seriously distorted and asymmetrical. Since the asymmetric flow occurs at the inlet of the flow sensor, that is, the length of the upstream straight pipe section is zero, it will bring measurement errors to the differential pressure, turbine, vortex, ultrasonic, target, electromagnetic and other instruments. For example, the eccentricity of the DN50mm electromagnetic flowmeter gasket is 10mm, and the measurement error is as high as 4% to 10%. 2. The acute angle of the standard orifice plate is not installed on the upstream surface 3. The inner diameter Dg of the sealing gasket between the instrument and the pipe is smaller than the inner diameter Dp of the pipe and the inner diameter Dm of the instrument to generate a beam. Dg should be slightly larger than Dm, such as Dg 4. Install the instrument sensitive to vibration interference on the pipeline with vibration 5. Lack of necessary protective accessories 6. The flow meter is in the wrong flow direction. Although the inner diameter of the gasket is too small or the installation is eccentric, although it has no or very little effect on the flow value of volumetric, float, Coriolis mass and other instruments, it will increase additional pressure loss. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The Treatment Method of A/D Saturation of Electromagnetic Flow Meter'

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