Electromagnetic liquid flowmeter manual

Time: 2024-10-18
Equipment Configuration:Electromagnetic liquid flowmeter

The electromagnetic liquid flow meter is a non-contact flow measurement instrument that measures the volume flow of fluid based on Faraday's law of electromagnetic induction.

Project Overview

Electromagnetic liquid flow meter manual

Overview

The electromagnetic liquid flow meter is a non-contact flow measurement instrument that measures the volume flow of fluid based on Faraday's law of electromagnetic induction. This flow meter is used in petroleum, chemical industry, metallurgy, pharmaceutical, food and other industrial fields. It has the advantages of wide measurement range, high precision and easy installation.

Principle

The principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. When a conductive fluid flows in a magnetic field, an induced electromotive force is generated in the conductor, the magnitude of which is proportional to the volume flow rate of the fluid. After the induced electromotive force is detected by the electrode, the input signal processing circuit converts it into an output signal that is linearly related to the volume flow rate.

Structure

The electromagnetic liquid flowmeter consists of the following parts:

Pipeline: a pipe used to carry the measured fluid. Excitation coil: A coil that generates a magnetic field and is supplied with alternating current or pulse current. Measuring electrode: An electrode that detects induced electromotive force. Signal processing circuit: converts the induced electromotive force into an output signal that is linearly related to the volume flow rate. Installation

The installation of the electromagnetic liquid flow meter mainly includes the following steps:

Select the installation location: The installation location should avoid pipe vibration, electromagnetic interference and other factors that affect measurement accuracy. Install the pipeline: Connect the flow meter pipeline to the fluid pipeline to be measured, and ensure there is no leakage in the pipeline. Install the flow meter: Install the flow meter on the pipe and ensure that the flow meter is concentric with the pipe. Electrical connection: Make the electrical connection according to the flow meter instruction manual. Debugging

The debugging of the electromagnetic liquid flow meter mainly includes the following steps:

Zero point calibration: When there is no fluid flow, adjust the zero point calibration knob until the output signal is zero. Full-scale calibration: Use a calibration source with known flow rate, and adjust the full-scale calibration knob until the output signal is linearly related to the calibrated flow rate. Maintenance

The maintenance of electromagnetic liquid flowmeter mainly includes the following aspects:

Regularly check whether the flowmeter housing and connections are loose. Clean the electrode surface regularly to prevent dirt and sediment from affecting measurement accuracy. Calibrate the flow meter regularly to ensure its measurement accuracy. Troubleshooting

Some faults may occur during the use of the electromagnetic liquid flowmeter. Common faults and troubleshooting methods are as follows:

Fault phenomenon Possible causes Troubleshooting methods Output signal fluctuation or unstable pipeline The output signal of the vibration mounting bracket is offset or drifted. Shield the signal line from electromagnetic interference and stay away from the source of electromagnetic interference. The output signal is low. The electrode is contaminated. Clean the electrode surface. The output signal is high. The excitation coil is damaged. Replace the excitation coil. Selection guide

In selection Type electromagnetic liquid flowmeter, the following factors should be considered:

Measurement range: The measurement range of the flowmeter should be greater than or equal to the flow rate of the fluid being measured. Accuracy: The accuracy of the flow meter should meet the usage requirements. Measuring medium: The measuring medium of the flow meter should comply with the material andPerformance requirements. Installation conditions: The installation location and environmental conditions of the flow meter should comply with the installation requirements of the flow meter. Application

Electromagnetic liquid flowmeter is used in the following fields:

Petroleum industry: crude oil, refined oil, and natural gas flow measurement. Chemical industry: raw material, intermediate, product flow measurement. Metallurgical industry: liquid metal and slag flow measurement. Pharmaceutical industry: flow measurement of raw materials, intermediates and finished products. Food industry: flow measurement of beverages, juices, and dairy products. Advantages

Electromagnetic liquid flow meters have the following advantages:

Non-contact measurement: no resistance or contamination of the fluid is caused. Wide measuring range: small measuring flow can reach 0.1 m/s, measuring flow can reach 30 m/s. High accuracy: the accuracy can reach 0.2%~1%. Easy to install: no special installation requirements required. Strong anti-interference ability: after shielding the signal line, it can effectively resist electromagnetic interference. Precautions

When using an electromagnetic liquid flowmeter, you should pay attention to the following aspects:

The fluid should be conductive. The inner diameter of the flow meter pipe should be consistent with the inner diameter of the fluid pipe being measured. Strong magnetic fields and vibrations should be avoided around the flowmeter.

Related Cases

The magnetic inductive flowmeter industry, these are successful cases with comparable and reference value.

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