Electromagnetic flow meter is an instrument widely used in industrial flow measurement. It has the characteristics of high measurement accuracy, fast response speed and strong anti-interference ability, so it has been widely used in many industries. However, in the process of selecting electromagnetic flow meter, some problems are often encountered. This article will introduce common problems and solutions to electromagnetic flow meter from aspects such as selection, installation, and maintenance.

1. Selection problem

1. Flow range does not match

When selecting, an appropriate electromagnetic flow meter should be selected based on the actual flow range. If the flow range of the selected electromagnetic flow meter is smaller than the actual flow range, it will not be able to meet the actual demand, otherwise it will waste costs. Therefore, the actual flow requirements should be carefully considered when selecting and a suitable electromagnetic flow meter should be selected.

2. Select inappropriate media

Different media will have different effects on the measurement of the electromagnetic flow meter. Therefore, an electromagnetic flow meter suitable for the medium characteristics should be selected when selecting the model. If an inappropriate electromagnetic flow meter is selected, it may result in inaccurate measurement accuracy or failure to function properly.

3. Choose inappropriate installation methods

The measurement accuracy and stability of electromagnetic flow meter largely depend on the installation method. Therefore, when selecting an electromagnetic flow meter, you should choose an electromagnetic flow meter suitable for actual installation conditions and carefully consider its installation method.

2. Installation problems

1. The installation location is unreasonable

The electromagnetic flow meter should be installed in a stable area of the fluid pipeline and keep the pipeline installed vertically or horizontally to ensure measurement accuracy and stability. If the installation position is unreasonable, it may cause inaccurate measurement accuracy or failure to function properly.

2.Incorrect installation method

The installation method of electromagnetic flow meter should comply with its technical requirements. If installed incorrectly, it may result in inaccurate measurement accuracy or failure to function properly.

3. The installation environment is inappropriate

The electromagnetic flow meter should be installed in a dry, water-free, corrosive gas, strong magnetic field and radiation-free environment. If the installation environment is inappropriate, it may result in inaccurate measurement accuracy or failure to function properly.

3. Maintenance issues

1. Failure to clean in time. The electromagnetic flow meter should be cleaned regularly to ensure measurement accuracy. If not cleaned in time, the scale and oxides on the surface of the electrode and sensor will increase, which will affect the quality of the contact between the electrode and the liquid, distort the measurement signal, and reduce the measurement accuracy. Therefore, regular cleaning of the electromagnetic flow meter is necessary.

2. Improper maintenance When cleaning electromagnetic flow meter, some people may use improper methods, such as using hard objects to wipe the electrode and sensor surfaces, which will cause damage to the electrode surface and affect the measurement accuracy. Therefore, special cleaning fluids and tools should be used during cleaning to avoid electrode damage caused by improper methods.

3. Stress deformation: The internal components of the electromagnetic flow meter are easily affected by stress. For example, factors such as vibration and temperature changes will cause stress deformation of the internal components of the electromagnetic flow meter, resulting in a decrease in measurement accuracy. Therefore, when installing an electromagnetic flow meter, the influence of stress on the electromagnetic flow meter should be minimized to ensure measurement accuracy.

4. Summary

Electromagnetic flow meter is a flow measurement instrument widely used in industrial automation. It has the characteristics of high measurement accuracy, fast response speed, and strong anti-interference ability. When using an electromagnetic flow meter, you need to pay attention to selection, installation and maintenance issues to ensure its normal use and measurement accuracy.

For the selection problem, it is necessary to select the appropriate brand and model according to the actual application requirements, taking into account factors such as measurement range, accuracy, stability and price. During the installation process, the electromagnetic flow meter should be prevented from being affected by stress, and reasonable wiring and correction should be performed. In terms of maintenance, regular cleaning and maintenance of the electromagnetic flow meter is necessary, and care should be taken to avoid using improper methods that may cause electrode damage.

To sum up, only by selecting the appropriate brand and model, correctly installing and maintaining the electromagnetic flow meter can we ensure its normal use and measurement accuracy.