Flow meter verification experiment report | Can differential pressure flow meters be adjusted to a larger range

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How to improve the accuracy of plug-in electromagnetic flow meters?

1、 Accurate selection of electromagnetic flow meters; Firstly, it is necessary to achieve a reasonable selection of the diameter of the plug-in electromagnetic flowmeter sensor: the selection of this indicator will have a decisive impact on the flow velocity of the fluid in the pipeline, and will also have a significant impact on the output potential parameters. Therefore, in the process of selecting an electromagnetic flowmeter, it is not necessarily necessary to use the diameter of the connecting process pipeline as the selection indicator, but should be based on the actual flow rate used. Generally speaking, when the fluid flow velocity inside the pipeline to be installed is between 1.5~3.0m/s, the diameter of the sensor needs to be consistent with the diameter of the pipeline to be installed. However, when the fluid flow velocity inside the pipeline is less than 0.5m/s, the instrument diameter needs to be controlled below the pipeline diameter standard. Secondly, in order to adapt to the measurement conditions of different media, such as the temperature, pressure, corrosiveness, and wear requirements of fluid media, different lining and electrode materials should be selected. If you prefer wear resistance, it is recommended to choose polyurethane rubber materials. If you prefer corrosion resistance, you tend to choose polytetrafluoroethylene materials.

2、 The reasonable installation of electromagnetic flowmeter firstly, from the perspective of pipeline installation requirements, the flow velocity distribution in the electrode plane state has begun to show certain differences compared to the initial verification data. The mai

Flow meter verification experiment report

n indicator that causes a special flow velocity distribution during this process is the configuration level of the upstream pipeline connections of the sensor. If there are problems or defects in pipeline installation, it may cause significant displacement of the electromagnetic flowmeter during its normal use. At the same time, from the perspective of practical engineering applications, the installation of the front and rear straight pipe sections of the sensor needs to ensure that the flow velocity can exhibit a completely symmetrical distribution relationship under the reference of the central axis, which is of great value for ensuring the accuracy of electromagnetic flowmeter operation. Meanwhile, it is worth noting that the accuracy of electromagnetic flow meters may also be affected by the conductivity level of the conductive fluid inside the measuring tube. In order to eliminate the adverse effect of this factor on the accuracy of electromagnetic flow meters, measures need to be taken: if it is required by engineering practice operating conditions, other types of Lingjing media need to be added inside the pipeline where the electromagnetic flow meter is installed, and the corresponding addition work of the media needs to be carried out in the downstream section of the electromagnetic flow meter installation. If it is necessary to add a medium upstream due to objective factors, it is necessary to increase the distance between the injection area and the installation area of the electromagnetic flowmeter as much as possible (the basic control requirement is ≥ 50 * inner diameter of the measuring tube), in order to ensure that the fluid flows more evenly and smoothly through the electromagnetic flowmeter under the add

Flow meter verification experiment report | Can differential pressure flow meters be adjusted to a larger range

How to improve the accuracy of plug-in electromagnetic flow meters?

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