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How to set the range of electromagnetic flowmeter and precautions for use
2026-07-21
Author:
Yanhe Machinery Fittings Factory
Adjust the scale flow rate, which is the range of the electromagnetic flowmeter.
Precautions for using electromagnetic flowmeter
1、 Like other flow meters, although the measurement range ratio of electromagnetic flow meters is 30:1, which is higher than vortex flow meters and differential pressure flow meters, it is also limited. Many customers often compare it with water meters when ordering a meter, thinking that it can measure very low flow rates;
In general, it can only measure 0.1m/s. If the flow rate is lower than this, it is difficult for the electromagnetic flowmeter to measure correctly. So in the initial stage of ordering, it is necessary to clarify the flow range. When placing an order, it is not possible to order according to the original pipeline diameter. The instrument diameter should be determined based on your actual flow rate.
2、 Like other flow meters, electromagnetic flow meters also have requirements for straight pipelines before and after installation, although the requirements are lower than other types of flow meters. However, the key point is to meet the requirement of full pipeline and then full pipeline. Insufficient flow can easily cause the flowmeter to jump:
3、 Like other flow meters, electromagnetic flow meters also have protection levels. Generally, the protection level for integrated flow meters is IP65, and for split type flow meters (for sensors) it is IP68. If customers have requirements for the installation environment of the instrument and the installation location is in underground manholes or other humid places, it is recommended that customers choose split type flow meters. To avoid selecting the wrong one and causing damage to the instrument.
4、 Electromagnetic flow meters can measure corrosive liquids, but in the initial stage of ordering, customers need to provide the correct properties of other measuring media to avoid errors in electrode selection during selection, which may result in the sensor being scrapped during later use, causing inconvenience and economic losses to customers.
5、 Although electromagnetic flow meters have good performance and are generally not damaged, due to their principle, the sensor electrode surface is always in contact with the liquid, and over time, the electrode surface is more susceptible to contamination.
Therefore, in general, for electromagnetic flowmeters, if customers have the conditions to disassemble them, it is recommended to remove and clean the electrodes once every one to one and a half years to protect the measurement accuracy of the entire flowmeter. Any instrument requires maintenance, and electromagnetic flow meters are no exception.
6、 When the main pipeline is a vertical pipeline, it is generally required that the water flow should be from bottom to top, and should not be from top to bottom as much as possible. The latter can easily cause significant fluctuations in traffic. In addition to filling the pipes, this is also very important for installation, followed by the distance between the front and rear straight pipes.
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