Problems with electromagnetic flowmeters in practical use

The use of electromagnetic flowmeter problems: 1. Lightning protection issues: whether it is the settlement of the water meter or regional electromagnetic flowmeter, in the more open suburbs, especially in Guangdong, which covers a relatively large area in thunderstorms, electromagnetic flowmeter lightning protection is a More severe test. After strict grounding and power protection, the electromagnetic flow meters installed in open areas are still highly prone to lightning strikes. Each of our four flowmeters for area flow measurement is damaged by lightning at least 2 times a year, and it cannot be repaired. Only new converters can be purchased and the cost is high. Other water divisions usually use electromagnetic flowmeters to build houses, make ground nets, and install lightning rods to avoid lightning. The effect is obvious. However, the Water Division must also solve the problem of land use rights and coordination with the surrounding environment. The procedures are more complicated. Therefore, the simplest and most effective method is to improve the lightning protection performance of the flowmeter itself. If it cannot be fundamentally solved, the internal circuit of the flowmeter should be separated and protected so that even if the lightning strike is damaged, the replacement cost can be reduced. 2. Power supply problem: Since the electromagnetic flowmeter requires external power supply, it is inconvenient to install outdoors, and it also limits the use of the electromagnetic flowmeter in the suburban pipe network. In addition, the electromagnetic flowmeter does not come with its own power supply. Once the power is turned off, it will cause the loss of flow meter data for use as a clearing water meter. This also raises new problems in the measurement and calculation of the amount of water that is lost during the power interruption period. Users are dealt with case handling, adding a lot of work. If the electromagnetic flowmeter can bring its own power supply, it can fundamentally solve this problem, it will also promote its promotion and application in the settlement of water meters. 3. Signal transmission problem: The electromagnetic flowmeter used for the regional pipeline network can provide certain decision-making information for urban water supply dispatch. Therefore, we hope that the electromagnetic flow signals for the user's settlement or regional pipeline network are continuous in real time. Current electromagnetic flowmeters require water companies to develop or use other data transmission systems in addition to real-time data monitoring. This will not only increase the cost of investment, but also increase the difficulty of operation and management. If the electromagnetic flowmeter can complete the signal automatic conversion and wireless transmission in the instrument itself, reduce the data acquisition compatibility or mutual conversion and other issues, it will provide convenience for the enterprise, it will also increase the application of electromagnetic flowmeter Advantage.

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