1 lightningproof settlement meter or area measuring electromagnetic flowmeter, in rural areas of relatively empty, especially in the thunderstorm weather cover larger area of guangdong, the lightning protection of electromagnetic flowmeter is a more serious test. After strict well grounding, power protection, installation of the electromagnetic flowmeter in open ground the probability of being struck by lightning or high. So * is simple and effective way is to improve the lightning protection performance of flow meter itself, such as can not fundamentally solve, separation should be made for the internal circuit protection, so even if the lightning damage, can also decrease the cost of replacement. 2 power supply problem due to the electromagnetic flowmeter to external power supply, causing outdoor installation is not convenient, also limit the use of electromagnetic flowmeter pipe network in the suburbs. In addition, the electromagnetic flowmeter do not bring their own power, once the electricity, will cause data loss is used as the settlement of a water meter flowmeter, such measurement and calculation of the blackout period lack water also puts forward a new problem, usually to discuss water supply enterprises and users are case handling, increase a lot of work. If electromagnetic flowmeter can bring their own power, can fundamentally solve this problem, will also promote the popularization and application in clearing water meter. And now you can use lithium batteries, solved the problem. 3 signal transmission problems for regional network of electromagnetic flowmeter can provide urban water supply scheduling with certain decision-making information, so we hope both for the user and settlement and regional network flow of the electromagnetic signal is continuous in real time. Current electromagnetic flowmeter require additional development or choose other data transmission system in water supply enterprises, to achieve real-time monitoring of data. This not only increase the cost of investment, but also increase the difficulty of the operation and management aspects. If electromagnetic flowmeter in the instrument itself to accomplish the automatic conversion of the signal and wireless transmission, reduce the data acquisition of compatible or mutual conversion and so on, it will provide convenience for use of the enterprise, also will increase as the application of electromagnetic flowmeter greater advantage. 4 conclusion electromagnetic flowmeter measurement of high precision, high sensitivity, good stability and its application in measurement of water supply enterprises will be more and more widely, especially in the factory, large area such as diameter, installation environment a better place, the use of electromagnetic flowmeter has been very mature.
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