1. Mine protection of electromagnetic flowmeters
Whether it is a sedimentation meter or a regional electromagnetic flowmeter, electromagnetic flowmeter has become a relatively severe test in the relatively open suburbs, especially in the coverage of large-scale thunderstorm weather in Guangdong.
After strict grounding and power protection, the probability of electromagnetic flowmeters installed in open areas being struck by lightning is still high. According to customer feedback, at least one of the four flowmeters used for regional traffic measurement is damaged by lightning every year and can not be repaired. You can only buy new conversions.
Equipment costs are high. Other water departments usually use buildings and houses on electromagnetic flow meters, making land networks and installing lightning rods to avoid lightning. This is very effective, but the water department must also solve the problem of land use rights and the coordination and planning environment with the surrounding environment. It's not that easy.
Therefore, the most effective and simple method is whether the instrument can improve its lightning protection performance. If it can not be fundamentally solved, internal circuit separation protection can also be expected. Even if the lightning strike is damaged, the replacement cost can be reduced.
2. Electricity supply problem of electromagnetic flowmeter
Because the electromagnetic flowmeter needs external power supply, it directly causes outdoor installation inconvenience, and also limits the use of electromagnetic flowmeter in suburban pipeline networks. In addition, the electromagnetic flowmeter does not have its own power supply. Once the power is cut off, the flowmeter used for water meter settlement will lack data. The new issue of measuring and calculating power outages and water outages has been raised. If the electromagnetic flowmeter can carry its own power supply(with battery power supply), it can fundamentally solve this problem and promote its application in sedimentation meters.
3. Signal Transmission Problem of Electromagnetic Flow Meter
The electromagnetic flowmeter used in the regional network can provide certain decision-making information for the urban water supply dispatch. Therefore, whether it is for users and settlements or regional networks, it is hoped that it will be a real-time continuous electromagnetic flow signal. Electromagnetic flowmeters now require additional development or selection of other data transmission systems in water supply companies to achieve real-time data monitoring. There are also some disappointments in operating and management costs. If the electromagnetic flowmeter itself can complete the automatic conversion of signals and wireless transmissions(electromagnetic flowmeters using Rs485, Mbus, 232, Hart protocol transmission protocols(optional), only the management water supply company needs to consider receiving signals, reducing the compatibility of different data acquisition and conversion, It provides convenience for the use of enterprises and also increases the advantages for the application of electromagnetic flowmeter.
In summary, the electromagnetic flowmeter has high measurement accuracy, high sensitivity and good stability, and is more and more widely used in water supply enterprises. Especially in large diameter factories and small areas, where the installation environment is good, the use of electromagnetic flowmeters has become very mature.