2022-10-27
The electromagnetic water meter has the characteristics of high measurement accuracy, wide range, and no damage due to overloading. It is suitable for water metering with large flow and large instantaneous flow change, and can better solve the problems existing in mechanical water meter metering.The working principle of an electromagnetic water meter is the same as that of the electromagnetic flowmeter, both of which are based on Faraday's electromagnetic induction law. The electromagnetic water meter adopts a specially designed sensor excitation system and a high-performance lithium battery power supply system and uses an embedded ultra micro power processor with full digital signal processing function. Its main performance features are:(1) It is designed with low power consumption and is powered by a built-in 3.6V lithium battery. The excitation current is ≤ 20 mA. It can work continuously for 5~10a and it is convenient to replace the battery.(2) With an automatic two-way measurement function, it can display instantaneous flow, flow rate, pressure, positive and negative cumulative total, battery power, etc.(3) There are no movable and resistance parts in the measuring pipe, no winding, blocking, no pressure loss, and it can work continuously for a long time.(4) The measuring range is wide, the measuring range of velocity is 0~15m/s, and the measuring accuracy is high (± 1.0%).(5) The measurement is stable, and the measurement accuracy is not affected by the change of physical parameters such as temperature, pressure, accuracy, and density of the measured medium.(6) It has the functions of pulse output, RS485 interface, and GPRS/4G wireless data remote transmission (supporting GSM, GPRS, and CDMA).(7) With the data saving function: more than 1000 groups of flow data can be saved, and the data storage time can be set and queried arbitrarily according to requirements.As for the application benefits of the electromagnetic water meter, let's give an example to illustrate:Due to the need for building infrastructure water, two DN80 mechanical water meters were installed for metering in a residential area. The water used is temporary building water, and the water supply is still difficult to meet the user's requirements. There are many complaints. Due to the large change in instantaneous flow, the water meter is frequently damaged, and the water meter has to be replaced once every three months on average. The maintenance cost is very high. Later, a DN100 battery-powered electromagnetic water meter was used to replace two DN80 mechanical water meters, a significant increase in water sales.
2022-10-27
Electromagnetic flowmeter is widely used in petroleum, chemical industry, metallurgy, textile, food, pharmaceutical, paper, and other industries, as well as environmental protection, municipal management, water conservancy construction, and other fields. According to customers’ request, we can make wireless remote transmission as Lora/LoraWan/NB/4G, etc.Precautions before installation of explosion-proof converter:1、First make the signal line and the excitation line through the processed gasket (the size of the outer diameter 26, the inner hole 5, the thickness of 3mm) center hole, and the gasket fell flat to take over the bottom plane2、Use a canvas to block the gap between the center hole of the gasket and then inject a height of about 25mm of epoxy resin in the connector and connect it to the safety cutout (circular circuit board) to make the safety cutout on the surface of the epoxy glue3、In the connector continue to inject epoxy glue, to ensure safety cutout the epoxy resin under the height of not less than 20mm (in the case not affect the assembly, inject more glue to improve safety)Installation requirements:1. Flow direction must be the same direction as marked on the meter.2. Make sure the meter is full of pipe.3. Straight pipe at inlet and outlet are 5 times DN and 2 times DN.4. Avoid negative pressure.5. The instrument is far away from strong magnetic fields, such as large transformers, large motors, high voltage lines, and other places.If the tested medium pipeline is a plastic or metal pipeline with a protective layer and anticorrosion layer, the sensor must install a grounding electrode or grounding ring!!!Generally, a grounding device should be installed, and the grounding wire should be more than 4 mm2 copper wire. The grounding resistance is preferably less than 10 ohms.Installation of electromagnetic flowmeter on a metal pipe: there is no insulation coating on the inner and outer walls of the metal pipe.