AB flowmeter

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1. Wiring method of electromagnetic flowmeter

The wiring method of electromagnetic flowmeter mainly includes two parts: internal wiring and external wiring. Internal wiring: Number of wires: usually 5, used for connecting sensors and conversion amplifiers. Specific wiring: Two wires for the magnetic coil and three wires for the electrodes, with AB being the two electrode wires and C being the grounding wire. External wiring: Power access terminal: usually a two-wire connection. Signal output line: including two 4 to 20mA output lines, used for transmitting current signals; Two RS232 communication cables are used for serial communication according to the RS232 standard; Two RS485 communication cables are used for serial communication according to the RS485 standard. In addition, there is a grounding terminal judgment line on the cylinder body, which is used for the grounding of the punching equipment. Attention: Before wiring, it is necessary to carefully distinguish the product model to ensure that the wiring method meets the equipment requirements. Grounding is an important link in the wiring of electromagnetic flow meters, and it is necessary to ensure good grounding to ensure the normal operation and safety of the equipment.

2. Wiring method of electromagnetic flowmeter

The wiring of electromagnetic flowmeter is divided into two parts: internal wiring and external wiring.

. Internal wiring typically includes 5 wires used to connect sensors and conversion amplifiers. Specifically, it includes two magnet coil connections (XY), two electrode connections (ACB, AB), and one grounding wire (C). External wiring usually includes power input terminals and signal output lines, with four signal outpu AB flowmeter

t lines, including two 4-20mA output lines and two communication lines (RS232 and RS485). In addition, there is a grounding terminal wire on the cylinder. During product installation, it is usually only necessary to follow the instructions for external wiring, and the process is not complicated. However, if the pipeline is made of all plastic and non-conductive, grounding treatment needs to be done to avoid inaccurate or drifting flow. The magnetic circuit of an electromagnetic flowmeter can be a DC magnetic circuit or an AC magnetic circuit. The DC magnetic circuit uses permanent magnets, which have a simple structure and are less affected by AC magnetic field interference. However, they can easily polarize the electrolyte liquid passing through the measurement tube, resulting in an increase in internal resistance between the electrodes. Therefore, when the diameter of the pipeline is large, an AC magnetic circuit is usually used, which uses an alternating magnetic field generated by a 50Hz power supply excitation. There is a complete layer of electrical insulation lining on the inside of the measuring conduit and the flange sealing surface, which directly contacts the measured liquid. Its function is to increase the corrosion resistance of the measuring conduit and prevent induced potential from being short circuited by the metal measuring conduit wall. The lining materials are mostly corrosion-resistant, high-temperature resistant, and wear-resistant polytetrafluoroethylene plastics or ceramics. The induced potential signal generated by liquid flow is very weak and easily affected by various interference factors. The function of a converter is to amplify and convert the induced potential signal into a unified standard

1. Wiring method of electromagnetic flowmeter

2. Wiring method of electromagnetic flowmeter

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