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Ultrasonic flowmeter wiring is mainly divided into two parts: host wiring and probe wiring. There are differences between different brands and models, and it is necessary to follow the product manual for accuracy. 1. Power input for host wiring: Supports AC 220V or DC 24V power supply. Choose one of them according to the wiring diagram. Sensor interface: - Downstream probe connected
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2. Terminal 3 (GND, DN -, DN+), usually only need to be connected to DN - and DN+(terminals 2 and 3) - Upstream probe connected
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5. Terminal 6 (GND, UP -, UP+), usually only need to be connected to UP - and UP+(terminals 5 and 6) 4-20mA output: AO terminal connected to signal positive pole, 24V - terminal connected to signal negative pole 485 communication: connect 485 OUT A and 485 OUT B terminals Heat meter function: - Water supply terminal connected to TX
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1. GND - Return terminal TX
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2. GND (supply and return GND are connected together) Relay output: Connect RELAY+and RELAY - terminals 2. Probe wiring Probe cables usually include shielded wires, signal positive (+) and signal negative (-) terminals. Conventional connections only require connecting the+and - terminals, and shielded wires can be omitted. Due to possible differences in terminal definitions and wiring methods among different manufacturers, please make sure to check the wiring diagram provided in the instruction manual before actual wiring.
Currently, well-known brands of steam flow meters are divided into two camps: domestic and international, covering different application scenarios of high, medium, and low-end. Suitable products can be selected according to working condition accuracy, temperature and pressure resistance requirements, and budget.
.1. Domestic Brands 1 Chongqing Qingtian Teke: Southwest flow meter leader, high-end substitute benchmark for domestic steam flow meters. The core products include vortex street, orifice plate, V-cone, ultrasonic flowmeter, etc., with an accuracy of ± 0.5% FS, temperature resistance of -40 ℃ to 350 ℃, and a maximum pressure resistance of 40MPa. Equipped with integrated temperature and pressure compensation to enhance anti vibration design, built-in intelligent signal processing chip, widely used in industries such as thermoelectric and chemical. Chongqing Chuanyi CYY: a leading and listed company in domestic automation instruments, participated in the formulation of national standards for steam flow meters. The core products are CVM series vortex flowmeter and differential pressure flowmeter, with a temperature resistance of 550 ℃ and a pressure resistance of 35MPa. 3. Xingao Technology: a representative of high cost-effectiveness of domestic steam flow meters, with full industry chain supporting and system integration capabilities, and dense after-sales network. The core product VFM series vortex flowmeter has an accuracy of ± 1.0% for saturated steam and ± 1.5% for superheated steam. It uses dual piezoelectric differential sensors and has strong anti vibration interference ability, solving the problem of small flow "wave loss". It is applied in multiple trade settlement scenarios.
4. Huizhong Instrument: Deeply cultivating ultrasonic flow measurement technology, it is a benchmark brand for anti-interference and corrosion resistance in China. The co
