Introduction: The open channel flowmeter is based on the flow velocity-water level algorithm, and adopts advanced flow velocity measuring instruments and water level measuring instruments, thereby ensuring the accuracy of velocity measurement and calculation. The new intelligent flow system adopts the mathematical model of single-probe method or multi-probe method for open channel flow measurement according to the requirements of channel width and measurement accuracy. The microprocessor in the intelligent open channel flow system display instrument measures the actual water level based on the water level gauge and the installed channel geometry, slope coefficient, channel accuracy, hydraulic The vertical plane correction coefficient of the ramp and flow velocity calculates the flow rate of the channel according to the predetermined mathematical model. The working principle of the open channel flowmeter is to use the open channel technology to measure the fluid level, and then obtain the flow through the microprocessor inside the instrument. due to Contact measurement, open channel flowmeters can be used in harsh environments. Under the control of the computer, the open channel flowmeter transmits and receives the open channel, and calculates the clear channel according to the transmission time. The distance between the canal flowmeter and the measured liquid level can be used to obtain the liquid level height. Since there is a certain proportional relationship between the liquid level and the flow rate, it can be finally obtained according to the calculation formula. to the liquid flow Q. Features: 1. The measurement range is large, and the flow measurement is not affected by the return water on the tributary surface. 2. When measuring, it is not affected by the floating sediment, air bubbles and large changes in the water level. The flow sensor produces resistance to the water flow. The structure is simple, the volume is small, and the installation is convenient. 3. Standard channels can be installed directly without modification, and the installation and construction costs are low. 4. The instrument has complete display and output functions, which can display measurement data such as water level, flow rate, flow rate, and accumulated flow rate, and has an RS-485 communication interface. 5. With water level, mud level, flow rate over-limit alarm function. 6. It has the function of data saving, which can save the setting parameters and flow value in the case of long-term power failure. Technical parameter: Name: Ultrasonic bright beam flowmeter Structural form: split type (four-wire system) Maximum measurement range: 0.1~9999L/S Instrument display: Chinese and English display instantaneous flow, compact flow, liquid level, distance, current, echo curve Process temperature: -20~60℃ Process pressure: 0~0.3MPa/less than 2000 meters above sea level Accuracy: ranging 0.3%FS (under standard conditions) Flow: 1%~5% (depending on the type of weir plate) Blind spot: 0.35m Protection class: IP65 (host) IP67 (sensor) Process connection: G2" male flange connection Power supply: 15~36VDC/85~264VAC Signal output: 4~20mA load 500Ω Communication: RS485Modbus RTU protocol Cable interface: PG11/M20*1.5 Transmitter housing material: ABS plastic / die-casting aluminum alloy Sensor material: ABS plastic/ETFE plastic (anti-corrosion)
Introduction: The open channel flowmeter is based on the flow velocity-water level algorithm, and adopts advanced flow velocity measuring instruments and water level measuring instruments, thereby ensuring the accuracy of velocity measurement and calculation. The new intelligent flow system adopts the mathematical model of single-probe method or multi-probe method for open channel flow measurement according to the requirements of channel width and measurement accuracy. The microprocessor in the intelligent open channel flow system display instrument measures the actual water level based on the water level gauge and the installed channel geometry, slope coefficient, channel accuracy, hydraulic The vertical plane correction coefficient of the ramp and flow velocity calculates the flow rate of the channel according to the predetermined mathematical model. The working principle of the open channel flowmeter is to use the open channel technology to measure the fluid level, and then obtain the flow through the microprocessor inside the instrument. due to Contact measurement, open channel flowmeters can be used in harsh environments. Under the control of the computer, the open channel flowmeter transmits and receives the open channel, and calculates the clear channel according to the transmission time. The distance between the canal flowmeter and the measured liquid level can be used to obtain the liquid level height. Since there is a certain proportional relationship between the liquid level and the flow rate, it can be finally obtained according to the calculation formula. to the liquid flow Q.
