Principle of Babbitt flowmeter

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1. What are the technical parameters of flow meters used to measure the flow rate of a Babbitt tank? The mainstream equipment for measuring the flow rate of a Babbitt tank is a single probe open channel ultrasonic flow meter that is adapted to the specific parameters of the Babbitt tank. Its core technical parameters need to cover dimensions such as measurement accuracy, range adaptation, environmental adaptability, communication output, and installation calibration.

1. Measurement accuracy parameter 1 Liquid level measurement accuracy: Conventional products range from ± 1mm to ± 3mm, and high-precision models can reach ± 0.5mm. They must meet the Class II accuracy requirements of Wanghe GB/T 20721-2006 "Flow Meter for Open Channel Weir", with a corresponding flow measurement error of ≤± 2%. Flow calculation accuracy: Equipped with a dedicated flow calculation unit for the Babbitt trough, based on the fixed flow coefficient and index of the corresponding trough type, the flow measurement error can be controlled within ± 1.5% to ± 3%, meeting the measurement requirements of municipal water supply and drainage and sewage treatment.

II. Range Adaptation Parameters (1) Liquid Level Range 1 It is necessary to match the water depth at the throat of the balanced height chamber corresponding to the Babbitt tank, with a conventional range covering 0.1m~5m. The 0.1m~1m range is suitable for small laboratories or small sewage treatment tanks, and the 3m~5m range is suitable for large municipal channel Babbitt tanks. 2. It supports the upper limit warning function of liquid level indicator to avoid measurement data failure caused by channel overflow. （2） Flow range 1 Corresponding to different specifications of Bab

bitt troughs, the flow range covers 0.01m ³/h~10000m ³/h. For example, the 0.5m-wide No.1 standard Babbitt trough corresponds to a flow range of about 0.1~50m ³/h, and the 2m wide No.6 standard Babbitt trough corresponds to about 100~2000m ³/h. 2. It can quickly adapt to the 1-8 national unified standard Babbitt trough models through built-in parameter settings.

III. Environmental Adaptability Parameters 1 Working temperature: The conventional outdoor wall mounted model is -20 ℃~60 ℃, and the explosion-proof type can be adapted to flammable and explosive environments such as chemical and metallurgical plants at -40 ℃~70 ℃

2. Protection level: Outdoor installation needs to reach IP67 or above, and channel embedded installation needs to reach IP68 protection level

3. Anti interference performance: Built in dynamic filtering algorithm can offset the interference of debris, water flow bubbles, and water surface fluctuations in the channel on liquid level measurement.

IV. Signal and Power Supply Parameters 1 Analog output: Supports standard industrial signals of 4~20mA and 0~10V, and can be directly connected to industrial control systems such as PLC and SCADA

2. Digital communication: Supports communication protocols such as MODBUS-RTU, HART, 4G/NB IoT, etc., to meet remote data transmission and online monitoring needs

3. Power supply mode: Conventional power supply is AC220V or DC24V, low-power models can be matched with solar power supply systems, suitable for outdoor remote scenes without mains power.

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Fifth, Installation and Calibration Parameters 1 Installation form: External pasting without breaking the groove, directly pasted on the outer wall of the straight section of

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