1. Doppler method ultrasonic flowmeter manufacturer

2. What does vf qf mean?

In ultrasonic flowmeters, "VF" usually refers to the volumetric flow coefficient, and "QF" usually refers to the instantaneous volumetric flow rate, but the specific meaning needs to be explained by the equipment manufacturer. 1. Parameter definition VF (Volume Flow Coefficient): Volume flow coefficient, used to correct measurement deviations caused by pipeline conditions, fluid characteristics, and other factors, and improve the accuracy of volume flow measurement through coefficient calibration. QF (possibly Instantaneous Volume Flow): Instantaneous volume flow rate, which refers to the volume of fluid flowing through a pipeline per unit time (such as m ³/h, L/s), reflecting real-time flow status

2. Precautions - Different manufacturers (such as Siemens, Emerson, Fuji) may have different code definitions, and QF may also represent mass flow rate or other parameters in some equipment. -If accurate operation is required, please directly refer to the corresponding model manual or contact the manufacturers technical support to avoid misreading data. 3. Typical application scenarios - VF coefficient calibration is commonly used for non-standard pipelines or fluids with high viscosity (such as petroleum and chemical slurries). -QF monitoring is suitable for situations that require real-time flow control, such as water treatment and energy metering.

3. Wiring diagram for ultrasonic flowmeter

Ultrasonic flowmeter wiring is mainly divided into two parts: host wiring and probe wiring. There are differences between different brands and models, so it is necessary to follow the product manual for accuracy.

1.

2. Terminal 3 (GND, DN -, DN+), usually only need to be connected to DN - and DN+(terminals 2 and 3) - Upstream probe connected

4.

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

1. T

1. GND - Return terminal TX

2. T

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.

4. How much is an ultrasonic electromagnetic flowmeter?

The price range of ultrasonic electromagnetic flowmeters is large, and the core influencing factors include brand, specifications, functions, range and caliber. The specific price range ranges from 285 yuan to tens of thousands of yuan.

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