Ultrasonic sewage open channel flowmeter

Ultrasonic sewage open channel flow meters are divided into ultrasonic open channel flow meters, Doppler open channel flow meters, and multi-channel open channel flow meters according to different measurement principles. They are all system monitoring devices for measuring fluid flow in open channels or channels. The open channel flowmeter monitoring system is suitable for measuring the flow of rectangular and trapezoidal open channels and culverts in reservoirs, rivers, water conservancy projects, urban water supply, sewage treatment, agricultural irrigation, water management and water resources. In recent years, it has been widely used.

　　Ultrasonic sewage open channel flowmeterMain technical indicators and parameters

1. Flow range: 0m ³/s to 10m ³/s (determined by the type and specifications of the measuring weir used)

2. Accumulated traffic: 8-bit decimal number, automatically returns to zero after accumulating 8 digits, recalculated

3. Accuracy: ± 5%

4. Distance measurement range: 0.4m to 2m (the blind zone is within 0.4m from the bottom of the probe, and the distance measurement range is within 0.4m to 2m)

5. Distance measurement accuracy: ± 3mm (calibrated within a range of 1m)

6. Liquid level resolution: 1mm

7. Working environment temperature: -20 ℃~55 ℃

8. Instrument protection level: Instrument display part: IP66 (the wire hole at the bottom of the instrument should be blocked); Probe part: IP68

9. Power supply:

AC power supply: (220V ± 22V) 6W

DC power supply: 12V-24V 300mA

When AC and DC (not greater than 24V) power supply coexist, the instrument uses AC power supply; AC power failure automatically connects to DC.

　　Ultrasonic sewage open channel flowmeter manufacturer

　　Installation of instruments

There are four hooks on the back of the instrument panel. When the instrument leaves the factory, it is equipped with two support plates with holes at both ends. Nail the support board to the wall and hang it on the wall using the hook on the back of the instrument panel.

An AC 220V three hole socket should be installed near the instrument, with the center hole grounded. Use the power plug on the instrument panel to connect and disconnect the power.

There are five PG9 wire holes under the instrument panel. It is possible to connect leads with an outer diameter of 4 to 6 inside the instrument. After inserting the wire, tighten the locking nut of the wire hole. Unused wire holes should also be plugged with a short wire and then tightened. Not allowing external gas to enter the interior of the instrument can extend its service life.

　　Ultrasonic sewage open channel flowmeter

Precautions

1. The accuracy level and function are selected by the user based on measurement requirements and usage scenarios, achieving cost-effectiveness. For example, in situations such as trade settlement, product handover, and energy measurement, Doppler open channel flow meters with high accuracy levels should be selected; For process control applications, choose different accuracy levels according to control requirements; In some cases where only flow detection is needed without precise control and measurement, ultrasonic open channel flow meters with slightly lower accuracy levels can be selected;

2. If you want to measure flow velocity indicators, you need to choose a Doppler open channel flowmeter or a multi-channel open channel flowmeter; If only measuring flow is selected, an ultrasonic open channel flowmeter can be used;

3. Fluid characteristics mainly refer to the pressure, temperature, density, viscosity, compressibility, etc. of gas. As the volume of gas varies with temperature and pressure, compensation and correction should be considered.

4. Instrument performance refers to the accuracy, repeatability, linearity, range ratio, pressure loss, initial flow rate, output signal, and response time of the instrument. When selecting a flowmeter, careful analysis and comparison of the above indicators should be carried out to select an instrument that can meet the flow requirements of the measuring medium.

5. The installation conditions refer to the flow direction of gas, the direction of the pipeline, the length and diameter of the upstream and downstream straight pipes, the spatial position, and the fittings, all of which will affect the accurate operation, maintenance, and service life of the gas flow meter.

6. Economic factors refer to purchase costs, installation costs, maintenance costs, calibration costs, and spare parts, which are also affected by the performance, reliability, and lifespan of gas flow meters

technical advantage

Open channel flow meters are different from other closed full pipe flow meters in that they are flow meters with free surface flow in non full pipe conditions or open channels. The open channel flowmeter based on the open channel principle is widely used in open channel flow measurement due to its low cost and simple operation.