Environmental measuring instrument - Ultrasonic open channel flowmeter

Environmental measuring instrument - Ultrasonic open channel flowmeterofPurpose:

Environmental measuring instrument - Ultrasonic open channel flowmeterUsed in conjunction with measuring weirs, it is mainly used to measure the flow rate of sewage discharge outlets of sewage plants, enterprises and institutions, and urban sewers. Due to the use of ultrasonic waves passing through the air, this instrument measures in a non-contact manner. Therefore, in the presence of contaminated and corrosive liquids, instruments have higher reliability than other forms of measurement. This instrument has data storage function. In addition to storing the flow records of this instrument, it can also be connected to the (4-20) mA signals of other instruments. The stored records can be viewed through the buttons on the instrument panel and transmitted via RS-485 remote communication.

Environmental measuring instrument - Ultrasonic open channel flowmeterStructure and external dimensions:

Main 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.

Environmental measuring instrument - Ultrasonic open channel flowmeterInstallation 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.

Environmental measuring instrument - Ultrasonic open channel flowmeter