overview

JD-900V seriesVelocity area open channel flowmeterIt is an instrument used to measure the flow rate of liquid in channels with non full pipes and open discharges. It can be widely applied in industries such as chemical, power, metallurgy, mining, and water conservancy. Production and testing standards are based on national standards《velocity-type flowmeter》Verification regulation JJG198-1994.

◆ answer Use ◆ particular Point it

There are no special requirements for the cross-sectional shape and size of urban water supply channels.

Sewage treatment inflow and discharge channels can be installed and maintained without stopping water supply.

● Chemical liquid and wastewater discharge channels in industrial and mining enterprises ● Non obstructive flow, no head loss.

● Channels for water conservancy engineering and agricultural irrigation ● When the cross-section of the channel is large, multi-channel velocity measurement is used to achieve high-precision measurement.

● Flood discharge gate flow measurement ● It can measure the flow and velocity in both forward and reverse directions.

● Large measurement range and high accuracy.

● Can be used in trough weir or other waysOpen channel flowmeterCalibration equipment.

◆ Working principle

Using the ultrasonic velocity difference method (the velocity difference caused by the propagation of ultrasonic waves in the direction of liquid flow and in the opposite direction) to measure the average flow velocity V of the liquid, and the level gauge to measure the depth H of the liquid level, when the cross-sectional shape and size of the channel are determined, the liquid flow rate Q in the channel can be calculated. Q=V × H × S (H), where S (H) is the functional relationship between liquid level depth and water flow cross-sectional area.

By transmitting and receiving ultrasonic signals, the liquid flow velocity is measured using the principle of ultrasonic velocity difference method.

Receive signals from the liquid level gauge and calculate the liquid level depth based on the set liquid level range.

Calculate the instantaneous flow rate and cumulative flow rate of the liquid based on the cross-sectional shape and size of the channel set in the menu

● Chinese display and Chinese operation menu

● Data recording and storage

Before being searchable720Hours ago365Oh my god, before36Monthly and ten-year traffic data.

● signal output

4～20mA,Accumulated quantity pulse,RS-485, can be connected (or embedded)GSM/GPRSThe module enables wireless data transmission and can be paired with printingMachine.

● Ultrasonic velocity sensor

Ultrasonic velocity sensorIt is a device that realizes the mutual conversion of sound and electricity. When stimulated by electrical pulses, sound waves are generated, and when stimulated by sound waves, an electrical signal is output. Single channel has two sensors, dual channel has four sensors, and triple channel has six sensors. The sensor is fixed on the bracket and immersed in water. Our company's ceramic moldsUltrasonic velocity sensorIt is resistant to friction, corrosion, and has a long service life. It can work in water for a long time.

● Liquid level meter

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The liquid level is measured using ultrasonic echo ranging method, and this liquid level gauge is an intelligent non-contact liquid level measuring instrument. Equipped with automatic power adjustment, gain control, temperature compensation, advanced detection and calculation techniques to improve the measurement accuracy of the instrument, and suppression of interference echoes to ensure the authenticity of measurement results. The liquid level gauge is fixedly installed above the channel water level observation point.Probe the head and aim it vertically at the water surface.

power supply: DC24V

output: four～20mA(four-wire system)、RS485

range: 0～2m, 0～5m，0～10m，0～15m

control:Two way relay

accuracy: 0.25%

ambient temperature:- 25℃～-55℃

protection grade: IP67

resolution: 1mm

Display mode: sixteenposition×2 LCDBacklight

Installation hole size68mm

Shell material: high-strength engineering nylon（PA6 GF30）

Measurement range: 0～2m，0～5m，0～10m， 0～100m(Cable type)

Accuracy level:0.5%

Medium temperature:-10℃～70℃

Power supply levelDC 16～32V

Signal output: 4～20mA(Two wire system)

Protection level:IP68

Shell material: stainless steel

Ultrasonic level gaugeNot in contact with the tested liquid, suitable for measuring sewage and corrosive liquids. The static pressure level gauge is immersed in the measured liquid and is suitable for measuring water quality with relatively pure solid particles.

◆Selection code