Home > Products > Electronics & Electricity > Electronic Instrument > Air & Gas Flowmeter

Ultrasonic Description:

When the ultrasonic beam propagation in the liquid, the liquid flow will produce small changes in the propagation time, and the variation of the propagation time is proportional to the liquid flow rate. HNVF-1000 ultrasonic flowmeter increases the dynamic and static clear function, higher precision corrected; uses balanced differential emission, balanced differential receiving circuit, anti-jamming performance and adaptation to improve performance has greatly improved, can be applied to high-power drive workplace; using the latest integrated circuits, circuit parameters are optimized, so the production process is more simple, and machine reliability and consistency of performance is more excellent; high-precision, high reliability, high performance, low price; can visual interface operation, easier and more reliable, and more functions, can be used for almost all industrial environments.

HNVF-1000 ultrasonic flowmeter

And transit-time ultrasonic flow meter into the Doppler method, this document describes the time difference is a new method - ultrasonic flowmeter

1 Works

When the ultrasonic beam propagation in the liquid, the liquid flow will produce small changes in the propagation time, and the change thereof is proportional to the propagation time of the liquid flow rate, which meet the following relationship expression:

[Formula] V = MD / sin2θ × ΔT / Tup · Tdown

among them:
θ is the beam angle with the direction of flow
M is the beam travels in straight lines in the number of liquid
D is the diameter of the pipe
Tup acoustic beam propagation time in a positive direction
Tdown acoustic beam propagation time in the reverse direction
ΔT = Tup -Tdown

2 HNVF-1000 ultrasonic flowmeter features
- Increase the dynamic and static clear function, higher precision after calibration;
- Use of balanced differential emission, balanced differential receiving circuit, anti-jamming performance and adaptation to improve performance has greatly improved, can be applied to high-power inverter workplace;
- Using the latest integrated circuits, circuit parameters are optimized, so the production process is more simple, and machine reliability and consistency of performance is more excellent.
- High accuracy, high reliability, high performance, low price
- Visual interface operation, easier and more reliable, and more functions, can be used for almost all industrial environments.
- Optimized intelligent signal processing applicable from the user without any adjustment circuit, making installation easier simple.
- You can use metric or imperial units, which flow can be used almost all popular domestic and foreign common units on the backlit LCD display with display select flow, flow rate, the cumulative amount of time and date.
- Day, month, year cumulative flow feature to record the first 64 days of operation, run the first 64 months, the first 5 years of cumulative flow run; on the power management function can record 64 times before the power on and off time.
- Portable meter with automatic charging machine power, can work for 8 hours. And equipped with an external DC power input socket.
- Complete include open collector output signal frequency of the signal output, 4 ~ 20mA current loop analog output. Machine with a multiplication factor (range) number seven long positive, negative and net flow and heat accumulator work independently, and through the open collector output circuit accumulated pulses.
- Two analog inputs can be input pressure, temperature, liquid level signal. Mating heat measurement temperature transmitter can be realized.
- The user selects the standard or user test calibration curve calibration curve speed due to the liquid flow profile changes caused by the Reynolds correction.
- Measurement technology, HNVF-1000 uses up to 0.2ns ultra-high resolution, high linearity, ultra-stable time measuring circuit, plus the machine using 32-bit digital processing procedures to ensure HNVF- 1000 than other types of flow meters has a higher resolution and measurement range.

3 Typical uses
Water, sewage, water
Water supply and drainage
Power plants (nuclear power, fire and water)
Heat, heating, heating
Metallurgy, mining
Petrochemical
Food and medicine
Hull Operation and Maintenance
Energy monitoring, water management
Paper and pulp
Leak Detection
Traffic patrol, with the flow - tracking and acquisition
Heat measurement, heat balance
Flow, thermal management, network monitoring system

4 Performance

Measure Mainframe

Measuring principle: Ultrasonic propagation time difference principle. Dual-CPU parallel, 4-byte floating-point operations. [Map]

Measurement period: 500ms. (2 times per second)
Display: 2X10 backlit characters or 2 * 20 character LCD display
Action: add 4 or 16 keys touch keyboard, and PC computer software provided parameters

enter:
3-way 4-20mA input accuracy of 0.1%. It can be input pressure, level, temperature and other signals.

Output:
Current signal: 4-20mA, impedance 600KW, floating, precision of 0.1%;
Frequency signal: Optional (OCT output) between 1-9999Hz;
Pulse signal: positive, negative and net flow and heat accumulated pulse, OCT output;
Alarm signals: Dual OCT output, nearly 20 kinds of optional source signals;
Data Interface: Isolated RS485 serial interface.

Other functions:

Traffic day, month, year cumulative function;
Regular print, data export functions;
Self-diagnostic function;
Remote network works;
Manual operation mode control signal.

Accuracy: Accuracy: 1.0%.
Flow rate range: 0.3-10m / s.

Acoustic system:

sensor:
Outer tie style: small standard S type, suitable for pipe diameter DN15 ~ DN100 mm;
Medium Type B standard for diameter DN50 ~ DN700 mm;
Large L-shaped standard for diameter DN300 ~ DN3000mm.
Plug-In: Any measuring pipe material (non-stop installation) suitable for diameter DN80 ~ DN2000mm above.
Standard pipe segment: for pipe diameters DN10-DN1000, the whole measurement accuracy ± 0.5%.

Cable length: can be extended to 300 M (greater lengths please contact the manufacturer).
Pipe lining material: steel, stainless steel, cast iron, hard plastic and all dense texture pipeline, allowing lining.
Inner diameter: 20mm-3000mm.
Straight pipe length: Upstream 310D, downstream 35D, from the pump outlet 330D. (Note: D is the pipe diameter)

Fluid type:

Category: water, sea water, acid and alkali liquid, food, oil, gasoline, kerosene and diesel oil, crude oil, alcohol, beer, liquid ultrasonic waves can spread evenly.
Turbidity: £ 20000ppM, and the bubble content is small.
Direction: respectively for forward and reverse flow measurement, and measurement of net traffic. (Measuring medium to ensure full pipe measurement)

working environment:

temperature:
Host: -10-80 ° C
Probe: £ 85 ° C (temperature probe: £ 150 ° C)

humidity:
Host: 85% RH
Probe: 98% RH (40 ° C), work can be flooded (3 m £).

power supply:
Fixed: AC220V, 24VDC;
Portable: the machine automatically rechargeable battery can work continuously for 20 hours; external AC220V, 5VA AC power.
Working time:

If unknown, please contact customer service