Portable doppler ultrasonic flowmeter

Products overview:
ZW - LDN - 1 - B seriesPortable doppler ultrasonic flowmeterIs a kind of high precision, non-contact measurement and ultrasonic flowmeter, adopts imported case of small size, strong function, easy to carry, easy to operate.Particularly applicable to flammable, explosive occasions, for liquid flow measurement test provides a great convenience.Rigid pipes such as steel mill, hard plastic, can be a variety of pipe diameter and wall thickness of the tube containing suspended solid particles or measure such as medium, is especially suitable for oil field and various industries in the production of various types of impurity liquid measuring and monitoring.Managers to analyze data provides a powerful tool.
Second, the working principle:
ZW - LDN - 1 - B seriesPortable doppler ultrasonic flowmeterThe principle is based on the sound wave doppler effect, the difference of doppler frequency detection.Ultrasonic generator is a fixed source, along with the fluid movement of solid particles with speed relative movement with the sound source, the solid particles can be the incidence of the ultrasonic reflected back to the receiver.The frequency of the incident waves and reflected waves between difference is due to the motion of the fluid solid particles in the sound wave doppler frequency shift.Because the difference frequency is proportional to the fluid velocity, velocity by measuring the frequency difference can be obtained, which fluid flow can be obtained.
Applications:
ZW - LDN - 1 - B seriesPortable doppler ultrasonic flowmeterIs mainly used in municipal sewage treatment plant, drainage pumping station in environmental detection and mining, oil, metallurgy, chemical industry, oil refining, paper making, food and other industries of circulating water, pulp, pulp, mud, acid alkali, chemical raw materials, water, urban drainage, industrial wastewater, sewage and oil/water mixture flow metering, etc.
Four, the main features:
1, dirty or pure liquid can be measured.The equivalent of a high precision of doppler ultrasonic flow meter and a high precision of time difference ultrasonic flowmeter.
2, non-contact flowmeter, external clip-on installation, do not need to stop flow or off line.
3, inverter resistance interference
4, very easy to solve the large diameter and thick wall, lining of cement and other couldn't solve the problems of the application of ultrasonic flowmeter.
5, built-in data recording function, can record 10 files, 65072 data points.
6, data playback, flowmeter with Microsoft Windows graphical interface style with special software, through the RS - 232 interface, can download data into the computer, the data to conduct a comprehensive analysis.Instantaneous flow - time curve waveform can be displayed visually, and along the time axis to arbitrary scaling, to analyze the data management personnel provides a powerful tool.
7, simplified Chinese and English bilingual window, suit the needs of different users.
8, built-in flowmeter calibration function, providing fast and convenient operation.
9, with year, month, day flow accumulation function, can record the first five years and this year, and 12 months before this month, the accumulation of 31 days before the day of traffic.
Five, the technical parameters:
1, the measured medium: slurry, sewage, grey water, beer, residual oil, soap,
2, output method: 4 ~ 20 ma, the load is less than 600 Ω industrial water, raw water, the river (including air bubbles, solid);
3, power supply voltage: AC200V (+ / - 20%), 50 hz.Particle content > 20 g/L) multiphase liquid;
4, ambient temperature: host: - 10 ℃ ~ + 45 ℃;
5, pipe material: metal, organic glass, UPVC plastic, etc.;
6, probe: normal temperature - 20 ℃ ~ + 60 ℃ high temperature 20 ℃ ~ + 120 ℃;
7, measuring diameter: 10 mm ~ 3000 mm.;
8, environment humidity: relative humidity of 85% or less;
9, medium speed: 0.04 m to 10.0 m/s;
10, cable length: standard length: portable 5 m;
11, the measuring accuracy: 2.0 (the field calibration is superior to the 1.5 level);
Six, using the environment:
1, installation method: SMT way;
2, special length: 20 m and 30 m and 40 m, 50 m and 60 m, 80, according to;
3, repeatability: 0.05%.
The host and the probe mounting point distance
1, the display mode: 2 x 16 LCD backlit display;
2, meter weight: (G) stationary 4 kg or less;
3, it can display flow, flow velocity, the total flow, etc.
(B) portable 4.5 kg or less
1, the keyboard type: touch 4 * 4 keyboard;
2, installation dimensions: (G) stationary 275 mm * 203 mm * 118 mm;
3, power-fail protection: power automatic protection, electricity automatic measurement;
(B) portable 340 mm * 210 mm * 235 mm;
1, the cumulative output: isolation, light emission, open collector output."USES the advanced method of doppler effect" measuring principle, the use of ultrasonic reflection when the medium to be a relative motion signal and transmitting frequency difference, circular tube of the liquid flow is obtained.
2, the equation is expressed as: Q for liquid flow coefficient K of flow in A pipe effective section C for ultrasonic beam and pipe axis Angle f1 for ultrasonic emission frequency delta f for frequency offset
3, ultrasonic flowmeter using tube outside the non-contact measurement, measurement process and piping liquid without any contact, so don't suffer from the liquid pressure, corrosion, pollution and so on many factors.
Seven, application note:
1, the basic considerations are carefully read the manufacturer's operating instructions.Early problem may be due to the ultrasonic flowmeter (at least not excluded), the user does not understａnd the importance of certain basic steps, such as transmitter on the pipe installed correctly.No matter what circumstances (such as pipe temperature sharp changes or abnormal vibration), all must keep pipeline related adjustment of acoustic coupling and transmitter.
2, using the doppler and shows the actual time difference flowmeter unit volume flow rate, the pipeline under test must have been full of fluid.However, if the two transmitters are installed in the pipe fluid below the surface, doppler flowmeter can continuous display section pipe filled with fluid flow velocity.
3, the vast majority of manufacturers are explained the instrument with the upstream and downstream of the valve, tee, zui small distance between pump and analogues.And is generally expressed in pipe diameter, usually upstream should be 10 to 20 diameter, 5 diameter downstream.
4, the function of the doppler flowmeter depends on the flow of liquid in the reflector.Therefore, in order to get reliable measurement data, must pay attention to the solid particles or the lower limit of concentration and size of bubbles.Addition, fluid velocity must be fast enough to ensure that the material in a state of suspension, manufacturers will provide a typical speed numerical code: such as solid state is 6 ft/s (1.8 m/s), and small bubbles of 2.5 ft/s (0.75 m/s).
Eight, realize the heat measurement:
The doppler ultrasonic flowmeter with three wire system PT100 or two wire PT1000 heat measurement can be realized, wiring method is as follows:
PT100 connection:
1, functional ultrasonic heat meter: external wiring can be identified reference junction box;Internal wiring circuit temperature sensor of water supply of the power supply side and signal and connected to the terminals TX1, T1.The power supply end of the return circuit temperature sensor and the signal side respectively connected to the terminals TX2, T2.Two resistors to end connected to the GND terminal blocks together.
2, split type ultrasonic heat meter: the power supply end of the water supply circuit temperature sensor and the signal side connected to the circuit board upper TX1, T1, the power supply end of the return circuit of temperature sensor and the signal side respectively connected to the terminals TX2, T2.Two resistors to end connected to the GND terminal together.
3, ultrasonic heat modules: water supply power supply side of the circuit temperature sensor and signal end connection in the above terminals TX1, T1;The power supply end of the return circuit temperature sensor and the signal side respectively connected to the terminals TX2, T2.Two resistors to end connected to the GND terminal together.
PT1000 connection:
1, the battery type ultrasonic heat meter: the power supply end of the water supply circuit temperature sensor and the signal side respectively connected to the circuit board on the upper right corner of the T1, GND, the power supply end of the return circuit of temperature sensor and the signal side respectively connected to the terminal T2, GND.
2, in the extension of the connection when the temperature sensor, as far as possible use of thicker wire, wire diameter and to ensure that all three wire connected to the temperature sensor is exactly the same with the same specifications of the wire.

Eight, the technical data table:

Nine, selection of coding (ZW - LDN - 1 - B)

Eleven,Design and selection and ordering information:

1, products: specify model standard, if any, please live in wei sales hotline advisory prices, details!

2, technical support, if not specified product specifications, please put the working condition of requirements, design drawings, technical specifications, fax or to us.

3, product orders for parameters: size (DN), nominal pressure (Mpa), temperature (℃), the connection way (flange, etc.) to the clamp.

4, offer confirmation: the company provide price list and technical standard specifications to customers to confirm, in the technical aspects to confirm before you draw up a contract.

5, quality requirements, quality standards, the supplier is responsible for the quality conditions: according to the relevant state quality standards.

After-sales service commitment:

1, from the date of signing of the contract, I in the way provided for products of the company offers free maintenance and maintenance service, commitment to lifelong maintenance service;

2, jiangsu wei measurement and control instrument co., LTD. Sales manager will be in regular contact with customers, understａnd the usage of products, and solve the problems of the customers to use in the process of produce, free of charge to provide technical support;

3 the man-made damage is found, the warranty period, our company is responsible for the maintenance, and the resulting maintenance fee;

4, product quality problems or are not satisfied with product, the user can choose unconditional return, wei tt&c don't charge any fees, appear quality problem, bear the freight back and forth.