Outer clamp type ultrasonic flowmeter

Products overview:
ZWS series - 100 f1Outer clamp type ultrasonic flowmeterIs imported, integrated circuit pasted on the circuit complete digitization, integration, and improve the measuring accuracy and stability, greatly reducing the breakdown maintenance, is the current domestic advanced technology, stable performance zui, easy installation of a low power flow measuring instrument, according to many years of experience, and constantly updated products, the new version of the ultrasonic flowmeter its powerful functions, operation speed, strong anti-interference ability, cycle sampling frequency up to 128 times, are widely used in industrial field of online measurement of various kinds of liquid flow rate.
Second, the working principle:
ZWS series - 100 f1Outside took advantage of the low voltage clamp type ultrasonic flowmeter, multiple pulse jet lag principle, the use of high precision and super stable double balance emission signal difference, difference receive digital detection technology to measure the direction of the downstream and upstream sound wave transmission time, according to calculate the velocity of jet lag.
When ultrasonic beam propagation in the liquid, the flow of the liquid produce small changes will make the travel time, the travel time is proportional to the liquid flow rate, the change of zero flow, two sensors in the time required to transmit and receive sound waves is exactly the same techniques for actual measurement of zero flow (*).Medium flow, the flow direction of sound wave transmission time is greater than in the direction of flow of sound wave transmission time.
Applications:
ZWS series - 100 f1Clip type ultrasonic flowmeter its powerful, fast computing speed, strong anti-jamming capability, cycle sampling frequency up to 128 times, are widely used in industrial field of online measurement of various kinds of liquid flow rate.It is widely used in tap water, sewage treatment, heating system, petrochemical, power plants, mining, paper making, steel mills, air conditioning billing, etc.
Four, the main features:
1, high precision measurement
Linearity is better than 0.5%, the repeatability accuracy better than 0.2%, measurement precision is better than that of + / - 1%;
2, large measuring range
Choose different types of sensors, which can realize caliber DN15 ~ DN6000mm pipe flow measurement;
3, support Chinese and English menu
Different versions of the flowmeter, can support Chinese or English menu, convenient and quick;
4, high reliability
With low voltage, pulse emission circuit, measuring accuracy, improve the service life and reliability
5, strong anti-interference ability;
Adopt double balanced differential signal transmitting and receiving circuit, effectively resist frequency converter, television tower, strong interference sources such as high tension line;
6, strong memory function
Automatic memory before 64, 64 month before, the first five years of accumulated flow, automatic memory before 64 calls and interruption time and flow, automatic memory before the 64 meter working condition is normal.

Five, the technical parameters:
1, measuring liquid: water, sea water, alkali and other single * body, turbidity is less than 10000 PPM, particle size less than 1 mm;
2, material: steel, cast iron, PVC pipe ultrasonic can penetrate the full package, such as dense texture, and no serious corrosion and scaling allows thin layer compact lining;
3, pipe lining material: rubber, epoxy asphalt, glass fiber reinforced plastic, mortar, etc., or without lining;
4, pipe diameter range: DN15mm to 6000 mm, inserted type sensor used by DN25mm ~ 6000 mm;
5, velocity range: - 32 m/s ~ 0 ~ + 32 m/s, two-way flow;
6, the accuracy of the quasi: display value plus or minus 1.0% (standard conditions).Configuration plug-in sensor accuracy can reach 0.5%;
7, linear degree: 0.5%;
8, signal output: 4-20 ma, or 0 to 20 ma, the RS - 485;
9, the sense organ, is divided into external clip-on and plug-in.Standard configuration for external clip-on.Insert type sensor zui high work pressure of 3 mpa;
10, straight long: upstream > 10 D, 5 D > downstream from pump discharge > 30 D (D: diameter);
11, the display mode: 2 * 20 characters LCD display, with LED backlight.
12, protection grade: IP65;
13, explosion-proof grade: Exd Ⅱ BT4;
14, the electric source: AC220V, DC8 or AC7 ~ 30 v ~ 36 v;
15, environment temperature/humidity: host - 20 ℃ ~ + 80 ℃;Sensors - 20 ℃ ~ + 80 ℃ or - 20 ℃ ~ + 160 ℃ is optional, the sensor can work of flooding, the water depth is less than 2 m.
Six, sensor installation steps:
1, choose to have enough length of straight pipe position, zui is a new pipeline, no rust, easy to operate.
2, clear the clutter and on the pipeline corrosion, zui good use grinding Angle grinder abort rust.
The launch of 3, on the sensor surface with plenty of coupling agent (such as butter, vaseline, etc.), besmear coupling 4, mixture rule out is the purpose of the sensor emission surface and air between the external surface of the pipe.
5, special remind: should avoid sａnd and debris into the middle.
6, horizontal pipe wall upside may remain some bubble, in the selection of pipe should be installed on the tangent to the pipe on the side of a vertical surface.
Seven, check the installation:
Users after installed sensors to inspection on the following items: receive signal strength and goodness of Q value, jet lag, estimates the liquid velocity and ratio of signal transmission time.Only in this way can flow meter and stable operation, accurate measurement.
Eight, signal strength:
Refers to the received signal strength after amplification of ultrasonic signal amplitude, with 3 digits said: [000] is not detected any signal;[999] zui refers to the received signal.
Although signal between 500-999 meter can work, but the stronger signal strength can get good results, so users should adjust the signal of the sensor to receive to zui.
Suggestions according to the following methods of operation to get larger signal strength:
1, if measured flow numerical instability, when signal strength is below 700, to choose a better location measurement.
2, the outer surface of the polishing pipe carefully, some slightly more coupling agent.
3, slightly adjust the relative position of the sensor at the same time observe the flow meter of received signal strength, parked in the signal zui big place, at the same time also want to check if the distance between the sensor can satisfy the demands of M25 window display.
Signal quality (signal good degrees) :
Flowmeter signal quality is to use Q value.Q value means the higher signal-to-noise ratio (SNR) of an acronym, of course, is more accurate, the measured data of the Q values should be between 600-900 range, the higher the better.
Nine, use notice:
1, zero flow rate checks
Around when the pipeline fluid static, without strong magnetic field interference, strong vibration, header shows zero, automatically set zero point at this time, eliminate the zero drift, the runtime must to remove small signal, usually 5% flow is less than the full process flow, automatic removal.Zero at the same time also can adjust menu.
2, instrument panel keyboard operation
Before start the meter running, the first to set parameters effectively, for example, using the system, installation, pipe diameter, pipe wall thickness, pipe material, pipe roughness, fluid type and the distance between two probes, velocity of flow unit, zui small speed, large zui, etc.All parameters input correctly, instrument can display correctly the actual flow value
3, flowmeter calibration
Guarantee the accuracy of flowmeter, we conduct regular check, usually we use higher precision direct comparison, portable flowmeter: using the test data to compute error = - standard/standard measurements, using relative error calculation, correction factor, satisfy error of measurement error of plus or minus 2%, can meet the measurement requirements.This simple and convenient operation, can effectively improve the accuracy of measuring.

Ten, optional tied outside sensors:

Outer bound type sensor is to bundle sensors directly on the outer surface of the pipeline under test so as to realize the flow measurement of an installation, has has nothing to do with the pipe diameter, installation is simple, no production, no pressure loss, etc.

Eleven, selection of coding:

Example:,ZWS-100F1-200-M1-0-1-A-L5；
Explanation: the pipe diameterDN200mm,The standard standardM1Sensors, no input,4-20mAThe output,220VACPower supply, signal cable5mX 2。

Twelve, design 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, 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.