Ultrasonic flowmeter

Products overview:
ZWS - 100 seriesUltrasonic flowmeterThe measurement principle is the time difference method.Its high reliability is a product of 8 years of manufacturing experience and eclecticism, through the improvement of the improved;Is due to a new high performance integration components with advanced SMD SMT parts production line for mass production.40 picosecond resolution (40 x 10 seconds), the linearity of 0.5%.Principle of the low voltage pulse more, ensure reliable operation.Two way 0.1% accuracy of analog input, access to the temperature sensor current signal, namely into heat meter.Open mode design, implementation, according to Chinese software users can set all parameters,Hardware component parameter design has nothing to do, do not need to adjust to ensure that each meter has the same performance.Host machines are portable, wall hung, standard plate mounted, handheld, one-piece.Sensor has: convenient installation outside tied type of plug-in, reliable work, high reliable and high precision standard pipe sections, ultra high precision standard PI pipe sections.
Second, the working principle:
ZWS - 100 seriesThe ultrasonic flowmeter with low voltage, 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 - 100 seriesUltrasonic flowmeterIts 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.It is widely used in tap water, sewage treatment, heating system, petrochemical, power plants, mining, paper making, steel mills, air conditioning billing, etc.
1, drinking water, river water and sea water, underground water, cooling water, high temperature water and sewage;
2, lubricating oil, diesel oil, fuel oil;
3, chemical liquid.
4, other homogeneous fluid.
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, strong memory function
Automatic memory before 512, 128 month before, in the first 10 years of accumulated flow, automatic memory before 64 calls and interruption time and flow, automatic memory 32 days before the working state of the flow meter is normal;
3, large measuring range
Choose different types of sensors, which can realize caliber DN15 ~ DN6000mm pipe flow measurement;
4, high reliability
With low voltage, pulse emission circuit, measuring precision, service life and reliability greatly increased;
5, support Chinese and English menu
Can support Chinese or English menu, convenient and quick;
6, 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.
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 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, directions for use:
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.

Seven, host features:
1, the whole display in English or in Chinese;
2, compact structure, strong, international advanced die-casting aluminum casing;
3, weight 2.5 Kg;
4, power AC220V, DC24V amphibious.
Eight, the host performance:
1, the accuracy is better than 1%, the repeatability is 0.5%;
2, for 500 ms measurement cycle;
3, backlit LCD can display instantaneous flow and cumulative amount at the same time, the instantaneous heat and accumulative total quantity of heat, velocity, time and other data;
4, 4 ~ 20 ma output current, or 0 to 20 ma, such as impedance 0 ~ K, accuracy of 0.1%;
5, which can realize heat measurement or one dual purpose;
6, automatic recording, 64 month before, 64 days before the five years of accumulated flow;
7, automatically record before 64 calls and interruption time and flow rate, can be manually or automatically fill amount, reducing the loss of user traffic;
8, automatic record 64 days before the working state of the flow meter is normal;
9, the data interface to factory is configured to RS - 232, equipped with RS - 232 / RS - 485 converter can be turned into RS - 485.
Nine, special cable:
Models for SEYV75-2 block type, single can be extended to 500 meters, at the same time, pay attention not to parallel with high voltage cable, as far as possible to avoid the frequency converter.
Ten, pipes:
1, pipe: steel, stainless steel, cast iron, cement pipe, PVC, aluminum, copper, glass fiber reinforced plastic all quality of pipes, such as the lining is allowed
2, pipe inner: 15 mm to 6000 mm;
3, straight pipe sensor installation points must satisfy the 10 D, upstream downstream 5 D, 30 D to the pump discharge mean diameter (D);
Eleven, measuring medium:
1, type: tap water, sea water, industrial sewage, various oil, acid alkali, alcohol, beer can support such as ultrasonic single homogeneous liquid;
2, temperature: 0 ℃ ~ 160 ℃;
3, turbidity, 10000 PPM or less, and the bubble content is small;
4, velocity: 0 ~ + 30 m/s;
5, flow: positive and reverse bidirectional measurement, and can be measured net flows;
Twelve, working environment:
1, the temperature of the host: - 30 ℃ ~ 80 ℃;
2, flow sensor temperature: - 40 ℃ ~ 160 ℃;
3, temperature sensor temperature: selected according to user's requirements;
4, host, humidity: 85% RH;
5, flow sensor, humidity: can work immersed depth of 3 m or less;
6, power supply: AC220V DC8 ~ 36 v or AC7 ~ 30 v.
13, sensor installation steps:
1, choose to have enough length of straight pipe position, must be the new pipeline, no rust, easy to operate.
2, clear the clutter and on the pipeline corrosion, try using 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.

14, signal intensity:
Refers to the received signal strength after amplification of ultrasonic signal amplitude, with 3 digits said: [000] is not detected any signal;Z [999] refers to the received signal.
Although the signal between 500-999 meter can work, but the stronger signal strength can get better results, so users should adjust the signal of the sensor receives a to z.
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.

15, 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, small speed, big z z, 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.

16, 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.

The 17th and optional inserted into the sensor:

Insert type sensor is refers to the hole on the pipeline to be tested using special tools in online punching without shutdown, so direct contact with the sensor and measured medium so as to realize the flow measurement of an installation, the sensor has solved the outer bound type sensor in measuring scale thick line to receive the signal and measurement signal attenuation problem for a long time, has not stopped production installation, maintenance free, has nothing to do with the pipe diameter, pressure loss, etc.
Pipe material is carbon steel or stainless steel can be directly welded installation, for not directly welded pipe, such as cast iron, cement, glass fiber reinforced plastic, PVC pipe should be equipped with the factory production of special pipe hoop before installation, to prevent leaking, when you place an order, please provide accurate measured pipe diameter or circumference.

Eighteen, 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。

In the 19th, 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.