Wall-mounted ultrasonic flowmeter

Products overview:
ZWS - 100 - f seriesWall-mounted ultrasonic flowmeterBased on imported technology as the core, adopts imported IC SMT, digital and integrated circuit is complete and improve the measuring accuracy and stability, greatly reducing the breakdown maintenance, is the current domestic advanced technology, stable performance, easy installation of a low power flow measurement instrumentation.
Ultrasonic flowmeter with multiple interfaces, such as 4-20 ma output current loop, current loop input, 485 digital communication interface, OCT frequency output, two way PT100 interface, can easily connected to the PLC and GPRS communication module, cable and wireless monitoring.
Main body don't have much difference between hardware and software, all kinds of ultrasonic flow meter different packaging format, a slightly different input/output port, the host can match topical type, plug-in, pipe sections of any other type of sensor.Topical type, insert type sensor without broken pipe flow online installation.
Second, the working principle:
ZWS - 100 - f seriesWall-mounted ultrasonic flowmeter using the low voltage, 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 - 100 - f seriesWall-mounted 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.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 reliability, high performance, good applicability, full display in Chinese.
2, day, month and year flow accumulation function, can record run 64 days before the operation, the first 64 months, the first five years of accumulated flow operation.
3, the power management function, can record, electricity and traffic on 64 times before, can be manually or automatically compensate to reduce flow losses.
4, effectively overcome the wall of the ultrasonic signal attenuation and the rough surface of the pipe to scattering of ultrasonic signal from surface reduce the energy consumption of ultrasonic signal.
5, improved flow measurement accuracy, especially suitable for pipe flow measurement.
6, unique disassembly with pressure, does not affect the normal production, at any time to complete the on-line replacement and maintenance.
Five, the technical parameters:
1, showed that 2 x 10 backlit LCD display, can switch display in both Chinese and English, but also show the instantaneous flow rate and the positive and negative, cumulative net flow rate, flow velocity, instantaneous heat and heat accumulation, work status, such as time data;
2, operation: touch 4 * 4 keyboard (operation) can be realized
3, signal input: 4-20 ma input, 3 road, can input pressure, liquid level, temperature and other analog signals;
2 way three-wire system PT100 platinum resistance input;
4, signal output: isolation type 4-20 ma, or 0-20 ma analog output;
Isolation net programmable OCT for positive and negative, cumulative pulse and various kinds of alarm signal;
Net relay used in positive and negative, cumulative pulse and various kinds of alarm signal output control;
Isolated RS - 485 data interface output, the output of isolated RS - 232 interface;
5, and other functions: automatic memory before 64 days, 64 months ago, the first five years of accumulated flow and working state;
Automatic memory before 64, electricity and traffic;
Fill the amount can be manual or automatic fill additional quantity function;
Programmable batch (quantitative) controller;
6, fault self-diagnosis function;
Expanding MODBUS protocol, FUJI agreement and compatible with the domestic similar products of other manufacturers communication protocol;
Access GPRS device can realize the wireless transmission, can see the scene at any time on computer in the office instrument parameters and work status;
7, protection grade: IP65;
8, explosion-proof grade: ExdIIBT4.
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:
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.
Eight, 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.
Nine, 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);
Ten, 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.
Eleven, working environment:
1, the temperature of the host: - 30 ℃ ~ 80 ℃;
2, temperature: - 40 ℃ ~ 160 ℃;
3, temperature: selected according to user's requirements;
4, host, humidity: 85% RH;
5, humidity: can work immersed depth of 3 m or less;
6, power supply: AC220V DC8 ~ 36 v or AC7 ~ 30 v.
Twelve, 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.
13, signal intensity:
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.

14, sensor installation steps:
1, choose to have enough length of straight pipe position, use the new pipelines, no rust, easy to operate.
2, clear the clutter and on the pipeline corrosion, using grinding Angle grinder abort rust.
The launch of 3, the sensor surface with plenty of coupling agent (such as butter, vaseline, etc.), besmear decoupling.
4, the purpose of the mixture is ruled out 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.

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.