Portable ultrasonic flowmeter

Products overview:
ZWS - 100 p seriesPortable ultrasonic flowmeterUse of low voltage, multiple pulse jet lag principle, adopt double balanced differential signal transceiver technology has nothing to do with hardware parameters design method;By choosing the advanced large scale integrated circuit and advanced SMD SMT soldering process.To ensure that each factory flowmeter has the same performance;Built-in one-piece intelligent printer can be real-time, timing, printing;Has the Chinese display, powerful function, good consistency, the operation is simple, easy to carry, the battery working time is long, etc.Suitable for all kinds of industrial site online calibration and checking.Equipped with a coupling agent, built-in data recorder, a pair of 5 m sensor cable, sensor fixed clamp, instrument box or a custom portable aluminum alloy high strength protective case.
Second, the working principle:
ZWS - 100 p seriesPortable ultrasonic flowmeterBy using the theory of measuring the ultrasonic transmission time in pipelines.Medium (liquid) flow velocity in the pipe, and a lag between the time of ultrasonic propagation along the downstream and upstream of medium with linear relationship.As long as measure the ultrasonic propagation time of downstream and upstream respectively, can be obtained on the basis of the linear relationship at various points along the pipeline route on the velocity of the instantaneous average flow velocity.In this way, the medium flow can be obtained by flow rate, pipe cross-sectional area and the Reynolds number.When ultrasound beam propagation in the liquid, the flow of the fluid produces small changes will make the travel time, and the propagation time of change is proportional to the liquid flow rate, which can calculate the flow rate of the liquid.
Applications:
ZWS - 100 p seriesPortable ultrasonic flowmeterHas high measurement precision, battery powered up to 25 hours, the operation is simple, built-in thermal one-piece printers etc, the products are widely used in petroleum chemical industry, metallurgy, electric power, water conservancy, heating, air conditioning billing, energy monitoring in industrial production, by the broad masses of the user's consistent high praise.
Four, the main features:
1, high precision measurement
Line we better than 0.55555%, the repeatability accuracy better than 0.2222%, measurement precision is better than + / - 1.01111%;
2, non-contact measurement
Ultrasonic flowmeter with magnetic sensor adsorbed on the outer wall of pipeline, can complete the flow measurement;
3, large measuring range
Choose different types of sensors, which can realize caliber DN15 - DN6000mm pipe flow measurement;
4, support Chinese menu in English
Different versions of the flowmeter, can support Chinese or English menu, convenient and quick;
5, charging power supply
Built-in high-capacity nickel-metal hydride rechargeable batteries, can support the flowmeter work continuously more than 20 hours;
6, the built-in printer
Instant screen printing can be realized, can also be timed print set up to more than 20 items of measurement results in advance;
7, built-in data recorder
In advance can be set up to more than 20 items of measurement results will be uploaded to the computer or network communication.
Five, the technical parameters:
1, the performance parameters:
Linearity of 0.5%；
Repetitive 0.2%;
Accuracy of value plus or minus 1%, velocity of > 0.2 m/s;
Response time 0-999 seconds, the user choose;
Velocity range + 32 m/s;
Measure the diameter of 15-6000 - mm;
Unit of measure meters, feet, cubic meters, liters, cubic feet, U.S. gallons, British gallons, oil drum,
The liquid barrel, the liquid barrel, the United States million gallons, users set unit;
Total seven, negative, net cumulative;
Kind of various liquid can sound conduction uniform liquid;
Need to unlock the lock security Settings, change the data;
According to 4 x 4 x 16 in English or Chinese;
Communications interface RS - 232 baud rate, 75-57600, at the same time compatible Fuji ultrasonic flowmeter, should also be compatible with other user's requirements.
2, the product:
Sensor standard M1 and other four are available;
Sensor cable standard is 5 m x 2, also can be extended for 10 m x 2;
The power section 3 AAA battery built-in Ni - H, sustainable work 12 hours every time charged, AC100-240 - v of 3, instruments:
Data record built-in data recorder, can record 2000 rows of data;
Manual cumulative seven, buttons can begin for calibration;
The shell material flame retardant ABS;
Shell size 200 x 90 x 30 mm;
Host weight 500 g (1.2 Ibs) including batteries.

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, preparation before use:
1, use the portable package provides special cable connection between a host and the probe, do not mix.
2, battery charging methods: good source with matching power plug lines to connect with the host, the host of the power switch to OFF position, will automatically start charging.When the host unit of the LED light, says it is recharged.When a host unit LED shining or dies, charging is complete.The battery takes about 2 hours.

Eight, 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;
Nine, 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, portable ultrasonic flow power: AC220V DC8 ~ 36 v or AC7 ~ 30 v.

Ten, 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.

Eleven, notable matters of installation:
1, the liquid must be full of pipes, find out and accurately input pipe diameter, material, wall thickness, the lining material and lining thickness pipe related parameters.
2, transducer, the straight pipe before and after when installation should at least meet the requirements of before 10 d after 5 d, avoid the pipe at the top and bottom, as far as possible in the horizontal position of the pipeline installation, or with a diameter of 45 °, pay attention to avoid weld.
3, according to the installation of the flowmeter calculated from installing a transducer, and comprehensive reference flowmeter signal intensity, measured the speed of sound value, signal quality parameters such as distance, installation, inspection, adjust the transducer installation location to the ideal position.If the meter measured velocity value and the actual sound velocity is more than + / - 6 m/s, flow meter measured flow value and the actual flow value also can appear difference.
4, flowmeter verification and calibration on different pipe diameter, will get different correction coefficient, even if the same host USES the same type of different transducer, will also get different correction coefficient.Therefore, using a single ultrasonic flow meter to measure the different pipe diameter was users, should be in accordance with the requirements of the national metrological verification procedures were on a regular basis.
Twelve, application considerations:
1, the flowmeter to prevent sun and rain.
2, carrying and instruments have to be careful, be careful not to make its strong impact and vibration, it is recommended to use portable box.
3, should try to choose a good environment to use, choose not too much dust and corrosive gas using the site.
4, to prevent the power cord is damaged, to avoid the risk of electric shock and fire.
5, should be timely close the instrument after using the power switch.
6, after each use, should be timely to recharge the battery.

13, shape size and connection:

14, optional sensors:

15, selection of coding:

Example: ZWS -100PS1M1X5.
Explanation: the portable ultrasonic flowmeter and the standard standard M1 sensors, equipped with standard S1 type sensor, signal cable 5 m x 2.

16, 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.