Explosion proof ultrasonic flowmeter with stable performance

Explosion proof ultrasonic flowmeter has stable performance and is widely used in industrial and mining enterprises such as petroleum, chemical, power plants, metallurgy, mining, food, medicine, papermaking, steel, etc. It is also applied in energy-saving monitoring, flow network monitoring, etc.

1、 Instrument Introduction:

The explosion-proof ultrasonic flowmeter is made of imported integrated circuits, all of which are digitized and integrated to improve measurement accuracy, stability, and greatly reduce fault maintenance. It is currently a low-power flow measuring instrument with stable technology, performance, and easy installation in China. Based on years of experience and continuous product updates, the DS-100F ultrasonic flowmeter has powerful functions, fast computing speed, strong anti-interference ability, and up to 128 periodic sampling times. It is used for online measurement of various liquid flow rates in industrial sites.

2、 Working principle:

Explosion proof ultrasonic flowmeter is realized by using the principle of measuring the propagation time of ultrasonic waves in pipelines. There is a linear relationship between the flow velocity of the medium (liquid) in the pipeline and the time difference of ultrasound propagation along the medium in both forward and backward directions. As long as the propagation time of ultrasonic waves in both forward and backward directions is measured separately, the instantaneous average flow velocity at each point along the pipeline path can be obtained based on a linear relationship. In this way, the medium flow rate can be obtained through flow velocity, pipeline cross-sectional area, and Reynolds number.

When an ultrasonic beam propagates in a liquid, the flow of the fluid will cause a slight change in propagation time, and the change in propagation time is proportional to the flow velocity of the liquid, from which the flow velocity of the liquid can be calculated.

Explosion proof ultrasonic flowmeter with stable performance

3、 Application scope:

Explosion proof ultrasonic flow meters are widely used in industrial and mining enterprises such as petroleum, chemical, power plants, metallurgy, mining, food, medicine, papermaking, steel, etc., and are also applied in energy-saving monitoring, flow network monitoring, etc.

4、 Advantages:

1. High reliability, high performance, good applicability, fully displayed in Chinese.

2. The daily, monthly, and annual traffic accumulation function can record the cumulative traffic of the first 64 operating days, the first 64 operating months, and the first 5 operating years.

3. The power on/off management function can record the first 64 power on/off times and traffic, and can be manually or automatically compensated to reduce traffic loss.

4. Effectively overcoming the attenuation of ultrasonic signals by the pipe wall and the scattering of ultrasonic signals by rough surfaces inside the pipeline, reducing the energy consumption of ultrasonic signals from the surface.

5. Improved the accuracy of flow measurement, especially suitable for flow measurement in pipelines.

6. Disassemble under pressure without affecting normal production, and complete online replacement and maintenance at any time.

5Explosion proof ultrasonic flowmeter with stable performancePerformance indicators:

1. Measuring liquids: water, seawater, alkali and other monomers, turbidity less than 10000ppm, particle size less than 1mm;

2. Pipeline materials: full pipes made of steel, cast iron, PVC pipes, etc. that can be penetrated by ultrasonic waves, with dense texture, no severe corrosion or scaling, and allow for thin layer dense lining;

3. Pipe lining materials: rubber, epoxy asphalt, fiberglass, mortar, etc., or without lining;

4. Pipe diameter range: DN15mm~6000mm, the insertion sensor is suitable for pipes with a diameter of DN25mm~6000mm;

5. Flow velocity range: -32m/s~0~+32m/s, bidirectional flow;

6. Accuracy: ± 1.0% displayed value (under standard conditions). The accuracy of configuring plug-in sensors can reach 0.5%;

7. Linearity: 0.5%;

8. Signal output: 4-20mA or 0-20mA; RS-485；

9. Sensors: divided into external clip on and plug-in types. The standard configuration is external clip on. The plug-in sensor has a maximum working pressure of 3MPa;

10. Straight pipe length: upstream>10D, downstream>5D, distance from pump outlet>30D (D: pipe diameter);

11. Display mode: 2 * 20 character LCD display with LED backlight;

12. Protection level: IP65;

13. Explosion proof grade: Exd Ⅱ BT4;

14. Power supply: AC220V, DC8-36V or AC7-30V;

15. Environmental temperature/humidity: Host -20 ℃~+80 ℃; Sensors can be selected from -20 ℃ to+80 ℃ or -20 ℃ to+160 ℃, and can work in water with a depth of less than 2m.

6、 Pipeline:

1. Pipe materials: steel, stainless steel, cast iron, cement pipe, copper PVC、 All dense pipelines such as aluminum and fiberglass are allowed to have lining;

2. Tube inner diameter: 15mm~6000mm;

3. Straight pipe section: The sensor installation point must meet the requirements of upstream 10D, downstream 5D, and 30D from the pump outlet (D refers to the pipe diameter).

7、 Work environment:

1. Host temperature: -30 ℃~80 ℃;

2. Flow sensor temperature: -40 ℃~160 ℃;

3. Temperature sensor temperature: selected according to user needs;

4. Host humidity: 85% RH;

5. Humidity of flow sensor: capable of working in water with a depth of ≤ 3m;

6. Explosion proof ultrasonic flow power supply: AC220V or DC8-36V or AC7-30V.

8、 Cable:

The model is SEYV75-2 shielded type, and a single cable can be extended up to 500 meters. At the same time, be careful not to run parallel with high-voltage cables and try to avoid frequency converters.

9、 Measurement medium:

1. Types: Single and uniform liquids that can transmit ultrasonic waves, such as tap water, seawater, industrial wastewater, acidic and alkaline liquids, alcohol, beer, various oils, etc;

2. Temperature: 0 ℃~160 ℃;

3. Turbidity: ≤ 10000ppm, with low bubble content;

4. Flow velocity: 0~± 30m/s;

5. Flow direction: bidirectional measurement in both directions, and can measure net flow.

10、 Installation steps for sensors:

1. Choose a location with sufficient straight pipe length, which must be a new pipeline, rust free, and easy to operate place.

2. Remove debris and rust from the pipeline, and try to use a corner grinding machine to remove rust as much as possible.

3. Apply enough coupling agent (such as butter, Vaseline, etc.) on the emission surface of the sensor and apply coupling.

4. The purpose of the mixture is to eliminate air between the sensor emission surface and the outer surface of the pipeline.

5. Special reminder: Sand and debris should be avoided from entering this area.

6. There may be some bubbles remaining on the upper part of the inner wall of the horizontal pipeline. When installing on such a pipeline, it should be selected on the surface perpendicular to the side of the pipeline.

11、 Instructions for use:

1. Zero traffic check

When the liquid in the pipeline is stationary and there is no strong magnetic field interference or vibration around it, the meter head displays zero. At this time, the zero point is automatically set to eliminate zero drift. During operation, a small signal cutoff must be performed. Usually, if the flow rate is less than 5% of the full range flow rate, it will be automatically cutoff. At the same time, the zero point can also be adjusted through the menu.

2. Instrument panel keyboard operation

Before starting the instrument operation, it is necessary to set the parameters effectively, such as using unit system, installation method, pipeline diameter, pipeline wall thickness, pipeline material, pipeline roughness, fluid type, distance between two probes, flow rate unit, minimum speed, maximum speed, etc. All parameters must be entered correctly for the instrument to display the actual flow value correctly

3. Regular calibration of flow meters

To ensure the accuracy of the flow meter, we conduct regular calibration. Usually, we use higher precision portable flow meters for direct comparison and calculate using the measured data: error=measured value - standard value/standard value. By calculating the relative error and correction factor, the measurement error can reach ± 2% error to meet the measurement requirements. This operation is simple and convenient, and can effectively improve the accuracy of measurement.

12、 Selection Table:

Example: DS-TDS-100F2-200-M1-0-1-A-L5

Explanation: Explosion proof ultrasonic flowmeter with a diameter of DN200mm, standard M1 sensor as standard, no input, 4-20mA output, 220VAC power supply, signal cable of 5 meters x 2.

13、 Ordering Notice:

1. Product: If there are model standards, please call directly to inquire about prices and learn more details!

2. If there are no product model specifications, please send the operating requirements, design drawings, and technical specifications to our company.

3. Product ordering requires parameters such as diameter (DN), nominal pressure (MPa), temperature (℃), and connection method (flange, clamp, external attachment, insertion, etc.).

4. Quotation confirmation: Our company provides a quotation list and technical standard specifications to the customer for confirmation. After both parties confirm the technical aspects, the contract will be drafted.

5. Quality requirements, quality standards, and conditions for suppliers to be responsible for quality: in accordance with relevant national quality standards.

After-sales service

After-sales service

1. From the date of contract signing, our company provides free maintenance and upkeep services for the products provided, and promises lifelong repair services. 2. The company will regularly communicate with customers to understand the usage of the product and solve any problems that arise during customer use.

3. During the warranty period, if there is any man-made damage, our company is responsible for repairing it and charging the repair costs incurred.

4. If there are quality problems or dissatisfaction with the product, users can choose to return or exchange it unconditionally. The company does not charge any handling fees. If there are quality problems, the company will bear the round-trip shipping costs.