Custom gas flow meter trader for industry

Electromagnetic flowmeter generally consists of four parts: measuring tube, excitation system, detection part, and transmission part.Considering the requirements of anti-corrosion, lining materials are generally added inside the measuring tube. The excitation methods of the electromagnetic flowmeter mainly include high-frequency excitation, low-frequency excitation, and pulse DC excitation. Due to the continuous development of industry, some manufacturers have adopted a new excitation method - dual-frequency excitation, which overcomes the shortcomings of high-frequency and low-frequency excitation, and has the characteristics of "not affected by flow noise", "fast response speed" and "high precision"."The detection part mainly includes the electrode and the interference adjustment part. Since the electrode is in direct contact with the measured medium, it must have strong corrosion resistance.The main function of the transmitter is to convert the sensor signal into a standard signal output (0~20mA, 4~20mA, 0~10KHz) proportional to the medium volume flow. And it must have high stability, precision and strong anti-interference ability.Main performance parameters and characteristics of electromagnetic flowmeterThere are no moving parts and bluffs in the measuring conduit, so there is no pressure loss, no mechanical inertia, and the response is very sensitive.The measurement range is wide, and the turndown ratio is generally 10:1 and can be up to 100:1. The flow rate can be extended to 0.3 ~ 10m/s. The flow range can be measured from tens of milliliters to hundreds of thousands of cubic meters per hour. Measuring pipe diameter can be from 2mm to 2000mm.It can measure the volume flow of liquids with certain conductivity, such as solid particles, suspended matter, or acid, alkali, and salt solutions; two-way measurement is also possible.E and Q are in a linear relationship, so the meter has a uniform scale, and the volume flow of the fluid has nothing to do with the physical properties of the medium (temperature, pressure, density, viscosity, etc.) and flow state, so the electromagnetic flowmeter only needs to be calibrated with water. To measure the volume flow of other conductive media without correction.Electromagnetic Flow MeterElectromagnetic flow meters are intended for fluid measurement in most industries including water, wastewater, food and beverage, pharmaceutical and chemical.There are two basic components of electromagnetic flow meter: 1) The Detector, which includes the flow tube, isolating liner and measuring electrodes, and 2) The Converter, which is the electronic device responsible for signal processing, flow calculation, display and output signals.The materials of construction of the wetted parts (liner and electrodes) should be appropriate for the specifications on the intended type of service. Review of the compatibilities consistent with the specifications is recommended.Our electromagnetic flow meters are factory tested and calibrated. A calibration certificate is included in the shipment of each meter.

The measurement principle of electromagnetic flowmeter is Faraday's law of electromagnetic induction. The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell. It is primarily used to measure volume flow in conductive liquids and slurries in closed pipes. Including acid, alkali, salt and other highly corrosive liquids. The product is widely used in petroleum, chemical industry, metallurgy, textile, food, pharmaceutical, papermaking and other industries as well as environmental protection, municipal management, water conservancy construction and other fields. There are two types of faults in the operation of the electromagnetic flowmeter: one is the fault of the instrument itself, that is, the fault caused by the damage of the instrument structure or components; the other is the fault caused by external reasons.Common failures of electromagnetic flowmeters—the instrument has no flow signal outputCause AnalysisThis kind of fault is more common in the process of use, and the reasons are generally:(1) the power supply of the instrument is not normal;(2) the cable connection is not normal;(3) the liquid flow condition does not meet the installation requirements;(4) The sensor parts are damaged or there is an adhesion layer on the inner wall of the measurement;(5) The converter components are damaged.Solutions(1) Confirm that the power supply has been connected, check whether the output voltage of each circuit board of the power supply circuit board is normal, or try to replace the entire power supply circuit board to judge whether it is good or bad.(2) Check whether the cable is in good condition and whether the connection is correct.(3) Check the direction of liquid flow and whether the liquid in the tube is full. For the electromagnetic flowmeter that can measure forward and reverse, if the direction is inconsistent, it can be measured, but the set display flow direction does not match the positive and negative directions, and must be corrected. If the workload of removing the sensor is heavy, the direction of the arrow on the sensor can also be changed and the symbol of the displayed instrument can be reset. The pipeline is not full of liquid, which is mainly caused by the improper installation position of the sensor. Measures should be taken during installation to avoid the liquid in the pipeline from being full.(4) Check whether the electrodes on the inner wall of the transmitter are covered with a liquid scab layer. For the measurement liquid that is easy to scab, it should be cleaned regularly.(5) If it is judged that the fault is caused by the damage of the converter components, just replace the damaged components.Common faults of electromagnetic flowmeter - output value fluctuationCause AnalysisMost of these faults are caused by the influence of the measurement medium or the external environment, and the fault can be eliminated by itself after the external interference is eliminated. In order to ensure the accuracy of the measurement, such failures cannot be ignored. In some production environments, due to the large vibration of the measuring pipe or liquid, the circuit board of the flowmeter will be loosened, which may also cause fluctuations in the output value.Solutions(1) Confirm whether it is the cause of the process operation, and the fluid does pulsate. At this time, the flowmeter only reflects the flow status truthfully, and the fault can be eliminated by itself after the pulsation ends.(2) Electromagnetic interference generated by external stray currents, etc. Check whether there are large electrical appliances or electric welding machines working in the operating environment of the instrument, and confirm that the instrument is grounded and the operating environment is good.(3) When the pipeline is not filled with liquid or the liquid contains air bubbles, both are caused by technological reasons. At this time, you can ask the technical personnel to confirm. After the liquid is full or the bubbles calm down, the output value can return to normal.(4) The circuit board of the transmitter is a plug-in structure. Due to the large vibration of the on-site measurement pipeline or liquid, the power board of the flowmeter often becomes loose. If it is loose, disassemble the flowmeter and fix the circuit board again.            Electromagnetic Flow MeterElectromagnetic flow meters are intended for fluid measurement in most industries including water, wastewater, food and beverage, pharmaceutical and chemical.There are two basic components of electromagnetic flow meter: 1) The Detector, which includes the flow tube, isolating liner and measuring electrodes, and 2) The Converter, which is the electronic device responsible for signal processing, flow calculation, display and output signals.The materials of construction of the wetted parts (liner and electrodes) should be appropriate for the specifications on the intended type of service. Review of the compatibilities consistent with the specifications is recommended.Our electromagnetic flow meters are factory tested and calibrated. A calibration certificate is included in the shipment of each meter.

Using the visualization method and the instrument method, use GS8 to check whether the resistance coil of the sensor, the insulation resistance between the signal lines, the grounding resistance and other items meet the pre-compliance standard, and whether the electromagnetic flowmeter converter meets the accuracy requirements regardless of zero point and output current. The specific detection method is:Measure the resistance value of the excitation coil to determine whether there is an inter-turn short circuit in the excitation coil (resistance between line numbers "7" and "8"), and the resistance value should be between 30 ohms and 170 ohms. If the resistance is the same as the factory record, the coil is considered good, and the magnetic field strength of the electromagnetic flowmeter sensor is not evaluated indirectly.Close the valve on the pipeline, when the electromagnetic flowmeter is full of liquid and the liquid does not flow, check the zero point of the whole machine. Make appropriate adjustments as needed.Check the insulation resistance of each core wire of the signal line and the excitation line, and check whether the shielding layer is intact.Use the GS8 calibrator to test the output current of the converter. When given zero flow, the output current should be: 4.00 mA; when given 100% flow, the output current should be: 20.00 mA. The error of the output current value should be better than 1.5%.Measure the insulation resistance of the excitation coil to the ground (measurement numbers "1" and "7" or "8") to determine whether the sensor is wet, and the resistance value should be greater than 20 megohms.Measure the contact resistance between the electrode and the liquid (measure the numbers "1" and "2" and "1" and "3"), and indirectly evaluate the general condition of the electrode and the surface of the lining layer. Whether the deposited layer is conductive or insulating if the electrode surface and backing layer are attached to the deposited layer. The resistance between them should be between 1 kohm and 1 megohm, and the resistance values of wire numbers "1" and "2" and "1" and "3" should be approximately symmetrical.Test the excitation current value (between converter terminals "7" and "8"), the positive and negative excitation currents should be within the specified range, about 137 (5%) mA.Electromagnetic flow meterElectromagnetic flow meters are intended for fluid measurement in most industries including water, wastewater, food and beverage, pharmaceutical and chemical.There are two basic components of electromagnetic flow meter: 1) The Detector, which includes the flow tube, isolating liner and measuring electrodes, and 2) The Converter, which is the electronic device responsible for signal processing, flow calculation, display and output signals.The materials of construction of the wetted parts (liner and electrodes) should be appropriate for the specifications on the intended type of service. Review of the compatibilities consistent with the specifications is recommended.Our electromagnetic flow meters are factory tested and calibrated. A calibration certificate is included in the shipment of each meter.

Labor Day is a common festival for working people all over the world. The list of winners of the 2023 "Tianjin Labor Award" was announced, and Tianjin Sure Instrument Co., Ltd. was on the list.2023 Tianjin Labor AwardPublicity list of recommended units (46)1. Tianjin Fifth Central Hospital2. Schlott Auto Parts (Tianjin) Co., Ltd.3. State Grid International Financial Leasing Co., Ltd.4. Tianjin Jinyu Medical Testing Laboratory Co., Ltd.5. Asymchem Pharmaceutical Group (Tianjin) Co., Ltd.6. Tianjin Rongcheng Products Group Co., Ltd.7. Petition Office of the People's Government of Heping District, Tianjin8. Tianjin Keyun MRT International Freight Forwarding Co., Ltd.9. Tianjin Experimental Kindergarten10. Tianjin Guifaxiang Eighteenth Street Mahua Food Co., Ltd.11. Tianjin Branch of China Overseas Property Management Co., Ltd.12. Tianjin Yumeijing Group Co., Ltd.13. Tianjin Sure Instrument Co., Ltd.The 2023 "Tianjin Labor Award" is organized by the Tianjin Federation of Trade Unions. This selection is based on strict review and checks. This award is not only an affirmation of Sure's "artisan spirit" all the time, but also an encouragement to all Sure employees!