The application notes of ultrasonic flowmeter in the pharmaceutical industry are as follows: Selection: precision adaptation: The pharmaceutical industry has high requirements for the accuracy of flow measurement, especially in the drug production process, the ratio of raw materials, the addition of pharmaceutical liquid and other links need accurate flow control. Therefore, the ultrasonic flowmeter with the right accuracy should be selected according to the specific application scenario and measurement requirements, in general, the accuracy should be at least ±1% or higher. Health requirements: The pharmaceutical process has strict requirements for health standards, so it is necessary to choose ultrasonic flowmeters that meet health standards. The part of the flow meter in contact with the fluid should be made of materials that are easy to clean, disinfect and not easy to breed bacteria, such as 316L stainless steel, etc., and the surface should be smooth, without dead corners, to avoid bacterial residues and cross-contamination. Range selection: Fully consider the flow range that may occur in the pharmaceutical production process, and choose a flowmeter with a suitable range. It is necessary to ensure that it can be accurately measured in the case of small flow, such as in some trace pharmaceutical addition links; It should also be able to meet the measurement needs of large flow, such as in the pharmaceutical water transmission pipeline. Installation: Straight pipe section requirements: The installation position should ensure that there are enough upstream and downstream straight pipe sections to ensure stable fluid flow. Generally, the upstream straight pipe section should be greater than or equal to 10 times the diameter of the pipe, and the downstream straight pipe section should be greater than 5 times the diameter of the pipe, which can reduce the influence of whirlpool and turbulence on the measurement results. Avoid interference sources: Avoid installing sensors in places with strong magnetic fields and vibration interference, such as water pumps and high-power frequency conversion devices. These interference sources may affect the transmission of ultrasonic signals and the accuracy of measurement. The upstream of the installation point should be more than 30 times the diameter of the pipe from the interference source such as the water pump. Sensor installation position: The installation position of the sensor should be selected on the side of the pipe, avoid installation at the bottom or top of the pipe, because there may be precipitated substances at the bottom to affect the measurement, and there may be bubbles at the top to affect the measurement result. At the same time, it is necessary to ensure that the sensor is firmly installed and the connection between the pipe is tight to prevent loosening leading to measurement errors. Check the condition of the pipeline: check the condition of the pipeline before installation to ensure that the inner wall of the pipeline is smooth, no rust, no scale and so on. If there is a rust layer or dirt layer on the inner wall of the pipeline, it will affect the propagation speed of the ultrasonic wave, thus affecting the measurement accuracy. For seriously rusted pipes, rust removal should be carried out first; The pipes with dirt should be cleaned. The use of the environment: temperature and humidity control: the environmental temperature and humidity of the pharmaceutical workshop may have greater changes, and the electronic parts of the ultrasonic flowmeter have certain requirements for temperature and humidity. To avoid prolonged exposure to extreme temperature or humidity conditions, the flow meter should be installed in an area where the temperature and humidity are relatively stable. If the ambient temperature is too high or too low, it may affect the performance and service life of the flowmeter. Avoid direct sunlight: The case and sensor of the ultrasonic flow meter may be affected by direct sunlight and age or damage, so you should avoid installing the flow meter in direct sunlight. If it cannot be avoided, sunshade measures can be taken, such as the installation of a sunshade. Maintenance: Regular calibration: In order to ensure the measurement accuracy and stability of the ultrasonic flowmeter, it is necessary to calibrate it regularly. The frequency of calibration should be determined according to the use of the flowmeter and the accuracy requirements, and it is generally recommended to calibrate at least once a year. In the calibration process, the standard flow device should be used for comparative testing, and the parameters of the flowmeter should be adjusted according to the test results. Cleaning and inspection: Regularly clean the sensor of the flow meter to remove dirt and impurities on the surface to ensure the normal transmission of ultrasonic signals. At the same time, it is necessary to check whether the coupling agent between the sensor and the pipeline is sufficient, and if there is a lack, it should be supplemented in time. Troubleshooting: In the process of use, if the measurement results of the flowmeter are found to be abnormal, it should be troubleshooting in time. First check whether the installation position of the flow meter is correct, whether the sensor is loose, whether there is foreign matter in the pipeline, and then check whether the electronic parts of the flow meter are working normally. If you cannot solve the fault by yourself, contact the manufacturer or professional maintenance personnel in time for maintenance. Data management: Data recording and analysis: record and analyze the data measured by the ultrasonic flowmeter, which helps to find the problems and anomalies in the production process in time. It is possible to establish a data monitoring system, collect and store flowmeter data in real time, and process and analyze the data through data analysis software in order to better grasp the flow changes in the production process. Data security: Data security in the pharmaceutical industry is very important, so it is important to ensure that the data transmission and storage of flowmeters are secure and reliable. Measures such as encryption technology and backup technology can be adopted to prevent data leakage and loss.
Post time: Nov-03-2024