Thread Content
The development of mass flow measurement technology has attracted widespread attention from countries around the world, which are all actively seeking solutions to it. The development of measurement technology for Emerson flowmeters focuses on two aspects: for multi-phase fluids, gases, corrosive fluids, fluids under high temperature and pressure, as well as those with large or very small flow rates, effective methods for measuring mass flow rate are necessary, so that the variety and specifications of mass flowmeters can meet the demands of industrial development. With the advancement of science and technology, new technologies such as microwaves, electromagnetics, nuclear technology, and microelectronics are being increasingly introduced into the field of mass flow measurement. Sensor technologies that enable highly accurate measurement of mass flow without contact or obstruction to the fluid flow are gradually maturing. The manufacturing of secondary instruments for Emerson flowmeters will become increasingly electronic, digital, and intelligent, and will rely more and more on control and management networks centered around fieldbus technology. These will open up new fields for mass flow measurement technology. New types of mass flow meters should feature a wide range of applications, high sensitivity, a broad measurement range, good stability, high accuracy levels, reliability, low cost, and ease of maintenance. Edit image search: Please click to enter an image description. Standard flow meters must meet the requirements for the calibration of mass flow rate. As production technology improves, the accuracy levels of various types of mass flow meters are also increasing continuously, which requires that the accuracy levels of flow standard devices be able to meet these demands. Since the full calibration conditions and environment for testing mass flowmeters differ greatly from those under which they are used in practice, this leads to additional usage errors that reduce measurement accuracy. Therefore, developing on-site online calibration techniques for such mass flowmeters, as well as standard devices for on-site, real-fluid calibration of them, is the fundamental solution to this problem. With the development of China’s market economy, the importance of resource and energy conservation is receiving increasing attention; as a result, there is a growing demand to improve the accuracy of measuring various flow rates. Based on this, Emerson flowmeters will focus on the research and development of flowmeter measurement technologies, raising these technologies to a new level. The calibration of Coriolis mass flowmeters is generally carried out using flow standard devices, which can be divided into static and dynamic methods. Mass flow meters used for measuring liquid flow rates are typically calibrated using standard devices for liquid flow measurement. The methods include: 1. Static weighing (mass) method: Using a \"mass-based liquid flow standard device\" to measure the mass of liquid that enters the weighing container through the commutator over a specified time interval. 2. Static volume densitometry method: Using a \"volume-based standard device for liquid flow rate measurement,\" the volume of liquid that flows into a container of fixed volume through a commutator is measured over a certain time interval; simultaneously, the density of the medium being tested is determined. Quality flow rate is then calculated from these values. 3. Standard volumetric tube densitometer method: This is a method that uses a \"standard device for measuring liquid flow rate via volumetric tubes\"; during the measurement interval, the liquid flows directly into a container of fixed volume, namely a standard volumetric tube. At the same time, the density of the medium being measured is determined, and then mass flow rate is calculated. 4. Standard gauge method: This involves using a standard flow meter as a reference for direct comparison with the mass flow meter under test. Regardless of the verification method used, the accuracy of the verification system (i.e., the flow standard device) should be more than 1/3 of the basic error limit of the mass flow meter being tested.