What are the factors affecting the accuracy of liquid mass flowmeters

1. Installation stress Treatment method: a. When installing the liquid mass flowmeter, the installation specifications should be strictly followed. b. After the flowmeter is installed, call up the 'zero adjustment menu' with a handheld operator or on the transmitter interface and record the factory zero preset value. After zero adjustment, observe the zero point value at this time. An order of magnitude, if the difference between the two values ​​is large, it means that the installation stress is too large and should be reinstalled. 2. Vibration Treatment method: Avoid vibration interference. If it is unavoidable, isolation measures should be taken to isolate the liquid mass flowmeter from the vibration interference source. 3. The temperature change processing method: a. The influence of temperature on the metal elasticity of the flowmeter measuring tube can be solved by setting the temperature correction coefficient; Perform on-site zeroing of the mass flowmeter to minimize the impact. 4. Pressure change Treatment method: For oil products with large changes in transfer pressure and custody transfer, a pressure transmitter must be installed downstream of the flow meter to perform real-time pressure compensation in the form of software. 5. Electromagnetic interference Treatment method: The liquid mass flowmeter should be installed away from large transformers, motors and other equipment that generate large magnetic fields. 6. Treatment methods for gas contained in oil products: a. Improve the working conditions of oil products so that the bubbles contained in them are distributed as evenly as possible to meet the requirements of normal measurement of the flowmeter; b. Install an air eliminator upstream of the mass flowmeter to minimize Gas-liquid mixing phenomenon; c. Install in strict accordance with the installation specifications of the mass flowmeter: the flow tube for measuring the oil medium is installed downward. For oil products, mass flow meters used for the transfer of large quantities of oil products must be calibrated online and equipped with an online density meter

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