In order to make the coriolis mass flowmeter work normally, safely and with high performance, it is very important to install and use it correctly. This includes mechanical installation, electrical installation and maintenance.

(1) Installation

① The flow sensor should be installed on a solid foundation. A small-diameter mass flowmeter with an inner diameter of less than 10mm is installed on a balanced hard and vibration-free bottom surface, such as a wall, floor, or special foundation. If it is used in a high vibration environment, attention should be paid to the vibration absorption of the foundation, and the flexible pipe connection should be used between the sensor inlet and the pipeline; the larger-diameter flowmeter is directly installed on the process pipeline, and the flowmeter should be installed with a pipe clamp and a support Firmly fixed.

② In order to prevent the mutual influence between CMF, when multiple flowmeters are used in series or in parallel, the distance between each flow sensor should be far enough, and the tube clamp and support should be set on their own independent foundations.

③ In order to ensure that no residual value of gas or liquid will accumulate in the flow sensor during use, for the elbow-type flowmeter, the elbow should face down when measuring liquid, and the elbow should face upward when measuring gas. When measuring slurry or discharge liquid, the sensor should be installed in a vertical pipe with the flow direction from bottom to top. For the straight tube type flowmeter, it should be avoided to be installed on the point during horizontal installation to avoid the accumulation of air mass. When connecting the sensor and the process pipeline, the stress-free installation must be done, especially for the flow sensor of some straight-tube measuring tubes.

(2) Use and maintenance

① Zero point adjustment of the flowmeter. After the flow sensor is full of the measured fluid, close the downstream valve of the sensor, and adjust the zero point of the flowmeter under the condition close to the working temperature. When adjusting the zero point, it is very important to ensure that the downstream valve is completely closed to confirm that there is no leakage of fluid. If the valve leaks during zero adjustment, it will bring a great error to the entire measurement.

② Set flow and density calibration coefficients. It is very important to set the flow rate and density calibration coefficient flowmeter correctly. The flow calibration coefficient represents the sensitivity of the sensor and the temperature coefficient of flow, and the sensitivity represents how much flow is measured per microsecond time difference. (the unit is often g/s); the temperature coefficient of flow rate indicates the degree to which the elastic modulus of the sensor is affected by temperature. These are directly related to the measurement accuracy of the flowmeter. The density calibration coefficient represents the sensor's self-vibration period (the unit is often μs) and density temperature coefficient when the tube is air and the tube is water at 0℃. Obviously these are related to the measurement The accuracy of density is directly related.