As a high precision total flow measuring instrument, it is widely used in trade measurement verification. In order to consider the precision of measurement verification, the following contents should be paid attention to when selecting the model.

(1) The fluid is specified to be relatively clean. The recommended fluids are: naphtha, butadiene, butadiene, high pressure polyethylene, compressed natural gas, gas, liquid oxygen, liquid nitrogen, carbon dioxide, etc.; chemical solutions: sodium hydroxide, salt water, ethanol, etc.; general fluids: water, gas, CO2, high pressure radon, etc.; organic chemical liquids: ethanol, medical ether, benzene, xylene, etc , butadiene, carbon tetrachloride, etc.

(2) When the liquid is used as the driving force of the flowmeter (plus the liquid uses its driving force to drive the mechanical equipment), the flowmeter type should select the liquid with high purity. If the liquid with low purity is selected, it will cause harm to the industrial equipment, and it is not conducive to the improvement of its service life. In addition, pay attention to the working pressure contained in it. When the working pressure in the flowmeter reaches a certain range, it can be more beneficial to its operation. In addition, the interference signal shall be opened at the same time.

(3) To select a suitable fluid, if the viscosity of the fluid is too high, it is not conducive to its normal operation. Therefore, the fluid with a smaller viscosity index should be selected. Generally, tap water is used as the fluid. In the application and recycling system, the calculation of the radial flow is more conducive to saving energy consumption. Therefore, the liquid concentration value should also prevent excessive viscosity. When the viscosity of the liquid is less than 5x10-8mm2 / s, it is not considered To the viscosity harm, otherwise effective measures should be taken to compensate for the harm of viscosity, such as reducing the application area, increasing the limit value under the total flow, instrument panel index sincere Reynolds coefficient, etc.

(4) In the whole process of inspection, the staff should also pay attention to the working condition of the flowmeter at all times to see whether the data information is correct. Therefore, they should also maintain and maintain the flowmeter regularly. Especially, if there is a product quality problem in the whole process of inspection, it will cause harm to the processing factory and the company. Especially in the industrial production, they can only measure, verify and count to a certain extent Only when the standard of industrial production is met, can the goods manufactured meet the requirements. If the data of measurement and verification is not monitored, it will cause harm to the goods. Therefore, it is necessary to check and test immediately to prevent serious harm.

(5) The rotation speed ratio is not suitable for too high in the operation of flowmeter. If the rotation speed ratio reaches the critical point, it is very easy to cause the destruction of flowmeter, which will cause the inertia of electronic devices and the destruction of experimental instruments. Therefore, it is necessary to set it in an effective range to improve the use time.