Quantity measurement is a science to study the quantity change of matter, and the law of mass tautometry is the basic law of the development of the connection between things, so its measurement object is not limited to the traditional sense of pipeline liquid, where the need to master the quantity change there are flow measurement problems. Flow, pressure and temperature are listed as the three major detection parameters. For a certain fluid, as long as the three parameters are known, the energy can be calculated, and the three parameters must be detected in the measurement of energy conversion. Energy conversion is the basis of all production processes and scientific experiments, so flow and pressure, temperature meters are the most widely used.
In the flow meter selection, we often fall into such a misunderstanding.
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1
Blind superstitious import
A large proportion of people believe that imported ones are definitely the best. The author engaged in flow meters for more than 10 years of experience to prove that the domestic is the most cost-effective (except for the flow meter that cannot be produced in China); In addition to paying expensive money when purchasing their products, it is difficult to guarantee the after-sales service in the future (a small accessory has to let you wait for a month, and may have to pay dozens of times the domestic price).
2
What is expensive is good
There are two reasons why pictures are expensive in flow meters: one is the manufacturer's pricing method; The other is because the total amount of production is too small, and the income can only be increased by increasing the profit of a single unit.
3
Blind faith in a flowmeter manufacturer
Some people in the purchase of a manufacturer of a flow meter, that both sides have established a certain reputation, but they do not know that the flow meter is also a large family composed of nearly 100 kinds of products, no domestic flowmeter manufacturers dare to say that we can produce any flowmeter. This can be reflected in their price and future after-sales service.
4
Blind selection of new flowmeters
Don't be fooled by the manufacturer's salesman, they are often experimenting with you. Perhaps the verification before the factory is qualified, but is it reliable for long-term operation? Can you really meet your requirements? After all, the upgrade of the flow meter is not as fast as the mobile phone and TV, and the old one can stand the test of the market
5
Selection based on pipe only
This is the most likely situation, the result is often not to achieve the ideal measurement effect. It is not the quality of the flow meter itself, the flow meter is also a measuring instrument, it has its own measuring range.
6
Not selected according to the type of media
Although this situation is not a lot, but I have actually seen the use of vortex flowmeters to measure mud.
7
What kind of flow meter can measure
Some irresponsible manufacturers and salesmen will say to you that our flowmeter can measure anything, if you hear this sentence can "please" him out of your office, because he is talking nonsense to you!
8
Installation requirements are not met
For example, many flowmeters require sufficient straight front and rear pipe segments. Please read the instruction manual carefully before installing the flowmeter to avoid unnecessary trouble.
9
No parameters are set after installation
Most of the pictures will appear in the battery-powered flowmeter, the setting parameters are set by the manufacturer, and the installation can be used, which may cause great metering errors and unnecessary losses.
10
Maintenance is not performed on time
Irregular maintenance will cause a decline in the accuracy of the flow meter, so that the manufacturer can tell you how to maintain it, just like the car has to be sent to the after-sales service center for maintenance after a period of time.
Instrument selection | the top ten errors of flow meter selection
2024 07/29