The measurement of liquid flow velocity is an essential task in the production of a company, and the measurement of high-precision flow values ​​will help the company to increase its production efficiency. Therefore, the choice of flow meter should be carefully determined. Metal tube float flow meter is one of the devices used in flow measurement instruments because of its high precision and wide application range. However, during the use of metal tube float meters, its pointers are prone to problems. The following describes the causes of metal pipe floater flowmeter pointer failures and their solutions.
One, the pointer stops at a certain position
If the rotameter has stopped moving to a certain position during the measurement, it is likely that the rotor of the metal tube float meter is stuck. If the rotameter is used to open the valve too fast, the rotor will impact the stopper quickly, and the stopper deformation and the rotor jam will occur. In addition, the rotor guide rod is not concentric with the stop ring and may also cause the rotor to become stuck.
In order to avoid the stuck problem of the rotor, the installation must be installed vertically or horizontally, not tilted, to improve the measurement accuracy of the metal tube float flow meter. If the pointer stops at a fixed point, the meter can be removed, the deformed stopper removed, and checked for consistency with the guide bar. If not, correct it.
Second, the pointer jitter
1. The pointer is violently shaken - mainly caused by the pulsation of the medium, the pressure instability or the user's pressure, temperature, and flow rate of the gas operation state which are not in conformity with the actual state of the metal tube floater flowmeter;
2. The pointer is slightly dithered - usually due to medium fluctuations, damping should be increased at this time;
3. Pointer moderate jitter - This is due to the medium flow state, because the media operating pressure is unstable, this time can be used to solve the voltage regulator or steady flow device.
One, the pointer stops at a certain position
If the rotameter has stopped moving to a certain position during the measurement, it is likely that the rotor of the metal tube float meter is stuck. If the rotameter is used to open the valve too fast, the rotor will impact the stopper quickly, and the stopper deformation and the rotor jam will occur. In addition, the rotor guide rod is not concentric with the stop ring and may also cause the rotor to become stuck.
In order to avoid the stuck problem of the rotor, the installation must be installed vertically or horizontally, not tilted, to improve the measurement accuracy of the metal tube float flow meter. If the pointer stops at a fixed point, the meter can be removed, the deformed stopper removed, and checked for consistency with the guide bar. If not, correct it.
Second, the pointer jitter
1. The pointer is violently shaken - mainly caused by the pulsation of the medium, the pressure instability or the user's pressure, temperature, and flow rate of the gas operation state which are not in conformity with the actual state of the metal tube floater flowmeter;
2. The pointer is slightly dithered - usually due to medium fluctuations, damping should be increased at this time;
3. Pointer moderate jitter - This is due to the medium flow state, because the media operating pressure is unstable, this time can be used to solve the voltage regulator or steady flow device.
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