Current position > News detail
『Metal tube flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Common faults and solutions of metal tube rotor flowmeter
The common faults and solutions of metal tube rotor flowmeter are as follows:
1. Large measurement error. Gas medium is affected by temperature and pressure. Reason: Gas density changes significantly with temperature and pressure, and uncompensation can lead to errors. Solution: Adopting temperature and pressure compensation function, real-time correction of flow value through sensors. Reason for loosening of moving parts: Long term use or pipeline vibration can cause displacement of magnetic steel, pointers, counterweights, and other components. Solution: Verify by manually pushing the pointer: Press the pointer to the RP position and check if the output is 4mA and if the flow display is 0%; Verify sequentially according to the scale, and adjust the position of the components if they do not match; Professional personnel are required to operate, otherwise it needs to be returned to the factory for calibration. Installation does not meet the requirements for vertical installation: inclination angle ≤ 20 °, no ferromagnetic objects within 100mm around; Horizontal installation: Tilt angle ≤ 20 °, away from valves, reducers, pump outlets, and turning points; Requirements for straight pipe section: the first 5D (D is the pipe diameter) and the last 250mm. The reason for the change in liquid medium density is that the calibrated medium density does not match the actual value, resulting in errors. Solution: Substitute the actual medium density into the formula to calculate the correction factor, and multiply it by the flow meter reading to obtain the true flow rate.
2. Slight pointer shaking Reason: Qi segment Qi medium fluctuation.
. Soluti
III. The pointer stops at a certain position and the rotor gets stuck. Reason: The valve opens too quickly, and the rotor impacts the stopper, causing deformation.
; The guide rod is not concentric with the stop ring. Solution: Remove the instrument panel and shape the deformation stopper; Check the concentricity between the guide rod and the stop ring, and after calibration, reinstall the rotor; Manually push the rotor to confirm that it is unobstructed up and down. Prevention: During installation, strictly maintain vertical or horizontal orientation to avoid tilting. 4. Other precautions: Regular maintenance: Check the wear of moving parts and replace aging parts during maintenance. Environmental interference: Avoid strong magnetic fields or vibration environments to prevent signal distortion. Calibration cycle: It is recommended to recalibrate every 1-2 years to ensure measurement accuracy. Through the above methods, common faults of metal tube rotor flow meters can be effectively solved, ensuring their stable operation.