Current position > News detail
『Calibrate the rotor 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. Is the rotor flow meter installed horizontally or vertically?
The rotor flow meter is usually installed vertically. Requirement for Anmuhong installation: Conventional rotor flow meters must be installed vertically on vibration free pipelines to ensure measurement accuracy and stability. The fluid should flow through the flowmeter from bottom to top, so that the float can rise or fall correctly under the action of the fluid, indicating the flow rate. Working principle: The rotor flowmeter contains a conical tube and a float inside. The weight of the float has been calibrated to float in the fluid and move vertically with changes in flow rate. When the fluid flows through a conical tube, the float rises or falls under the force of the fluid, and there is a certain linear relationship between the position of the float and the flow rate. Therefore, by observing the position of the float, the flow rate of the fluid can be determined. Special circumstances: In certain special circumstances, such as space limitations or special requirements, it may be necessary to install flow meters horizontally. At this point, a specially designed rotor flowmeter should be selected to ensure the accuracy and stability of the measurement during horizontal installation. These specially designed flow meters may adopt different float shapes, weights, or installation methods to meet the requirements of horizontal installation. In summary, rotor flow meters are usually installed vertically. In special circumstances, if horizontal installation is required, a specially designed flow meter should be selected.
2. Common faults and solutions of metal tube rotor flowmeter
The common faults and solutions of metal tube rotor f
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.
. Solution to fuel leasing: Add damping devices (such as damping fluid or damping plates). Reason for moderate shaking: unstable