Rotor flowmeter calibration | How to calibrate each rotor flowmeter when the measured medium and measurement conditions are different from the calibration state? _Hundred ..

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1. Maintenance and Calibration Methods for Rotameters After understanding the importance of rotameters in industrial measurement, daily maintenance and regular calibration are key to ensuring their long-term stable operation and accurate measurement. The relevant methods are summarized as follows. 1. Maintenance method 1.1 Appearance inspection: Regularly check whether the casing and glass tube (if any) of the flowmeter are damaged or cracked. Damaged glass tubes may cause medium leakage and need to be replaced in a timely manner. At the same time, check whether the connection is firm, whether there is looseness or leakage, and ensure good sealing. 1.2 Cleaning For flow meters measuring clean fluids, regularly wipe the glass tube with a clean and tidy soft cloth to maintain its transparency for observation. If the fluid contains impurities, internal sedimentation may affect accuracy. It is necessary to choose a suitable cleaning agent for internal cleaning according to the characteristics of the medium, and be careful to avoid damaging the components. 1.3 Rotor inspection: Observe whether there is wear, corrosion, or impurities adhering to the surface of the rotor. Wear and tear can cause inaccurate measurements, and replacement needs to be considered. Check whether the rotor runs smoothly and whether there is any jamming; Catching may be caused by foreign objects or friction with the pipe wall, and needs to be cleaned or adjusted. 1.4 Environmental maintenance: Ensure that the installation environment is dry, ventilated, and free from moisture and corrosive gases. If unavoidable, a protective cover can be added. At the same time, avoid severe vibrations and impacts to avoid affecting the internal structure and accuracy. 2. Calibration method: Accompany Qiaochun 2.1 Comparison method Calibration: Select a higher precision standard flowmeter and install it in series with the calibrated flowmeter. Let the fluid pass through at different flow rates and record the readings of both. After comparison, calculate the error. If it exceeds the range, adjust or maintain the width. 2.2 Weight method calibration allows the fluid to flow into a container of known weight through a flow meter, and records the flow meter reading and time. Measure the actual weight of the fluid in the container, calculate the actual volumetric flow rate based on the density, compare it with the reading to determine the error and calibrate it.

2.3 Volume method calibration uses a container with a known volume, allowing the fluid to flow in and recording the filling time and flow meter reading. Calculate the actual flow rate based on volume and time, and calibrate it after comparing it with the reading.

2. What to do if the indication of the rotary range hood flowmeter is inaccurate due to different media?

The rotary range hood flowmeter may have inaccurate indication due to different media, which can be solved by recalibrating, replacing the flowmeter, parameter compensation, or cleaning and maintenance.

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