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What do you do when there’s a problem with the flow meter?

2020-08-06View Original

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Flow meters often experience problems, and you can resolve them by identifying the cause yourself. Below are some common solutions to problems; they should be able to address your immediate needs. I. Large fluctuations in flow rate: The reasons for such large fluctuations in flow rate can be considered from the following aspects: 1. Whether the water source is a pulsating flow. (1) Generally, when using a pump to draw in the raw material, if the installation location of the flow meter is close to the pump, pulsating flow is likely to occur, resulting in large fluctuations in flow rate. In this case, the solution is to increase the distance of the straight pipe between the pump and the flow meter in order to stabilize the flow rate. (2) The flow meter is installed too close to the valve or elbow, causing flow fluctuations as the material passes through those components. At this time, one should stay away from valves and elbows, ensuring that there are adequate straight sections of pipe ahead and behind. 2. Are there any sources of interference near the flow meter, such as motors, frequency converters, or high-voltage electrical devices? Solution: Ground the flow meter instrument, or add a filtering capacitor. If it cannot be resolved, one should stay away from the source of interference. II. Solutions to the issue of no flow display on the flow meter: (1) First, check for any problems with the wiring, such as loose signal wires or broken connections. (2) Separate the sensor from the signal amplifier, connect the signal amplifier to the instrument, and move an iron object back and forth at a distance of 2–3 mm from the bottom of the amplifier where the signal is taken. If the instrument displays a reading, it indicates that there is no problem with the display section. Please remove the flow sensor from the pipeline and check whether the impeller of the flow meter is tangled or damaged. III. If the flow meter indicates a low flow rate while the actual flow rate is high, the common causes of this problem are uneven rotation of the impeller or broken blades. Remove the flow meter from the pipeline and check whether it is tangled or damaged. IV. The flow meter exhibits a relatively large display error. (1) First, check whether the coefficient of the flow sensor, namely the K value, as well as other parameters of the instrument, are set correctly. (2) If the customer has the means, use an electronic scale for actual calibration. If the flow rate has poor repeatability or cannot be calibrated at all, you can contact the supplier. file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml6176\wps2.jpg Daily issues should be able to be resolved easily using the steps mentioned above. If you have any other questions or experiences you’d like to share, feel free to leave a comment. The editor will keep updating the content, so please stay tuned.
Reply #22020-08-10
Different types of flowmeters require different handling methods. The original poster listed the common faults of turbine flowmeters and their solutions, which is great; I hope similar lists can be provided for the common faults and solutions of other types of flowmeters as well.

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