Large Fluctuations in Flow Meters | Analysis of Reasons for Large Diameter Intelligent Electromagnetic Flowmeters with Large Fluctuations in Flow Rates

『The flow meter fluctuates greatly』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. What should I do if the displayed value of the flowmeter fluctuates greatly?

First, check for non faulty fluctuations, and then deal with hardware or calibration issues specifically. Most of them can quickly solve the problem of inaccurate flowmeter. # # 1 First, confirm whether it is a non fault fluctuation. Often, large numerical fluctuations are not caused by damage to the flowmeter itself, but by external environmental factors. 1. Unstable medium flow: for example, there are air pockets in the pipeline, pump start stop fluctuations, and frequent valve opening and closing, which can cause significant fluctuations in instantaneous flow. You can observe whether there are abnormal noises or bubbles in the pipeline and try to stabilize the upstream feed/liquid pressure Improper installation position: The flowmeter is installed near the pump outlet, elbow, and valve, which may be affected by fluid disturbance. It is recommended to move it to a straight section of the pipeline and reserve at least 5 times the diameter of the pipe for installation Power supply/signal interference: If electromagnetic flow meters and turbine flow meters are close to strong electrical equipment or frequency converters, electromagnetic interference may occur, causing reading jumps. The shielded cables in Zhenshan can be replaced or signal isolators can be added Classify and troubleshoot hardware faults and calibrate # # # # 2.1 Mechanical flow meters (turbine, waist wheel, elliptical gear) 1 Cleaning the sensor chamber: Impurities and scaling in the medium can trap the impeller/rotor, causing abnormal fluctuations in speed. Disassemble the sensor and rinse it with clean water (explosion-proof type requires power off and proper prot

ection) Check the transmission components: Bearing wear and aging of seals can lead to increased clearance and jumping. Replace the corresponding faulty parts Re calibration: Use a standard volume tank for real flow calibration, adjust the instrument coefficient to correct the reading deviation ###### 2.2 Electromagnetic flowmeter 1 Cleaning the electrode: Stains and scales in the medium adhering to the electrode can cause abnormal sensing signals. Disassemble the sensor and lightly sand the surface of the electrode with sandpaper to remove the attachments Check grounding: Poor grounding can introduce interference. Re tighten the grounding bolt to ensure that the grounding resistance is ≤ 10 Ω 3 Zero point calibration: Close the upstream and downstream valves, fill the pipeline with static medium, enter the instrument menu to perform empty pipe zero point calibration, and correct the zero offset by 4 Adjusting excitation frequency: Some electromagnetic flow meters support adjusting excitation parameters to avoid the natural vibration frequency of the fluid and reduce fluctuations # # # 2.3 Ultrasonic flow meters 1 Cleaning the transducer: Scaling on the inner wall of the pipeline and stains on the surface of the transducer can affect sound wave transmission. After disassembly, wipe it clean and tidy with a soft cloth Calibration of Sound Velocity Parameter: Based on the current medium temperature and pressure, re-enter the accurate sound velocity calculation formula parameter 3 Adjust signal gain: If the signal strength is insufficient, increase the gain appropriately, but avoid introducing noise when the gain is too high If emergency temporary handling and professional assistance still cannot be resolved after self insp

Large Fluctuations in Flow Meters | Analysis of Reasons for Large Diameter Intelligent Electromagnetic Flowmeters with Large Fluctuations in Flow Rates

1. What should I do if the displayed value of the flowmeter fluctuates greatly?

『SILVER Official Website SERVICE』