Flow meter

1. Abnormal Cumulative Flow in Mass Flow Meter Troubleshooting: A mass flow meter at a plant showed cumulative flow even when there was no process flow. Upon inspection, it was found that the supports at both ends of the sensor did not meet installation requirements. Specifically, the support distances were uneven, and the bottom of […]

Thermal mass flow meters, commonly used for measuring the mass flow rate of gases or small amounts of liquids, may experience significant fluctuations, leading to unstable readings that can impact process control. The causes of such fluctuations should be investigated from multiple aspects, including the properties of the medium, instrument installation, equipment parameters, and external

1. Issue: Display of the 8800D Saturated Steam Flowmeter Shows Low Readings Fault Diagnosis: This was a newly installed meter. Upon rechecking the settings, it was found that the flow measurement unit was set incorrectly— the range upper limit of 16,000 kg/h was mistakenly set to 16,000 m³/h. Fault Resolution: After correcting the range upper

A Practical Troubleshooting Case Study In industrial steam measurement systems, discrepancies between sub-meters and the main flow meter are not uncommon. One particularly confusing situation is when the branch flow meter shows a stable flow rate, while the main meter continuously indicates zero flow. Is this a sensor failure?A wiring problem?Or is the issue hidden

Abstract Small-signal cutoff is an essential technique in industrial flow measurement used to suppress erroneous readings caused by zero drift, noise, and non-ideal process conditions.Although the phenomenon is common across all flowmeter types, the mechanisms that generate small signals differ significantly depending on measurement principle, instrument quality, environmental factors, and installation conditions.Appropriate cutoff configuration therefore

Selecting the proper electrode and liner materials is critical to ensure accuracy, reliability, and long service life of electromagnetic flow meters.Material choices must be made according to fluid properties such as corrosion, abrasiveness, temperature, and pressure. 1. Electrode Material Selection Principles Electrodes are in direct contact with the process fluid and serve as the signal

Typical Ranges and Their Interrelationship** Electromagnetic flowmeters rely on three key electrical characteristics—coil resistance, electrode-to-ground insulation resistance, and electrode-to-electrode resistance—to ensure stable measurement and reliable performance.Although values vary among manufacturers and models, industry consensus ranges and their significance are well established. 1. Typical Resistance Ranges 1.1 Coil Resistance The excitation coil generates an alternating magnetic

Vortex flowmeters are widely used for measuring both liquid water and steam in industrial applications.Although the fundamental measuring principle remains the same, the physical properties of the media—such as density, viscosity, temperature, and pressure—lead to significant differences in installation requirements, compensation methods, and sensor selection. This article explains the common principles and key differences between

Mass flow meters, such as Coriolis mass flow meters, require calibration of the zero point and full scale to ensure measurement accuracy. This process eliminates zero drift and range deviations, ensuring optimal performance. Below are the detailed steps and key considerations for calibration. 1. Pre-calibration Preparations 1.1 Check Operating Conditions Correct Installation: Ensure the flow

Orifice plate flowmeters are widely used in industrial flow measurement due to their simple structure and standardized design. However, because the measurement principle is based on differential pressure, their performance is highly sensitive to installation conditions, process parameters, and impulse piping systems. In practical applications, most failures can be classified into two main categories: Abnormal