Inaccurate output of the Supmea electromagnetic flowmeter may be due to insufficient pipe filling, low conductivity, zero point drift, improper installation, electromagnetic interference and improper selection.
The reasons for the inaccurate 4-20mA output display of the electromagnetic flowmeter may include the following points:
1. The liquid in the pipe is not full: If the liquid in the pipe is not full ,for example due to insufficient back pressure or improper installation position,may lead to measurement errors. In this case,the error may appear as a measured value greater than the actual value,or the output may slosh or overfill the pipe when the liquid is not full.
2. The liquid contains solid phase: If the liquid contains solid particles or fibers, it may cause slurry noise, contamination of the electrode surface, or even conductive deposition layer or insulating deposition layer covering the electrode, affecting the measurement. accuracy.
3. Liquid conductivity problem: If the liquid conductivity is close to the lower limit or exceeds the allowable range, may cause measurement shaking or failure to measure.
4. Sensor pollution: The sensor is easily affected by pollutants such as sediment and oil during use. Especially in corrosive fluid environments, these pollutants will affect the signal of the sensor. output, leading to inaccurate measurements.
5. Changes in fluid physical properties: Changes in the density, viscosity, conductivity and other physical properties of the fluid will affect the signal output of the sensor, especially in fluid systems with large changes, Such as sewage treatment, chemical production, etc., these changes may cause the electromagnetic flowmeter to fail.
6. Pipeline vibration: In piping systems with high flow rates and high pressures, pipeline vibration may affect the signal output characteristics of the sensor, thereby affecting the measurement results.
Zero-point drift: As time goes by, the electromagnetic flowmeter may have zero-point drift. This may be caused by sensor aging, environmental temperature changes, etc.
7. Improper installation position: If the flow meter is installed too close to the power supply or the installation angle is incorrect, it may be subject to electromagnetic interference or affect the accuracy of the measurement.
8. Changes in medium conditions: Changes in the temperature, density, viscosity and other physical properties of the measurement medium will also affect the measurement results.
9. Internal faults of the flow meter: Including sensor, electrode damage or aging, as well as wiring problems, calibration problems, etc.,all may lead to measurement errors.
10. Electromagnetic interference: Interference from external electromagnetic fields may affect the measurement accuracy of the flow meter.
11. Improper selection of flow meter: If the selection of flow meter does not match the actual application scenario, such as pipe diameter, flow range, etc., it will also lead to inaccurate measurement.
Hangzhou Economic Development Area，Hangzhou 310018，China
