Causes of errors in sewage electromagnetic flowmeters

Sewage electromagnetic flowmeter is an instrument commonly used to measure sewage flow. Certain errors may occur in actual use. The following will introduce the causes of errors in sewage electromagnetic flowmeters.

1. Changes in fluid properties

The composition of sewage is complex and contains a large amount of suspended matter and sediment. These substances will affect the conductivity of the fluid, thereby causing the electromagnetic flowmeter to error in the measurement results. In addition, physical properties such as temperature, density, and viscosity of sewage may also change with time and environmental changes, further increasing the possibility of errors.

2. Electromagnetic interference

Electromagnetic interference refers to instrument errors caused by electromagnetic fields. Common sources include high-voltage transmission lines, electronic equipment, motors, etc. These electromagnetic interferences will interfere with the signal transmission of the electromagnetic flowmeter, resulting in inaccurate measurement results.

3. Improper installation location

Electromagnetic flowmeters need to be installed on straight pipes and must meet a certain pipe length , diameter ratio and flow rate range and other conditions, otherwise it will affect the measurement accuracy. In addition, if the electromagnetic flowmeter is too close to other equipment, it will also be easily affected by factors such as vibration and pressure, causing errors.

4. Instrument damage or aging

Long-term use may cause aging and damage to the internal components of the electromagnetic flowmeter, including sensors, coils, chips, etc. Such damage or aging may lead to inaccurate measurement results. Therefore, regular inspection and maintenance of electromagnetic flowmeters is crucial to ensure their accuracy.

5. Other factors

In actual use, there may be other factors that cause errors in the sewage electromagnetic flowmeter, such as pipe leakage, pipe blockage, sudden changes in flow, etc. traffic fluctuations. In addition, factors such as the model, brand, and production process of the electromagnetic flowmeter may also affect its measurement accuracy.

In short, there are many reasons for errors in sewage electromagnetic flowmeters, which need to be analyzed and solved based on the actual situation. Through scientific and reasonable installation methods, regular maintenance, and appropriate calibration and debugging, the occurrence of errors can be effectively reduced and the accuracy of measurements can be improved.