What is meant by small signal removal in magnetic inductive flowmeters

Project Overview

Small signal removal of magnetic inductive flowmeter refers to a processing method that removes or ignores small signals below a specific threshold in order to improve the accuracy of flow measurement. Specifically:

Small signals usually refer to tiny flow signals below the measuring range. These signals may be due to various reasons (such as small flow fluctuations in the pipeline, adhesion of insulators on the electrode surface, external interference, etc.) and may affect the accuracy and stability of the flow meter.

The purpose of small signal resection is to overcome these adverse effects and thereby improve the accuracy of flow measurement.

Setting of cutoff value:

The small signal cutoff value is generally determined as a percentage of the magnetic inductive flowmeter's range. This percentage value can be adjusted according to the actual situation to find the best resection point.

Generally speaking, the value range of small signal resection is around 1% to 5%. However, it should be noted that the cutoff value cannot be too small, otherwise it may lead to large data errors; at the same time, it cannot be too large, so as not to affect the accuracy of the measurement results.

Application examples:

For example, if the measured flow rate is 100m³/h and the cutoff value is set to 1%, then when the flow rate is less than 1m³/h, the flow meter displays: Zero; when the flow rate is greater than 1m³/h, the flow meter will display the flow rate.

In summary, small signal cutoff of magnetic inductive flowmeter is a technical means to improve measurement accuracy. Interference signals are eliminated by reasonably setting the cutoff value, thereby ensuring the reliability and accuracy of flow measurement. .