With the improvement of people’s living standards, the amount of sewage is also increasing. This has caused a lot of trouble for the environmental protection department. In this case, water quality monitors play a big role. In order to ensure the reliability of sewage online monitoring equipment, it is necessary to eliminate its influencing factors in time. This chapter is going to understand with you that current and voltage have an impact on water quality online monitors. The details are as follows:

1.Electromagnetic induction: The high-power electrical appliances around the instrument generally appear loop current during operation, and the existence of this current will produce a relatively strong electromagnetic field, which will affect the water quality monitor, and the size of the current loop area will affect the instrument to varying degrees.

2.Electrostatic induction: When the physical point around the instrument changes, it will form a capacitor with the instrument, so that the water quality monitorpoint also changes, so that it will affect the reliability of the online monitor! Especially when the object and the wire together are in a parallel state, the reliability of the instrument is greatly affected.

3.Introduce interference through different points: there is a potential difference in the grounding of high-power instruments, which has an electrostatic coupling effect inside the equipment and affects the reliability of the instrument.

So What are the Measures to Eliminate the Reliability Interference Factors of Water Quality Monitors?

1.Suppression of series mode interference: In order to reduce the impact of the current loop on the reliability of water quality monitoring equipment, it is generally necessary to use the measure of signal wire twisting, in addition to avoid the influence of electric field, shielding measures should be used to prevent the induced current of the signal wire, and then by selecting the filter circuit to avoid the interference of DC signal;

2.Suppression of common mode interference: Once the water quality monitoring equipment has improper grounding measures, there will be a common mode interference problem, and the instrument can effectively improve the anti-interference ability of the ground insulation. There is also the grounding of its shielding layer can avoid affecting the reliability of the equipment!