Most sewage plants will use frequency converters, motors, centrifuges and other equipment with interference sources. These interference factors force the measurement of the ultrasonic level gauge around it to be non-standard. When the measurement is inaccurate, the workers on the scene are anxious. In order to allow the on-site staff to more accurately grasp the real-time height of the water level, the following solutions are summarized for everyone, so that you can easily solve the problem of ultrasonic liquid level electromagnetic interference.When there are two regular hillock-like bumps in the ultrasonic, this is obvious electromagnetic interference.Solution 1: Ground the wire first, grounding is required; (grounding requirements: please connect the grounding terminal separately to the real earth, such as a metal pipe with water, or insert it into an underground metal pole. Note: Do not follow The grounding wires of the electrical cabinet should be connected together and grounded separately. The paint or embroidery on the grounded metal pipe or metal pole needs to be scraped off.) It must also be noted that the meter must be powered separately.Integrated ultrasonic liquid level strong electromagnetic interferenceSolution 2: It is strong electromagnetic interference, and grounding can only shield a part of the interference. At this time, an anti-interference switching power supply is needed to power the instrument.Solution 3: If it is the interference from the signal, an isolator is needed.When cleaning the ultrasonic level gauge, first clean the transmitter pressure interface and pressure port. Avoid using brushes or metal tools that are too hard to avoid damaging the sensitive core and pressure interface threads. When the ultrasonic transducer is aimed at the bottom of the tank or the inclined wall of the discharge port, the ultrasonic pulse is emitted, but the echo is not received, the detector will send an alarm or adjust to the maximum, and the interference echo is used as the level The danger of echo reception.It uses intelligent software to effectively identify true and false echoes, which can satisfy many contact-type applications that cannot be measured; it is not affected by the agitator, and the unique echo processing function ensures that the agitator and other liquid surface surges are severe or large It can still work reliably and provide undisturbed readings in the foaming situation; the installation is simple and the operation is convenient. Under the same measuring range, the D value of the level gauge is small, and the measuring blind zone is short; the combined environment temperature range is wide -40～+95C, and with automatic temperature compensation; the function is reliable and maintenance-free.
Post time: 21-09-21