company news about Antenna scarring The antenna is submerged Probe scaling and scarring

Antenna scarring ，The antenna is submerged ， Probe scaling and scarring

Radar level meter is a highly reliable, non-contact measuring instrument. It is precisely because of the characteristics of non-contact measurement that the instrument is not in direct contact with the measured medium. To a certain extent, the problem of inaccurate measurement or even impossible measurement caused by the pollution and corrosion of most plug-in instruments is avoided. Nevertheless, due to the precise and complex structure of the radar level meter, if it is operated improperly or lacks maintenance in application, it will also lead to frequent instrument failures and affect normal measurement. So, what are the common problems of radar level meter? What are the solutions?

Generally speaking, there are three common problems in the measurement of radar level meter:

1、 Antenna scar of radar level meter

Common problems: generally, the phenomenon of material hanging with low dielectric constant has no effect on the instrument measurement in dry state, but the phenomenon of material hanging with high dielectric constant often leads to inaccurate measurement results.

Solution: in view of this situation, it is recommended to use compressed air purging or clean water flushing to remove the hanging of materials. If the scarring is stubborn, use acid cleaning solution to clean the alkaline scarring dirt in time, but stop measuring the material level during the cleaning.

2、 The antenna of radar level meter is submerged

Common problems: the antenna of the radar level meter is easy to be submerged by materials, affecting the measurement effect and easily causing damage to the probe.

Solution: it is suggested to change the radar level meter to guided wave tube measurement, which can improve the measurement conditions and improve the measurement performance of the instrument.

The specific method is to install a guided wave tube type radar level meter at the original opening, and the guided wave tube is about 0.2m higher than the exhaust pipe. In this way, even if the slurry overflows from the exhaust pipe, the antenna of the level meter will not be submerged by the slurry, and the interference of the stirrer vortex and a large amount of steam emerging from the probe are avoided, reducing the damage to the probe. At the same time, because the guided wave tube has a good focusing effect, the received radar wave signal is stronger, Good measurement results have been obtained.

3、 The probe of radar level meter is scaling and scarring

Common problems: when the probe of the radar level meter is scaling or scarring, the electromagnetic wave signal of the radar level meter is blocked, which is easy to cause the radar level meter failure

Solution: it can be avoided by raising the installation position of the probe. If it cannot be improved due to the installation conditions, it should be solved by interlocking the measured value of the material level with the pump of the tank, specifically reducing the set value of the highest material level by about 0.5m. When the material level reaches the highest value, the feed pump can be stopped or the discharge pump can be started.

In addition to the failure of radar level meter caused by the blocking of the above electromagnetic wave signal, the normal measurement of radar level meter may also be affected by the medium form. For example, if there is foam on the surface of the tested material in actual working conditions, if it is dry foam or wet foam, the radar wave can reflect normally. However, if the foam is too thick and sticky, the measurement error may be large or it cannot be measured. If this is the case, the radar level meter does not have measurement advantages, and it is recommended to replace the measuring instrument.

Therefore, generally speaking, if the measurement data of the radar level meter is inaccurate, it can be basically judged that the cause of the fault is that the electromagnetic wave signal is blocked due to some influence and is not transmitted to the actual level surface. The instrument staff are responsible for timely handling the common faults of radar level meter, and are more obligated to pay attention to proper maintenance of the instrument at ordinary times, so as to ensure the normal and safe use of the instrument.