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The 76-81GHz radar level transmitter from SKE is a device that uses high-frequency radar technology to measure liquid levels. It has the feature of high accuracy and suitability for complex environments. However, we may also encounter some common faults in actual use. Usually, we can troubleshoot by checking the following aspects:
1，Check whether the power supply is normal or not?
In real work site, when you find that the radar level sensor changes very slowly or does not change at all after the liquid level rises to a certain value, firstly, you need to check whether the fuse of the equipment is burned out. If there is no current output, it can basically be determined that there is a problem with the instrument and it should be replaced or repaired accordingly.
2. Check whether the Communications equipment is normal or not?
Once you find the communication equipment is abnormal, you can install the radar debugging software, read the radar configuration data, and monitor the status of the radar sensor. Mainly check whether the radar sensor can accurately judge the difference between the reflected echo and the false echo, and whether the intensity of the reflected wave reaches the predetermined standard. If there is no problem with the above test, you need to check other electronic components. When it is determined that the communication unit of the radar level sensor is damaged, you need to replace the component accordingly.
3. Check the displayed value is accurate or not?
Inaccurate display value is a common problem of radar level transmitter. The cause of inaccurate display value may be that the initial setting contrast is not appropriate or the display module plug-in is not connected correctly. Once the display value is found to be invisible, the initial setting of the radar level sensor should be checked and the connection of the display module plug-in should be checked as well. If both of these items are normal, it is necessary to check the output current of the radar level sensor in depth and replace the electronic module of the radar level sensor in time.
4. Fluctuation of measured values
In the tank, the surface of the stirring medium is violently undulating, or the temporary interference echo in the tank is enhanced due to the material being unloaded, which causes the measured value to fluctuate. In addition to improving the application parameters, activating near-field suppression, and increasing output damping, we should also check the installation position of the instrument or consider installing a larger antenna.
5. Does the system display an error message?
When the system displays a wrong message, it is usually because the power supply was cut off before the data storage was completed. At this time, we need to verify, reset and recalibrate. If the alarm still sounds after verification, reset and recalibration, the electronic module of the radar level transmitter needs to be replaced.
6. Diffuse
Diffuse reflection refers to the phenomenon that light projected on a rough surface is reflected in all directions. When the liquid level is low or there is no liquid level, the biggest reason may be that there is a bracket or pipe at the bottom of the test container, or steam is generated during the process, which forms diffuse reflection of the radar wave and causes liquid level failure. In this case, you can wait until the process liquid level is normal and restart it to automatically recover. Diffuse reflection caused by steam will automatically recover after the temperature returns to normal.
FAQs
Below we also listed some questions that customers often ask during use and with our suggestions as well.
1, Q: How to deal with it when there are ladders, steps and mixing inside the tank?
A: When installing the radar level sensor, you should try to stay away from obstacles such as internal ladders and steps. If this is unavoidable, you can use false echo learning to learn the false echo in the container containing known obstacles. Note that the distance needs to be set before learning the false echo.
2. Q: What should we do if there is turbulence, vortex, or thick foam on the liquid surface, which causes loss of wave or weak signal?
A: The mode can be modified to improve radar measurement output stability and signal value.
3. Q: How to deal with the medium with low dielectric constant?
A: When measuring some media with low dielectric constants, such as cement powder, gasoline, organic solvents, etc., it is easy to cause loss of wave or weak signal. The mode can be modified to improve the radar measurement output stability and signal value.
4. Q: How to deal with the mist in the tank?
A: If there is heavy fog, you can choose a large-range electronic module to improve the signal.
5. Q: How to deal with dust in the tank?
A: When measuring some strong dust conditions, such as cement powder, we can choose to install a purge device, but care should be taken to prevent the lens surface from being blocked during purge.
6. Q: How to deal with antenna contamination and crystallization?
A: In the absence of air source, the radar lens surface can only be cleaned regularly. The treatment method is to wear appropriate protective equipment after power off, dismantle the radar and tilt it down, wipe off dirt or crystals with a rag, do not let the antenna bend and damage it, be careful to handle it with care, and avoid damaging the antenna. Or we can choose to install a purge device to solve this problem.
7. Q: How to deal with condensation or ice on the radar level meter antenna in winter?
A: In addition to regular inspection and cleaning, it is recommended to install insulation and heating devices on the outside of the radar level transmitter to keep the temperature near the tank mouth basically constant.
