The staff of a plant checked and found that the output of the radar level meter of the melamine unit was always at its maximum value. The staff then judged that there were obstacles blocking the transmission wave so the level meter measured the minimum distance.
After careful inspection, it was found that there was a water column under the quartz window, which normally works normally after flushing with water. However, if the quartz crystal is stained with material or dirt, it needs to be cleaned promptly.
You need to close the ball valve, remove the cover flange and quartz solid window flange, and wipe the quartz surface with a silk cloth dipped in alcohol, gasoline, and other solvents. , Do not scrub with alkaline solvents, and finally wipe dry the quartz glass, the instrument indication is back to normal.
Note: During the cleaning process, do not remove the quartz fixing screws, and do not use metal pliers to avoid damaging the spraying layer on the quartz surface. When reinstalling the quartz window flange, the graphite stainless steel winding gasket should be replaced with a new one according to the factory requirements.