Advanced Configuration
October 2018
Reference Manual
00809-0100-4026, Rev KC
Advanced Configuration
264
C.5 Advanced functions in RRM
C.5.1 Empty tank handling
Bottom echo visible
The Bottom Echo Visible... parameter allows the transmitter to separate the product surface from the tank
bottom by identifying the bottom echo as a disturbance echo. This is useful for products relatively
transparent for microwaves, such as oil. For non-transparent products, such as water, there is no visible
bottom echo until the tank is empty.
To enable this function:
1. Disable the Use Automatic Empty Tank Handling Settings option.
2. Select the Bottom Echo Visible if Tank is Empty check-box.
Only use this function for tanks with a Flat bottom type where the radar echo from the tank bottom is
clearly visible. If there is no distinct bottom echo, even if the tank is empty, this parameter should be
disabled. Otherwise, if the surface echo is temporarily lost, the transmitter starts searching for the
product surface in the tank and may incorrectly interpret any object as the surface.
The spectrum function in the RRM program can be used to check if the gauge detects the tank bottom in
an empty tank.
Amplitude
Distance
Echo from
tank bottom
Surface echo
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