Advanced Configuration
October 2018
Reference Manual
00809-0100-4026, Rev KC
Advanced Configuration
260
C.4 Advanced transmitter settings
C.4.1 Antenna type
The transmitter is designed to optimize measurement performance for each available antenna type. This
parameter is pre-configured at factory but may need to be set if a non-standard antenna is used.
C.4.2 Empty tank handling
The Empty Tank Handling functions handle situations when the surface echo is close to the tank bottom:
Tracking of weak product echoes
Handling lost echoes
If the surface echo is lost, this function has the transmitter present a zero-level measurement. An alarm is
activated unless the alarm has been blocked.
Empty tank detection area
The Empty Tank Detection Area is the range within a lower limit of 16 in. (400 mm) and a higher limit of
39 in. (1000 mm) above the tank bottom. If the surface echo is lost in this region, the tank is considered
empty (the device enters Empty Tank State) and the transmitter presents a zero level reading.
If the tank is empty, the transmitter searches double the Empty Tank Detection Area for the product
surface. When a new echo is found, it is considered to be the product surface.
It is important that there are no disturbances in this area, but if there are, they may need to be filtered
out.
This function requires the Bottom Echo Visible function to be disabled. The current Empty Tank
Detection Area value is shown in Advanced Setup in RRM and can be adjusted manually, if required. See
“Empty tank detection area” on page 264.
Bottom echo visible
Only set this parameter if the bottom echo is visible. Setting this parameter will use the bottom echo as a
disturbance echo to facilitate tracking of weak surface echoes close to the tank bottom.
Check that the gauge detects the tank bottom when the tank is empty before activating this function.
See “Bottom echo visible” on page 263.
Tank bottom projection
This function handles situations close to the tank bottom and may enhance measurement performance
in the tank bottom region. In this region, the signal from the actual tank bottom may be significantly
stronger than the measurement signal from the product surface, in some situations.
Extra echo
Extra Echo Detection is used for tanks with domed or conical bottom types and when there is no strong
echo from the tank bottom when the tank is empty and an echo beneath the actual tank bottom can
sometimes be seen. See “Extra echo function” on page 265.
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