Registration Of False Echoes - Emerson Rosemount 5402 Reference Manual

Service and Troubleshooting
October 2018
By adjusting the surface threshold, the product surface is properly detected, as illustrated in
Figure 7-4. Echo Curve after Surface Threshold was Adjusted
To adjust the amplitude thresholds, see
In the Echo Curve Analyzer in RRM, the amplitude threshold points can easily be dragged to the desired
values.
7.3.3

Registration of false echoes

The False Echo function improves the performance of the gauge when the surface is close to a horizontal
surface of a static object in the tank. The object causes an echo when it is above the surface. When the
echoes from the surface and the object are close to each other, they may interfere and cause a decrease
in performance.
Figure 7-5. The Rosemount 5400 can Handle Disturbing Radar Echoes
False echo
Surface echo
164
Reference
Distance, m
Disturbing
objects
After surface threshold is adjusted,
the product surface is correctly
detected
"Using the Echo Curve Analyzer" on page
Reference Manual
00809-0100-4026, Rev KC
Figure 7-4.
Surface Threshold =
ATC
166.
Service and Troubleshooting