Emerson Rosemount 5408 Reference Manual page 109

Reference Manual
00809-0100-4408, Rev BA
To set the endpoint of a threshold segment:
1. In the echo curve, drag the endpoint up or down, or type the desired value
2. Select Save.
Figure 7-5. Endpoint
A. Endpoint
To add or delete an amplitude threshold point:
1. In the echo curve, select the desired amplitude threshold point, and select Split threshold or Merge
with threshold below.
2. Click again on one of the amplitude threshold points and select Save.
Suppress false echoes
Stationary objects with horizontal surfaces may generate strong false echoes. When the surface is close
to an obstruction in the tank (e.g. beams and agitators), the surface and false echoes might interfere and
cause a decrease in performance.
However, false echoes can be suppressed to reduce the influence of such objects, in case they cannot be
totally avoided. When the surface is passing by a disturbing object, the transmitter will then measure
with higher reliability, even if the surface echo is weaker than the false echo, see
Service and Troubleshooting
Service and Troubleshooting
A
November 2017
(Figure 7-5).
Figure 7-6.
97