Handling Ghost Echoes In Still Pipes - Emerson Rosemount 5408 Reference Manual

Service and Troubleshooting
November 2017
7.6.3

Handling ghost echoes in still pipes

Ghost echoes may occur in still pipes because of multiple reflections between the pipe wall, flange, and
antenna. In the echo curve, these echoes appear as amplitude peaks at various distances below the
product surface, see
the product surface. When enabled, the first echo above threshold will always be considered as the
surface echo.
Figure 7-13. Ghost Echoes in Still Pipes
A. Actual level
B. Virtual level
Procedure
1. In Rosemount Radar Master Plus, read the echo curve. Make sure there are no disturbing echoes
above the product surface. See
2. Under Configure, select Level Setup > Advanced.
3. Under More Advanced Options, select Echo Tracking.
4. In the Surface Echo Tracking list, select User defined, and then select the Track First Echo check box.
5. Select Save.
110
Figure 7-13. The Track First Echo function can eliminate ghost echo problems below
Signal amplitude
Distance
"Use the echo curve" on page
A
B
92.
Reference Manual
00809-0100-4408, Rev BA
Service and Troubleshooting