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Add or delete an amplitude threshold point
Procedure
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
.
Suppressing 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
.
Figure 7-6: Suppression of False Echoes
PHWHU
P9
'
%
$
(
&
A. Amplitude threshold
B. Disturbing object
C. False echo suppression
D. Suppressed echo
E. Surface
Service and troubleshooting
Reference Manual
February 2020
00809-0100-4408
120
Reference Manual
Содержание Rosemount 5408
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Страница 8: ...Contents Reference Manual February 2020 00809 0100 4408 viii Reference Manual ...
Страница 10: ...Introduction Reference Manual February 2020 00809 0100 4408 10 Reference Manual ...
Страница 20: ...Transmitter overview Reference Manual February 2020 00809 0100 4408 20 Reference Manual ...
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