Tvt Shaper (2.12.4.) - Siemens SITRANS LUT400 Operating Instructions Manual

Auto False Echo Suppression Range (2.12.3.2.)
Specifies the range within which Learned TVT is used (see Auto False Echo Suppression
(2.12.3.1.) (Page 222) for more detail).
Values
1. Calculate range according to Auto False Echo Suppression (2.12.3.1.) (Page 222) steps
1 and 2.
2. Press RIGHT arrow to open Edit mode.
3. Enter the new value and press RIGHT arrow to accept it.
4. Navigate to Setup (2.) (Page 168) > Signal Processing (2.12.) (Page 218) > TVT Setup
(2.12.3.) (Page 221) > Auto False Echo Suppression (2.12.3.1.) (Page 222), and set
value.
Hover Level (2.12.3.3.)
Defines how high the TVT (Time Varying Threshold) is placed above the noise floor of the
echo profile, as a percentage of the difference between the peak of the largest echo in the
profile and the noise floor. See Example before Auto False Echo Suppression in Shaper
Mode and Auto False Echo Suppression (Page 293) for an illustration.
Values
When the device is located in the center of the vessel, the TVT hover level may be lowered
to increase the confidence level of the largest echo.
Shaper Mode (2.12.3.4.)
Enables/disables the TVT shaper.
Options
Turn TVT Shaper Mode ON before using TVT Shaper (2.12.4.) (Page 223). Turn the TVT
Shaper ON and OFF while monitoring the effect to pick up the true echo.
9.2.12.4

TVT Shaper (2.12.4.)

Adjusts the TVT (Time Varying Threshold) at a specified range (breakpoint on the TVT). This
allows you to reshape the TVT to avoid unwanted echoes. There are 40 breakpoints
arranged in 5 groups. (We recommend using SIMATIC PDM to access this feature.)
To use TVT shaper via SIMATIC PDM:
1. Open the menu Device – Echo Profile Utilities and click on TVT Shaper. (For more details
see TVT Shaper in LUT400 Communications manual
SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
Range: 0.000 to 60.000 m
Default: 1.000
Range: 0 to 100
Default: 40
*
ON
OFF
.)
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