User's Manual

Parameter reference
SITRANS LR250 (PROFIBUS PA)
118 Operating Instructions, 01/2014, A5E32221386-AB
Shaper Mode (2.5.10.4.)
Enables/disables
TVT shaper
(2.5.11.)
Options
ON
*
OFF
TVT shaper (2.5.11.)
Note
•
The range is –50 to 50 dB.
•
Shaper Mode (2.5.10.4.)
must be turned
ON
in order for TVT shaper points to be
transferred.
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. Go to
Level Meter > Setup > Signal Processing > TVT setup > Shaper Mode
and select
On
.
2. Open the menu
Device – Echo Profile Utilities
and click on TVT Shaper. For more detail see
TVT Shaper via SIMATIC PDM (Page 72).
To use TVT shaper via LUI (local user interface):
1. Go to
Shaper Mode (2.5.10.4.)
and select
ON
.
2. In TVT shaper, go to
Breakpoints
1-9 (2.5.11.1.)
.
3. Open Breakpoint 1 and enter the TVT Offset value (between –50 and 50 dB).
4. Go to the next Breakpoint and repeat step 3 until all desired breakpoint values have been
entered.
Breakpoint 1-9 (2.5.11.1.)
Values
Range: –50 to 50 dB
Default: 0 dB