User's Manual

Table Of Contents
A5E32337685 SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 45
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SIMATIC PDM
TVT Shaper
This feature allows you to manually adjust the TVT curve to avoid false echoes caused by
obstructions. (For an explanation see
Auto False Echo Suppression
on page 105.)
Open the menu Device – TVT Shaper
Press Measure to refresh the echo profile and load the current TVT curve from the
device.
Change the position of the cursor on the TVT curve using the Point+ and Point
buttons: raise and lower the curve using Offset+ and Offset– (entered in dB).
Alternatively, enter values for Point and Offset directly into the dialog boxes.
If desired, click on the TVT breakpoints tabs to see settings.
Then press Transfer to Device.
Note: Record the default X-Scale (horizontal axis) and Data Scale (vertical axis) values
so that you can restore the default view by resetting to these values.