A5E33701270 COMMUNICATIONS FOR SITRANS LUT400 (HART) – MANUAL Page 29
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Operation - 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 30.)
Open the menu Device – Echo Profile Utilities and click on the tab TVT Shaper.
When TVT Shaper tab is selected, the current echo profile and its associated parameters
will display, allowing setup of the TVT manually.
• Turn Shaper Mode On.
• 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–.
• Alternatively, enter values for Point and Offset directly into the dialog boxes.
• Press Transfer to Device.
Note: Double click on each axis and record the Xscale and Data Scale values, so that
you can restore the default view by resetting to these values.
Note: If a communication error exists, the profile will not display.
Note:
• If steps are repeated (measurement taken a second time) without first transferring
shaping adjustments to the device, initial shaping will be lost.
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