Tvt Shaper; Hover Level; Shaper Mode; Breakpoints - Siemens SITRANS LR560 Operating Instructions Manual

2.8.2. Auto False Echo Suppression Range
Defines the endpoint of the Learned TVT distance. Units are defined in
(2.2.1.).
Values
Related parameters

2.8.3. Hover Level

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 Before Auto False Echo
Suppression on page 53 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.

2.8.4. Shaper Mode

Enables/disables the TVT shaper.
Options

2.9. TVT shaper

Note:
• Shaper Mode (2.8.4.) must be turned ON in order for TVT breakpoints to be
transferred.
• We recommend using SIMATIC PDM to access this feature
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 120

breakpoints.

Values
To use TVT shaper via SIMATIC PDM:
a) Go to Level Meter > Setup > Signal Processing > TVT setup > Shaper Mode
and select On.
b) Open the menu Device – Echo Profile Utilities and click on TVT Shaper.
A5E34647946 SITRANS LR560 (mA/HART) – OPERATING INSTRUCTIONS
Used in combination with Auto False Echo Suppression (see above). .
Range: 0.00 to 45.00 m (or 105.00 m depending on
model)
Default: 1.00 m
Units (2.2.1.)
Range: 0 to 100%
Default: 40%
ON
* OFF
Range: –50 to 50 dB
Default: 0 dB
Units
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