Page 60 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS A5E32337695
Parameters
TVT (Time Varying Threshold) Adjustment Parameters
(P830 to P839)
First SITRANS Probe LU learns the echo profile. Then the learned profile, or part of the
learned profile, is used to screen out false echoes.
1
The following parameters are for authorized Siemens Service personnel or technicians
familiar with Siemens echo processing techniques. View the echo profile first, before
attempting to modify these parameters.
P830 TVT Type
Selects the TVT Curve used.
Select the TVT type which gives the highest confidence (P805) under all level conditions.
Use this parameter with caution, and do not use TVT Slopes with the F (First) or bLF (best
of Largest or First echo) Algorithm (P820).
P831 TVT Shaper
Turns the TVT Shaper ON or OFF.
1.
For more detail, see
TVT (Time Varying Threshold) curves
on page 89.
Values
1 * TVT Short Curved
2 TVT Short Flat
3TVT Long Flat
4 TVT Long Smooth Front
5 TVT Long Smooth
6TVT Slopes
Altered By •P002 Material
Related • P805 Echo Confidence
Note: This parameter is for use by Siemens Service personnel.
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