Siemens LU01 ユーザーズマニュアル

Page 76

SITRANS LU01 – INSTRUCTION MANUAL

7ML19985BE02

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 bF or bLF Algorithm 
(P820). 

Turns the TVT Shaper ON or OFF.

Turn the TVT Shaper ON before using P832 and afterwards. Turn the TVT Shaper ON and 
OFF while monitoring the effect to pick up the true echo. 

Allows manual adjustment of the TVT curve.

Use this feature to bias the shape of the TVT curve to avoid selecting false echoes from 
fixed objects.

Adjust this parameter while viewing the echo profile with Dolphin Plus. Refer to the 
Dolphin Plus online help for details. If Dolphin Plus is not available, then an oscilloscope 
can be used. When using an oscilloscope, the Echo Lock Window display becomes the 
TVT Curve Pointer. See 

P810 Scope Displays

 on page 71 for more information.

The TVT curve is divided into 40 breakpoints, accessible by enabling the point number as 
the breakpoint index field. Each breakpoint is normalized to a value of 0, as displayed in 
the parameter value field. By changing the breakpoint value, up or down, the intensity of 
the bias applied to that breakpoint of the curve is respectively changed. By changing the 
value of adjacent breakpoints, the effective bias to the shaper can be broadened to suit 
the desired correction. In the case of multiple false echoes, shaping can be applied along 
different points of the curve. Shaping should be applied sparingly in order to avoid 
missing the true echo.

1.

Confirm that P831, TVT shaper, is on.

2.

Go to P832.

3.

Press MODE 

 and then press DISPLAY 

 to access the Breakpoints.

4.

Press MODE 

 to select the Auxiliary function.

5.

Press 

 to scroll the breakpoint index through points 1 to 40, and move the 

curve pointer right or left respectively.

0

*

Off

1

On

•

P832 TVT Shaper Adjust

Breakpoint

Range: -50 to 50
Preset: 0

•

P810 Scope Displays

•

P831 TVT Shaper