Siemens HydroRanger 200 Manual de Instruções descarregar pdf (Página 212)

Page 198 HydroRanger 200 – INSTRUCTION MANUAL 7ML19981FC01

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Parameters

P832 TVT Shaper Adjust

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.

Adjustment to this parameter is best done 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 191 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.

Changing a breakpoint:

1. Confirm that P831, TVT shaper, is on.

2. Go to P832.

3. Press PROGRAM twice to highlight the index value.

4. Press ARROWS to scroll through the 40 points (or type in the desired point).

5. Enter the value from –50 to 50.

6. Press .

7. Press TRANSDUCER to update the scope display with the new TVT.

Primary Index Global

Values

Range: -50 to 50

Preset: 0

• P810 Scope Displays

• P831 TVT Shaper

1 2 ... 207 208 209 210 211 212 213 214 215 216 217 ... 255 256

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Siemens HydroRanger 200 Manual de Instruções Página 212