Siemens LU01 Benutzerhandbuch

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7ML19985BE02
SITRANS LU01 – INSTRUCTION MANUAL
Page 77
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6.
Press ARROWS 
 
 to change the bias value of the breakpoint, –50 to 50.
7.
Press ENTER 
.
8.
Press TRANSDUCER
 to update the scope display with the new TVT.
P833 TVT Start Min
Use this feature to adjust the TVT Curve height to ignore false echoes (or pick up true 
echoes) near the start of the Echo Profile.
Enter the minimum TVT Curve start point (in dB above 1 μV rms).
This feature should only be used if increased Near Blanking (P800) would extend farther 
than desired into the measurement range. 
P834 TVT Start Duration
Use this feature in conjunction with TVT Start Min (P833) to ignore false echoes (or pick 
up true echoes) near the start of the Echo Profile.
Enter the time (in ms) for the TVT Curve to decrease from the TVT Start Min (P833) point 
to the TVT Curve baseline. 
P835 TVT Slope Min
Enter the minimum slope (in dB/s) for the middle of the TVT Curve.
Use this feature to adjust the slope declination, and use it in conjunction with TVT Start 
Duration (when a long flat TVT Type is selected) to ensure the TVT Curve remains above 
the false echoes in the middle of the Echo Profile. Alternatively, if TVT Type is set for TVT 
Slopes (P830 = 6), preset is 2000. Use this parameter to adjust the slope declination when 
TVT type is set to TVT slopes (P830=6).
Values
Range: -30 to 225
Preset: 50
Related
P800 Near Blanking
P834 TVT Start Duration
Values
Range: 0 to 9999
Preset: 30
Related
P833 TVT Start Min
P835 TVT Slope Min
Values
Range: 0 to 9999
Preset: 200
Related
P830 TVT Type
P834 TVT Start Duration