Siemens sitrans LU01 - Manual (Page 83)

7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 77
m
mmmm
Pa
ra
m
e
te
rs
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