Siemens SITRANS LR560 Operating Instructions Manual page 82

2.4.9. TVT shaper
Notes:
• Shaper Mode (2.4.8.4.) must be turned ON in order for TVT shaper
breakpoints to be transferred.
• We recommend using SIMATIC PDM to access this feature.
Adjusts the TVT (Time Varying Threshold) at a specified range (breakpoint on
the TVT). This allows you to reshape the TVT curve to avoid unwanted echoes.
There are 120 breakpoints.
Values
To use TVT shaper via SIMATIC PDM:
Open the menu Device – Echo Profile Utilities and click on the tab TVT Shaper
TVT Shaper on page 47
(see
To use TVT shaper via the local display interface (LDI):
a) Go to Shaper Mode (2.4.8.4.) and select option ON.
b) In TVT shaper, go to Breakpoint 1-9 (2.4.9.1.).
c) Open Breakpoint 1 and enter the TVT Offset value (between –50 and 50).
d) Go to the next Breakpoint and repeat step (c) till all desired breakpoint
values have been entered.
2.4.9.1.
2.4.9.2.
2.4.9.3.
2.4.9.4.
2.4.9.5.
2.4.9.6.
2.4.9.7.
2.4.9.8.
2.4.9.9.
2.4.9.10. Breakpoint 82-90
2.4.9.11. Breakpoint 91-99
2.4.9.12. Breakpoint 100-108
2.4.9.13. Breakpoint 109-117
2.4.9.14. Breakpoint 118-120
Page 76 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS
Range: –50 dB to +50 dB
Default: 0
for more details).
Breakpoint 1-9
Breakpoint 10-18
Breakpoint 19-27
Breakpoint 28-36
Breakpoint 37-45
Breakpoint 46-54
Breakpoint 55-63
Breakpoint 64-72
Breakpoint 73-81
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