SITRANS LR200 with mA/HART
118
Operating Instructions, 05/2019, A5E32337676-AE
Adjusts the TVT (Time Varying Threshold) at a specified range (breakpoint on the TVT). This
allows you to reshape the TVT to avoid unwanted echoes. There are 40 breakpoints
arranged in 5 groups. (We recommend using SIMATIC PDM to access this feature.)
To use TVT Shaper via SIMATIC PDM:
●
Open the menu Device – Echo Profile Utilities and click on TVT Shaper. For more detail
see TVT Shaper (Page 117).
To use TVT Shaper via HMI (Human Machine Interface):
1.
Go to Breakpoint 1-9 (2.8.8.1.) (Page 118)
2.
Open Shaper 1 and enter the TVT Offset value (between –50 and 50).
3.
Go to the next Shaper point and repeat steps c) and d) till all desired breakpoint values
have been entered.
Breakpoint 1-9 (2.8.8.1.)
Values
Range: –50 to 50 dB
Factory setting
0 dB
Breakpoint 10-18 (2.8.8.2.)
Values
Range: –50 to 50 dB
Factory setting
0 dB
Breakpoint 19-27 (2.8.8.3.)
Values
Range: –50 to 50 dB
Factory setting
0 dB
Breakpoint 28-36 (2.8.8.4.)
Values
Range: –50 to 50 dB
Factory setting
0 dB
Breakpoint 37-40 (2.8.8.5.)
Values
Range: –50 to 50 dB
Factory setting
0 dB
