Tvt (Auto False Echo Suppression) Setup (3.5.6.) - Siemens SITRANS LR460 Operating Instructions Manual

Parameter assignment
8.5 Input (3.)
Near range (3.5.4.1.)
The range in front of the device (referenced from the flange face) within which any echoes
will be ignored. (This is sometimes referred to as Blanking or Dead Zone.)
Values
The default setting of 0.6 m avoids a false echo being triggered by condensation or other
material buildup. If no buildup is anticipated (for example, with dry cement) then the
minimum setting 0.35 m can be used.
Far range (3.5.4.2.)
Maximum distance from the reference point, within which an echo should be considered
valid.
Note
Far Range can extend beyond the bottom of the vessel.
Values
8.5.5.5

TVT (Auto false echo suppression) setup (3.5.6.)

TVT (Auto false echo suppression) setup (3.5.6.)
Note
If the Reform parameter has been used to reshape the echo profile, Auto False Echo
Suppression must be re-enabled, to relearn the TVT curve.
SITRANS LR460 first learns the echo profile. Then the learned profile, or part of it, is used to
screen out false echoes. For more detail, see Auto false echo suppression (Page 134).
88
Range: 0 to 103 m max.
3" HORN
4" HORN
Range: 0 to 103 m max.
Default: The value of Low Calibration Point plus 3 m (9.8 ft)
default: 0.278 m (0.9 ft)
default: 0.335 m (1.1 ft)
Operating Instructions, 10/2021, A5E42035355-AB
SITRANS LR460