Siemens SITRANS LR460 HART Operating Instructions Manual page 70

To use Auto False Echo Suppression via SIMATIC PDM:
a.
b.
c.
d.
e.
f.
To use Auto False Echo Suppression via the handheld programmer:
a.
b.
3.5.6.2.
Defines the endpoint of the Learned TVT distance.
a.
b.
c.
Values
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Determine Range (the distance within which the learned TVT will
replace the default TVT). Measure the actual distance from the
antenna reference point to the material surface using a rope or tape
measure, and make allowances for the actual location of the LR460.
Subtract 2 m (6.56 ft) from this distance, and use the resulting value.
Open the menu Device – Auto False Echo Suppression.
Enter the value for Range and click Set Range.
Click Learn. The On and Off buttons disappear while the new curve
is being learned.
When the buttons reappear, click Close. Auto TVT is now on, and the
learned TVT curve will be used.
To turn Auto False Echo Suppression off or on, reopen menu Device
– Auto TVT and click On or Off.
3.5.6.2. Range (Auto False Echo Suppression Distance)
See
below and enter the value.
Select Learn. The device will automatically revert to On (Use
Learned TVT) after a few seconds.
Range (Auto False Echo Suppression Distance)
Determine the actual distance from the antenna reference point to
the material surface. Use a rope or tape measure, and make
allowances for the actual location of the LR460. Subtract 2 m (6.56 ft)
from this distance, and use the resulting value.
Enter the value for Range and press Right Arrow to accept it.
3.5.6.1. Auto False Echo Suppression (AUTO TVT)
Go to
Range: 0 to 100 m
Default: 1 m
SITRANS LR460 – INSTRUCTION MANUAL
, step a
. step b.
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