User's Manual

Parameter reference
SITRANS LR250 (FOUNDATION FIELDBUS)
148 Operating Instructions, 01/2014, A5E32221411-AB
Echo Lock (2.5.8.1.)
Note
Ensure the agitator is always running while SITRANS LR250 is monitoring the vessel, to
avoid stationary blade
detection.
Selects the measurement verification process. See
Echo Lock (2.5.8.1.)
for more details.
Options
Lock Off (no verification)
Maximum Verification
*
Material Agitator
Total Lock
Related parameters
Fill Rate per Minute (2.3.8.2.)
Empty Rate per Minute (2.3.8.3.)
Up Sampling (2.5.8.2.)
Down Sampling (2.5.8.3.)
For radar applications, Material Agitator is the most often-used setting, to avoid agitator blade
detection.
Sampling Up (2.5.8.2.)
Specifies the number of consecutive echoes that must appear above the echo currently
selected, before the measurement is accepted as valid.
Values
Range:
1
to
50
Default: 5
Down Sampling (2.5.8.3.)
Specifies the number of consecutive echoes that must appear below the echo currently selected,
before the measurement is accepted as valid.
Values
Range: 1 to 50
Default: 2 (see Related parameters)
Related
parameters
Echo Lock (2.5.8.1.) If Echo Lock set to any value other than its default (2),
then Down Sampling default = 5.