Siemens Sitrans LR200 Instruction Manual page 133

Example: CLEF enabled
Vessel height: 1.5 m; CLEF range set to 0.5 m
material
echo
selected
CLEF Range (2.8.4.4.)
Determines the level below which the CLEF algorithm will be used. Above this level the
Center algorithm is used.
Echo Threshold (2.8.4.3.)
Confidence (2.8.6.1.) describes the quality of an echo. Higher values represent higher
quality. Echo Threshold defines the minimum confidence value required for an echo to be
accepted as valid and evaluated.
Echo Lock (2.8.5.1.)
If the echo selected by Algorithm is within the Echo Lock window, the window is centered
about the echo, which is used to derive the measurement. In radar applications, two
measurement verification options are used:
Lock Off
SITRANS LR200 responds immediately to a new selected echo (within the restrictions set
by the Maximum Fill / Empty Rate), but measurement reliability is affected.
Material Agitator
A new measurement outside the Echo Lock Window must meet the sampling criteria
before the window will move to include it.
The other available options, Maximum Verification and Total Lock are not recommended
for radar.
7ML19985JP02
default TVT
vessel
bottom
echo
echo marker
SITRANS LR200 (HART) – INSTRUCTION MANUAL Page 125