Siemens Sitrans LR200 Instruction Manual page 96

2.8.4.3.
Sets the minimum echo confidence that the echo must meet in order to
prevent a Loss of Echo condition and the expiration of the Fail-safe (LOE)
timer. When Confidence (2.8.6.1.) exceeds Echo Threshold (2.8.4.3.), the
echo is accepted as a valid echo and is evaluated.
Values
Related
Parameters
Use this feature when an incorrect material level is reported.
2.8.4.4.
Used mainly to allow correct level reporting for low dK materials which may
otherwise cause an incorrect reading in an empty or almost empty vessel.
CLEF range is the level below which the CLEF algorithm is used when
Hybrid is selected in Position Detect (2.8.4.2.). Above that point the Center
algorithm is used. For more detail see Position Detect (2.8.4.2.) on page 123).
Values
Related
parameters
In applications with low dK materials we recommend setting CLEF Range
to 0.5 m (1.64 ft) and Position Detect (2.8.4.2.) to Hybrid.
2.8.5. Sampling
Provides a method of checking the reliability of a new echo before accepting it
as the valid reading, based on numbers of samples above or below the
currently selected echo.
2.8.5.1.
Note: Ensure the agitator is always running while SITRANS LR200 is
monitoring the vessel, to avoid stationary blade detection.
Selects the measurement verification process.
Options
Related
parameters
For radar applications, Material Agitator is the most often-used setting, to
avoid agitator blade detection.
Page 88 SITRANS LR200 (HART) – INSTRUCTION MANUAL
Echo Threshold
Range: 0 to 99
Default: 5
Timer (2.5.2.)
CLEF Range
Range: 0 to 20 m (0 to 65.6 ft)
Default: 0.00 m
Position Detect (2.8.4.2.)
Echo Lock
Lock Off
Maximum Verification (not recommended for radar)
*
Material Agitator
Total Lock (not recommended for radar)
Fill Rate (2.4.2.)
Empty rate (2.4.3.)
Sampling Up (2.8.5.2.)
Sampling Down (2.8.5.3.)
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