Operating Instructions

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① CLEF Range
② Sensor reference point
③ Low Calibration Point (process empty level )
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.
Sampling (2.8.5.)
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.
Echo Lock (2.8.5.1.)
Note
Ensure the agitator is always running while SITRANS LR250 is monitoring the vessel, to avoid
stationary blade detection.
Selects the measurement verification process.
Options Lock Off
Maximum Verification (not recommended for radar)
* Material Agitator
Total Lock (not recommended for radar)
Related parameters Fill Rate per Minute (2.4.2.)
Empty rate per Minute (2.4.3.)
Sampling Up (2.8.5.2.)
Sampling Down (2.8.5.3.)
For radar applications, Material Agitator is the most often-used setting, to avoid agitator blade
detection.
Sampling Up (2.8.5.2.)
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
Parameter reference
SITRANS LR250 with mA/HART
124 Operating Instructions, 10/2019, A5E32220602-AG