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MPR180416 Rev. B
2.7.3.4 CLEF Range: The CLEF algorithm is 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. It is used from Far Range up to
the level defined by CLEF Range. Above that point, the Center algoritm is used.
•
CLEF Range is referenced from Far Range
•
The value for the CLEF Range must include the difference between Far Range and Low Calibration Point, plus any
level above the Low Calibration Point to be managed by the CLEF algorithm.
Value Range: 0 to 45 m for 40 m units; 0 to 105 m for 100 m units; Default 0.0 m
2.7.3.5 Echo Marker: The point on the selected echo from which the measured value is taken. Use this feature
if the reported material level fluctates slightly due to a variable rise in the leading edget of the true echo
on the Echo Profile. Enter the value (in percent of echo height) to ensure the Echo Lock window intersects
the Echo Profile at the sharpest rising position of the Echo Profile representing the true echo.
Value Range: 5 to 95%; Default is 70%
2.7.4 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.
2.7.4.1 Echo Lock: Selects the measurement verification process.
Lock Off
Maximum Verification (Not recommended for radar)
Material Agitator; Default
Total Lock (Not recommended for radar)
2.7.4.2 Up Sampling: Specifies the number of consecutive echoes that must appear above the echo currently
selected, before the measurement is accepted as valid.
Value Range: 1 to 50; Default is 5
2.7.4.3 Down Sampling: Specifies the number of consecutive echoes that must appear below the echo currently
selected, before the measurement is accepted as valid.
Value Range: 1 to 50; Default is 2
2.7.4.4 Echo Lock Window: A distance window centered on the echo is used to dervie the reading. When a new
measurement is in the window, the window is re-centered and the reading is calculated. When the value is 0, the
window is automatically calculated after each measurement.
•
For slower Measurement Response values, the window grows at a slower rate.
•
For faster Measurement Response values, the window grows at a faster rate
Value Range: 0 to 45 m; Default is 0 m
2.7.5 Filtering
2.7.5.1 Narrow Echo Filter: Filters out echos of a specific width. To remove a false echo from the Echo Profile, take i
its width in mm and multiply by 0.006. Enter the result. When a value is keyed in, the nearest acceptable value is
entered.
Range: 0 to 255
0 = OFF
greater = wider
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