Page 62 SITRANS LR250 (PROFIBUS PA) – INSTRUCTION MANUAL 7ML19985JF02
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Parameters
2.2.3.2.3. Sampling down
Specifies the number of consecutive echoes that must appear below
the echo currently selected, before the measurement is accepted as
valid.
2.2.3.2.4. Window
A "distance window" centered on the echo
1)
is used to derive 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 is
narrow.
• For faster Measurement Response values, the window
becomes progressively wider.
2.2.3.3. Filtering
2.2.3.3.1. Shots
The number of echo profile samples averaged to produce a
measurement.
2.2.3.4. Tank Bottom Algorithm
2.2.3.4.1. CLEF Range
CLEF range is the level below which the CLEF algorithm is used when
Hybrid is selected in Position (2.2.3.1.3.). Above that point the Center
algorithm is used. For more detail see Position (2.2.3.1.3.) on page 113.
Values
Range: 1 to 50
Default: 5
1)
See
Echo Lock (2.2.3.2.1.)
on page 114 for more detail.
Values
Range: 0 to 20 m
Default: 0
Note: The Echo Lock window is stored as a standard sample, but
displayed in sensor units. Any value entered for the Echo Lock
window will be rounded to the nearest sample.
Values
Range: 1 to 25
Default: 25
Note: For low dK liquids we recommend setting Position (2.2.3.1.3.)
to Hybrid and setting CLEF Range to 0.5 m (1.64 ft).
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