Siemens SITRANS LR260 Operating Instructions Manual page 61

2.2.4.2.6. Window
A "distance window" centered on the echo
When a new measurement is in the window, the window is re-centered
and the reading is calculated.
Values
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.
Note:
displayed in sensor units. Any value entered for the echo lock window
will be rounded to the nearest sample.
2.2.4.3. Filtering
2.2.4.3.2. Damping Filter
The time constant for the damping filter. The damping filter smooths out
the response to a sudden change in level. This is an exponential filter and
the engineering unit is always in seconds. See Damping on page 96 for
more detail.
Values
2.2.4.3.6. Narrow Echo Filter
Filters out echoes of a specific width.
Values
Related
parameters
To remove a false echo from the Echo Profile, take its width in mm and
multiply it by 0.013. Enter the result.
For example, to filter out a spike with 500 mm width, enter 6 or 7 (the
closest integer product of 500 x 0.013).
When a value is keyed in, the nearest acceptable value is entered.
1)
See Echo Lock on page 93 for more detail.
7ML19985KE02 SITRANS LR260 (HART) – INSTRUCTION MANUAL
Range: 0 0 to 3 3 0 m
Default: 0
The echo lock window is stored as standard sample, but
Range: 0 0 to 1 1 000 s
Default: 0 s
Range: 0 to 255
0 = OFF
greater = wider
Echo Confidence Long
2.2.4.3.7. Reform Echo
1)
, used to derive the reading.
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