User's Manual

A5E32337685 SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 59
mmmmm
Parameters
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.
2.2.3.3.2. Narrow Echo Filter (NARROW ECHO FIL.)
Filters out echoes of a specific width
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 104 for more detail.
Values
Range: 0 to 31.5 m
Default: 0 m
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: 10
Values
Range: 0 to 255
0 = OFF
greater = wider
Default: 0 (OFF)
Related
parameters
2.2.3.3.3. Reform Echo