User's Manual

7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 37
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Parameters (HART)
4.2.3.1: Sensor Damping (F = 10 s)
Averaging of measuring signal. Not displayed if a user vessel is selected in parameter
4.2.2.1.
This parameter is not displayed when a user vessel is selected in parameter 4.2.2.1. The
sensor damping influences the evaluation of the measuring signal. If the level generally
only changes slowly and continuously, a time constant set here can improve the
measuring accuracy and the validity in poorly reflecting measuring media or those with a
restless surface. The sensor damping must always be smaller than the interval of the
time of change of the level (e.g. 1 mm/10 s), because too high a value would have a
negative influence on the measuring result.
Enter the damping in seconds.
4.2.3.2: Multiple Echo (F = on)
Evaluate multiple echo
The multiple echo evaluation suppresses multiple reflections by assigning them a lower
probability than the measuring signal.
4.2.3.3: Echo Motion (F = off)
Evaluate echo motion
Dynamic processes in the vessel are included in the evaluation of the measuring targets.
The typical filling speed can be set in Parameter 4.2.2.5. If, however, the measured value
still does not follow the level height, switching off the parameter “echo motion” could
possibly improve the result.
Value
numerical
Value
on
off
Value
on
off
Note: Specification of a damping directly influences the evaluation of the measuring
signal. If you only want to dampen the calculated outputs at the analog output, you
should set the damping of level or volume described in Function 4.2.4.4.
chap6.fm Page 37 Tuesday, October 9, 2001 2:26 PM