Siemens Sitrans LR400 Instruction Manual page 43

4.2.2.9 Range Extension (F = 3 m)
Sets the range extension as measured from the vessel height and extending beyond
the measurement range. For vessels with conical or parabolic bottoms, you may
need to increase this value to ensure an empty vessel reads empty.
Value
4.2.3 Sensor Parameter
View and change the sensor parameters you have selected according to Parameter 4.2.2
(Measuring Conditions).
The factory settings for the user vessels are not editable.
Note:
4.2.3.1 Sensor Damping (F = 1 s)
Averaging of measuring signal. Not displayed if a user vessel is selected in
Parameter 4.2.2.1 (Application Type).
Value
Enter damping in seconds.
This parameter is not displayed when a user vessel is selected in Parameter 4.2.2.1
(Application Type). 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.
Specification of damping directly influences the evaluation of the measuring
Note:
signal. If you only want to dampen the calculated outputs at the analog output, you
should set the damping of level, volume or mass described in Function 4.2.4.4 (MinLim
Level).
4.2.3.2 Multiple Echo (F = on)
Evaluate multiple echoes. The multiple echo evaluation suppresses multiple
reflections by assigning them a lower probability than the measuring signal.
Value
This parameter is not displayed when a user vessel is selected in Parameter 4.2.2.1.
7ML19985FH06 SITRANS LR400 (7ML5421) – INSTRUCTION MANUAL
numerical
numerical
On
Off
Page 39