Siemens sitrans LR 400 Instruction Manual page 45

If the display does not follow the level height continuously but in abrupt jumps, you should
choose a higher filling speed. If multiple echoes are indicated during filling/emptying a
vessel, select a lower filling speed. In the case of very low filling speeds (a few mm/min)
switch off Parameter 4.2.3.3. If different filling/emptying speeds occur, select the higher
speed.
4.2.2.7: Failsafe Level (F = Hold Continuously)
Selects the default measurement in the event that the failsafe timer expires
Value
4.2.2.8: Failsafe Timer (F = 10 min)
Sets the time delay, in minutes, before entering failsafe level
Value
The failsafe timer begins when there is a loss of echo condition. This loss of echo
condition will occur when there is no signal available above the Auto False Echo
Suppression threshold as defined in Parameter 4.2.3.9.
4.2.2.9: Range Extension (F = 3 m)
Sets the amount of range extension as measured from the tank 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
Here you can view and change the sensor parameters which you have selected
according to Parameter 4.2.2.
Note:
The factory settings for the user vessels are not editable.
7ML19985FH03
100 %
0 %
Hold Continuously
1 min
2 min, etc.
numerical
SITRANS LR 400 – INSTRUCTION MANUAL Page 41