LW2120
Electronic level sensor
30
A
B
C
D
A:
level
B:
time
C:
actual level
D:
measured level
Possible cause:
•
The level is within the upper blind zone and a false echo is interpreted as the level.
Recommended actions:
•
Check the setting of the upper blind zone.
•
Reduce the maximum permissible level, e.g. by adjusting the switch points.
8.1.4 Measured value fluctuates
A
B
C
A:
level
B:
time
C:
actual level
Possible cause:
•
Excessive foaming or turbulence.
Recommended actions:
•
Under turbulent conditions with low level rates, consider increasing the damping value (parameter
[dAP]).
•
Eliminate or mitigate the cause, e.g. by using an inlet pipe or by throttling the inlet.
