40
10 Diagnostics and servicing
VEGAPULS 11 • Two-wire 4 … 20 mA
58350-EN-221027
The images in column "
Error description
" show the actual level as a
dashed line and the output level as a solid line.
1
2
Level
time
0
1 Real level
2 Level displayed by the sensor
Note:
If the output level is constant, the cause could also be the fault setting
of the current output to "
Hold value
".
If the level is too low, the reason could be a line resistance that is too
high
Liquids: Measurement error at constant level
Fault description
Cause
Rectification
Measured value shows a too
low or too high level
Leve
l
time
0
Min./max. adjustment not correct
Adapt min./max. adjustment
Incorrect linearization curve
Adapt linearization curve
Measured value jumps to-
wards 100 %
Level
time
0
Due to the process, the amplitude of the
level echo sinks
A false signal suppression was not car-
ried out
Carry out a false signal suppression
Amplitude or position of a false signal
has changed (e.g. condensation, build-
up); false signal suppression no longer
matches actual conditions
Determine the reason for the changed
false signals, carry out false signal sup-
pression, e.g. with condensation.
