43
13 Diagnostics and servicing
VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology
64808-EN-210426
Fault description
Cause
Rectification
Measured value jumps spo-
radically to 100 % during
filling
Leve
l
time
0
Varying condensation or contamination
on the antenna
Carry out a false signal suppression
or increase false signal suppression
with condensation/contamination in the
close range by editing
Measured value jumps to
≥ 100 % or 0 m distance
Leve
l
time
0
Level echo is no longer detected in
the close range due to foam genera-
tion or false signals in the close range.
The sensor goes into overfill protection
mode. The max. level (0 m distance)
as well as the status message "
Overfill
protection
" are output.
Check measuring point: Antenna should
protrude out of the threaded mounting
socket, possible false echoes through
flange socket?
Remove contamination on the antenna
Liquids: Measurement error during emptying
Fault description
Cause
Rectification
Measured value remains un-
changed in the close range
during emptying
Level
time
0
False signal larger than the level echo
Level echo too small
Check measuring point: Antenna should
protrude out of the threaded mounting
socket, possible false echoes through
flange socket?
Remove contamination on the antenna
In case of interferences due to instal-
lations in the close range: Change
polarisation direction
After eliminating the false signals, the
false signal suppression must be de-
leted. Carry out a new false signal
suppression
Measured value jumps spo-
radically towards 100 %
during emptying
Level
time
0
Varying condensation or contamination
on the antenna
Carry out false signal suppression or in-
crease false signal suppression in the
close range by editing
With bulk solids, use radar sensor with
purging air connection
Bulk solids: 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
