VEGA VEGAPULS WL 61 Foundation Fieldbus - Manual (Page 34)

34
7 Diagnosis, Asset Management and service
VEGAPULS WL 61 • Foundation Fieldbus
38063-EN-121011
Fault description Error pattern Cause Rectification
9. Measured value
jumps sporadically to
100 % during filling
Level
time 0
– Varying condensation or con-
tamination on the antenna
– Carry out a false signal sup-
pression or increase false
signal suppression with con-
densation/contamination in the
close range by editing
10. 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 generation or false
echoes in the close range. The
sensor goes into overfill protec-
tion mode. The max. level (0 m
distance) as well as the status
message "Overfill protection"
are outputted.
– Check measuring site: Antenna
must protrude out of the socket
– Remove contamination on the
antenna
– Use a sensor with a more suit-
able antenna
7.4 Measurement error during emptying
Fault description Error pattern Cause Rectification
11. Measured value re-
mains unchanged in
the close range during
emptying
Level
time 0
– False signal larger than the
level echo
– Level echo too small
– Remove false echoes in the
close range. Check: Antenna
must protrude out of the socket
– Remove contamination on the
antenna
– Minimize interfering instal-
lations in the close range by
changing the polarization
direction
– After removing the false ech-
oes, the false signal suppres-
sion must be deleted. Carry out
a new false signal suppression
12. Measured value
jumps towards 0 %
during emptying
Level
time 0
– Echo from the tank bottom
larger than the product echo,
for example, with products with
ε
r
< 2.5 oil-based, solvents
– Check application parameters
Medium type, Vessel height and
Floor form, adapt if necessary
13. Measured value
jumps sporadically to-
wards 100 % during
emptying
Level
time 0
– Varying condensation or con-
tamination on the antenna
– Carry out false signal suppres-
sion or increase false signal
suppression in the close range
by editing
– With bulk solids, use radar sen-
sor with purging air connection
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Setup" must be carried out again or must
be checked for plausibility and completeness.
Should these measures not be successful, please call in urgent cases
the VEGA service hotline under the phone no. +49 1805 858550.
The hotline is also available outside the normal working hours on
seven days a week around the clock.
Since we offer this service worldwide, the support is in the English
language. The service itself is free of charge, the only costs involved
are the normal call charges.
Reaction after fault recti-
fication
24 hour service hotline