Vega VEGAPULS 69 - Exchanging the Electronics Module

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9 Diagnosis, asset management and service
VEGAPULS 69 • Foundation Fieldbus
47251-EN-160815
Measurement error during emptying
Fault description Error pattern Cause Rectication
6. 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
– Eliminate false signals 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 eliminating the false sig-
nals, the false signal suppres-
sion must be deleted. Carry out
a new false signal suppression
7. Measured value
jumps sporadically to-
wards 100 % during
emptying
Level
time
0
– Changing 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
orexibleantennacover
8. Measured val-
ueuctuatesaround
10 … 20 %
Level
time
0
– Various echoes from an uneven
product surface, e.g. an extrac-
tion funnel
– Check parameter "Type of
medium" and adapt, if neces-
sary
– Optimizeinstallationposition
and sensor orientation
– Reectionsfromtheproduct
surface via the vessel wall
(deection)
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 normal working hours, seven
days a week around the clock.
Sinceweoerthisserviceworldwide,thesupportisprovidedin
English. The service itself is free of charge, the only costs involved are
the normal call charges.
9.5 Exchanging the electronics module
If the electronics module is defective, it can be replaced by the user.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
If there is no electronics module available on site, the electronics
module can be ordered through the agency serving you. The electron-
icsmodulesareadaptedtotherespectivesensoranddierinsignal
output or voltage supply.
Reaction after fault recti-
cation
24 hour service hotline