VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART four-wire Approval according to LPR radio standard - Manual (Page 59)

Fault description Error pattern Cause Rectification
2. Measured value jumps towards
0 %
Level
time 0
l Multiple echo (ves-
sel top, product sur-
face) with amplitude
higher than the level
echo
l Check para-
meter
"
Applica-
tion", in par-
ticular Ves-
sel top,
Product ty-
pe, Dished
bottom, High
dielectric va-
lue and
adapt if ne-
cessary
3. Measured value
jumps towards 100 %
Level
time 0
l Due to the process, the amp-
litude of the product echo sinks
l A false signal suppression was
not carried out
l Carry out false signal suppres-
sion
l Amplitude or position of a false
echo has changed (e.g. con-
densation, buildup); false sig-
nal suppression no longer
matches
l Determine the reason for the
changed false echoes, carry
out false signal suppression, e.
g. with condensation
Measurement error during filling
Fault description Error pattern Cause Rectification
4. Measured value re-
mains unchanged du-
ring filling
Level
time 0
l False echoes in the close
range too big or product echo
too small
l Strong foam or spout genera-
tion
l Max. adjustment not correct
l Remove false echoes in the
close range
l Check measurement situation:
Antenna must protrude out of
the socket, installations
l Remove pollution on the an-
tenna
l Minimize interfering installa-
tions in the close range by
changing the polarization di-
rection
l Create a new false signal sup-
pression
l Adapt max. adjustment
5. Measured value re-
mains in the bottom
section during filling
Level
time 0
l The tank floor echo is larger
than the product echo, e.g.
with products with ε
r
< 2.5 oil-
based, solvents
l Application parameter "Me-
dium", check Vessel height and
Floor form, adapt if necessary
VEGAPULS 61 • Approval according to LPR radio standard 59
9 Diagnosis, Asset Management and service
41714
-EN
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