Endress+Hauser levelflex M FMP 40 Manual page 77

Levelflex M
Endress+Hauser
Code Description
A241 Broken probe
A251 Feedthrough
A261 HF cable defective
A275 Offset too high
A512 recording of mapping
please wait
W601 linearisation ch1 curve
not monotone
W611 less than 2
linearisation points for
channel 1
W621 simulation ch. 1 on
E641 no usable echo
channel 1
check calibr.
E651 level in safety
distance - risk of
overspill
A671 linearisation ch1 not
complete, not usable
W681 current ch1 out of
range
Tab. 3 System error messages
Possible cause
Broken probe or
value for probe length is too short
Lost contact in the process
feedthrough
HF cable defective or HF
connector removed
Temperature at the electronics too
high or HF module defective
mapping active
linearization not monotonously
increasing
number of entered linearization
points < 2
simulation mode is active
echo lost due to application
conditions of built up on antenna
level in safety distance
linearisation table is in edit mode
current out of range (3,8 mA ... 21,5
mA)
15 Trouble-shooting
Remedy
Check the probe length in
033, Check the probe itself,
if the probe is broken,
change the probe, or change
to a non contact system
Replace process feedtrough
Check HF connector, replace
cable if defective
Check temperature, replace
HF module if defective
wait some seconds until
alarm disappears
correct linearisation table
correct linearisation table
switch off simulation mode
check installation; clean
antenna (cf. Operating
Instructions)
alarm will disappear as soon
as level leaves safety
distance;
activate linearisation table
check calibration and
linearisation
77