Levelflex M FMP41C with HART/4...20 mA Trouble-shooting
Endress + Hauser 67
W601 linearisation ch1 curve not
monotone
linearization not monotonously increasing correct linearisation table
W611 less than 2 linearisation
points for channel 1
number of entered linearization points < 2 correct linearisation table
W621 simulation ch. 1 on simulation mode is active switch off simulation mode
E641 no usable echo
channel 1
check calibr.
echo lost due to application conditions of
built up on antenna
check installation;
clean probe (cf. Operating
Instructions)
W650 Signal/noise ratio too low
or no echo
noise on signal to high eliminate electromagnetic
interference
E651 level in safety distance - risk
of overspill
level in safety distance alarm will disappear as soon as level
leaves safety distance
A671 linearisation ch1 not
complete, not usable
linearisation table is in edit mode activate linearisation table
W681 current ch1 out of range current out of range
(3.8 mA ... 21,5 mA)
check calibration and linearisation
Code Description Possible cause Remedy
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