9 Trouble-shooting
Levelflex M FMP 40 with Foundation Fieldbus
84
EHauser
9.3
Application errors
Error
Output
Possible cause
Remedy
A warning or
alarm has
occurred.
Depending on the configuration
See table of
error messages
(see page 82)
1.
See table of error messages
(see page 82)
Measured value
(00) is incorrect
Measured distance
(008) OK?
yes
→
1.
Check empty calibr. (005) and
full calibr. (006).
2.
Check linearisation:
→
level/ullage (040)
→
max. scale (046)
→
diameter vessel (047)
→
Check table
no
↓
An interference echo
may have been
evaluated.
yes
→
1.
Carry out tank mapping
→
basic setup
No change off
measured value
on
filling/emptying
Interference echo
from
installations, nozzle
or extension on the
antenna
1.
Carry out tank mapping
→
basic setup
2.
If necessary, clean probe.
3.
If necessary, select better
mounting position
E 641 (loss of
echo) after turn
on the power
supply
If the instrument is configured to Hold by
loss of echo the output is set to any
value/current.
noise level during the
initialisation phase to
high.
Repeat once more empty calibr. (005).
Caution!
Before conformation change with
O
or
S
to the edit mode.
20 mA/100%
F m/ft
E m/ft
4 mA/0%
t
→
D m/ft (008)
actual
expected
20 mA/100%
4 mA/0%
t
→
actual
expected