Troubleshooting - Endress+Hauser Levelflex FMP 232 Schnellinbetriebnahme

4. Trouble-shooting
The table lists the most common measuring errors with possible remedies. If the first measure is successful, the remaining steps are not required.
Sequence Display Possible cause
1 No output Fuse?
signal
Incorrectly wired or broken line?
Condensation in housing
2 Incorrect Calibration in wrong units?
measured
Incorrect calibration?
value or
Linearisation correct?
current
4/20 mA settings wrong
Value entered in V3H5 for partial map too large:
level signal suppressed
Customer map with partially full silo:
level signal suppressed
Product within blocking distance
Electrostatic charge on probe rope
Error not found
3 Reading Reflecting signal too weak (<3). Check in V3H2
erratic
Signal intermittent
z. B. sporadic interference
Signal jumps to higher values because interfe-
rence stronger than signal
Ambient temperature too high
Probe mounted in filling stream
Voltage variations
(reading drops to zero)
EMC problems
Probe rope frayed or abraded
4 Reading locks Fittings or nozzle too near probe
during
E set below end of rope V3H5
emptying
ML not reduced, e.g. for tie-down
Rope touching wall (reflection signal very high)
Build-up on rope
Rope or weight torn off
Tie-down loose
5 Total break- Destroyed due to static discharges at extremely
down, high energies
components
damaged
6 No Smart- Incorrectly wired
communica-
Residual ripple too high (HART)
tion
Endress+Hauser
Remedy
– Check fuse, check specifications
– Check wiring
– Dry out and check gland
– Check V8H2, recalibrate
– Check E (V0H1) and F (V0H2), recalibrate
– Check parameters, with simulation if necessary
– Re-enter values in V0H5 und V0H6
– New partial map with smaller value
– Empty silo and repeat customer map or reset 111 (V9H5) then make
partial map
– Set F below blocking distance
– Power reset (check grounding of probe)
– Enter current level in V3H3 in m (or ft)
– till incorrect? Call Service!
– Record new probe map with empty silo
– Material not suitable. Dielectric constant too small
– Increase persistence filter index (V3H9)
– No effect? Call Service!
– Increase blocking distance (V3H8)
– Use protective hood or remote housing
– Reposition
– Check power supply
– Install screened signal cables or check grounding
– Reposition probe or check if a non-contact ultrasonics system should
be used
– Record probe map Increase blocking distance
– Normal operation: Zero is shown until
measurement returns within range, otherwise re-enter "E" and "F"
– Reduce V3H5
– Use tie-down
– Either clean rope or remap probe and increase blocking distance
– Install new probe
– Empty silo and re-tie
– Call Service
Return instrument, replacement with special electronics
– Check screening, wiring and load
– Check power supply
FMP 232, 332
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