Endress+Hauser Micropilot FMR56 - Page 96

Diagnostics and troubleshooting Micropilot FMR56, FMR57 FOUNDATION Fieldbus
96 Endress+Hauser
Error Possible cause Remedy
During filling/emptying or
measurement, the measured
value jumps sporadically to a
higher level.
Signal is weakened (e.g. by
fluidisation of the surface, extreme
dust formation) - the interference
echoes are sometimes stronger.
Strong build-up, filling stream in
path of beam.
• Carry out tank mapping (Confirm
distance parameter (→  131)).
• Increase integration time (Expert
→ Sensor → Distance → Integration
time)
• Optimize alignment of antenna
• If necessary, select a better mounting
position and/or larger antenna.
• If necessary, clean antenna (purge
air).
Error message F941 or S941
"Echo lost"
Level echo is too weak.
Possible causes:
• Fluidisation of the surface
• Extreme dust formation
• Angle or repose
• Optimize alignment of antenna
• If necessary, select a better mounting
position and/or larger antenna.
Measured values jumps to
higher levels and remains
there.
• Build-up at container
• Build-up at antenna
• Strong condensate formation at
antenna
• Periodic cleaning
• Carry out tank mapping (Confirm
distance parameter (→  131)).
• Increase integration time (Expert
→ Sensor → Distance → Integration
time)
• Optimize alignment of antenna
• If necessary, select a better mounting
position and/or larger antenna.
Device displays a level when
the tank is empty.
Interference echo Carry out mapping over entire
measuring range when the silo is empty
(Confirm distance parameter
(→  131)).
Wrong slope of the level
throughout the complete
measuring range
Bin property or process propertis
incorrect
• Select the correct option in Bin type
parameter (→  127).
• Enter the actual values in Max. filling
speed solid (→  127) and Max.
draining speed solid (→  128).