Endress+Hauser Micropilot FMR51 - Page 96

Diagnostics and troubleshooting Micropilot FMR51, FMR52 FOUNDATION Fieldbus
96 Endress+Hauser
Error Possible cause Remdy
If the surface is not calm (e.g.
filling, emptying, agitator
running), the measured value
jumps sporadically to a
higher level
Signal is weakened by the rough
surface - the interference echoes are
sometimes stronger.
• Carry out tank mapping (Confirm
distance parameter (→  130)).
• Select Tank type (→  126) =
Process vessel with agitator.
• Increase integration time (Expert
→ Sensor → Distance → Integration
time)
• Optimize orientation of the antenna
• If necessary, select a better mounting
position and/or larger antenna.
During filling/emptying the
measxured value jumps
downwards
Multiple echoes • Check Tank type parameter
(→  126).
• If possible, do not select central
installation position.
• If appropriate, use a stilling well.
Error message F941 or S941
"Echo lost"
Level echo is too weak. • Check Medium group parameter
(→  127).
• If necessary, select a more detailed
setting in Medium property
parameter (→  138).
• Optimize alignment of antenna
• If necessary, select a better
installation position and/or larger
antenna.
Level echo suppressed. Delete mapping and record it again.
Device displays a level when
the tank is empty.
Interference echo Carry out mapping over entire
measuring range when the tank is
empty (Confirm distance parameter
(→  130)).
Wrong slope of the level in
the entire measuring range
Wrong tank type selected. Set Tank type parameter (→  126)
correctly.