Parametrization Errors - Endress+Hauser Levelflex FMP53 HART Operating Instructions Manual

Levelflex FMP53 HART
Endress+Hauser
12.1.2

Parametrization errors

Parametrization errors for level measurements
Error
Measured value wrong
No change of the measured
value when emptying/filling
the tank
The diagnostic message
Echo lost appears after
switching on the supply
voltage.
Device displays a level when
the tank is empty.
Wrong slope of the level in
the entire measuring range
Possible cause
If measured distance(Setup
→ Distance) matches the real
distance:
Calibration error
If measured distance (Setup
→ Distance) does not match the real
distance:
An interference echo affects the
measurement.
An interference echo affects the
measurement.
Build-up at the probe.
Error in the echo tracking
Echo threshold too high.
Level echo suppressed.
Incorrect probe length
Interference echo
Wrong tank type selected.
Diagnostics and troubleshooting
Remedial action
• Check and adjust the Empty
calibration parameter (→  118) if
necessary.
• Check and adjust the Full calibration
parameter (→  118) if necessary.
• Check and adjust linearization if
necessary (Linearization submenu
(→  133)).
Perform mapping (Confirm distance
parameter (→  121)).
Perform mapping (Confirm distance
parameter (→  121)).
Clean the probe.
Deactivate echo tracking: Expert
→ Sensor → Echo tracking → Evaluation
mode = History off).
Check the Medium group parameter
(→  117).
If necessary select a more detailed
setting in the Medium property
parameter (→  127).
Delete mapping and record new
mapping curve if required (Record map
parameter (→  122)).
Carry out probe length correction
(Confirm probe length parameter
(→  148)).
Carry out mapping over entire probe
while the tank is empty (Confirm
distance parameter (→  121)).
Set Tank type parameter (→  116)
correctly.
79