Endress+Hauser Levelflex M FMP 40 Operating Instructions Manual page 86

9 Trouble-shooting
Device displays a
level when the
tank is empty.
Measured value
incorrect (slope
error in the entire
measuring range)
86
20 mA/100%
actual
expected
4 mA/0% t
20 mA/100%
expected
2.) actual
1.) actual
4 mA/0% t
Levelflex M FMP 40 with PROFIBUS-PA
Incorrect probe
length
Tank properties incor-
rect.
Medium properties
incorrect.
1. Carry out automatic probe length
detection when the tank is empty.
2. Carry out mapping over entire probe
when the tank is empty (probe free).
LN < 4 m and "Aluminium tank" tank
properties selected
→
Calibration not possible.
→
Selection
→
Select standard
→
Thresholds too high
Select lower medium properties.
Endress+Hauser