Endress+Hauser Levelflex M FMP40 Operating Instructions Manual page 88

Trouble-shooting
Device displays a
level when the
tank is empty.
Measured value
incorrect (slope
error in the entire
measuring range)
88
20 mA/100%
actual
expected
t →
4 mA/0%
L00-FMP4xxxx-19-00-00-en-020
20 mA/100%
expected
2.) actual
1.) actual
t →
4 mA/0%
L00-FMP4xxxx-19-00-00-en-021
Levelflex M FMP40 with HART/4...20 mA
Incorrect probe length
Tank properties
incorrect.
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