Endress+Hauser Levelflex M FMP40 Operating Instructions Manual page 71

Levelflex M FMP40 with HART/4...20 mA
The measured values
for the interface and the
total level are identical
If the interface layers
are thin, the total level
jumps to the interface
level
Interface measured
value jumps
Endress+Hauser
F m/ft
expected
actual
E m/ft
F m/ft
expected
actual
E m/ft
F m/ft
actual
actual
expected expected
E m/ft
Echo threshold for the
total level too high
t →
The thickness of the
upper phase is less than
60 mm.
t →
Emulsion layer present
t →
Troubleshooting
Yes Check the DK value setting in
→
"Medium Properties" (003).
Yes Interface measurement is only possible
→
if the thickness of the interface is
greater than 60 mm.
Yes Emulsion layer affects the measurement.
→
Please contact Endress+Hauser.
71