Endress+Hauser Levelflex M FMP40 Interface Brief Operating Instructions page 28

Commissioning
If the DC value is less than 7 for rope probes, then measurement is not possible in the area of
the tensioning weight (0 to 250 mm from end of probe; lower blocking distance).
Deviating from this, the following measured error occurs for thin interface layers (only
"K" interface measurement electronics version):
±50
±40
±30
±20
±10
5.4.9 Function "Medium Property" (003)
ENDRESS + HAUSER
–
+
E
Use this function to enter the dielectric constant of the upper medium (upper phase).
Options:
• 2.00
The tables below split the DC values by product group. However, it is not sufficient to
assume a typical value. For accurate interface measurement, it is necessary to deter-
mine the DC of the upper medium (upper phase) as accurately as possible and enter
the value in this function.
28
0
thickness of upper medium
⇒
rod probe (example), also valid for coax probe
No measurement
upper
possible in
medium
this area
200 60
[mm]
Levelflex M FMP40 4...20 mA HART
lower medium
0
Interface
L00-FMP4xIxx-05-00-00-de-001
Endress+Hauser