Endress+Hauser Levelflex M FMP40 - Blocking Distance

Commissioning Levelflex M FMP40 FOUNDATION Fieldbus
66 Endress+Hauser
6.6 Blocking distance
Function "upper block. dist" (059)
For rod probes and for rope probes with lengths of up to 8 m, the upper blocking distance is set to
0.2 m at the factory. For rope probes with lengths of more than 8 m, the upper blocking distance is
preset to 2.5 % of the probe length. For media with DC > 7, the upper blocking distance for rod
and rope probes can be reduced to 0.1 m, if the probe is mounted flush with the wall or in a nozzle
of maximum 50 mm.
Blocking distance and measuring range
At the lower end of the probe there is no blocking distance but a transition region with reduced
accuracy, see section "Maximum measured error", → ä 67.
!
Note!
Within the upper and lower blocking distance, a reliable measurement can not be guaranteed.
For stilling well applications
The upper blocking distance (UB) is preset to 100 mm when the "bypass/pipe" parameter has been
selected in the "tank properties" (002) function.
⇒
ENDRESS + HAUSER
E
+
–
FMP40
LN [m]
min
LN [m]
max
UB [m]
min
Rope probe 135
1)
1) Larger measuring range available on request
0,2
2)
2) The indicated blocking distances are preset. At media with DC > 7, the upper blocking distance UB can be reduced
to 0.1 m for rod and rope probes. The upper blocking distance UB can be entered manually.
6 mm rod probe 0,3 2 0,2
2
16 mm rod probe 0,3 4 0,2
2
Coax probe 0,3 4 0