Blocking Distance - Endress+Hauser Levelflex M FMP45 Operating Instructions Manual

Levelflex M FMP45 with HART/4...20 mA
⇒
ENDRESS + HAUSER
–
+ E
!
Endress + Hauser
6.5

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 preset
to 0.2 m on delivery.
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" on → ä 54.
FMP45
Rod probe
Rope probe
Coax probe
1) The indicated blocking distances are preset. At media with DC > 7, the upper blocking
distance UB can be reduced to 0.1 mm for rod and rope probes. The upper blocking
distance UB can be entered manually.
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.
LN [m]
min max
0,3 4
1 35
0,3 4
Commissioning
UB [m]
min
1)
0,2
2)
0,2
0
53