Blocking Distance; Frequency Range - Endress+Hauser Levelflex M FMP41C Technical Information

Blocking distance

Frequency range

10
The upper blocking distance (= UB) is the minimum distance from the reference point of the measurement
(mounting flange) to the maximum level.
At the lowest part of the probe an exact measurement is not possible, see "Performance characteristics" on →
Page 17.
F = measuring span
E = empty distance (= zero)
UB = upper blocking distance
LN = probe length
B = minimum distance of the probe
to the container wall
Reference point of measurement, details → Page 30
Blocking distance and measuring range depending on type of probe, for DK ≥ 1.6 for FMP41C and
FMP45:
Probe type
min
Rod probe 1 (0.3)
Cable probe 3 (1)
Coax probe
1 (0.3)
(not FMP41C)
1) The blocking distances given are preset. For media with DK >7, the upper
blocking distance UB for rod and cable probes can be reduced to 4 inches
(0.1 m). The upper blocking distance UB can be entered manually.
Note!
Within the blocking distance, a reliable measurement can not be guaranteed.
100 MHz to 1.5 GHz
Reference point of
measurement
UB
E
LN
F
B
LN ft (m) UB ft (m)
max
13 (4) 0.7 (0.2)
115 (35)
0.7 (0.2)
FMP41C: 100 (30)
13 (4)
Levelflex M FMP41C, FMP45
100%
Max.
Remote display
FHX 40
0%
L00-FMP4xxxx-17-00-00-en-045
min
1)
1)
0
Endress+Hauser
67 ft ( 20 m)