Endress+Hauser Solicap M FTI56 - Page 28

Installation Solicap M FTI55, FTI56
28 Endress+Hauser
3.9.5 Measuring conditions
!
Note!
• When installing in a nozzle, use inactive
length (L3).
• To control a screw conveyor (s mode),
rod probes and rope probes can be used.
The on-value and off-value are
determined by the empty and full calibration;
– Partially insulated probes are only suitable
for nonconductive bulk solids.
• The minimum capacitance change for
level limit detection must be  5 pF.
Minimum probe length for nonconductive media (<1s/cm)
l
min
= C
min
/ (C
s
* [r - 1])
DK > 10 Measuring range up to 4 m
5 < DK < 10 Measuring range up to 12 m
2 < DK < 5 Measuring range up to 20 m
TI418F41
l
min
= Minimum probe length
C
min
=5 pF
C
s
= Probe capacitance in air (see also  ä 81, "Technical data")
r = Dielectric constant e.g. dried grain = 3.0
L3
L1
MIN
OFF
ON
Ds