16
pound� Note: such substances may migrate into the medium� Make sure that they
are harmless�
When using mechanical means of securing (e�g� tooth lock washer), protruding
edges must be avoided� They may cause interference reflection�
Installation of the coaxial pipe
6.2.2
(only necessary if the unit is to be operated with coaxial probe)
The coaxial pipe and the rod must be of the same end length� The coaxial
pipe can be shortened (→ 6.3.2).
Screw the rod to the unit and tighten
►
it� Recommended tightening torque:
4 Nm�
Slide the sensor sealing (A) onto
►
the thread�
Slide the coaxial pipe (B) onto the
►
rod� Carefully center it and carefully
move the rod through the centring
piece (C) (for lengths > 140 cm
through both centring pieces) of the
coaxial pipe� Do not damage the
centring pieces�
Screw onto the sensor thread and
►
tighten�
A
C
B
32
32
Shortening of the probe
6.3
Shortening of the rod
6.3.1
The rod can be shortened to adapt to different tank heights� NOTE: ensure that
the rod length is not below the minimum permissible length of 10 cm (Lmin)�
Proceed as follows:
Screw the rod to the unit�
►
Mark the desired length (L) on the rod� The reference point is the lower edge of
►
the process connection�
Remove the rod from the unit�
►
Shorten the rod�
►
Remove all burrs and sharp edges�
►