Endress+Hauser Profi Bus Levelflex M FMP40 Operating Instructions Manual page 17

Levelflex M FMP40 PROFIBUS PA
"
!
Endress+Hauser
3.4.4 Mounting rope probes in a partially full silo
It is not always possible to empty a silo which is already in operation. Because the probe can be
turned in the threaded boss, it can also be mounted when the silo is only partially filled. In order to
avoid problems when Levelflex is mounted into a partially full silo, the following measures should
be taken:
• Mount when the silo is as empty as if possible. A minimum of 2/3 of the silo must be empty.
After mounting, map must be made should the installation conditions require it.
Caution!
If there is a risk of electrostatic discharge from the product, the housing must be earthed before the
probe is lowered into the silo.
Screw down
• If appropriate, screw the Levelflex into the
threaded flange.
• Maximum permissible torque:
– G3/4" : 45 Nm
– G1-1/2" : 450 Nm
When using an aramid fibre seal and a process
pressure of 40 bar:
– G3/4" : 25 Nm
– G1-1/2" : 140 Nm
• For flange mounting: if a seal is used, be sure
to use unpainted metal bolts to ensure good
electrical contact between probe flange and
process flange.
• When installing in metal silos, take care to
ensure good metallic contact between the
process connection and silo.
Insert probe
• Uncoil rope and lower it slowly and carefully
into the silo.
• Avoid tangles.
• Avoid any backlash, since this might damage
the silo fittings.
• If possible, make a visual check to see that the
rope has not tangled or is lying such that it can
knot when the level falls. This is
particularly important if a flange was not used.
Re-insert the probe if necessary.
• Screw the flange to the counterflange on the
nozzle.
Note!
Before full accuracy is obtained the probe rope must hang fully extended.
Mounting
Screw in Levelflex
housing allignable
Tighten with the
hexagonal nut only
L00-FMP4xxxx-17-00-00-en-058
Uncoil rope and lower
probe slowly and
carefully into the silo.
Avoid tangles or knots.
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