Cleaning The Probe Outside The Vessel - Endress+Hauser Levelflex FMP53 Operating Instructions Manual

Maintenance
78
13.3.2

Cleaning the probe outside the vessel

The probe can be removed for better cleaning.
The following tool is required for cleaning:
• Vise with fiber jaws (surface protection for the polished rod probe)
• Hook wrench with lug  54 mm (2.1 in)
• Open-ended wrench AF27/AF32 with torque setting up to 20 Nm
Caution!
• Before starting work, make sure that the power
supply for the device is switched off.
• When unscrewing the slotted nut (1), make sure to
provide counter-support at the process connection
ring (5) with an open-ended wrench. Otherwise
the adapter (3) will become detached from the
flange.
Disassembling the electronics housing
• Unscrew the slotted nut (1) with the hook wrench.
• Remove the loosened housing (2), together with
the housing holder, from the adapter (3) of the
process connection towards the top. The housing
holder remains connected to the housing. Put the
housing to one side. In the case of the "Remote
sensor" version, only the cable adapter must be
removed.
• Replace the O-ring (7) if necessary.
Order number: see Device Viewer →  80
Disassembling the rod probe
• Unscrew the adapter (3) from the process
connection (the flange in the example): at the
wrench flats unscrew the adapter with an open-
ended wrench (AF27) and remove from the vessel
together with the probe rod (max. 4 m).
• Clamp the probe rod (4) at the wrench flats or use
fitting pliers.
Caution: Protect the surface of the polished probe
rod! It must not be damaged by scratches or
denting.
• Unscrew the adapter (3) from the probe rod
(approx. 12 turns in the counter-clockwise
direction) and remove it (plug-in connection). The
probe rod is screwed into the insulating bush with
4.5 Nm.
• The O-ring seals (6) of the probe rod and adapter
are now freely accessible and can be exchanged if
necessary. The probe rod and adapter can be
autoclaved.
Order numbers of O-rings: see Device Viewer
→  80
Probe mounting
Assembly is the reverse of the disassembly sequence:
• Screw the adapter (3) onto the probe rod (4) with
4.5 Nm.
• Screw the adapter together with the probe rod into
the vessel process connection and tighten with 20
Nm.
• Fit the housing (2) along with the housing holder
onto the adapter and screw together with the
slotted nut (1); torque 20 Nm.
Levelflex FMP53 PROFIBUS PA
2
GT18/GT19/GT20
1
7
5
Endress+Hauser
3
6
6
4
A0014988