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

Levelflex FMP53 HART
Endress+Hauser
13.2.2

Cleaning the probe outside the tank

The probe can be disassembled so it can be cleaned better.
The disassembly requires the following tools:
• vise with fiber braces (surface protection for the polished probe rod)
• hook wrench  54 mm (21 in)
• open-ended wrench AF27 / AF32 with a torque adjustement up to 20 Nm
Caution!
• Before disassembly, it has to be made sure that the
supply voltage for the instrument is switched off!
• When releasing the slotted nut (1) make sure to
counterhold at the process connection ring (5) with
an open-ended wrench as the adapter (3) could
otherwise be released from the flange.
Unmounting the electronics housing
• Unscrew the grooved nut with a hook wrench.
• Remove the unscrewed housing (2) together with
the housing adapter from the adapter (3) of the
process connection. The housing adapter is still
connected with the housing. For the remote
version: remove only the cable adapter.
• Replace O-ring (7) where necessary.
Order code: see Device Viewer →  93.
Disassembly of the rod probe
• Unscrew adapter (3) from the process connection
(as example: flange): unscrew adapter at the
wrench faces with hook wrench (AF27) and pull it
out of the tank together with the rod probe (length
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! Do not damage the surface by scratching or
denting it.
• Unscrew adapter (3) from the probe rod (approx.
12 rotations counter-clockwise) and remove (plug
connection). The probe rod is screwed in the
insulating bush with 4.5 Nm.
• The O-rings (6) of the probe rod and adapter are
now freely accessible and can be exchanged if
necessary. The probe rod can be cleaned
(autoclaved).
Order code of the O-rings: see Device Viewer
→  93.
Assembly of the probe
The assembly is done in reversed order:
• Screw adapter (3) with 4.5 Nm on the probe rod
(4).
• Screw the adapter into the container process
connection together with the probe rod and tighten
with 20 Nm.
• Stick housing (2) with housing adapter on the
adapter and bolt it with the grooved nut (1) -
torque 20 Nm.
2
GT18/GT19/GT20
1
7
5
Maintenance
3
6
6
4
A0014988
91