Description Of Product And Materials; Installation And Start Up Procedures; Fitting The Sensor Into The Housing; Installation Of The Housing - Mettler Toledo InFlow 751 Instructions D'utilisation

4
– The materials used for the housing are
described in Section 3, «Description of
product and materials».
Make sure the materials are suitable
for the required application.
– To ensure that the housing is correctly
installed and maintained, follow the in-
structions given in this leaflet.
– Incorrect handling of the housing can
result in a broken sensor and leakage
from the vessel.
– Before doing anything to the installed
housing, ensure that the process
facility is in a safe condition (release
pressure, empty, rinse, vent, purge,
etc.).
– Use only clean sensors, housings and
sockets. Replace any damaged seals
and housing components immediately.
– Before starting up, always check the
measuring system. Inspect the hous-
ing/sensor assembly and check for
leaks from housing and apparatus.
– If ever in doubt, consult your supplier.
3. Description of product and
materials
The insertion housings InFlow 751 serve as
enclosures for METTLER TOLEDO sensors
used for pH, redox and dissolved oxygen,
conductivity and turbidity measurements,
particularly in industrial waste water.
All parts of the housing in contact with the
process (wetted parts) are made of PVC, or
PVDF according to order specification.
O-rings in contact with the process medium
are made of Viton
© 04/17 Mettler-Toledo GmbH, CH-8902 Urdorf
Printed in Switzerland
® .
4. Installation and start up
procedures
The housing is delivered completely assem-
bled. To fit the sensor, and to install the
housing proceed as follows:

4.1. Fitting the sensor into the housing

(see figure 1)
When installing 12 mm sensors with
PG13.5 ensure that the white (PTFE-)
washer is positioned directly beneath the
12 mm sensor head, with the tapered
(chamfered) face pointing downwards.
Then follows the O-ring.
Screw the sensor with Pg13.5 or NPT1"
thread hand-tight into the housing.
Put the housing into the T-piece and tighten
the cap nut.
Screw the sensor with NPT ¾" thread later-
ally directly into the T-piece.
Connect the cable socket to the sensor.
For the removal of the sensor, carry out the
above procedure in the reverse order

4.2 Installation of the housing

The housing can be directly fixed to the pipe
by means of a bonding agent (PVC) or by
welding (PVDF)
For installation of the InFlow 751 in a pipe,
please follow th instructions of the pipe sup-
plier.
InFlow 751
InFlow 751
52 400 740