Functions; Integration In Measuring System; Start-Up; Installation - Mettler Toledo InPro 6050 Serie Bedienungsanleitung

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3.2

Functions

This sensor technology is based on a polarographic
O measurement (Clark type), which can be summa-
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rized as follow:
• It consists of a working electrode (cathode), a
counter electrode (anode) and an oxygen perme-
able membrane which separates the electrodes
from the medium.
• The transmitter supplies a constant voltage to the
cathode (polarization voltage). We recommend a
–675mV polarization voltage for aqueous appli-
cations.
• The oxygen molecules migrate from the medium
to the electrodes through the membrane and are
reduced at the cathode. At the same time an oxi-
dation takes place at the anode. The electrolyte
completes the electric circuit between the anode
and the cathode.
3.3

Integration in measuring system

A complete measuring loop consists of a sensor,
a cable and a transmitter
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Start-up

4.1

Installation

Before installation, we recommend you to:
• change the electrolyte as described in § 6.3 (you
do not need to change the membrane body)
• visually check the membrane for cracks or in-
dents (in case of damaged membrane, the mem-
brane body must be changed)
The sensor can be installed in pipes by using a
flow-through housing (InFlow™ 751) or a statio-
nary housing (InFit™ 761). The sensor can also be
immersed directly in a tank by using an immersion
housing (InDip™ 550/524).
Please refer to the instruction manuals of these
housings for installation instructions.
a
Caution: to guarantee a tight seal, a washer must be
used together with an O-ring.
The sensor should be installed in a place where there
is enough fluid circulation (at least 1liter per hour
should pass by the head of the sensor). Placing the
sensor in a dead spot would lead to false results.
If the sensor is installed in a pipe, it is preferable to
install it at an angle against the flow to achieve the
best possible measurement.
InPro 6050
52 200 251 D
InPro 6050 Series O
© 03 / 2023 METTLER TOLEDO
Printed in Switzerland
Sensor
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