Changing The Electrolyte, The Membrane Body Or The Interior Body - Mettler Toledo InPro 6950 Serie Bedienungsanleitung

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Many sample media contain volatile substances
which, even at very low concentrations, have a
clearly perceptible smell. Similarly to oxygen, these
substances are able to invade the electrolyte through
the gas-permeable membrane. Accordingly, they
become noticeable when changing the electrolyte.
In most cases, such substances have absolutely no
i nfluence on the measuring properties of the sensor.
Slight discoloration of the electrolyte also has no ef-
fect on the measuring properties.
6.2 Changing the electrolyte, the membrane body
or the interior body
h
Note: The InPro 6950 uses a special electrolyte
which contains an oxygen scavenger. This electrolyte
ensures fast response time and together with the
guard ring increases the signal stability of the sensor.
The electrolyte must be exchanged on a regular basis
or when the sensor has been exposed to the air for
more than 24 hours without a watering cap or if the
sensor has been stored for several months.
h
Note: The content of the electrolyte bottle has to be
used within 3 months after opening.
If the membrane and/or the interior body exhibits
signs of failure (long response time, increased cur-
rent in an oxygen-free medium, mechanical damage,
etc.) the membrane body and/or the interior body
has to be replaced.
Warning! The O
Contact of electrolyte with mucous membrane or eyes
is to be avoided. Therefore protective gloves and
safety glasses have to be worn for the following
dismantling works.
If such contact occurs, the affected area should be
well rinsed with water. In the case of accident, or
should ever any adverse signs appear, get immediate
medical attention.
When changing the electrolyte, the membrane body
or the interior body, please observe the following
instructions (see also the following illustration):
Attention! Make sure that this maintenance step is
carried out in clean place.
1. Unscrew the cap sleeve from the sensor shaft
and carefully pull it off the sensor.
2. Pull off the membrane body from the interior
body. If it is tight-fitted, eject by pushing it with
the flat fi nger tip. Before electrolyte is refilled, the
membrane body must be removed from the cap
sleeve!
InPro 6950
52 206 137 F
InPro 6950 Series O
electrolyte has an alkaline pH value.
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© 02 / 2023 METTLER TOLEDO
Sensor 12 mm
2
Printed in Switzerland