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28
6.2
Changing the electrolyte, the membrane body
or the interior body
METTLER TOLEDO DO sensors are supplied with fitted
membrane body and have been checked for proper
function.
However, if a sensor is to be stored for several months,
the electrolyte should be replaced before use.
If the membrane exhibits signs of failure (long response
time, increased current in an oxygen-free medium,
mechanical damage, etc.) the membrane body has
to be replaced.
a
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 instruc-
tions (see also the following illustration):
a
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 finger
tip. Before electrolyte is refilled, the membrane body
must be removed from the cap sleeve.
3. Rinse the interior body with demineralized water
and carefully dab it dry with a paper tissue.
h
Note: steps 4 to 7 may only be carried out when
changing the interior body.
4. Unscrew the retainer nut of the interior body with an
adjustable wrench or with a 3/8" wrench.
5. Remove the interior body by pulling it out of the
sensor shaft. If necessary use a plier.
a
Warning! Do not twist the interior body.
Otherwise the connection pins can be damaged.
InPro 6800
52 200 953 C
InPro 6800 O
electrolyte has an alkaline pH value.
2
© 02 / 2023 METTLER TOLEDO
Sensor 12/25 mm
2
Printed in Switzerland
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