Changing The Electrolyte, The Membrane Body Or The Interior Body - Mettler Toledo InPro 6000G Serie Instructions D'utilisation

InPro 6800 G / 6850i G / 6900i G / 6950i G O
6.2 Changing the electrolyte, the membrane body
or the interior body
Note: The InPro 6900i G and 6950i G use a special
electrolyte. This electrolyte ensures fast response time
and together with the guard ring increases the signal
stability of the sensor. The electrolyte must be ex-
changed on a regular basis or when the sensor has
been exposed to air for more than 24 hours without a
watering cap filled with conditioning solution.
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
value. 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 immedi-
ate 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 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.
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 9 mm wrench.
5. Remove the interior body by pulling it out of the
sensor shaft. If necessary use a plier.
Warning! Do not twist the interior body. Other-
wise the connection pins can be damaged.
6. Insert the new interior body in the sensor shaft. Turn
the interior body in the shaft until the slit of the interior
body is aligned with the pin placed in the shaft.
© 09 / 09 Mettler-Toledo AG
Printed in Switzerland
electrolyte has a slight alkaline pH
2
12 mm
2
InPro 6000 G – Series
52 206 477
25