Changing The Electrolyte, The Membrane Body Or The Interior Body - Mettler Toledo InPro 6900 Série Instructions D'utilisation

InPro 6900 Series O
6.2 Changing the electrolyte, the membrane body
or the interior body
Note: The InPro 6900 uses a special electrolyte which
contains an oxygen scavenger. This electrolyte en-
sures 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.
Note: The content of the electrolyte bottle has to be used
within 3 months after opening.
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.
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
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 3/8" 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.
© 05 / 15 Mettler-Toledo AG
Printed in Switzerland
Sensor 12 mm
2
electrolyte has an alkaline pH value.
2
23
InPro 6900
52 201 029