Metrohm 2.946.0010, Manual

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4 Installation
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17
a) Assembling the electrode holder
CAUTION
Before assembling the electrode holder make sure that all parts are
completely dry. Check especially
￭
the connection socket for the SPE (5- 2 )
￭
the slot in the silicone seal (5- 4 )
for solution. Liquid entering the connection socket for the SPE (5- 2 ) can
damage the electrode holder.
1 Place the silicone seal (5- 4 ) in the shaft of the SPE holder (5- 1 ) . The
two pins (5- 3 ) support the positioning of the seal in the shaft and
prevent it from turning out of position.
2 Place the supporting ring (5- 5 ) on top of the seal with the planar side
pointing towards the seal. The two pins (5- 3 ) support the position-
ing. The slot in the supporting ring has to be congruent with the slot
in the silicone seal.
3 Place the nut (5-
6
) on the shaft. Do not tighten the nut, otherwise
the SPE cannot be assembled with the holder.
b) Assembling the SPE
CAUTION
Always hold screen-printed electrodes at the edges, in order not to
touch the active electrode surface.
1 Align the screen-printed electrode with the symbol on the shaft of
the electrode holder. The symbol and the electrode surface have to
point in the same direction.