Metrohm TitrIC pro II - Manual (Page 7)

Application Bulletin 354
Installation Instruction of TitrIC pro II
Page 7 of 14
instruments. The injection valves are connected in
series and finally connected to the T-piece
(6.1808.060) at the robotic arm (using the screws
6.2744.080 and 6.2744.070). In this setup and
methods the following sequential arrangement was
implemented: T-piece – anion injection valve –
cation injection valve – 50 mL Dosino.
5. Miscellaneous
5.1. Membrane Pumps of the 815
The membrane pump 1 at tower 1 is used to supply the DI
water for rinsing of the external vessel; the membrane pump
2 is used to empty the external vessel.
Connect the membrane pump 2/tower 1 to the left connector
of the Distributor leading to the M8 aspiration tip for
emptying the external vessel. The upper part of the
membrane pump 2 is connected to the waste canister.
The upper part of membrane pump 1 is connected to the
right connector of the Distributor leading to the three M6
rinsing nozzles to rinse the external vessel. The lower part
of the membrane pump 1 is connected to the DI-water
canister.
5.2. Stirrer
The 802 Rod Stirrer is inserted through opening 9 of the
external cell, and connected to the tower 1 of the 815. The
propeller (6.1909.050) is pushed on from below.

Length of the aspiration tips in the external cell
 Clamp the titration vessel to the titration vessel lid.
 The M8 aspiration tip in opening 7 must reach right to
the base of the titration vessel, as this is the only way to
ensure that the external cell is cleaned properly.
 The 3-way stopper with antidiffusion valve in opening 6
should reach the middle of the titration vessel.
5.3. Electrodes
 The pH electrode (iAquatrode Plus with Pt 1000;
6.0277.300) is inserted into opening 4. The cable is
connected with the 854 iConnect (provided with the
905) to the 905 Titrando at the rear on measuring input
1.
 If the electrode is not used for some time then it should
be returned to its holder and kept in the storage solution
(6.2323.000).
 The electrode has to be filled up regularly with the
electrolyte solution (6.2308.020).
 Conductivity cell (6.0915.100): The measuring cell
cable is connected to the opening marked ‘
Cond. Cell ’ of
the 856 Conductometer. The measuring cell is inserted
into the flow-through cell (6.2763.000). The flow-
through cell itself is mounted on the rod of the stand
support (6.2001.070).