Metrohm TitrIC 2 - Manual (Page 7)

Application Bulletin 286 e
Installation Instructions of TitrIC 2
Page 7/16
4 Tubing connections
4.1 External cell
The numbers given here (
,…
) and «opening 1,...» refer to the drawing below.
In the next step the external cell is prepared. The following components are inserted in the titration
vessel lid (6.1414.060):
The small 6.2730.030 stoppers (with the black rubber ring) are screwed loosely into openings 1, 2, 3, 5
and 7 and fixed in position when the buret tips, etc. are inserted.
The large 6.2730.080 stoppers are screwed into openings 4 and 8 and the screw nipple (6.2730.070)
into opening 9.
The titration vessel lid is attached to the stand support (6.2001.070) using opening 10, fixed at the
required height with the clamping ring and the horizontal brace of the stand support is mounted on the
855 with the socket head screw.
1 2
4
5
6
7
9
3
10
8
septum stopper
6.2730.020
screw nipple
6.2730.070
6.2730.080
screw nipple
6.2730.030
stopper
6.2740.020
rinsing nozzle
Numbers and connections on the titration vessel lid (6.1414.060)
The PTFE aspiration tip (6.1543.170, M8, supplied with 855) is inserted in opening 1 and
connected to membrane pump 2 of the 855 with the M8 PTFE tubing connection (6.1805.510,
supplied with 855).
The rinsing nozzle (6.2740.020, supplied with 855) is inserted into opening 2, which is
connected to membrane pump 1 of the 855 with the FEP tubing connection (6.1805.060,
supplied with 855).
The buret tip (6.1543.200) is inserted through opening 3 and connected to port 1 of the 20 mL
Dosing Unit (0.1 M HCl) with the FEP tubing connection (6.1805.100, supplied with 807).
This is where the pH electrode will later be inserted.
The rinsing nozzle (6.2740.020, supplied with 855) is inserted into opening 5, which is
connected to membrane pump 1 of the 855 with the FEP tubing connection (6.1805.060).
The septum stopper (6.2730.020) is pushed into opening 6.
The rinsing nozzle (6.2740.020, supplied with 855) is inserted into opening 7, which is
connected to membrane pump 1 of the 855 with the FEP tubing connection (6.1805.060).
This is where the 802 Rod Stirrer will later be inserted.
After the screw nipple (6.2730.070) has been screwed into opening 9, the aspiration tip
(6.1543.100) is pushed through it. An FEP tubing connection (6.1805.060, supplied with 855)
will be connected to the connection set of Dosing Unit port 4 of the 50 mL Dosing Unit.