Metrohm TitrIC pro II - Manual (Page 6)

Application Bulletin 354
Installation Instruction of TitrIC pro II
Page 6 of 14
The PTFE aspiration tip (6.1543.170, M8) is
inserted in opening 7, which is connected via the
distributor (6.1808.170) to the membrane pump 2 /
tower 1 of the 815 with the M8-PTFE-tubing
connection (6.1805.510, 60 cm).
This opening is not used. It can be closed with a
stopper (6.2709.090)
After the screw nipple (6.2730.080) has been
screwed into opening 9, the 802 Rod Stirrer
(2.802.0020) is pushed through it and connected
to the tower 1 stirrer connection of the 815 Robotic
USB Sample Processor.
4.2. Installation of the 50 mL Dosing Unit
Fig.: Connections on the bottom of the 50 mL Dosing Units
 Port 1 is used for transferring the sample to the
external titration vessel using FEP-tubing 6.1805.110
(80 cm, supplied by the 815 Sample Processor)
 Port 2 is used for aspirating the sample via conductivity
flow through cell which is connected to the titration arm.
The FEP-tubing 6.1805.110 is used here (80 cm, again
supplied by the 815 Sample Processor).
 Port 3 is used by for sample transfer to the IC system.
The transition from M6 to the IC screw size (1/16 in.) is
achieved with the 6.2744.080 adapter. A PTFE-capillary
(0.75 mm ID) is used to aspirate the sample from the T
piece at the swing arm through the anion injection valve
into the 50 mL Dosino. At the T piece the adapter M6
thread to UNF 10/32 (6.2744.080) is used.
 Port 4 requires a coupling between Luer and M6
(6.1808.280): This port is used for emptying the Dosing
Unit into the waste canister. Herefore the FEP-tubing
(6.1805.030) with 150 cm length is used.
Once the tubing connections have been made, the Dosing
Unit is attached to the Dosino holder (6.2057.210) with the
thread adapter 6.1618.020.
4.3. Overview of all the tubing connections
The three 60 cm FEP-tubing connections
(6.1850.060, supplied with the 815) are used to
connect the membrane pump 1 / tower 1 of the 815
and the three rinsing nozzles (6.2740.020, supplied
with 815) to the openings 1,3, and 5 of the external
cell (see chapter 4.1).
The 60 cm M8-PTFE-tubing connection
(6.1805.510) is used to connect the membrane
pump 2 / tower 1 of the 815 and the M8-PTFE-
aspiration tip (6.1543.170) to the opening 7 of the
external cell (see chapter 4.1).
The Robotic Arm (6.1462.040) is equipped with a
PEEK aspiration tube (6.1835.050). The aspiration
tube can be mounted using the screw nut
(6.2629.000) and the needle holder (1/8 in with
tubing connection M6, 6.2833.020). The coupling
piece with two outer M6 connections (6.1808.010)
is used to connect the needle to the T Connector
M6 (6.1808.060).
Two 80-cm-FEP-tubing connections (6.1850.110)
are used to connect the T piece (6.1808.060) at
the robotic arm with the flow-through cell
(6.2763.000) for the conductivity measurement and
the flow-through cell with the 50 mL Dosino at Port
2. The third 80-cm-FEP-tubing (6.1850.110,
supplied with the 815) is used to connect the 50
mL Dosino Port 1 to the external titration vessel at
the left of the 815
The 40-cm-FEP-tubing connection (6.1805.100,
supplied with the Dosing Unit) is used to connect
port 1 of the 20 mL Dosing Unit (0.1 mol/L HCl)
with the 3-way stopper in the external cell (opening
6 in chapter 4.1)
The 150-cm-FEP-tubing connection (6.1805.030)
is used to connect port 4 of the 50 mL Dosing Unit
to the 10 L PE waste canister (6.1621.000,
supplied with the 815).
Suitable lengths of the 0.97 mm PTFE capillary
(6.1803.020, supplied with the 881) are used to
connect port 3 of the 50 mL Dosing Unit (using the
screws 6.2744.080 and 6.2744.070) and the
injection valves of the 881 Compact IC pro
M6: Port 2
Luer: Port 4
6.5620.000
6.1805.110
Port 3
Port 1 6.2744.080
6.2744.070
6.1803.020
6.1805.030