Metrohm TitrIC pro III - Manual (Page 6)

Application Bulletin 355
Installation Instructions for TitrIC pro III
Page 6 of 14
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 Unit
 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 1 / tower 2 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).
The two 80-cm-FEP-tubing connections
(6.1850.110) supplied with the 815 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 separately 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 850) 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 850 Professional IC
instrument. 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
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