Metrohm 790 Personal IC - Manual (Page 39)

2 Installation
790 Personal IC
30
2.7 Precolumns and separating columns
2.7.1 General information on precolumns
The use of easily exchangeable precolumns protects the separating
columns and prolongs their lifetime. The precolumns available from
Metrohm (see section 6.3.2) are either real precolumns or precolumn
cartridges, which are used together with the 6.2821.040 Cartridge head
or the 6.2828.010 Precolumn cartridge holder.
New IC precolumns are normally filled with solution and sealed at
both ends. Before the precolumn is installed in the system, it must be
ensured that this solution is freely miscible with the eluent used
(check manufacturer's specifications).
2.7.2 Precolumns with cartridge head
The 6.1005.020, 6.1005.040, 6.1005.050, 6.1007.010 and 6.1010.010
Precolumn cartridges are installed in the 6.2821.040 Cartridge head as
follows (see Fig. 11):
1 Prepare separating column
• Remove end caps from separating column 63 63 63 63.
• Unscrew fastening screw from column inlet.
• Take steel connector 56
56 56 56 for ferrule out of fastening screw.
2 Install cartridge
• Remove end caps for precolumn cartridge 59 59 59 59 (the steel mesh
58 58 58 58 and gaskets 57 57 57 57 are already installed in the cartridge).
• Mount steel spacer 60 60 60 60 on Manufit pressure screw 62 62 62 62 (the
steel mesh 61 61 61 61 and gaskets 57 57 57 57 are already installed in the
pressure screw).
• Mount precolumn cartridge 59 59 59 59 on the steel spacer 60 60 60 60 (com-
ply with flow direction if specified on the precolumn).
• Screw Manufit pressure screw 62 62 62 62 firmly to separating column
63 63 63 63.
• Mount steel connector 56 56 56 56 for ferrule on the inlet side of the
precolumn cartridge 59 59 59 59.
• Screw on Manufit housing 55 55 55 55 with Manufit pressure screw 62 62 62 62.