Metrohm 761 Compact IC - Manual (Page 59)

2.10 Connection of external devices
761 Compact IC
49
2.10 Connection of external devices
2.10.1 Connection of the 750 Autosampler
The 750 Autosampler available from Metrohm as an option is an auto-
matic sampler for ion chromatography. It accommodates max. 128
samples each of 730 µ L, which are automatically transferred to the
sample loop attached to the injection valve of the 761 Compact IC. The
samples on the 750 Autosampler are changed by a remote signal
which is outputted by the 761 Compact IC (761 Compact IC as "Mas-
ter").
In order to connect the 750 Autosampler the 6.2128.160 Cable which is
available as an option is additionally required. The 750 Autosampler is
connected to the 761 Compact IC as follows:
1 Electrical connection 761 – 750
• Connect 6.2140.010 Connector plug to contact closure strip 9
of the 750 Autosampler (see 750 Instructions for Use).
• Connect one end of the 6.2128.160 Cable to the connections
13 "EXTERNAL INJECT INPUT" and 14 "GND" on the connec-
tor plug. The two cable ends are appropriately inscribed with
"750" (white) and "GND" (brown).
• Connect the other end of the 6.2128.160 Cable to the remote
interface 24 of the 761 Compact IC (see Fig. 2).
2 Tubing connection 750 – injection valve
• Loosen rotary nipple 31 which is screwed onto the inner side
of connection 3 of the 761 Compact IC (see Fig. 3 and Fig. 4).
• Pull aspiration tubing 4 completely out from connection 3 and
screw it off from connection "1" of injection valve 32.
• Cut transfer tubing 8 (see 750 Instructions for Use) to the
shortest possible length between the needle of the 750 Auto-
sampler and injection valve 32 of the 761 Compact IC.
• Pull the free end of transfer tubing 8 through the opening of
connection 3 on the 761 Compact IC and screw it onto con-
nection "1" of injection valve 32 using a 6.2744.010 PEEK
compression fitting.
• Retighten rotary nipple on the interior side of connection 3 to
fix the transfer tubing.
3 Tubing connection injection valve – waste
• Insert 6.2744.020 Coupling (from 761 accessories) into
connection 3 of the 761 Compact IC.
• Screw aspirating tubing 4 onto the 6.2744.020 Coupling and
lead it into the waste container.