Metrohm 812 Valve Unit - Manual (Page 14)

2.4 Connections at injection valve
812 Valve Unit
11
2 1
4 5
3 6
13 14
15
17 16
Fig. 5: Connection at injection valve
13 Syringe tubing
6.1803.020 PTFE tubing with
6.2744.120 coupling and
6.2816.020 syringe
16 Eluent outlet
6.1831.010 PEEK
capillary
14 Aspirating tubing
6.1803.020 PTFE tubing for
aspirating the sample
17 Eluent inlet
6.1831.010 PEEK
capillary
15 Sample loop
6.1825.210 PEEK sample
loop (20 µ L )
2 Connecting the aspirating tubing
• Cut off a piece of the 6.1803.020 PTFE capillary to the de-
sired length (at best using the optionally available 6.2621.080
tubing cutter) and fit it on one side with a 6.2744.010 PEEK
compression fitting (do not tighten too firmly).
• Screw this end of the aspirating tubing 14 to connection 2 of
the injection valve.
3 Connecting the sample loop
• Fit the 6.1825.210 sample loop on both sides with a
6.2744.010 compression fitting.
• Screw the sample loop 15 (20 µ L) to connections 3 and 6 of
the injection valve.
4 Connecting the eluent supply
• Screw the PEEK capillary 17 for eluent supply from the high
pressure pump to connection 5 of the injection valve.
5 Connecting the separating column
• Screw the PEEK capillary 16 for eluent supply to the separat-
ing column to connection 4 of the injection valve.