Metrohm 820 IC Separation Center - Manual (Page 79)

4.2 Maintenance and servicing
819 IC Detector / 820 IC Separation Center
71
4.2.5 Changing separating columns
Identical separation system
If you wish to replace an IC separating column by a column of the same
type, proceed as follows (see Fig. 21 and Fig. 23):
1 Remove old column
• Switch off pump drive of the 818 IC Pump.
• Unscrew column from inlet capillary 57 of the detector block
or from suppressor inlet capillary 64.
• Unscrew column from column connection capillary 50 or the
precolumn.
2 Connect new column to injector
• Remove end caps from column 53.
• Screw inlet end of separating column 53 (note flow direction)
to column connection capillary 50 or to the precolumn (see
Section 2.9.5/Section 2.9.7).
3 Rinse column
• Place beaker beneath the column outlet.
• Switch on 818 IC Pump and rinse column with eluent for ca.
10 min, then switch off pump.
4 Connect column to detector block
• Screw outlet end of separating column 53 to inlet capillary 57
or suppressor inlet capillary 64.
Changing the separation system
If you wish to replace an IC separating column by a column of a differ-
ent type, proceed as follows (see Fig. 21 and Fig. 23):
1 Remove old column
• Switch off pump drive of the 818 IC Pump.
• Unscrew column from inlet capillary 57 of the detector block
or from suppressor inlet capillary 64.
• Unscrew column from column connection capillary 50 or the
precolumn.
2 Connect detector block to injection valve
• Connect column connection capillary 50 using a 6.2744.040
Coupling 71 directly to inlet capillary 57 of the detector block
(see Fig. 21).
3 Rinse with dist. H
2
O
• Rinse IC system with dist. or deionized water (flow rate
1 mL/min) for approx. 10 min.
4 Rinse with eluent
• Rinse IC system with the eluent needed for the separating
column you intend to install until the absolute conductivity
displayed on the 819 IC Detector is stable.