Metrohm 940 Professional IC Vario ONE/ChS/PP - Manual (Page 60)

3.20 Connecting and rinsing the guard column
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940 Professional IC Vario ONE/ChS/PP (2.940.1300)
NOTE
The guard column may not be connected until after the instrument has
already been put into operation once (see Chapter 3.19, page 49). The
guard column and separation column have to be replaced by a coupling
(6.2744.040) until then.
Accessories For this step you need the following accessories:
￭ Guard column (suitable for the separation column)
Connecting the guard column
1 Removing the coupling
Remove the coupling installed between the column input capillary
and the column output capillary for the initial start-up.
2 Preparing the guard column
￭ Remove the stopper and the sealing cap from the guard column.
3 Connecting the guard column
CAUTION
When inserting the guard column, ensure that it is inserted cor-
rectly based on the marked flow direction (if specified).
￭ Fasten the input of the guard column to the column input capil-
lary using a short pressure screw (6.2744.070).