Metrohm 881 Compact IC pro – Anion - Manual (Page 65)

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3 Installation
881 Compact IC pro – Anion
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Note
The guard column may only be installed after the initial start-up (see
Chapter 4.1, page 58) of the instrument. Until then, use the coupling
(6.2744.040) instead of the guard and separation column.
Note
Metrohm recommends, always to work with guard columns. These pro-
tect the separation column and can be exchanged regularly.
Connecting and rinsing the guard column
1 Connecting the guard column
Caution
When inserting the guard column, always ensure that it is inserted
correctly corresponding to the flow direction (if indicated).
￭ Remove sealing caps and/or stoppers from the guard column.
￭ Fasten the input of the guard column to the column inlet capillary
(3-2) using a short PEEK pressure screw (6.2744.070).
￭ In case the guard column is mounted on the separation column
with a connecting capillary, connect the included connection
capillary, which is included with the guard column, to the output
of the guard column using the PEEK pressure screw, which is .also
included.
2 Rinsing the guard column
￭ Place beaker under the outlet capillary of the guard column.
￭ Set the flow rate of the high pressure pump according to the data
given in the leaflet of the separation column.
￭ Start the high pressure pump and rinse the guard column approx.
5 minutes with eluent.
￭ Switch off the high pressure pump again.