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Moving the adapter in the
column
The following procedures explain how to move the adapter downwards and upwards
in the column for routine procedures such as emptying and cleaning.
The following procedures are general for the movement of the adapter and
shall not be applied to packing and unpacking procedures. Instead see the
appropriate descriptions in Chapter 4.
Note:
CAUTION
High pressure. Never move the adapter in a column while mechan-
ical locking equipment is fitted. Remove the mechanical locking
equipment first.
NOTICE
Never force the adapter into the column manually. Only use hy-
draulic pressure as described in this Operating Instructions to move
the adapter in the column tube.
Moving the adapter downwards in the column
Movement of the adapter downwards in the column in non-packing operations is done
as follows:
1
Open the bottom mobile phase inlet/outlet in the bottom plate and connect a tubing
from this outlet to waste.
2
Ensure that the inlets/outlets in the top plate, including the top mobile phase in the
adapter rod, are sealed.
3
Connect one end of a tubing to the hydraulic chamber inlet on the side of the top
bayonet. Connect the other end of the tubing to a system or pump.
4
Pump in hydraulic liquid (typically 20% (v/v) ethanol or 0.01 M NaOH), at a slow flow
rate to begin with, while at the same time checking on the pressure. Increase the
flow rate as appropriate while maintaining a low column pressure. Do not run the
adapter faster than 120 cm/h, to avoid damage to the adapter scraper seal.
5
When the adapter has reached the desired height, turn off the pump.
Moving the adapter upwards in the column
1
Ensure that the top mobile phase inlet/outlet and the hydraulic vent valve are closed.
2
Attach one end of a tubing to the hydraulic chamber outlet and the other end of the
tubing to waste.
46
AxiChrom 50, 70 and 100 columns Operating instructions 28-9331-08 AG
4 Getting started
4.6 Routine procedures