Metrohm 881 Compact IC pro – Anion - Manual (Page 54)

3.15 Peristaltic pump
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881 Compact IC pro – Anion
￭ Carefully bend the column input capillary (22-1) downward and
slide it from top to bottom through the inner capillary recess
(22-3) until it emerges at the lower edge of the holder plate
(22-4).
￭ At the end of the column input capillary (22-1), connect the cou-
pling 6.2744.040 (first-time installation) or the guard column or
the separation column (after first-time start-up) (see "Connecting
and rinsing the guard column", page 55) or (see "Connecting
and rinsing the separation column", page 57).
Note
If it is difficult to slide the capillary under the holding plate, then
you can loosen the holding plate somewhat by undoing the
screws slightly. Carefully retighten the loosened screws as soon as
the capillary has been pulled into the recesses.
3 Closing the column chamber
Press the door to the column heater shut and close it tightly with the
knurled screws.
Note
When closing the door, take care to ensure that the capillaries are
in place in the capillary feed-throughs in the door and that they
are not squeezed shut.
3.15 Peristaltic pump
3.15.1 Principle of the peristaltic pump
The Peristaltic pump is used for pumping sample and auxiliary solutions. It
can rotate in both directions.
The peristaltic pump pumps liquids according to the principle of displace-
ment. The pump tubing is clamped between the rollers (23-3) and the
tubing cartridge (23-5). During operation, the peristaltic pump drive
rotates the roller hub (23-2), so that the rollers (23-3) push the liquid for-
ward in the pump tubing.