Metrohm 882 Compact IC plus – Anion - Manual (Page 40)

3.9 High pressure pump ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
30 ￭￭￭￭￭￭￭￭ 882 Compact IC plus – Anion
1 Pressure screw
For connecting the coupling (14-
2 ) to the
pump head inlet capillary (13- 7 ).
Can be ordered together with the coupling
under the number (6.2744.230).
2 Coupling (6.2744.230)
For connecting the eluent connection capil-
lary (14-
4 ) to the input of the high pressure
pump.
3 Clamping screw 4 Eluent aspiration tubing
Eluent aspiration tubing (6.1834.080) or
(6.1834.090).
5 Backup ring
1 Connecting coupling
Fasten the coupling (14-2) with a pressure screw (14-1) on the pump
head inlet capillary (13-7).
2 Connecting eluent aspiration tubing
Caution
The clamping screws must be tightened carefully. To tighten, grip
the coupling (14-2) with the key (6.2739.000) and grip the clamp-
ing screw (14-3) with the wrench (6.2621.050).
￭ Plug the eluent aspiration tubing (14-4) into the coupling (14-2).
￭ Tighten the clamping screw (14-3).
3.9.2 Deaerating the high pressure pump
The high pressure pump will only operate perfectly if the pump head con-
tains no more air bubbles. Therefore it must be deaerated during initial
start-up and after every change of eluent.
Caution
The high pressure pump must not be deaerated before the initial start-
up (see Chapter 4.1, page 50).
Deaerate the high pressure pump as follows (see Figure 15, page 31):
Deaerate the high pressure pump
The instrument must be connected to the PC and switched on to deaerate
the high pressure pump.