Metrohm 861 Advanced Compact IC User Manual

Page 57

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2.10 Putting into operation

861 Advanced Compact IC / Instructions for Use 8.861.1033

47

Section 3.3.1), the 853 will start up. At the same time a chro-

matogram window opens in which the baseline is shown con-

tinuously.

4 Set contact pressure for pump tubings

Press contact pressure lever 48 on both tubing cartridges 47

upwards until regeneration and rinsing solution just start to be

drawn in.

Then press contact pressure lever 48 upward by 1 more click

in order to achieve an optimal contact pressure.

5 Check for leaks

Check all capillaries and their connections between the high-

pressure pump and the detector block and between the peri-

staltic pump and the suppressor module «MSM II» for escap-

ing liquid. If eluent escapes anywhere then the appropriate

compression fitting must be tightened further or changed.

6 Condition system

Rinse the system with eluent until the desired stability of the

baseline is reached (normally 30

60 min; if the eluent is

changed, the establishment of the ion exchanger equilibrium

on the separating column can take longer). During that time,

step the suppressor at least 3 times (approx. every 10...20

minutes), so that after this time the suppressor module is suf-

ficiently conditioned too.

The instrument is now ready for sample determinations using

the selected system.

Pump tubings are consumable material with a lifetime which depends

on the contact pressure. This is why the tubing cartridges should be

raised completely by loosening snap-action lever on the right-hand si-

de if the pump is to remain switched off for a considerable length of

time (the set contact pressure remains unchanged).

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