Metrohm 872 Extension Module Sample Prep - Manual (Page 29)

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872 Extension Modul – Sample Prep ￭￭￭￭￭￭￭￭ 21
5 Handling and maintenance
5.1 Door
Caution
The door is made of PMMA (polymethylmetacrylate). It must never be
cleaned with abrasive media or solvents.
Caution
Never use the door as a handle.
5.2 Peristaltic pump
5.2.1 Operation
The pumping capacity of the peristaltic pump depends on the drive speed
(set via software), the contact pressure and, above all, the internal diame-
ter of the pump tubing. Depending on the application, different pump
tubes are used.
Caution
The service life of the pump tubing also depends on the contact pres-
sure. Therefore fully lift the tubing cartridges by loosening the snap-
action lever (8-10) on the right-hand side if the peristaltic pump is to be
turned off for a longer period. Once set, the contact pressure remains
unaffected.
Caution
The pump tubing 6.1826.xxx consists of PVC or PP and therefore must
not be used for rinsing with solutions containing acetone. In this case,
use other pump tubing or use another pump for rinsing.