Metrohm 872 Extension Module Suppression - Manual (Page 27)

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872 Extension Module Suppression ￭￭￭￭￭￭￭￭ 19
Set flow rate
The contact pressure of the tubing cartridge must be adjusted in order to
regulate the flow rate. Proceed as follows:
Set the contact pressure
1 ￭ Fully loosen the contact pressure lever (5-5), i.e. press it all the
way down.
￭ Switch on the peristaltic pump.
￭ Raise the contact pressure lever one step at a time until liquid
flows.
￭ When liquid starts flowing, raise the contact pressure lever by an
additional 2 ratchet increments.
The contact pressure is now set optimally.
The delivery rate depends not only on the correct contact pressure
but also on the interior diameter of the pump tubing and the rota-
tional speed of the drive.
Note
Pump tubings are consumable material. The service life of the pump
tubings depends on the contact pressure amongst other factors.
3.5 Suppressor drive
The suppressor housing of the 872 Extension Module Suppression can
hold various rotors. Large rotors like the SPM rotors A (6.2835.000) and
the MSM-HC rotor A (6.2842.000) can be inserted directly.
Small rotors like the MSM rotor A (6.2832.000) and the MSM-LC rotor A
(6.2844.000) must first be fitted into the adapter (6.2842.010) which can
then be inserted into the suppressor housing.
For all rotors the large connecting piece (6.2835.010) is used.