Metrohm 919 IC Autosampler plus - Manual (Page 24)

3.4 Installing the peristaltic pump
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919 IC Autosampler plus
6 Connect the capillaries
￭ Screw the respective capillaries tightly to the two tubing olives
with PEEK pressure screws (8-1).
Table 1 Pump tubings and suitable adapters
Pump tubing Adapter
6.1826.020 (blue/blue)
6.1826.310 (orange/green)
6.1826.320 (orange/yellow)
6.1826.330 (orange/white)
6.1826.340 (black/black)
6.1826.360 (white/white)
6.1826.380 (gray/gray)
6.1826.390 (yellow/yellow)
Setting the flow rate
The contact pressure of the tubing cartridge must be adjusted in order to
regulate the flow rate. Proceed as follows:
1 Set the contact pressure
￭ Fully loosen the contact pressure lever (8-5), i.e. press it all the
way down.
￭ Switch on the drive of 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 flow rate depends not only on the correct contact pressure but
also on the inner diameter of the pump tubing and the rotational
speed of the drive.