Metrohm Autosampler plus 919 IC Manual page 25

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919 IC Autosampler plus
Pump tubing
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 (7-5), 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.
NOTICE
Pump tubings are consumables. The service life of the pump tubings
depends on the contact pressure, among other factors.
3 Installation
Adapter
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17