Metrohm 942 Extension Module Vario LQH Manual page 29

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942 Extension Module Vario LQH (2.942.0070)
3 Inserting the pump tubing
Press the tubing cartridge's contact pressure lever down all the
￭
way.
Place the pump tubing in the tubing cartridge. Fit the tubing car-
￭
tridge between two stoppers. The stoppers must snap into the
corresponding holder of the tubing cartridge.
4 Inserting the tubing cartridge
Hang the tubing cartridge in the mounting bolt and press it in the
￭
cartridge holder until you hear the snap-action lever snap in.
Setting the flow rate
The flow rate of the peristaltic pump depends on many factors:
The inner diameter of the pump tubing
￭
The rotational speed of the drive
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The contact pressure of the tubing cartridge
￭
NOTICE
Pieces of pump tubing are consumables. The service life of the pump
tubing depends on the contact pressure, among other factors.
Setting the contact pressure correctly
1 Fully loosen the contact pressure lever , i.e. press it all the way
￭
down.
In the software, activate the drive of the peristaltic pump with the
￭
desired speed.
Raise the contact pressure lever one step at a time until liquid
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flows.
3 Installation
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