Servicing The Peristaltic Pump - Metrohm 942 Extension Module Vario LQH Manual

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5.2.2

Servicing the peristaltic pump

5.2.2.1 Replacing the pump tubing
Maintenance interval
5.2.2.2 Replacing the filter
Maintenance interval
Accessories
942 Extension Module Vario LQH (2.942.0070)
Pieces of pump tubing inserted into the peristaltic pump are consumables
with a limited service life.
Pieces of pump tubing with 3 stoppers are tensioned in the tubing car-
tridge so that they end up positioned between two stoppers. This results
in two possible positions for the tubing cartridge. Once the pump tubing
exhibits significant signs of wear, it can be tensioned a second time in the
other respective position.
Replace the pump tubing every 2 months.
Replace the pump tubing every 4 weeks if the peristaltic pump is being
used continuously.
The filters inserted into the pump tubing connection with locking nut and
filter (6.2744.180) must be replaced regularly.
We recommend replacing the filters (6.2821.130) (11-2) every three
months. The filters may need to be replaced more frequently, depending
on the application.
For this step, you need the following accessories:
1 filter from the spare filter set (6.2821.130)
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2 adjustable wrenches (6.2621.000)
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Tweezers
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5 Operation and maintenance
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