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5 Operation and maintenance
940 Professional IC Vario TWO (2.940.2100)
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5.2
Capillary connections
All capillary connections between the injection valve, the separation col-
umn and the detector must be as short as possible, have a low dead vol-
ume and be completely leak-tight.
The PEEK capillary downstream of the detector must be free of blockages.
Use only PEEK capillaries with an inner diameter of 0.25 mm between the
high-pressure pump and the detector (high-pressure section).
5.3
Servicing the door
CAUTION
The door is made of PMMA (poly(methyl methacrylate)). It must never
be cleaned with abrasive media or solvents.
CAUTION
Never hold the instrument by the door when lifting it. Only hold the
instrument by the housing.
5.4
Column thermostat – Replacing the capillaries
There are two preheating grooves on both of the column thermostat's
side walls, where the column inlet capillary has already been inserted and
fastened in place with a holder plate.
