Metrohm 850 Professional IC AnCat MSM-HC MCS - Manual (Page 85)

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5 Operation and maintenance
850 Professional IC – AnCat – MSM-HC – MCS
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5.1.3 Operation
Caution
In order to avoid disturbing temperature influences, the entire system
including the eluent bottle must be protected against direct sunlight.
5.1.4 Shutting down
If the instrument is shut down for a longer period, the entire IC system
(without separation column) must be rinsed salt-free with methanol/ultra
pure water (1:4), in order to prevent eluent salts from forming crystals
which may cause subsequent damage.
Guard column and separation column are excluded from the eluent path
for rinsing. The connection capillaries are directly connected to one
another with a 6.2744.040 coupling. Rinsing is carried out with methanol/
ultra pure water (1:4) until the conductivity drops below 10 µS/cm.
Rinse with eluent for at least 15 minutes at starting up again and before
connecting the guard column and separation column.
5.2 Capillary connections
5.2.1 Operation
All connections between injection valve (see Chapter 3.14, page 46), sep-
aration column (see Chapter 3.22, page 69) and detector (see Chapter
3.19, page 63) must be as short as possible, have a low dead volume and
be completely leak-tight. The PEEK capillary after the detector must be
free of blockages (the measuring cell is tested to 5 MPa = 50 bar back-
pressure). Only use PEEK capillaries with an internal diameter of 0.25 mm
in the high pressure range between the high pressure pump (see Chapter
3.10, page 37) and the detector.