Metrohm 850 Professional IC Anion MSM-HC - LP-Gradient - Manual (Page 78)

5.2 Capillary connections
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850 Professional IC Anion MSM-HC LP Gradient
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 coupling (6.2744.040). Rinsing is carried out with metha-
nol/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 , separation column and detector
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 backpressure). Only use
PEEK capillaries with an internal diameter of 0.25 mm in the high pressure
range between the high pressure pump and the detector..
5.3 Door
Caution
The door is made of PMMA (polymethylmetacrylate). It must never be
cleaned with abrasive media or solvents.
Caution
Never use the door as a handle.