Metrohm 820 IC Separation Center - Manual (Page 77)

4.2 Maintenance and servicing
819 IC Detector / 820 IC Separation Center
69
Eluent change
When the eluent is changed, it must be ensured that no precipitates
can be formed. Solutions used in direct succession must therefore be
miscible. If the system has to be rinsed with an organic solution, several
solvents with increasing or decreasing lipophilic character may possibly
have to be used (e.g. water ↔ acetone ↔ chloroform).
4.1.4 Suppressor module
To avoid contamination of the suppressor module by foreign particles
or bacterial growth, it is advantageous to install an in-line filter be-
tween the 833 IC Liquid Handling Pump Unit and the suppressor mod-
ule. The two 6.2821.120 Filter units PEEK (see Section 2.7.3 und
Section 2.9.4) supplied with the 2.833.0010 IC Liquid Handling Pump
Unit are eminently suitable for this purpose.
4.1.5 Connections
All connections between injector, column and detector must be as short
as possible, have a low dead volume and be absolutely tight. The PEEK
capillary after the detector block must be free from constriction (the
measuring cell is tested to 5 MPa = 50 bar back pressure).
4.2 Maintenance and servicing
4.2.1 General information
Care
The 819 IC Detector and 820 IC Separation Center require proper care
and attention. Excessive contamination of the instruments could possi-
bly lead to malfunctions and a shorter service life of the inherently rug-
ged mechanical and electronic parts.
Spilled chemicals and solvents should be wiped up immediately. It is
especially important to protect the plug connections at the rear of the
instrument (particular the mains plug) against contamination.
Although constructional measures have been designed to virtually
eliminate such a situation, should corrosive media penetrate the inte-
rior of the instruments the mains plug of the 819 IC Detector must be
immediately disconnected to prevent extensive damage to the instru-
ment electronics. Inform Metrohm service if your instrument(s) have
been damaged in such a way.
The instrument must not be opened by untrained personnel. Please
comply with the safety notes in Section 1.4.1.