Metrohm 844 UV/VIS Compact IC - Manual (Page 92)

Table of contents
4.2 Maintenance and servicing
4.2.1 General information
Care
The 844 UV/VIS Compact IC requires proper care and attention.
Excessive contamination of the instrument could possibly lead to mal-
functions and a shorter service life of the inherently rugged 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
interior of the instruments the mains plug of the 844 UV/VIS Compact
IC must be immediately disconnected to prevent extensive damage to
the instrument 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.
Maintenance by Metrohm service
Maintenance of the 844 UV/VIS Compact IC is best done as part of an
annual service performed by specialists from the Metrohm company. If
work is frequently performed with caustic and corrosive chemicals, it
may be necessary to shorten the interval between servicing.
The Metrohm service department is always willing to offer expert advice
on the maintenance and servicing of all Metrohm instruments.
4.2.2 Shutdown
If the 844 UV/VIS Compact IC is shut down for a considerable length of
time, the entire IC system (without column) must be rinsed free from
salt with methanol/water (1:4) to avoid crystallization of eluent salts with
the corresponding subsequent damage.
The connections to the column must be removed for rinsing; the two
inlet and outlet capillaries are connected directly with a coupling.
Before taking it back into operation, rinse the system with eluent
(before the connection of the separation column).
4.2.3 Changing separating columns
It is recommended that the precolumn is also changed each time you
change the separation column). In principle the precolumn requires
changing more frequently then the separating column.
Identical separation system