Metrohm 793 IC Sample Preparation Module - Manual (Page 34)

4 Malfunctions - Maintenance
793 IC Sample Prep Module/ 8.793.1003 Instructions for Use
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4.2 Maintenance and servicing
4.2.1 Care
The 793 IC Sample Prep Module 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 793 IC Sample Prep
Module must be immediately disconnected to prevent extensive
damage to the instrument electronics. Inform Metrohm service if your
instrument has 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.
4.2.2 Maintenance by Metrohm service
Maintenance of the 793 IC Sample Prep Module is best done as part of
an annual service performed by specialists from the Metrohm company.
Due to caustic and corrosive chemicals which are processed by this
device, 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.
4.2.3 Shutdown
If the IC system is shut down for a considerable length of time, the en-
tire IC system (without column, suppressor and SP Module A) must be
rinsed free from salt with methanol/water (1:4) to avoid crystallization
of eluent salts with the corresponding subsequent damage. In order to
rinse them the separating column, suppressor and actuator are discon-
nected and the injector and detector are directly connected to each
other. Rinse with methanol/water (1:4) until the conductivity drops below
10 PS/cm.
All three suppressor and actuator units are then rinsed for about 5 min
with ultrapure water.