Metrohm 861 Advanced Compact IC - Manual (Page 80)

4 Notes - Maintenance - Faults
861 Advanced Compact IC / Instructions for Use 8.861.1033
70
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 861 Advanced Compact
IC must be immediately disconnected to prevent extensive damage to
the instrument electronics. Inform Metrohm service if your instru-
ment(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 861 Advanced Compact IC is best done as part of
an annual service performed by specialists from the Metrohm compa-
ny. 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 Passivation
Passivation of the complete IC System (without column) by rinsing with
20...50 mL 0.2 mol/L HNO
3
is only required when unusual alterations to
the measuring properties of the cell are observed. For passivation the
separating column 73 is removed from the 861 Advanced Compact IC.
The two in- and outlet capillaries are directly connected to each other
using the Coupling (6.2620.060).
4.2.3 Recycling
To keep the eluent consumption between injections to a minimum when
the system is at rest (e.g. overnight), the so-called recycling procedure
can be used. In recycling the eluent exiting the outlet capillary of the de-
tector block is led back directly to the eluent supply vessel 67. The IC
system is thus quickly ready for new injections without a long condition-
ing period.
Instead of threaded stopper 65 the 4.420.0311 Tubing nipple (M6),
which belongs to the accessories of the 6.1602.160 Bottle attachment,
can be used together with the second E.301.0021 O-ring (which is also
included) for returning the eluent (see Section 2.6.3).
The recycling procedure must not be used
• in operation with the suppressor module «MSM II»
• with alkaline eluents
• with the 6.1010.000 IC Cation column METROSEP Cation 1-2.
4.2.4 Shutdown
If the 861 Advanced Compact IC is shut down for a considerable length
of time, the entire IC system (without column and suppressor) must be