Metrohm 838 Advanced Sample Processor Installation Instructions - Manual (Page 67)

4.1 Servicing
Metrohm 838 Advanced Sample Processor, Service, maintenance, faults 61
4 Service, maintenance, faults
4.1 Servicing
Servicing the Advanced Sample Processor should be carried out within
the framework of an annual service visit by technicians from Metrohm or
one of its local agencies. If aggressive or corrosive chemicals are used
then shorter service intervals are necessary.
The Metrohm service department is always pleased to provide compe-
tent advice about the servicing and maintenance of all Metrohm instru-
ments.
4.2 Care and maintenance
Not just sensitive instruments, but even a Sample Processor requires a
certain amount of care and attention. If the instrument becomes exces-
sively dirty this could interfere with its functions and shorten the working
life of its basically robust mechanism and electronics.
Excessive dirt on the working heads can influence the measuring re-
sults obtained. Regular cleaning of exposed parts can prevent this to a
large extent.
Spilled chemicals and solvents should be cleaned up immediately.
Above all, the connection strip (the mains plug in particular) must be
protected against contamination.
Although this prevented to a large extent by constructive measures, if
aggressive media should penetrate the interior of the instrument then
the mains plug should be pulled out immediately in order to prevent
massive damage to the electronics. If such damage should occur
please contact the Metrohm service department.
The instrument must not be opened by untrained personnel.
4.2.1 Exchanging pump tubings
Pump tubings are consumable material with a restricted service life.
You should thus periodically replace pump tubings (approx. every 2
weeks if used continuously).
The service life of pump tubings depends greatly on the contact pres-
sure. You should thus set the contact pressure correctly in accordance
with Chapter 3.3.9 and fully raise the tubing cartridges by releasing the
snap-action lever 51 if the pump is to be switched off for a long period
(this maintains the optimum contact pressure once set).