Metrohm 754 Dialysis Unit - Manual (Page 33)

4 Malfunctions – Maintenance
754 Dialysis Unit
30
4.2 Maintenance and servicing
4.2.1 Handling dialysis membranes
Dialysis membranes are very sensitive to contact and drying out. Avoid
touching them by hand and ensure that the membrane in the cell never
dries out.
The service life of a dialysis membrane is approx. 1 week under fre-
quent use. Do not hesitate to replace the membrane if signs of de-
creased yield or blockages become apparent.
Please ensure you follow the instructions on how to install the dialysis
cell (section 2.3.4), how to shut it down (section 4.2.4) and how to re-
place the dialysis membrane (section 4.2.6).
4.2.2 Care of the unit
The 754 Dialysis Unit requires proper care and attention. Excessive
contamination of the instrument could possibly lead to malfunctions
and a shorter service life of the inherently rugged mechanical and elec-
tronic parts.
Wipe up spilled chemicals and solvents immediately. It is especially
important to protect the plug connections at the rear of the instrument
(particularly the mains plug) against contamination.
The unit has been constructed in such a way as to virtually eliminate
the possibility of penetration of corrosive media into the interior of the
instruments. If such a situation does occur, disconnect the mains
plug of the 754 Dialysis Unit immediately to prevent extensive damage
to the instrument electronics. Inform Metrohm service if your instru-
ment has been damaged in such a way.
The instrument must not be opened by untrained personnel. Please
comply with the safety notes in section 1.5.1.
4.2.3 Maintenance by Metrohm service
Maintenance of the 754 Dialysis Unit 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.