128
7.2.2 Exchange of hydrophobic air filters
Hydrophobic air filters (0.2 μm) are attached to the bottle closures to vent the liquid
bottles and to prevent release of aerosols. They should be exchanged once a year to
avoid clogging through dust deposits. To avoid clogging of the filters and to
prevent contamination of liquids, air filters should be exchanged if they come into
direct contact with any liquid. Note: Be sure to use hydrophobic air filters. These
are not the same as filters used for cell culture.
7.2.3 Clean the pump syringe
Depending on the level of usage, the pump syringe must be cleaned every 1–3
months. Appropriate maintenance and long-term storage assures that no salt
deposits accumulate in the pump syringe. Salt deposits may cause wear of the
pump seal and thus may lead to leakage. The pump syringe should not run dry at
any time. This can damage the pump seal and thereby may lead to leakage.
Figure 7.2: Dilutor valve with pump syringe.
1 Go to Option > User settings > Syrin_ex.
2 Press Run to start the program.
A B
C
D
E
F
Dilutor
valve
Plunger
lock
screw
Top
screw
Plunger
Plunger
holder
