Eppendorf Varispenser 4962 - Manual (Page 39)

33
11.2. Standard cleaning procedure
1. Mount the dispenser on a bottle
filled with a suitable cleaning
solution.
2. Rinse the dispenser by repeated
dispensing movements at maximum
volume. For dispensers with a
recirculation valve, set the valve
toggle to “recirculation” and again
move the piston repeatedly to empty
the recirculation channel.
3. Empty the dispenser completely, as
described in chapter 11.1.
4. Mount the dispenser on a bottle
filled with distilled water, rinse and
empty thoroughly, as described
above.
11.3. Intensive cleaning procedure
Intensive cleaning always has to be preceded by a standard cleaning. This
procedure must be followed if the piston is difficult to move, or if the dispenser is to
be autoclaved. For this purpose, the dispenser must be partially disassembled.
Warning: Before disassemble, always perform the standard cleaning procedure.
To prevent injury from chemicals, always wear eye protection, protective clothing and
protective gloves. Avoid splashing of reagent.
1. Pull off the telescopic filling tube and clean it with a soft bottle brush. Replace as
necessary, especially if cracked or worn.
2. Unscrew the piston seat (2) and carefully pull out the piston (5).
3. Clean piston and cylinder with a soft bottle brush
and rinse with water.
4. Re-insert the piston carefully so as not to damage
the piston seal.
5. Tighten the piston seat by hand.
6. Rinse the dispenser thoroughly with distilled water, then empty as described
above. See chapter 7 for instruction about cleaning the valves.