BrandTech Scientific seripettor - Manual (Page 43)

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English
The dispensing cartridge is a wearing part. Replace the cartridge when the piston is difficult to move
or is not airtight.
To prevent chemical injury, the dispensing cartridge has to be cleaned prior to replacement (page 40).
Replacing the dispensing cartridge
1.
Screw the instrument onto an empty bottle, and empty it com-
pletely with several dispensings.
2.
Manually press the pump assembly all the way down and hold it
there. Loosen the volume selector thumb screw one-half turn,
slide the pointer vertically to the upper stop and then retighten
the volume selector thumb screw (fig. 2).
3.
Loosen the piston lock (fig. 3).
4.
Unscrew and remove the pump assembly (fig. 4).
5.
Unscrew the dispensing cartridge (fig. 5) and replace it with a
new one (Accessories, page 45).
6.
Screw the pump assembly on and secure the piston lock.
Maintenance
43