Roche Diagnostics May 2009
C-10 Service Manual · Version 9.0
6 Maintenance cobas b 221 system
cobas b 221<1/3/5> systems (tHb/SO
2
)
cobas b 221<1/3/5> systems (tHb/SO
2
)
Yearly replacement
Sample needle
e
For instructions, see Replacing the needle on page B-23.
Fill port
e
For instructions, see Replacing the fill port on page B-23.
T&D tubing set
e
For instructions, see Replacing the T&D tubing set on page B-27.
PP pump tube
e
For instructions, see Replacing the pump tube on page B-67.
FMS tubing set
e
For instructions, see Replacing the FMS tubing set on page B-35.
Waste separator
e
For instructions, see Replacing the waste separator on page B-68.
Bypass nipple
e
For instructions, see Replacing the bypass nipple on page B-24.
Bacteria filter
e
For instructions, see Replacing the bacteria filter on page B-72.
Air filter (On the rear panel of the instrument.)
T&D disk
e
For instructions, see Replacing the T&D disk on page B-26.
Check vacuum system
e
For instructions, see Vacuum System on page D-101.
Tubing set tHb/PolyOX
e
For instructions, see Replacing the tubing set tHb/PolyOX on page B-59.
Various components of the cobas b 221 system such as T&D module, tubes, waste container, etc.,
contain liquid biological residues after use that may cause infection.
Handle these components with care and avoid skin contact. To avoid direct contact with biological
materials, always wear appropriate protective equipment such as lab clothing, protective gloves,
safety glasses and, if necessary, a face mask. Additionally a face shield must be worn if there is a
potential of a splashback. Appropriate disinfection and sterilization procedures must be followed.
The tubes may drip a little after being disconnected. Remove excess fluids with a clean, absorbent
cloth.
The tubing paths must also be disinfected annually and the baro value must be checked.
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