Roche Diagnostics May 2009
Service Manual · Version 9.0 C-11
cobas b 221 system 6 Maintenance
cobas b 221<1/3/5> systems (tHb/SO
2
)
Replace every three years
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.
Tubing set tHb/PolyOX
e
For instructions, see Replacing the tubing set tHb/PolyOX on page B-59.
Sample distributor cartridge
e
For instructions, see Replacing the sample distributor cartridge on page B-35.
Measuring chamber cartridge
e
For instructions, see Replacing the measuring chamber cartridge on page B-48.
Hb cartridge
e
For instructions, see Replacing the Hb cartridge on page B-63.
Waste tubing
e
For instructions, see Replacing the waste tube on page B-77.
Check vacuum system
e
For instructions, see Vacuum System on page D-101.
VP tubing set
e
For instructions, see Replacing the VP tube set on page B-78.
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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