Roche cobas b 221 system

Roche Diagnostics May 2009
Service Manual · Version 9.0 B-59
cobas b 221 system 4 Components
COOX module (cobas b 221<2/4/6> systems only)
Replacing the cuvette
1 Remove the cobas b 221 system top cover and open the cuvette holder.
2 Open the retainer and remove the cuvette.
Use the reverse order for assembly.
After replacing the cuvette, perform a COOX calibration using tHb calibrator or a
blood sample whose tHb value is exactly known:
e For instructions, see cobas b 221 system Instructions for Use, section "COOX calibration".
3 Perform a COOX calibration and enter "Yes" at "Cuvette replaced".
4 Confirm the message "COOX calibration performed" by pressing "Ok".
5 Perform another COOX calibration and enter "No" at "Cuvette replaced".
The COOX module will be ready for measurement after accepting the second
calibration.
Replacing the cuvette seals
1 Remove the cobas b 221 system top cover and open the cuvette holder.
2 Open the retainer and remove the cuvette.
3 Remove the two cuvette seals with tweezers.
Use the reverse order for assembly.
Replacing the tubing set tHb/PolyOX
A Two seals
Figure B-42 Cuvette seals
A A
Activate the function program h [System] > [Utilities] > [Maintenance] >
[Change Hb cartridge] to position all valve actuators correctly.