Roche Diagnostics May 2009
Service Manual · Version 9.0 A-25
cobas b 221 system 2 Fluid actions
Measurement
Aspirating MSS standby solution and starting FMS
The MSS is positioned in four subsections:
Preconditioning by aspiration of
standby solution (1)
This process is done before aspiration of the sample. A little reference solution is
aspirated via V8 and the MSS reference electrode and is checked with the conductivity
section at the MSS output.
e
For more information, see Aspirating MSS reference solution, calibration with standby
solution on page A-39.
Then the measuring chamber is filled with standby solution.
A MSS output pump
B MSS input pump
C Aspirating MSS standby solution
D CAL B
E CAL A
F Starting FMS
G MSS standby solution
Figure A-13 Aspirating MSS standby solution and starting FMS
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