Roche Diagnostics May 2009
A-32 Service Manual · Version 9.0
2 Fluid actions cobas b 221 system
Calibration
Calibrating the conductivity for CAL A or CAL B
FMS adjustment: This procedure starts by aspirating the FMS through V19 (air) until it is empty. After
a short pressure equalization V19 is closed and CAL B is aspirated into the BG
measuring chamber (
e
Figure A-18).
CAL B must be detected in the BG measuring chamber by the conductivity measuring
distance within a set period (after 9.64 sec at the earliest and after 12.34 sec at the
latest).
A Main pump
B CAL B
C CAL A
D FMS
Figure A-18 Calibrating the conductivity for CAL A or CAL B
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