Roche cobas b 221 system User Manual

Roche Diagnostics May 2009
Service Manual · Version 9.0 A-29
cobas b 221 system 2 Fluid actions
Measurement
Recalibrating BG/ISE and drying tHb/SO
2
or COOX
To recalibrate BG and ISE the main pump first aspirates a mixture of air (from a
reservoir between sample distributor and measuring chamber cartridge) and Mix1
through the measuring chambers. When this has sufficiently washed them, the
measuring chambers are filled with Mix1 by shutting off the air feed.
This filling is assessed by conductivity measurement: with liquid solution a stable and
plausible value must be measured between MCI and MCO.
Then the inlet valve is closed and reference solution is aspirated through valves V5 or
V9 until a clear increase in conductivity between MCI and MCO can be detected.
e For more information, see Mix1/Mix2 calibration, aspirating BG/ISE reference solution on
page A-36.
A Vacuum pump
B Main pump
C Recalibrating BG/ISE
D Waste separator
E V4
F Drying tHb/SO
2
or COOX
G FMS
Figure A-16 Recalibrating BG/ISE and drying tHb/SO
2
or COOX
A B C
GFED

Roche cobas b 221 system Specifications

General

Brand	Roche
Model	cobas b 221 system
Category	Medical Equipment
Language	English