Roche Diagnostics May 2009
Service Manual · Version 9.0 E-5
cobas b 221 system Glossary
MSS polarisation -Touch screen/PC unit
MSS polarisation A blood sample is inserted via fill
port similar to a measurement. The MSS cassette is
subsequently exposed to liquid and polarized.
Multirules The evaluation of QC results is based on the
Westgard rules and their interpretation for blood gas
analysis. The Multirule process was derived from these
rules. It permits early detection of random and
systematic errors associated with the measuring device
and its operation.
NIST standards Are precise serums with accredited
target values.
Patient trending map By means of this map, the
course of individual parameters (measurement and
calculation values) of a patient over any required period
(standard setting = one day) can be shown and printed
out.
Peristaltic pump see Pumps
Plasma Plasma samples are obtained by centrifuging
heparinized whole blood, during which the cellular
components of the blood are removed from plasma.
Plug control Infrared light barrier to detect attached/
removed sample container.
Polychromator The light is broken up and shown on
the surface of a photosensitive receive (CCD – charge
coupled device).
PP abbr. for peristaltic pump
Printer Low-noise thermoprinter with integrated paper
cutter (manually activated using the "Cut" key) and
optional winder.
Pumps Depending on the configuration, up to three
peristaltic pumps transport the sample and the operating
fluids inside the instrument (main pump, MSS output
pump, MSS input pump).
QC abbr. for quality control
QC material see AUTO-TROL PLUS B, AUTO-TROL
TS+, COMBITROL PLUS B, COMBITROL TS+
Quality control A quality control program includes the
analysis of sample materials with known ranges of
expected values and the comparison of these values with
analyzer results.
"Ready" screen Top level of the analyzer mode.
RCon abbr. for reference contact
RCon is used for Glu/Lac or Glu instrument variants and
replaces the reference electrode and dummy.
Reference electrode The reference electrode must
always produce the same signal, regardless of the sample's
composition. This is achieved by mixing the sample flow
with a liquid of a higher KCl concentration (reference
solution).
Rubber sealing sealing of S2 Fluid Pack and
depending on configuration S3 Fluid Pack A.
Sample distributor Is used for optimum temperature
control and distribution of the samples and calibration
solutions to the measurement modules. The sample
distributor primarily consists of the sample distributor
cartridge, the SD bypass nipple, the sample heating, the
sample sensors and the drives of the distributor valves.
Sample inlet path Glass tube. Is used to transport
fluids from the T&D disc through the needle to the
sample distribution block (sample distributor).
Sample throughput Number of samples per hour.
Sample drip tray Prevents contamination of the bottle
compartment (in case of improper sample introduction).
SCon abbr. for sensor contact
This electrode supports monitoring when filling the
measuring chambers with fluid, without allowing the
reference solution to return to the active electrodes.
Touch screen/PC unit The touch screen/PC unit
serves as the graphical user interface. All information
(results, error messages, alarms, warnings, etc.) is
displayed on the screen. The screen consists of a color
N
P
Q
R
S
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