RADIOMETER FLEX ABL90, Справочное руководство

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ABL90 FLEX reference manual 5. Sensors and optical system
5-11
the pCO
2
sensor is also checked. If the check fails, the check is repeated. If the
second check fails, the User intervention required mode is entered.
During liquid sensor checks, the inlet, sensor and oxi liquid sensors check the
liquid transport in the wet section. The calibration of the liquid sensors is also
checked. In case a calibration fails, a rinse is performed and the system
calibration repeated. If the second calibration fails the User intervention
required mode is entered. If the solution is inhomogeneous, the refill program
will perform three retries before aborting. If a rinse, as part of another program,
fails, a new rinse is tried and the User intervention required mode is entered if
the second attempt fails. During aspiration of a sample or internal solution, the
liquid sensors check the liquid transport (both the air segments and the liquid
are expected to trig off the sensors within certain time limits). In case of errors
the activity will be aborted.
Measurement preparation checks:
A rinse is performed after each activity. With the rinse, the temperature and
homogeneity of the rinse solution is checked. In case of rinse error, a rinse will
be performed. If this rinse fails too, the User intervention required mode is
entered.
Sample integrity checks:
The pO
2
check is used to check for any blockage or leak in the flow path, and,
furthermore, the pO
2
sensor is checked for air in front of the pO
2
sensor. In case
of any air the pO
2
parameter will be marked with a ? and a corresponding error
message is given. During pO
2
checks, pressure tests are performed. In case the
tests fail, the activity is retried. If this activity fails, the User intervention
required mode is entered.
Consumables checks:
During consumables check, the sensor cassette and the solution pack lifetime
and expiration date are checked by inspecting the smart chip data of the
individual consumables. In case of chip data errors or if the consumables are
used up or have expired, the User intervention required mode is entered. The
user has the possibility to perform a replacement.
Apart from the checks mentioned above a flow selector check, pressure test,
refill, pump calibration and a rinse are also performed during a solution pack
replacement. Furthermore, it is checked whether the Solution pack has been
used before. In case of errors, the User intervention required mode is entered.
The user has the possibility to perform a replacement.
During a sensor cassette replacement it is also checked whether the sensor
cassette has been used before and if the minimum/maximum conditioning time
has been met. Thereafter, a pressure test, liquid sensor check, pump
calibration, rinse and a calibration of all the sensors are performed. In case of
any errors the sensor cassette is considered to be unconditioned, and the
analyzer will perform an automatic conditioning and a new calibration that
prolong the startup time to 30 minutes.
By default each of the three built-in QC will be run after replacements and
startup. If this function has been deactivated it is recommended to perform QCs
after replacements and startup.
If the solution pack and the sensor cassette have been replaced at the same
time, all the above checks will be carried out. In case of errors the User
intervention required mode is entered. The user has the possibility to perform a
replacement.
Furthermore some system checks are also performed after the replacement of
the solution pack and sensor cassette.