Roche Diagnostics
Instructions for Use · Version 13.0 223
cobas b 123 POC system 8 Calibration
General information
General information
Calibration compares the results of a known standard from your instrument with the
results for the same standard with other instruments. It ensures that there is
consistency between your measurements with the system, and determines that all of
your measurements are accurate and reliable.
Calibrations on the cobas b 123 POC system are performed with 3 stable aqueous
solutions found inside the Fluid Pack.
Calibrations are performed automatically at specific times. In addition, you can
perform manual calibrations at any time.
Calibration schemes
After inserting a new Sensor Cartridge, measurements from some parameters may
drift. Usually, this occurs in the RUN-IN phase. The system automatically monitors
drift in parameter values. If there is considerable sensor drift, the system
automatically switches to a different calibration scheme that performs 2P and PO
2
calibrations more regularly.
To view which calibration scheme your Sensor Cartridge is set to, press the following
buttons: Instrument > Consumable status. Then, select the Sensor Cartridge tab.
Calibration scheme A
Calibrations are performed at default intervals.
Calibration scheme B
Calibrations are performed twice as often as in calibration
scheme A.
In addition, a standby calibration is run.
Calibration scheme C
Calibrations are performed 4 times as often as in calibration
scheme A.
In addition, a standby calibration is run and the post-calibration
mode is enabled.
Calibration scheme D
Calibrations are performed 4 times as often as in calibration
scheme A.
In addition, a standby calibration is run, the post-calibration
mode is enabled, and the PO
2
parameter is assigned a calibration
alarm.
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