Roche Diagnostics
A-28 Operator’s Manual · Version 3.1
2 Introduction to the instrument Cedex Bio System
Daily operation
Calibration status of a set
Each reagent set has one of the following calibration statuses:
CU (current) denotes that the set is on board and that its calibration results are currently
used.
OB (obsolete) denotes that the set’s calibration results are no longer used.
This status applies for example to the following situations:
o The set was removed and it is empty.
o The set was removed and it is not empty. It was removed more than 30 days ago.
SB (standby) indicates that the set’s calibration results are not currently used.
This status applies for example to the following situations:
o A new set was loaded and calibrated while an identical set was still in use (pre-
calibration).
o The set was removed not more than 30 days ago and it is not empty.
Calibration result storage
The current and up to five obsolete calibration results are stored on the system. If
there are more than five obsolete calibration results, the oldest obsolete calibration
results are automatically deleted as part of the daily end of shift activities.
Validating calibration results
Applications define checks for ranges and limits. If these are exceeded, the results are
flagged.
Each new calibration result has to be validated. If flags were generated, you must
determine their cause and decide whether to accept the result, rerun the calibration
or continue using the old calibration results.
You can automatically accept unflagged results and results with flags that are
contained in a specific list of flags that should be ignored.
e
See Editing the acceptable flags list on page B-160.
Calibration procedures
There are three basic procedures for performing calibration:
o Calibrating all reagent sets that need calibrating
o Calibrating all reagent sets that will need calibrating during the forecast period
o Calibrating individual reagent sets
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