A13914AF
12-8
Troubleshooting Calibration and Result Errors
Linear Calibration
Span
•
Span is a measure of the sensitivity of the reagent and verifies that two consecutive calibrator
levels values are a minimum distance apart.
•
The difference between two consecutive calibrator rates or absorbances must exceed the
minimum limit or the reagent fails calibration.
Linear Calibration Report
The calibration report can be a useful tool for identifying issues.
below defines the fields
in the order they appear for each chemistry on a typical Linear Calibration Report.
Table 12.6
CC Linear Calibration Report Field Descriptions
Field
Description
Reagent Identifiers
The following fields identify specific cartridge information.
• Rgt
– Indicates which chemistry is being calibrated.
• Units
– Selected units shown for reference.
• S/N
– Specifies the serial number of the reagent cartridge being calibrated.
• Lot
– Identifies the lot number of the specific cartridge.
• Loc
– Identifies the location of the reagent cartridge on the reagent
carousel.
Cuv
The cuvette number on the reaction carousel in which the reaction took place.
Set Points
The target value for the calibrator.
Blank
The blank absorbance when it is an ENDPOINT chemistry or the blank rate
(absorbance per unit time) when it is a RATE chemistry.
Reaction
The reaction absorbance when it is an ENDPOINT chemistry or the reaction rate
(absorbance per unit time) when it is a RATE chemistry. For ENDPOINT 2 or RATE
2 reactions, the blank absorbance or blank rate must be subtracted from this
value to obtain the net delta absorbance.
The calibration is calculated using the two middle reaction values; the highest
and lowest values are not used. Back-to-back error checking is performed on
the mid reaction values.
Recovery
The value obtained when the final absorbance of each of the replicates used is
multiplied by the determined Calibration Factor. This is the value that would be
obtained if the calibrator was run as a sample using this calibration. The closer
the recovery of the calibrator is to the setpoint, the better the calibration is.
Содержание UniCel DxC 600
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