A13914AF
12-2
Troubleshooting Calibration and Result Errors
MC Calibration
MC Calibration
Overview
The DxC calibrates MC chemistries using two or three calibrator levels. Four replicates are assayed
per calibrator level. Of the four replicates, only the two middle values are used to set calibration.
The highest and lowest values are discarded. The analog signals generated by the calibrator
measurements are converted to digital form (ADC values). The resulting ADC values are compared
to pre programmed error limits for back-to-back, span, and calibrator range to determine the
integrity of the calibration.
MC Calibration Checks
Both results and interim data are error checked when calibrating a chemistry. Standard results
errors, as well as interim error flags, are applied to the calibration data.
Back-to-Back
•
The back-to-back error check is a measure of system precision during calibration.
•
A back-to-back value is the difference between the two middle Sample-Reference replicate
values within a calibration level. If the back-to-back limit is exceeded the calibration fails.
•
Only the two replicates that meet back-to-back are used; all other replicates are discarded.
•
Select Calibrator Acceptance Limits under Options in the
Rgts/Cal
screen to view current
calibration limits.
MATH ERR
Calibration required
Math error – Calibration does not
fit expected model.
NO SAMP DETECT
No sample detected.
OCR HIGH
Calibration failed
Response out of range high.
OCR LOW
Calibration failed
Response out of range low.
RECOVERY
Calibration failed
Recovery error
SENSITIVITY
Calibration failed
Sensitivity error
SEV RECOVERY
Calibration required
Severe recovery error
SEV SENSITVITY
Calibration required
Severe sensitivity error
SPAN
Calibration failed
Sensitivity error
RANGE
Calibration failed
Accuracy error (ISE)
Table 12.1
Calibration Error and Remarks
(Continued)
Printed Flag
Remarks on Report
Description
Содержание UniCel DxC 600
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