Roche Diagnostics Replacement Page
Operator’s Manual · Version 4.1.1 D-35
MODULAR ANALYTICS EVO SWA 17 Data alarms
Data alarms D module and P module
SD!
Screen G*
*displayed on Calibration > Status > Calib Trace
Alarm SD limit exceeded
Description During nonlinear or multipoint linear calibration, the SD value was larger than the
SD limit programmed on Utility > Application.
Cause The standard solution is not placed at a correct position.
An improper SD limit value is specified.
Remedy
1
Check calibrator positions on Calibration > Calib.
2
Touch Utility > Application > Calib to check the SD Limit.
3
Check preparation and expiration dates of calibrators and reagents. Recalibrate
the affected test.
4
Check the standard concentrations on Calibration > Install. For a calibration with
automatic standard dilution; check whether the ratio between concentration,
sample, diluent volume and diluted sample is correct on Utility > Application >
Others.
5
Resume operation. If alarm recurs, call technical support.
Sens
Screen Y*
* displayed on Calibration > Status > Calib Trace
Alarm Sensitivity error
Description Sensitivity is checked for linear (2 to 6 points), nonlinear, or isozyme-P calibration.
This alarm is indicated if the sensitivity value obtained in a calibration falls out of the
sensitivity limits specified on Utility > Application > Calib.
A sensitivity value is calculated from the measured absorbances ( ) and given
concentration values ( ) of the blank calibrator ( ) and the calibrator :
Revision: CAPA 270021730
Equation revised.
, where
= Std 2 for 2 Point calibrations and span calibrator for multipoint calibrations
Cause o The standard solution or reagent is not placed at a proper position.
o The reagent has been prepared improperly or has deteriorated.
An improper sensitivity limit is specified.
The result of the calibration is updated.
Abs S
N
Abs S
1
–
Conc S
N
Conc S
1
–
-------------------------------------------------------- -
For span calibration, the previous S1 Abs (linear) or previous mean absorbance (nonlinear)
of standard solution (1) is used for the sensitivity check.
