Waters Autospec Premier Operator's Manual page 135

Calibration Parameters dialog box parameters (Continued)
Parameter
Peak window (Da)
+/-
Initial error (Da)
Intensity threshold
Polynomial order
Intensity weighting
Calibrate display
Description
Specifies the maximum mass difference between the
reference peaks and the expected position of the
corresponding peaks in the acquired calibration
spectrum.
The normal operating range for this
Note:
parameter is 0.3 to 1.5 Da. Increasing the value of
this parameter increases the chance of incorrect
peak matching.
Specifies the maximum mass difference between the
first reference peak to be matched and the
corresponding peak in the acquired calibration
spectrum.
The normal operating range for this
Note:
parameter is 0.5 to 2.0 Da. Increasing the value of
this parameter increases the chance of incorrect
peak matching.
Specifies the intensity threshold value. Any peak in
the acquired calibration spectrum with an intensity
less than this value (measured as a percentage of
the most intense peak in the spectrum) is not used
in the calibration procedure.
The normal operating range for this
Note:
parameter is 0% to 5%.
This parameter defines the number of coefficients to
be used in the calibration fit equation. The available
options are 1 to 5.
For voltage scans over a small mass range, use 1.
For voltage scans over a large mass range, use 2.
For magnet scans, use 3 to 5.
Weights the curve toward the points representing
the more intense acquired peaks. The weight of each
point is proportional to the square root of the
intensity of the acquired peak.
Applies the generated calibration to the data in the
Calibration report window Spectrum pane.
Editing the calibration parameters 5-11