Filter
Top Products
Calibrating a PSD Spectrum
Data Explorer
™
Software User’s Guide 8-17
8
2. Do any of the following:
• Click OK to accept the highlighted reference mass
for matching.
• Select a different reference mass and click OK.
• Type new reference mass information in the
Name, Theoretical Mass, Charge and Elemental
Composition text boxes and select the mass type.
Click OK to accept the reference mass for
matching.
NOTE: You must type in a minus sign (-) for
negative charge states.
• Type new reference mass information in the
appropriate text boxes, click Save or Save As to
add the information to the calibration reference
file, then click OK to accept the reference mass for
matching.
The PSD Calibration dialog box is displayed again (see
Figure 8-5 on page 8-13) with the observed mass and
the reference mass you selected displayed in the
Matched Peak list.
3. Repeat step 1 through step 2 until the desired peaks
are in the matched list.
For optimum mass accuracy, take at least one mass
from each segment, if possible.
The software does not allow you to add duplicate
masses collected with the same PSD Mirror Ratio.
However, if a mass exceeds the Mass Tolerance
specified in Reference Matching Criteria, but has the
same PSD Mirror Ratio, the software allows you to
add it.
4. Complete the calibration as described in “Solving and
plotting” on page 8-18.