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j. For a fixed collection time, SELECT the Preset dropdown menu on the right-hand side
of the Toolbar. Select a spectrum collection time in seconds either from the presets
or by typing in a value.
k. In the adjacent dropdown menu, SELECT a Time Option: Clock
Time, Live Time or ROI Counts. Clock time refers to actual time
passed; live time refers to the actual time the detector is active.
To use ROI Counts, ROIs must first be created. Refer to the EDAX
manual for more detail. The live time setting is preferable for
repeated measurements.
B. Peak identification
a. To adjust the view of the spectrum, USE the expand (<> or ◊),
contract (>< or ∨) and home keys from the toolbar. The toolbar and these controls are
shown in the figure below. The spectrum display may also be adjusted by clicking and
dragging with the mouse.
b. PRESS Clear All in the spectrum collection panel to remove any old peak labels.
c. PRESS the Peak ID button in the Spectrum Panel for automatic peak identification. The
primary peaks identified by the program will be labeled on the spectrum.
d. PRESS HPD to display a theoretical spectrum, based on the identified peaks and the
collection parameters, on top of the collected spectrum. HPD is used to confirm if the
correct elements have been identified.
e. For manual peak ID, PRESS the ◊ symbol to expand the panel. There are several ways
to manually identify peaks.
f. With the mouse, CLICK ON a peak of interest. A list of possible elements will be
displayed. The most likely peaks are at the top of the list. Scroll through the list and
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