EDAX EDS Manual

SEM Multi Point Analysis
Spectrum Collect
� Near the upper left of the screen are the “Start” and “Clear”
buttons. Once the Start button has been clicked and the acquisition
has begun the button becomes a “Stop” button.
� The spectra can be saved under the “File” pull-down menu.
Peak ID
Click on “ID” from the menu bar will provide a peak ID panel (which
can be removed by clicking on “R”) which will do an “Auto” peak ID.
Elements can be highlighted from the “Elem List” and deleted
(“Del”). The “Z-” and “Z+” keys will move up and down the periodic
chart by atomic number. If the goal is to identify a specific peak
in the spectrum, then click the right mouse button on the peak and
look at the suggestions in the “Possible” list box.
Standardless Quantification
If the spectrum has been collected for a good length of time
(approximately 100 Live seconds for statistical accuracy) and all
elements are identified then by clicking on the “Conc” in the menu
bar at the top of the screen will apply a standardless
quantification on the spectrum. The results will appear in a
spreadsheet dialog box. These results can be printed, translated
into graphs, and save from this dialog box.
Image Collect
To collect an image click on “e-” (to indicate an electron image) in
the button bar and it will collect from the SEM. This image is a
frozen image and will not reflect any changes you have made to the
SEM from the Microscope Control software unless you refresh the
image by clicking on the “e-” button again. The image can be saved
under “File”, “Save as...” and specifying “.BMP” from the list box
and then giving a file name. During subsequent analysis there may
be a variety of graphics superimposed on top of the image which will
be saved with the image if it is saved at that point.
Multiple Point Analysis
In the menu bar, there is a choice “Loca - X” where the X can be
either an S for spot, an L for a line or an M for a matrix. It is
possible to select any of these 3 in the pull-down menu.
� To select spots for analysis, the image must be displayed (see
above), the menu bar should indicate “Loca-S”, and the mouse should
be clicked on the image at the point of interest. Then the “S”
button from the button bar should be clicked to save that location.
More points can be added by clicking on the image and clicking on
“S”.
� Similarly, if lines have been selected and the menu bar now
indicates “Loca-L”, you can click and drag on the image to define a
linear array of points for analysis, then click on “S”.
� For a matrix of points, click and drag a box to define the matrix
and then click on “S” to save these locations.
By default, the line will do 10 points per line and the matrix will
be a 2 X 2 matrix of points. To change either of these, click on
“Loca- “ and “Table...”, then highlight the number you want to
change, and strike the enter key.
� To display the locations on the image, click on “Loca - “ and click
on the listing to display the locations or to display the locations
with their numbers at the bottom of the pull-down menu.
Before beginning the multi-point analysis, you should be sure that:
EDAX Basic Procedures- Multi Point Analysis 1